Fuel injection pump
AssigneeRobert Bosch GmbH
InventorFranz Eheim
Life of this patent
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Abstract
A fuel injection pump for internal combustion engines has a single rotating and reciprocating piston which alternately aspirates fuel from a fuel storage compartment and delivers it under pressure to one of several injection lines. Fuel aspiration takes place through a plurality of fuel channels which terminate in the wall of the pump cylinder and whose termini are opened by appropriate grooves in the piston surface. The individual fuel channels are in mutual communication via one or more connection channels and are also connected to the fuel storage compartment via a suction conduit.
Claims5
In a fuel injection pump for internal combustion engines which includes a housing, a fuel storage compartment in said housing, cylinder means disposed in said housing and a reciprocating and rotating piston moving in said cylinder means and defining a pressure chamber, a plurality of fuel channels in said housing, one terminus of each of said plurality of fuel channels lying in the wall of said cylinder, said piston having radial apertures which cooperate with said termini to thereby provide rpm-dependent flow control through said plurality of fuel channels, the improvement comprising
- at least one connection channel in the cylinder means connected to said plurality to fuel channels for providing mutual fluid communication between at least two of said plurality of fuel channels, and a suction conduit connected between said mutually communicating fuel channels and said fuel storage compartment.
Dependencies are inferred from the claim text.