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Cruise control

Cruise control is an electronic or electromechanical system in motor vehicles that automatically maintains a preset speed by regulating the without continuous driver input on the accelerator pedal. It typically activates above a minimum speed, such as 25 mph (40 km/h), and disengages when the driver applies the brakes or clutch. The modern cruise control system was invented by American engineer , who developed the first prototype in 1949 to address inconsistent speeds observed in drivers, particularly during conversations. Teetor, blinded in childhood and later president of the automotive parts company , received U.S. Patent No. 2,519,859 for his device on August 22, 1950, initially naming it "Speedostat," an electromechanical setup that used engine vacuum and to control speed. Chrysler introduced Speedostat as an optional feature on its luxury models in 1958, making it the first commercially available implementation, before expanding it to all models by 1959. General Motors adopted the technology for its lineup in 1959, rebranding it as "Cruise Control," a name that became the industry standard. Over time, cruise control evolved from basic mechanical systems to digital electronic versions in the 1990s, incorporating sensors for more precise throttle adjustments. A significant advancement came with adaptive cruise control (ACC), introduced in the late 1990s, which uses , , or cameras to maintain not only a set speed but also a safe following distance from the vehicle ahead by automatically accelerating, braking, or steering as needed. Early ACC systems, such as those employing 77-GHz with a detection range of up to 492 feet (150 meters), debuted in luxury vehicles like the 1999 . Today, cruise control reduces driver fatigue on long highway drives, promotes consistent speed for —gaining popularity during the 1973 OPEC oil embargo—and enhances safety when used appropriately, though it is less effective in heavy traffic or hilly terrain without adaptive features.

Fundamentals

Definition and Purpose

Cruise control is an electronic system that automatically maintains a vehicle's speed at a preset level by modulating the to counteract disturbances like road grade or wind resistance. This functionality reduces the driver's need to continuously monitor and adjust the pedal, particularly during prolonged travel where maintaining steady speeds is essential. The core purpose of cruise control is to provide hands-free speed regulation, thereby minimizing driver fatigue and enhancing comfort on long-distance journeys. By promoting consistent , it also contributes to improved economy, as steady speeds avoid the inefficiencies of frequent acceleration and deceleration. Originating from 20th-century automotive innovations, cruise control serves as a foundational aid in contemporary vehicles. It finds widespread application in passenger cars and trucks for reliable cruising at speeds generally above 25-30 mph, with similar systems available on select motorcycles.

Basic Components

The basic components of a cruise control system enable the automatic regulation of speed by integrating hardware for sensing, actuation, and user input with software for processing. At the core is the speed sensor, typically a speed sensor (VSS) mounted on the output shaft or hubs, which measures the rotational speed and converts it into an electrical signal representing the vehicle's current velocity. This feedback is essential for detecting deviations from the desired speed, allowing the system to adjust accordingly. The throttle actuator serves as the primary output mechanism, physically or electronically adjusting the throttle valve to control and thus vehicle acceleration. In early implementations, this was achieved using a vacuum actuator—a connected to the throttle cable that harnesses engine manifold vacuum via an electromagnetic valve to pull or release tension for speed maintenance. Modern systems, however, employ integrated with drive-by-wire technology, where an or servo directly modulates the throttle position based on digital signals for more precise and responsive operation. User interaction is facilitated by control switches, usually mounted on the or , including buttons for "on/off," "set/accelerate," "resume," and "coast/cancel." These provide commands to engage the system, store the current speed, increase or decrease the target speed, or disengage it, ensuring driver oversight during operation. On the software side, a or (ECU)—often a dedicated or integrated into the engine control —processes inputs from the speed sensor and switches, then generates output signals to the actuator. This unit compares the measured speed against the set value and issues corrective commands to sustain constant velocity. The system draws from the vehicle's 12-volt electrical system, with wiring harnesses connecting all components for reliable and control. Safety overrides are incorporated via switches on the and pedals, which immediately interrupt to the and disengage cruise control when activated, preventing unintended . Together, these elements form a closed-loop setup that maintains the driver's selected speed on highways, reducing the need for continuous pedal input.

