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Cruise control (also known as speed control, cruise command, autocruise, or tempomat) is a system that automatically controls the speed of an automobile. The system is a servomechanism that takes over the car's throttle to maintain a steady speed set by the driver.
With modern drive by wire fuel controls, problems are believed to occur exclusively while the vehicle is under way. General Motors cars of the 1950s with automatic transmissions have the R for reverse at the furthest clockwise position in the rotation of the column-mounted shift lever. L for low position is just adjacent as the lever moves one ...
Early cars had a hand lever to control the throttle, either directly, or by controlling an engine speed governor which in turn controlled both the throttle and timing. [6] In 1900 the Wilson-Pilcher car was introduced in Britain which had a hand controlled speed governor, and a foot throttle which could override the action of the governor.
Informing other drivers of problems with their car, such as headlamps left off after dark, burned out or misaligned lights, or misuse of high beam rather than low beam in traffic; [9] or to berate a driver who poses a risk to traffic. [7] Headlight flashing coupled with blowing the car's horn can help clear deer from a driver's path. [10]
Eco light (newer cars) indicates that vehicle is in efficient/fuel-saving operation; Eco/comfort/sport mode – Driving modes to drive economically or for excitement; Electronic Power Control (EPC) indicating a problem with the engine's throttle or other electronic control systems. [12] [13]
The ECM is a type of electronic control unit (ECU), which is an embedded system that employs software to determine the required throttle position by calculations from data measured by other sensors, including the accelerator pedal position sensors, engine speed sensor, vehicle speed sensor, and cruise control switches.
The car will maintain the speed the driver sets until the driver hits the brake pedal, clutch pedal, or disengages the system. [37] Specific cruise control systems can accelerate or decelerate, but require the driver to click a button and notify the car of the goal speed. [37] ESC control light
[23] [59] This usually takes the form of one green light on the dashboard on cars from the 1950s or older, or two green indicator lights on cars from the 1960s to the present, and a rhythmic ticking sound generated electromechanically or electronically by the flasher. It is also required that the vehicle operator be alerted by much faster- or ...