Importance

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Abstract

A fuel injection pump of a distributor type for internal combustion engines including, a pump plunger guided within a pump cylinder, which forms a pump chamber and which is driven to perform reciprocating and rotating motion by a driving gear which is submerged in a lubricating oil bath. The pump plunger has a distribution hole which is in contact with the pump chamber and which sequentially links this chamber, during the compression stroke of the pump plunger, to injection jets. The fuel filling of the pump chamber takes place via a magnetically operated valve, which is open during the intake stroke and closed during the compression stroke of the pump plunger. For an enlargement of the filling cross-section during the intake stroke without an enlargement of the opening of the magnetically operated valve, a relief hole in the pump plunger is used which serves a force balancing during the compression stroke and which during the intake stroke links up with a filling hole which is connected with a membrane reservoir.

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First Claim