Historical Development

Invention and Early Patents

The origins of cruise control trace back to early 20th-century efforts to regulate automobile speeds using governors, precursors to modern systems. One of the earliest implementations appeared in the Wilson-Pilcher automobile, an English single-gear vehicle equipped with a governor to maintain consistent speeds without constant driver intervention. This device, adapted from technology, represented an initial attempt at automated speed control but was limited to basic single-gear operation and lacked adjustability. Further advancements followed with U.S. Patent No. 1,082,383, granted to inventor Alexander Winton on December 23, 1913, for a speed governor designed for internal combustion engines in automobiles. Winton's used to modulate engine throttle based on vehicle speed, aiming to prevent excessive acceleration while allowing manual overrides. By the 1920s, rudimentary speed governors became more common on cars, often requiring drivers to manually adjust and fuel flow for speed regulation, though these systems were imprecise and not fully automatic. The modern cruise control system is credited to Ralph R. Teetor, an American automotive engineer who lost his sight at age five due to an accident but pursued a career in invention, eventually becoming president of Perfect Circle Corporation, a manufacturer. Teetor's motivation stemmed from a 1940s experience riding as a passenger with his , who inconsistently varied speed—slowing near churches and speeding past schools—prompting Teetor to seek a hands-free driving aid for greater comfort and consistency. He developed initial prototypes in the early 1940s using mechanical linkages connected to the , incorporating a driven by the cable to sense and maintain set speeds. These early designs emphasized simplicity, relying on analog components like vacuum diaphragms to resist accelerator pedal movement once the desired speed was reached. Teetor's breakthrough invention culminated in U.S. Patent No. 2,519,859, titled "Speed Control Device for Resisting Operation of the Accelerator," filed on August 11, 1948, and issued on August 22, 1950. The patented system featured a dashboard speed selector linked to a vacuum-operated mechanism that provided foot resistance at the preset speed, allowing drivers to maintain velocity effortlessly while permitting overrides for acceleration or braking. This represented a significant innovation over prior governors, introducing a feedback loop for precise speed maintenance without fully disengaging driver control. Prior to the 1950s, however, such systems faced limitations inherent to analog mechanics, including reliance on mechanical wear-prone parts and susceptibility to road vibrations, resulting in less accurate control compared to later electronic iterations.

Commercial Adoption and Evolution

The first commercial implementation of cruise control occurred in the 1958 , where it was introduced as an optional "Auto-Pilot" feature based on Ralph Teetor's patented design, utilizing electromagnetic speed sensing tied to the cable. This system marked the transition from experimental concepts to market availability, initially limited to luxury models as a premium add-on. During the 1960s, adoption expanded within ' lineup, with integrating the technology in 1959 and rebranding it as "Cruise Control," making it available as an option across higher-end vehicles. By the , cruise control had become a standard or commonly offered feature in luxury automobiles from major manufacturers, reflecting growing consumer demand for long-distance driving aids amid expanding interstate networks. The 1980s saw initial shifts toward electronic systems, exemplified by Mercedes-Benz's introduction of Tempomat in 1975 on models like the 450 SEL 6.9, with the electronic E-Tempomat following in the mid-1980s. Ford followed with electronic cruise control enhancements in its lineup by the mid-1980s, incorporating for improved reliability. Into the 1990s, the industry transitioned more broadly from mechanical and vacuum-operated systems to fully electronic variants, enabling finer control through microprocessor-based algorithms and vehicle speed sensors. By the 2000s, integration with the Controller Area Network (CAN) bus became widespread, allowing cruise control to interface with engine management and diagnostic systems for enhanced performance and fault detection across mid-range and luxury vehicles. By the 2020s, standard cruise control had achieved near-universal penetration in new U.S. vehicles, exceeding 90% availability as a base feature even in entry-level models, driven by regulatory incentives and consumer expectations for basic . In contrast, adoption in lagged initially due to denser , stricter enforcement of variable speed limits, and a cultural emphasis on manual driving, though it has since accelerated with harmonized safety standards.

Operational Principles

Standard Cruise Control Mechanics

Standard cruise control engages when the driver reaches the desired vehicle speed, typically above 25-30 mph, and activates the system using a dedicated switch or button on the or stalk. The switch signals the () or servo mechanism to capture the current from the vehicle's , which is often derived from the or wheel speed data, thereby setting this as the target speed. Once engaged, the system maintains the set speed through a continuous feedback loop that monitors deviations in actual velocity using the speed sensor. If the vehicle slows due to hills or wind resistance, the control module adjusts the throttle position via an actuator—such as a vacuum servo or electronic motor—to increase engine power proportionally to the speed error, defined as the difference between the target and measured speed. This adjustment is governed by a PID (proportional-integral-derivative) controller, which uses proportional response for immediate correction, integral action to eliminate steady-state error, and derivative action to anticipate changes and reduce overshoot. Disengagement occurs immediately upon driver intervention, such as pressing the or pedal, which triggers release switches that interrupt the vacuum supply or electrical signal to the , returning control to the driver. Manual cancellation via the off switch also deactivates the system, ensuring the driver retains override authority at all times.

Speed Maintenance and Control Algorithms

Standard cruise control employs a closed-loop feedback system to regulate vehicle speed. The core of this mechanism involves continuously measuring the actual vehicle speed via a speed sensor and computing the speed error as e(t) = v_{\text{set}} - v_{\text{actual}}, where v_{\text{set}} is the driver-selected target speed and v_{\text{actual}} is the current speed. This error signal drives adjustments to the engine throttle, increasing fuel delivery when the error is positive (speed too low) or reducing it when negative (speed too high), thereby minimizing deviations from the set speed. The feedback loop inherently compensates for external disturbances such as road load, wind resistance, and minor grade changes by responding to the resulting speed error. The control algorithm uses a controller to determine position, given by the equation \tau(t) = K_p \cdot e(t) + K_i \int_0^t e(\tau) \, d\tau + K_d \frac{de(t)}{dt}, where \tau(t) is the adjustment, K_p, K_i, and K_d are the proportional, , and gains, respectively—tuning parameters that dictate the aggressiveness, steady-state accuracy, and of the response. The term ensures zero steady-state error under constant disturbances, while the term helps prevent oscillations. Modern electronic control units (ECUs) refine this by incorporating lookup tables for road load compensation, mapping factors like vehicle mass, aerodynamic drag, and to precomputed offsets, ensuring more precise speed maintenance under varying conditions. Additional algorithmic features handle resumption and disengagement scenarios. For instance, after temporary deactivation (e.g., via application), the resumes the prior set speed only if the current speed exceeds a predefined , typically around 20-30 , to ensure safe re-engagement. The samples speed at rates of 10-100 Hz, balancing responsiveness with computational efficiency in the . However, limitations arise on steep inclines exceeding 10% grade, where the adjustment may insufficiently counter gravitational forces, leading to speed loss and necessitating manual override for safety.

