8R0941285E is the Reference number of height sensors,and the supplier is vika. The detailed information of 8R0941285E is as follows:
Applicable models of 8R0941285E
Purposes of height sensors:
1. Height sensors are used for the air suspension and active suspension in a car for detection of height of the vehicle body (vertical displacement of the vehicle body relative to the lower swing arm or the lower support of the shock absorber).
These sensors are typically of photoelectric type. The main structure of a height sensor is installed on the vehicle body. By controlling a connecting rod, it changes the up/down movement of the suspension into rotary movement of magnetic disc slots, derives the vehicle height from the change in output of a light chopper, and then converts the height into an electric signal and feeds it to a control device;
2. The sensor contains a sensor shaft that can rotate in response to the movement of the connecting rod. A disc with many narrow slots is fixed on the sensor shaft.
The light chopper consists of an LED and a photosensitive diode transistor. Rotation of the disc enables the output of the light chopper to be switched ON/OFF. Such ON/OFF signal is transmitted via a signal line to the electronic suspension control device.
By means of such switching operations, the electronic control device is able to measure rotation angle of the disc. A change in the height of the vehicle body and the resulting change in suspension deformation will cause the sensor shaft to drive rotation of the disc, thus allowing the electronic control device to measure vehicle body height variation;
3. In practice, a height sensor is fixed on a car frame, and the external end of the sensor shaft joins a guiding rod. The other end of the guiding rod is connected via a connecting rod to the lower swing arm of an independent suspension.