Patent ID: 6315531
Filing Date: 2001-11-13
Classification: F02M

Abstract:
Jerk pump for an internal combustion engine, comprising:an integral solenoid valve in which a PUMP plunger driven by a cam delivers fuel under high pressure through a channel that extends in a pump housing and through an injection line to an injection nozzle, an armature of the solenoid valve cooperating with a spring-loaded valve piston by which a channel-guiding high-pressure side can be connected with a low-pressure side,a spring plate secured to the piston shaft of the valve piston, anda compression spring operating to open the valve and abutting said spring plate with one spring end, while the other spring end abuts a closing part on the pump housing,wherein an energy absorbent body associated with the valve piston is held in a resting position by spring force, said absorbent body, upon energizing of a solenoid coil, striking a stop body that is in an operating connection with the valve piston when the valve piston is on a valve seat,wherein the stop body is permanently connected with the armature and the absorbent body is mounted displaceably lengthwise on the piston shaft and is located between the stop body and the spring plate, andwherein a further spring presses the absorbent body against the spring plate.