Advanced Variants

Adaptive Cruise Control

Adaptive cruise control (ACC) enhances traditional cruise control by dynamically adjusting the vehicle's speed to maintain a safe following distance from the leading vehicle, using sensors to monitor traffic ahead. If the leading vehicle slows down, the ACC system reduces speed accordingly, potentially coming to a in stop-and-go traffic, and resumes acceleration when the path clears. This functionality improves driver comfort and reduces on highways and in congested conditions. The system relies on a combination of sensors for accurate detection. Primary among these is millimeter-wave , operating typically at 76-77 GHz, which provides robust and relative speed measurements up to 150-200 meters ahead, even in adverse weather. Forward-facing cameras supplement by detecting lane markings and additional vehicles, while algorithms integrate data from both to enhance reliability and handle complex scenarios like cut-ins. may also be used in some implementations for precise ranging, though remains dominant due to its all-weather performance. ACC operates using time-gap following policies, where the system maintains a driver-selectable of typically 1 to 2 seconds behind the leading vehicle, balancing safety and . In low-speed modes, advanced versions support stop-and-go functionality, automatically braking to halt and restarting without driver intervention when traffic moves. These behaviors ensure smoother operation in urban or , though the driver must remain attentive and ready to intervene. Mercedes-Benz introduced the first production ACC system, branded Distronic, in its 1999 S-Class model, marking a milestone in commercial availability. As of model year 2023, with was standard on 23% of new vehicle series and optional on 31%, with higher adoption rates in premium segments where it is often included as standard equipment (IIHS, 2024). The (NHTSA) classifies , particularly when combined with lane-keeping assistance, as SAE Level 2 partial automation, requiring driver supervision at all times.

Integration with Vehicle Automation

Cruise control systems have evolved to integrate seamlessly with advanced driver assistance systems (ADAS), particularly through synergies with lane-keeping assist (LKA), enabling hands-free highway driving. In systems like Tesla's , () combines with to maintain both speed and lateral position, allowing drivers to remove their hands from the wheel on pre-mapped highways while requiring visual attention. Similarly, ' Super Cruise employs precision GPS mapping, LiDAR-mapped roadways, and driver-facing cameras to provide hands-free operation up to 80 mph on compatible roads, integrating with automated lane changes and navigation. This integration positions cruise control as a core component of Level 2 partial , where the system handles both longitudinal (speed) and lateral () , but the driver remains responsible for supervision. Beyond standalone features, higher levels leverage vehicle-to-vehicle (V2V) communication for cooperative (CACC), enabling convoying or platooning where vehicles share speed and position data to maintain tight formations, reducing fuel consumption by up to 10% in applications. Specific advancements include sensor fusion techniques that incorporate GPS and inertial measurement units (IMUs) for predictive speed adjustments, anticipating road curvature or elevation changes to smooth vehicle dynamics without abrupt interventions. Over-the-air (OTA) updates further enhance these algorithms, allowing manufacturers to refine control logic based on fleet data, such as improving ACC responsiveness in adverse weather. In the 2020s, eye-tracking technologies for driver monitoring have become integral, using infrared cameras to verify gaze direction and detect distractions during Level 2 operation, as seen in systems like Ford's BlueCruise, which disengages if attention lapses. In November 2024, the NHTSA finalized updates to its New Car Assessment Program (NCAP) to include evaluations of ACC combined with lane centering assistance as part of advanced driver assistance systems.

Benefits and Limitations

Driver and Efficiency Advantages

Cruise control offers significant driver benefits by minimizing physical exertion and mental demands during extended travel. By eliminating the need for continuous pedal input, it reduces leg , particularly on long trips where manual speed maintenance can lead to discomfort after hours of . This allows drivers to adopt a more relaxed posture, lowering overall levels in monotonous conditions such as straight rural roads or steady , with surveys showing that nearly half of users report reduced . For older and disabled drivers, cruise control provides key ergonomic advantages by simplifying speed regulation, which requires less precise foot control and can accommodate reduced or reflexes. Research on driver assistance technologies demonstrates that cruise control eases cognitive by handling routine speed tasks, thereby reducing and supporting prolonged safe for seniors. In terms of , cruise control promotes optimal through consistent speeds, typically in the 55-65 mph where aerodynamic is balanced. testing reveals economy improvements averaging 7% and reaching up to 14% compared to , as steady RPM avoids inefficient accelerations and decelerations. This uniformity also lowers emissions, since speed fluctuations can boost consumption by as much as 20%, indirectly cutting gases through smoother operation. National Highway Traffic Safety Administration data highlights minor accident reductions on rural highways, attributed to fewer unnecessary lane changes and more stable following distances among cruise control users. Quantitatively, it narrows speed variations—often exceeding 10 mph under manual control—to under 2 mph, fostering better vehicle stability and efficiency without abrupt inputs.

