Patent ID: 7603984
Filing Date: 2009-10-20
Classification: F02M

Abstract:
1. An accumulator injection system for the intermittent injection of high-pressure fuel into combustion spaces of an internal combustion engine, with a high-pressure conveying device which feeds high-pressure fuel to a number of injection units having in each case an injection valve, a discrete accumulator chamber assigned to each injection valve and a throttling device, the injection units being connected to one another and to the high-pressure conveying device by means of hydraulic line means, and each injection valve having an injection valve member, actuated by means of an actuator arrangement and a hydraulic control device, for controlling the operation of injecting high-pressure fuel through nozzle injection orifices of a nozzle of the injection valve, wherein the hydraulic line means have too low an accumulator action to ensure the required, reproducibly identical injection operations of the injection valves, and the throttling device permits, at least approximately unimpeded, the flow of the high-pressure fuel in the direction of the injection valve and throttles said flow in the opposite direction, in such a way that high-pressure fuel flows to each injection valve during its injection operation both from the assigned accumulator chamber and from the accumulator chamber of other injection units and from the high-pressure conveying device.