Fuel Supply System, Especially For an Internal Combustion Engine
AssigneeRobert Bosch GmbH
InventorBernd Schroeder
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Abstract
A fuel supply system comprises a piston pump having a working chamber and an adjustable throttle device, arranged upstream of the working chamber and adapted to modify the flow of fuel supplied to the working chamber. The invention is characterized in that the throttle device, in the closed position, allows a leakage volume to arrive at the working chamber. The piston pump comprises a leakage pump device which supplies at least a part of the leakage volume from the working chamber to a low-pressure zone located upstream of the throttle device.
Claims21
1-12. (canceled)
In a filet supply system for an internal combustion engine, the system comprising a piston pump with a work chamber, and an adjustable throttle device disposed upstream of the work chamber and which can vary the inflow of fuel to the work chamber, the improvement wherein the throttle device, in the closed state, allows a leakage quantity to reach the work chamber;
- and piston pump includes a leakage pump device which pumps the leakage quantity at least in part out of the work chamber to a low-pressure region located upstream of the throttle device.
Dependencies are inferred from the claim text.