Safety Risks and Technical Drawbacks

One notable safety risk associated with (ACC) systems is phantom braking, where the vehicle suddenly decelerates without an apparent obstacle, potentially leading to rear-end collisions from following traffic. In vehicles, for instance, the (NHTSA) received numerous complaints about this issue, with reports surging in early 2022 but building from earlier incidents dating back to 2019 model years, prompting an investigation into over 400,000 vehicles for unexpected emergency braking activations. ACC systems also frequently fail to detect stationary or slow-moving objects, such as stopped vehicles, barriers, or , because radar-based sensors are optimized for moving targets and may ignore objects below certain speeds, like under 6 . Tesla's explicitly warns that Traffic-Aware Cruise Control "cannot detect all objects and may not brake/decelerate for stationary vehicles, especially in situations when you are driving over 50 ," requiring drivers to remain vigilant. Similar limitations are noted in other manufacturers' documentation, such as Ford's, where the system may not detect stationary vehicles below 6 . Human factors exacerbate these risks, as drivers often develop over-reliance on cruise control, leading to delayed reactions in critical situations; studies indicate that automation reliance can increase response times by affecting the type and timing of driver interventions. Basic cruise control versions provide no steering assistance, leaving full lateral control to the driver, which heightens the danger if attention lapses on winding roads or in traffic. Misuse of ACC, such as setting speeds above limits, has been linked to a 10% higher risk of fatal crashes according to Insurance Institute for Highway Safety (IIHS) research, primarily due to induced speeding behaviors. Specific incidents underscore these hazards, including the 2009-2010 Toyota recalls affecting over 10 million vehicles for unintended due to floor mat entrapment and sticky accelerator pedals, with at least 34 deaths alleged, though NHTSA attributed most incidents to driver pedal misapplication rather than electronic defects. More recently, NHTSA documented phantom braking cases in models leading to near-misses, with over 350 complaints by 2022 highlighting the potential for chain-reaction accidents. Technical drawbacks further limit reliability; standard cruise control often proves ineffective on curves or grades, as it does not automatically adjust for road geometry or changes, potentially causing speed overshoots of up to 10-15 on downhills if the system fails to apply and relies solely on reduction. Electronic failures, such as those from dirt accumulation or wiring faults, can disable the system entirely; for example, sensors blocked by grime or insects trigger warnings like "clean " in vehicles from and , interrupting speed maintenance. Wiring issues in the switch or speed circuits are common culprits, leading to intermittent disengagement during operation.

Technological and Regulatory Aspects

Implementation Challenges

Implementing cruise control systems presents several engineering hurdles, particularly when older vehicles equipped with throttles. These legacy systems rely on cable linkages rather than controls, making of modern cruise actuators challenging and often requiring custom modifications to the body or additional servo mechanisms. for diverse engine types further complicates deployment; engines demand precise response tuning to maintain speed under varying loads, while electric vehicles (EVs) necessitate adjustments to motor curves and battery management systems to account for instantaneous power delivery differences. Cost remains a significant barrier to widespread . Basic cruise control kits typically add $100 to $300 to vehicle expenses, depending on and installation complexity. In contrast, (ACC) systems, which incorporate or sensors, escalate costs to $500–$2,000 due to the need for advanced hardware and software integration. Post-2020 supply chain disruptions, including shortages of chips essential for ACC, have exacerbated these issues by delaying production and increasing component prices amid global constraints. Compatibility challenges arise across vehicle configurations, notably with transmissions and load variations. Manual transmissions require driver intervention for gear shifts during speed adjustments, reducing the seamlessness of cruise control compared to automatic transmissions, where electronic control units can autonomously manage shifts. In heavy-duty trucks, variable loads—ranging from empty hauls to fully laden configurations—demand dynamic recalibration of control algorithms to prevent instability or excessive fuel consumption, as standard systems struggle with the altered vehicle dynamics. As of 2025, integrating cruise control into EVs highlights specific software challenges related to . Systems must incorporate tweaks to harmonize speed maintenance with energy recuperation, such as modulating regenerative torque to avoid abrupt deceleration while preserving set speeds on inclines or during . Global disparities in adoption are pronounced, with developing markets exhibiting limited penetration due to high upfront costs and constraints, contrasting with higher uptake in regions like where affordability and regulatory support are stronger.

