Electronic accelerator pedal (the 3.0l ASN engine is shown as an example). In the accelerator pedal module (arrow) there are two accelerator pedal position senders: G79 and G185.
The position of the accelerator pedal, which is determined by the driver, is the main input to the control device. Throttle valve driven by an electric motor (throttle position controller), which is located in the throttle control device. The control is performed in the entire range of loads and speeds. The damper is driven by the regulator in accordance with the signal from the master, which is the engine control device.
The principle of the device of the electronic accelerator pedal
With the engine off and the ignition on, the control electronics control the throttle position in exact accordance with the signals from the accelerator pedal position sensor. In this case, if the accelerator pedal is depressed at half the full travel of the pedal, then the throttle valve also opens approximately half way. On the contrary, when the engine is running, i.e. under load, the control device can open and close the throttle independently of the throttle position sensor. In this way, adaptation to the corresponding operating mode is carried out. So, during acceleration, the throttle valve can be fully opened, although the accelerator pedal is only half pressed. This avoids throttling losses.
As a result, noticeably better values are achieved in terms of emissions and fuel consumption under certain loads. The control unit generates the corresponding torque by means of an optimal ratio of throttle valve cross-section and boost pressure.
The electronic accelerator pedal also intervenes in the process of regulating the traction of the drive wheels. If the driver accelerates too much, then the control device can reduce the gas supply until all wheel spin stops. In the presence of an electronic carcass of the accelerator, there is also no need for additional stabilization of idling. The idle speed is controlled automatically by the throttle valve. As you probably already guess, it is impossible to repair the electronic accelerator pedal on your own without special diagnostic tools, because now we are not talking about some simple unit that consists of a couple of parts. The electronic engine power control system is a system that includes all the parts that help determine, regulate and control the position of the throttle.
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