| 摘要 |
A pressure regulating valve for regulating the pressure in a common rail, having a pistonlike valve member guided axially displaceably in a bore, which valve member acts in the closing direction on a closing element and presses it against a valve seat, and the valve member forms an armature of an electromagnet that can be supplied with electric current. The valve is additionally equipped with a mechanical spring, which likewise presses the valve member in the direction of the valve seat, and whose spring constant is designed such that the valve cannot be opened until beyond a predetermined minimum fuel pressure of greater than or equal to 250 bar. In this way, even in the event that the electromagnetic closing force should fail, a minimum pressure at the valve outlet is generated and thus an injection event is made possible.
|