Standards and Future Directions

International standards for adaptive cruise control (ACC) systems are primarily outlined in ISO 15622:2018, which specifies performance requirements, control strategies, and test procedures to ensure reliable speed maintenance and collision avoidance in varying traffic conditions. Complementing this, the Economic Commission for Europe (UNECE) Regulation No. 79 (UN ECE R79) governs adaptive systems by setting uniform provisions for vehicle approval related to steering equipment and advanced driver assistance functions, including requirements for hands-off detection and lane-keeping integration with ACC to enhance highway stability. In the United States, while there is no specific Federal Motor Vehicle Safety Standard (FMVSS) mandating cruise control features, the (NHTSA) provides guidelines for Level 2 automation, emphasizing driver engagement and system limitations for combined functions like and . Regulatory frameworks continue to evolve to promote safer and more integrated vehicle technologies. The European Union's General Safety Regulation (GSR), effective from July 2022, mandates (ISA) systems in all new vehicles, requiring recognition and advisory or limiting interventions to reduce speeding-related incidents, with full enforcement for new vehicle types by 2024 and all registrations by 2027. In the U.S., potential regulations by 2030 aim to accelerate (V2X) integration, as outlined in the Department of Transportation's 2024 National V2X Deployment Plan, which aims to accelerate V2X deployment through goals for increasing capable vehicle models and infrastructure coverage by 2030-2034 to enable cooperative for improved and . Looking ahead, future directions in cruise control emphasize AI-enhanced predictive capabilities, such as algorithms that anticipate traffic patterns by analyzing real-time data from sensors and , allowing systems to proactively adjust speeds and reduce energy use beyond reactive . This evolution is poised to merge cruise control with full Level 4 , where vehicles operate without in defined operational domains, integrating longitudinal seamlessly into self-driving architectures as demonstrated by ongoing deployments from companies like and . Emerging trends post-2025 include widespread adoption of over-the-air () wireless updates, enabling remote enhancements to cruise control algorithms for better performance and security without service visits, a feature increasingly standard in connected vehicles. Sustainability efforts focus on EV-optimized cruise control, which uses predictive modeling to minimize drain by smoothing acceleration and maintaining optimal speeds, potentially reducing through predictive modeling, as demonstrated in real-world studies showing improvements for electric vehicles. For freight applications, truck platooning—where automated coordinates convoys—promises efficiency gains, with studies showing fuel reductions of 10-15% in multi-truck formations due to aerodynamic benefits on highways.

