Rail pressure sensor
The rail pressure sensor is built into the stainless steel rail. Fuel is stored under pressure temporarily in the rail, then distributed to the injectors. The fuel pressure in the rail is measured by a silicon element on a metal membrane. The rail pressure sensor supplies a proportional voltage across the entire measuring range.
The rail pressure sensor is supplied with a voltage of 5 volts and ground by the DME. The signal for evaluation fluctuates depending on the pressure. The measuring range of approx. 0.5 to 4.6 volts corresponds to a rail pressure of between 0 bar and 250 bar.
| Index | Explanation |
|---|---|
| 1 | Rail |
| 2 | Rail pressure sensor |
| 3 | 3-pin plug connection |
If the rail-pressure sensor fails, the quantity control valve is activated in emergency operation by the DME.