Electronic Stability Control: At higher speeds, by monitoring VSS, WSS, g-force, and yaw rate sensors, ETC can modulate engine power output to improve vehicle stability.Traction Control: Using other sensor inputs, such as VSS, individual WSS (wheel speed sensor), and shift position, ETC can modulate engine output to reduce wheel spin, such as when accelerating on low-traction surfaces, such as snow, ice, or gravel.Adaptive cruise control adds additional sensor inputs, such as from RADAR, LIDAR, or SONAR systems. Cruise Control: Modern electronic throttle control systems control vehicle speed electronically, with additional programming inputs from VSS ( vehicle speed sensor), shift position, and set speed.Some vehicles with ETC don’t use an idle air control (IAC) valve or idle-up vacuum switch, but control engine idle speed using the ETB. Idle Air Control: Engine idle speed needs to be adjusted to account for engine load and temperature.Today, electronic throttle control function is more complex and functional, with several benefits to such ETC integration and programming. Basically, when the driver depresses the accelerator 25%, the ETC opens the ETB to 25%, and when the driver releases the accelerator, ETC closes the ETB. Īt its simplest, the ETC module reads input from the APS and transmits servomotor instructions to the throttle body. Real-time TPS data confirms actual throttle position for the ETC module.Īccelerator Pedal Actually has Less Effect on Engine Speed than Most Think. It is fitted with an electronic servomotor or stepper motor and a throttle position sensor (TPS) instead of cables.
Practically all modern vehicles have integrated electronic throttle control into the engine control modules (ECM), simplifying installation, programming, and diagnosis.Īn electronic throttle body looks like a typical throttle body. When electronic throttle control first appeared, it was accompanied by its own ETC module. The throttle cable has been replaced by the accelerator position sensor (APS), which detects the exact position of the pedal at any given moment, transmitting this signal to the ETC module.
The accelerator pedal looks the same as it always has, but its interaction with the throttle body has changed. The electronic throttle control system includes the accelerator pedal, ETC module, and throttle body. No Cables Drive the Electronic Throttle Body, but an Electronic Stepper Motor and Gears (Green).
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