References

  1. [1]
    How Cruise Control Systems Work - Auto | HowStuffWorks
    The cruise control system controls the speed of the car by adjusting the throttle position, so it needs sensors to tell it the speed and throttle position.What Cruise Control Does · Controlling the Cruise Control · Adaptive Cruise ControlMissing: definition | Show results with:definition
  2. [2]
    The Sightless Visionary Who Invented Cruise Control
    ### Summary of Ralph Teetor and Cruise Control Invention
  3. [3]
    History of Cruise Control System | TomTom Newsroom
    Mar 30, 2022 · Invented in the early 1900s, cruise control became popular on luxury vehicles, but has since become a vital and incredibly useful piece of automotive tech.Missing: definition | Show results with:definition
  4. [4]
    Cruise Control: System Modeling
    The purpose of the cruise control system is to maintain a constant vehicle speed despite external disturbances, such as changes in wind or road grade.
  5. [5]
    [PDF] Feedback Examples: Cruise Control
    Sep 2, 2018 · The PI controller is able to adjust the throttle to compensate for the effect of the hill and maintain the speed at the reference value of ...
  6. [6]
    Chapter 1. Introduction - Cooperative Adaptive Cruise Control ...
    Cooperative Adaptive Cruise Control Human Factors Study. Chapter 1. Introduction. This summary report provides an overview of four human factors experiments ...<|control11|><|separator|>
  7. [7]
    Design and Evaluation of Cooperative Adaptive Cruise Control ...
    Dec 12, 2019 · This control algorithm can help vehicles reduce fuel consumption, emissions, driver fatigue, and traffic congestion. ... highway driving ...
  8. [8]
    Driving More Efficiently | Department of Energy
    Using cruise control on the highway helps maintain a constant speed and, in most cases, will save gas. On newer cars cruise control has additional safety ...
  9. [9]
    Future cruise control to have environmental, safety features
    Feb 26, 2013 · Using conventional cruise control does not correct that because it applies the throttle in the interest of steady speed, just as the driver ...
  10. [10]
    A brilliant touch | USPTO
    Oct 1, 2024 · Ralph Teetor, a blind inventor who used his exceptional sense of touch to create cruise control and other innovations that transformed the automotive industry.
  11. [11]
    Interpretation ID: nht93-4.20 - NHTSA
    One of the vehicle controls regulated by this standard is the automatic vehicle speed system, or cruise control. Kenworth is in the process of developing a new ...Missing: motorcycles | Show results with:motorcycles
  12. [12]
    Chapter 1. Introduction - Cooperative Adaptive Cruise Control ...
    Current cruise control systems, both conventional and ACC, are marketed as convenience systems that reduce driver workload and stress by relieving the driver ...
  13. [13]
    Cruise control - FBSwiki
    Oct 14, 2014 · The basic operation of a cruise controller is to sense the speed of the vehicle, compare this speed to a desired reference, and then accelerate ...
  14. [14]
    https://www.folsomautomall.com/blog/2022/november/21/the-history-of-cruise-control.htm
  15. [15]
    US Patent: 1,082,383 - Speed Governor - DATAMP
    US patent 1082383 Speed Governor was issued to Alexander Winton of Cleveland, Cuyahoga County, OH. It was granted on 12/23/1913.
  16. [16]
    U.S. patent issued for first modern cruise control device
    Aug 21, 2017 · Ralph R. Teetor of Hagertown, Ind., is awarded a US patent on Aug. 22, 1950, for a speed-control device that developed into modern cruise control.
  17. [17]
    Ralph Teetor | National Inventors Hall of Fame®
    U.S. Patent No. 2,519,859. Inducted in 2024. Born Aug. 17, 1890 - Died Feb. 15, 1982. Automotive engineer Ralph Teetor invented cruise control in the 1940s.Missing: 2315088 | Show results with:2315088
  18. [18]
    Ralph Teetor: The Blind Visionary Who Invented Cruise Control
    Sep 20, 2024 · America's first blind engineer designed an automatic transmission before GM, and his Speedostat became.Missing: 2315088 | Show results with:2315088
  19. [19]
    Speed control device for resisting operation of the accelerator
    US2519859A. United States. Patent. Download PDF Find Prior Art Similar. Inventor: Ralph R Teetor; Current Assignee. The listed assignees may be inaccurate.
  20. [20]
    Cruise Control: from 1950 to radar, greater comfort in travel | Pirelli
    Jan 12, 2023 · Cruise control works by acting on the throttle, a vital part of the engine that regulates the amount of air that can enter the combustion chambers.Missing: definition | Show results with:definition
  21. [21]
    When Did Cruise Control Come Out? - HBOIOT
    Oct 5, 2024 · The first car to be equipped with cruise control was the 1958 Chrysler Imperial. Chrysler marketed this feature under the name “Auto-Pilot.
  22. [22]
    Mercedes' Original Cruise Control System Revolutionized The Market
    Aug 15, 2025 · Cruise Control Becomes “A Thing”​​ In September 1975, Mercedes-Benz fitted its all-new cruise control system to its 450 SEL 6.9 and a few select ...
  23. [23]
    Classic Mercedes-Benz Cruise Control - E-Tempomat System
    Today, we will explore the E-Tempomat cruise control system used in vehicles from the mid-1980s until the early 1990s. ... In the digital cruise control amplifier ...
  24. [24]
    Buick - Electronic Cruise Controls (1990) - YouTube
    Sep 4, 2013 · This video, taken from Buick's Know-how Series (KH-127), provides a discussion on Electronic Cruise Control systems for early 90s Buick ...
  25. [25]
    The evolution of cruise control - HERE Technologies
    Apr 19, 2018 · By the early 1990s, car manufacturers had begun building upon cruise control with new technologies, and the following decades have seen ...
  26. [26]
    CAN-Bus: Introduction and History | Blogs - Altium Resources
    Aug 28, 2020 · This article is part of a three-part introductory series on the controller area network bus (better known as CAN bus).
  27. [27]
    Ten ADAS features surpass 50% newer vehicle market share
