High-pressure fuel pump with variable delivery quantity
AssigneeRobert Bosch GmbH
InventorsHelmut Rembold, Bruno Schmidt, Dietmar Krieg, Mathias Schumacher, Uwe Mueller
Life of this patent
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Abstract
A high-pressure fuel pump which is suitable above all for use in internal combustion engines with direct gasoline injection, in which the pressure surge upon opening of a check valve between the high-pressure line and the pumping chamber of the fuel feed pump is limited by structural provisions.
Claims15
A high-pressure fuel pump with a variable delivery quantity for an internal combustion engine, comprising a piston (10) actuated by a camshaft (12) having a plurality of cams (13) therein, wherein the piston (10) aspirates fuel from a low-pressure line (15) into a pumping chamber (14) and then pumps it into a high-pressure line (16), and a quantity control valve (19) connecting the pumping chamber (14) and the low-pressure line (15), and a separate suction valve (18) disposed between the low-pressure line (15) and the pumping chamber (14), a separate suction valve (18) is disposed, the regulation of the delivery quantity being effected by opening the quantity control valve (19) during the pumping stroke of the piston.
Dependencies are inferred from the claim text.