Fuel delivery pump for a fuel injection pump for internal combustion engines
AssigneeRobert Bosch GmbH
InventorsStanislaw Bodzak, Hanspeter Mayer
Life of this patent
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Abstract
A fuel delivery pump for a fuel injection pump for internal combustion engines, including a pair of gears that mesh with each other and are driven to rotate in a pump chamber. The pair of gears deliver fuel from an intake chamber connected to a storage tank, along a supply conduit that is formed between the end face of the gears and the circumference wall of the pump chamber, into a pressure chamber connected to the fuel injection pump. A conduit is provided that connects the intake chamber to the pressure chamber. The conduit can be connected to a ventilation device, and that upstream and downstream of the ventilation device, a pressure valve is provided for a directed fuel flow in the conduit.
Claims17
A fuel delivery pump in combination with a fuel injection pump for internal combustion engines, comprising a pair of gears (7, 9) that mesh with each other and are driven to rotate in a pump chamber (3), said gears (7, 9) deliver fuel from an intake chamber (13) connected to a storage tank, along a supply conduit (17) that is formed between an end face of the gears (7, 9) and a circumference wall of the pump chamber (3), into a pressure chamber (15) connected to the fuel injection pump, a conduit (26) is provided that connects the intake chamber (13) with the pressure chamber (15), said conduit correctable connected to a ventilation device (28), and that upstream and downstream of the ventilation device (28), a pressure valve (33, 38) is provided for a directed flow in the conduit (26).
Dependencies are inferred from the claim text.