    Oct 4, 2024 · ... cruise control, and lane centering assistance have also demonstrated significant U.S. market penetration, each exceeding 50% in new vehicles.
  28. [28]
    Speed limit in Europe: Differences by country and key regulations
    Apr 18, 2025 · City speed limits can be comparable, but some U.S. states allow freeway speeds of 75-85 mph (120-137 km/h), considerably higher than in European ...
  29. [29]
    [PDF] CRUISE CONTROL SYSTEMS - GMCMI
    When the cruise control function is engaged, the transducer senses vehicle speed and controls the vacuum level to the servo to maintain the cruise speed ...
  30. [30]
    [PDF] Simple Control Systems
    The purpose of cruise control is to keep the velocity of a car constant. The driver drives the car at the desired speed, the cruise control system is ...
  31. [31]
    Cruise Control: System Analysis
    Therefore we need to design a feedback controller which speeds up the response significantly without negatively affecting the other dynamic performance metrics.
  32. [32]
    Cruise Control: PID Controller Design
    The first thing to do in this problem is to find a closed-loop transfer function with a proportional control ( $C = K_p$ ) added.
  33. [33]
    [PDF] Feedback Examples: Cruise Control
    Aug 18, 2019 · The PI controller has proportional gain kp = 0.5 and integral gain ki = 0.1. ... The reason for this is that the zero frequency gain from throttle ...
  34. [34]
    Compensation Tables - EFI Tuning Fundamentals - HP Academy
    Summarising this module, compensation tables allow the ECU to modify the fuel or spark delivery, in order to meet the demands of changing atmospheric conditions ...Missing: cruise control resistance lookup
  35. [35]
    Resuming Cruise Control - Kia Owner's Manual
    If you press the ( ) switch, vehicle speed will resume to the preset speed. The vehicle speed must be above 30 km/h (20 mph) for Cruise Control to resume.
  36. [36]
    [PDF] Cruise Control | Best Practice Guide | eDriving
    Usually, the system can only be operated at speeds over approximately 30 mph / 48 kph, but you should make sure that the speed you set does not exceed the legal.
  37. [37]
    Help understanding sampling rate and filtering - HP Academy
    Aug 19, 2023 · The ECU log in my car samples everything at the same rate. I have a choice of 100, 50, 33, 25, 20, 10 and 1 Hz. The majority of my work, I do it at 50Hz.
  38. [38]
    Cruise control using model predictive control with constraints
    The cruise control system of a harvester however calls for a sampling rate of 20 Hz. Of course, a lot of methodologies exist to solve these optimisation ...
  39. [39]
    Getting the Most Out of Cruise Control - Heavy Duty Trucking
    May 17, 2019 · Standard cruise control works best on level terrain, but predictive cruise control really shines in hilly, rolling terrain. Photos: Jim Park.
  40. [40]
    Driver Assistance Technologies | NHTSA
    Adaptive cruise control automatically adjusts the vehicle's speed to keep a pre-set distance between it and the vehicle in front of it. Lane Centering ...
  41. [41]
    Adaptive Cruise Control Systems
    Radar sensors employ microwave signals (typically at 35 or 76 GHz). Lidar sensors employ a laser diode to produce infrared light signals. Both types of sensors ...
  42. [42]
    The effects of adaptive cruise control (ACC) headway time on young ...
    This work has shown that driving with ACC might help reduce overtaking frequencies and more considerable when the headway time is set to 3 secs.
  43. [43]
    Driver Assistance Tech FAQ - Mercedes-Benz USA
    Oct 9, 2017 · Note: DISTRONIC radar-based cruise control was introduced in 1999 in the W220 S-Class, and then DISTRONIC PLUS with PRE-SAFE Brake was ...
  44. [44]
    [PDF] National Highway Traffic Safety Administration Preliminary ...
    • Level 2 - Combined Function Automation: This level involves automation ... An example of combined functions enabling a Level 2 system is adaptive cruise control ...
  45. [45]
    Super Cruise for Select Vehicles - Chevrolet
    Super Cruise is the first true hands-free driver assistance technology for compatible roads, and it's now being offered on more Chevy vehicles than ever before.
  46. [46]
    https://www.nhtsa.gov/sites/nhtsa.gov/files/811070.pdf
  47. [47]
    Adaptive Cruise Control with Sensor Fusion - MATLAB & Simulink
    This example shows how to implement a sensor fusion-based automotive adaptive cruise controller for a vehicle traveling on a curved road using sensor fusion.
  48. [48]
    [PDF] Survey Results on Adaptive Cruise Control Systems - NHTSA
    This study suggests that there may be safety benefits from using this technology, such as reduction in stress, decreased lane changes and longer following ...
  49. [49]
    [PDF] Older Drivers and Advanced Driver Assistance Systems
    Dec 20, 2020 · For example, a driver who has lane keeping assist and adaptive cruise control activated may allocate cognitive resources freed up by the ...
  50. [50]
    We Test the Tips - Edmunds
    and get some unexpected results.
  51. [51]
    Fuel-efficient driving techniques - Natural Resources Canada
    Tests have shown that varying your speed up and down between 75 and 85 km per hour every 18 seconds can increase your fuel use by 20%. Consider using cruise ...
  52. [52]
    Tesla Investigated over Phantom Braking—416,000 Cars Involved
    Feb 19, 2022 · NHTSA is looking into complaints of trouble with the automated emergency braking system in 2021 and 2022 Tesla Model 3 and Model Y electric vehicles.
  53. [53]
    Tesla drivers report a surge in 'phantom braking'
    Feb 2, 2022 · Owner reports of phantom braking to NHTSA rose to 107 complaints in the past three months, compared with only 34 in the preceding 22 months.<|separator|>
  54. [54]
    Tesla Autopilot - What Does It Do and How Does it Work?
    From the Owner's Manual: “Traffic-Aware Cruise Control cannot detect all objects and may not brake/decelerate for stationary vehicles, especially in situations ...Tesla Autopilot Overview · Standard Autopilot... · Tesla Autopilot Faqs
