Characteristic curve and setpoint values
WARNING: This page does not describe the selected car, but rather 45 other vehicles, including the 2016 BMW M5, 2016 BMW 550i xDrive, 2016 BMW 550i, 2016 BMW 535i xDrive, and 2016 BMW 535i. However, it is still accessible from the selected car via links, so may be relevant.
The knock sensor shows linear characteristics in the frequency range up to around 20 kHz. The resonance frequency of the sensor itself lies at a significantly higher frequency (greater than 30 kHz). The knocking noises that usually occur in the engine have frequencies of around 7 kHz.
| Index | Explanation |
|---|---|
| 1 | Voltage |
| 2 | Signal without knocking |
| 3 | Signal with knocking |
| 4 | Frequency |
Observe the following setpoint values for the crankshaft sensor:
| Size | Value |
|---|---|
| Voltage range | 4.5 to 5.5 volts |
| Frequency range | 7 to 25 kHz |
| Maximum output current | 20 mA |
| Ambient temperature | -40 °C to 140 °C |