The knock sensor VAZ-2110 can be safely attributed to the category of the most reliable elements in the entire car. Despite its small dimensions, it performs a very important function, giving the controller indications of the current detonation knocks in the engine. Based on the data obtained, the latter performs adjustment of the ignition timing to suppress detonation.
Resonant knock sensor VAZ-2110
This type of mechanism refers to the type of piezoelectric. It is located on the power unit. In the event of detonation explosions in the engine, the sensor generates an alternating current signal , in which the magnitudes of the amplitude and frequency directly depend on the level of detonation that has occurred. At the input of the knock sensor, a reference voltage from the controller of 5V is supplied. Inside the measuring element is a resistor with a resistance of 330-450 Ohms, which lowers the input voltage to 2.5V. If detonation does not occur (in normal operation of the power unit), then the output voltage remains equal to 2.5V. Otherwise, the sensor generates an AC signal supplied to the controller via the 5V reference signal circuit. The thing is that the input signal is a DC voltage, while the reverse is an AC voltage. The amplitude and frequency of the signal coming from the sensor depend on the level of detonation explosions in the car engine. The controller reads the received data and, on the basis of this, performs adjustment of the ignition timing in order to extinguish the detonation.
VAZ-2110 Broadband Knock Sensor
As well as resonant, this type of mechanism refers to the type of piezoelectric and is located directly on the engine itself. When the power unit is operating, the sensor generates a signal in the form of an alternating current voltage, the magnitude of the amplitude and frequency of which depends on the same indicators of engine vibration. If detonation occurs in the power unit, the amplitude of the vibrations of a specific frequency increases, resulting in an increase in the amplitude of the output from the signal sensor. He goes to the controller, which, based on the data obtained, makes adjustments to the ignition timing, thereby aligning the engine.
As mentioned earlier, the mechanism under consideration is quite reliable. Therefore, if there is a suspicion of its incorrect functioning, you should first check the break of the knock sensor VAZ-2110. Those. examine its contacts and wires for integrity. It is highly likely that the reason for incorrect operation lies precisely here. If the inspection did not reveal any malfunctions, it remains only to replace the mechanism with a new one. Otherwise, the engine will continue to run unstably. Perhaps increased fuel consumption on the VAZ-2110.
Knock Sensor Replacement
- The first step is to de-energize the system. To do this, just disconnect the wire from the negative terminal of the battery.
- Next, you need to disconnect the wiring block from the sensor contacts.
- To remove the mechanism, unscrew the fastening nut.
- Install the VAZ-2110 knock sensor in the reverse order.