  55. [55]
    Adaptive Cruise Control Limitations
    WARNING: The system may not detect stationary or slow moving vehicles below 6 mph (10 km/h). WARNING: The system does not detect pedestrians or objects in the ...
  56. [56]
    Cruise Control May Prevent Speeding, But Slow Reaction Times
    Sep 17, 2014 · Thus, Vollrath and colleagues hypothesized that when drivers were using cruise control or ACC systems, they might speed less often, but would ...
  57. [57]
    [PDF] Driver performance in the presence of adaptive cruise control ...
    It was suggested that reliance on the. ACC both delayed and affected the type of response applied by the drivers. The effects of reliance on automation have ...
  58. [58]
    Adaptive cruise control spurs drivers to speed - IIHS
    Mar 11, 2021 · Drivers are using adaptive cruise control (ACC) as a tool for speeding, possibly undermining the feature's potential safety benefits, a new study from the ...Missing: variation | Show results with:variation
  59. [59]
    [PDF] Toyota Sudden Acceleration: A Case Study of the National Highway ...
    Toyota's sudden acceleration issue involved at least 34 deaths, 10 million vehicles recalled, and the cause of the defects may still be unknown. Toyota failed ...<|separator|>
  60. [60]
    [PDF] phantom braking - DOT NHTSA ODI Document
    Feb 16, 2022 · Summary: The Office of Defects Investigation (ODI) has received 354 complaints alleging unexpected brake activation in. 2021-2022 Tesla Model 3 ...Missing: 2019 | Show results with:2019
  61. [61]
    Troubleshooting Adaptive Cruise Control - GMC Canada
    Blocked or dirty radar sensors or cameras; Poor lighting; Vehicles being followed that have unusual shapes. SAFETY CONSIDERATIONS WHEN USING ADAPTIVE CRUISE ...
  62. [62]
    Dirty Cruise Control Sensor | Cadillac Owners Forum
    Dec 13, 2013 · The CLEAN RADAR message displays in the DIC when the DSCC module detects a blockage of the radar. The radar may be blocked by snow, ice, dirt, heavy rain or ...Missing: failure | Show results with:failure
  63. [63]
    https://www.mdpi.com/2076-3417/12/14/7094
  64. [64]
    Can you retrofit cruise control? - Drive
    Jan 4, 2025 · The difficulty of fitting cruise control to a vehicle depends on a few factors, mainly the type of throttle it has. Older cars use a manual, ...
  65. [65]
    Adaptive Cruise Control in Electric Vehicles with Field-Oriented ...
    Jul 14, 2022 · This paper presents the relationship between an adaptive cruise control system and the motor control in the case of an electric vehicle.
  66. [66]
    https://www.chicagofed.org/publications/chicago-fed-letter/2022/473
  67. [67]
    Adaptive Cruise Control: Should You Pay Extra For It?
    Mercedes originally featured it on its 1999 S-Class. In essence, not only did the 1999 S-Class introduce adaptive cruise control (ACC), but it also set the ...<|control11|><|separator|>
  68. [68]
    Why the Automotive Chip Crisis Isn't Over (Yet)
    Then, starting in November 2020, supply chain issues started to surface, and output dropped again below 2019 levels and largely stayed there through July 2022.Missing: radar cruise
  69. [69]
    Does Adaptive Cruise Control Work With a Manual Transmission?
    Oct 24, 2020 · According to Autotrader, adaptive cruise control in a car with a manual transmission works half as good as one with an automatic.<|separator|>
  70. [70]
    Deep truck cruise control: Field experiments and validation of heavy ...
    This article investigates transfer and robustness of continuous control systems learned using model free deep-RL as an alternative.
  71. [71]
    [PDF] 2025-Kia-EV6-Vehicle-Feature-Tips
    The minimum regenerative braking level can be adjusted when in AUTO mode by using the left and right paddle switches. Adjust the Smart Regeneration levels in ...
  72. [72]
    https://unece.org/fileadmin/DAM/trans/main/wp29/wp29regs/2018/R079r4e.pdf
  73. [73]
    Adaptive cruise control systems - ISO 15622:2018
    In stockISO 15622:2018 covers performance requirements and test procedures for Adaptive Cruise Control (ACC) systems, including control strategies and minimum ...
  74. [74]
    [PDF] Agreement Addendum 78: UN Regulation No. 79 - UNECE
    Sep 14, 2017 · UN Regulation No. 79, addendum to the agreement, concerns uniform provisions for vehicle approval regarding steering equipment.
  75. [75]
    General Safety Regulation Mandates Intelligent Speed Assist ...
    Aug 24, 2022 · Intelligent Speed Assist is now required on all new vehicles being sold in the European Union, and in many other countries. Around the world, ...
  76. [76]
    [PDF] Beyond 5.9 V2X Deployment Plan - ITS America
    The plan analyzes V2X technologies outside 5.9 GHz, aiming for a diverse approach to create flexible, interoperable systems for safety and efficiency.
  77. [77]
    How Artificial Intelligence Is Changing The Auto Industry
    Jul 28, 2025 · Adaptive Cruise Control (ACC): ACC goes beyond traditional cruise control by using AI to monitor traffic conditions in real time, allowing ...
  78. [78]
    Understanding Level 4 Autonomous Driving Systems, from Currently ...
    Jul 20, 2025 · The necessary hardware to achieve Level 4 autonomy will be integrated into the Gravity's assembly line. The Nuro Driver software will be ...Cruise · Waymo Driver · Nuro Driver
  79. [79]
    5 Key Trends in Car Connectivity - KORE Wireless
    Jul 17, 2025 · Vehicle updates and responses. Vehicles receive over-the-air (OTA) software updates to improve security, navigation, and system performance.
  80. [80]
    Effect of adaptive cruise control on fuel consumption
    Nov 19, 2024 · This can be interpreted as every additional min spent on a km (decrease in trip speed) increases the FC by roughly an additional 4 L/100 km.
  81. [81]
    What Is Truck Platooning? How It Works and Its Benefits - Blog
    In field tests, two-truck platoons show roughly 6–12% lower fuel use per vehicle on highways, while three-truck formations can reach 10–15% under favorable ...