Throttle position sensor: characteristic, principle of operation

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

The throttle position sensor (TPS) occupies a very important place in the system, which monitors the received dose of fuel. At her signal, the controller starts its work, which includes determining the position of the damper. By how high the rate of change of the signal, the dynamics of pedal pressure is monitored, and this is the main factor determining the required dose of fuel. In the mode in which the engine is started, the damper deflection angle is monitored. And if it is 75 percent open or more, motor purge mode is activated. The signal given by the throttle position sensor is the starting signal. It is after him that the controller begins to control the RHC (idle speed controller). This is how air is supplied to the engine.

It is worth noting that the throttle position sensor has another name. This is a mechanism of the so-called potentiometric type, which includes resistors (fixed and variable). Their total resistance is approximately 8 kOhm.

The signal indicating the position of the damper is fed through a resistor to the controller. This signal has a value that is slightly less than 0.7 V. If the voltage is more than 4 V, then the control unit will consider that the damper is completely open. The throttle position sensor is usually mounted on its body and connected to the axis of rotation. The axis has a special groove, which is part of the cruciform socket. Actually, TPS is fixed with two screws.

Not to mention the non-contact throttle position sensor. Its purpose is to generate a DC voltage whose data is proportional to the opening angle of this damper, as well as to the fuel injection system in the engine. The rotation shaft is directed clockwise. This mechanism is fixed on a special pipe (throttle) of the fuel injection system. There, of course, everything is provided for the implementation of this installation. I would like to note that the resource of this product cannot be limited to car mileage.

And one more topic that I would like to touch on is the VAZ throttle position sensor. On older machines, as you know, the installed mechanisms require increased attention. And often the TPS falls into disrepair. So, this mechanism is faulty if:

1. Problems occur at idle.
2. Gear out - car engine stalls.
3. Jerks appear when typingspeed.
4. Idling speed "floats" in almost all modes in which the engine operates.

In order to make sure that the TPS does not work, you need to check it, and this is quite simple. It is necessary to turn on the ignition, and then measure the voltage between the output of the slider and the "ground". If the voltmeter reads 0.7 V or less, then everything is normal.