Engine fuel pump and method for operation thereof
AssigneeFord Global Technologies, LLC
InventorsPatrick Brostrom, Vince Paul Solferino, Paul Zeng
Life of this patent
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Abstract
A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine is provided. The method includes, during a first mode, adjusting a magnetic solenoid valve (MSV) to control pump outlet pressure and during a second mode, deactivating the MSV and controlling pump outlet pressure via a noise-reducing valve assembly on an inlet side of the fuel pump.
Claims19
A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine, comprising:
- during a first mode, adjusting a magnetic solenoid valve (MSV) to control pump outlet pressure;
- and
- during a second mode, deactivating the MSV and controlling pump outlet pressure via a noise-reducing valve assembly on an inlet side of the fuel pump, where the noise-reducing valve assembly includes a spool valve and a reed valve.
A fuel pump comprising:
- a magnetic solenoid valve (MSV) positioned on an inlet side of the fuel pump controlling a pump outlet pressure during a first mode;
- and
- a noise-reducing valve assembly positioned on an inlet side of the fuel pump selectively controlling a pump outlet pressure during a second mode, where the noise-reducing valve assembly includes a spool valve and a reed valve.
A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine, comprising
- when the engine is above a threshold speed, adjusting a magnetic solenoid valve (MSV) to control pump outlet pressure;
- and
- when the engine is below the threshold speed, deactivating the MSV and controlling an inflow and outflow of a pump chamber via a noise-reducing valve assembly on an inlet side of the fuel pump, where the noise-reducing valve assembly includes a spool valve and a reed valve.
Dependencies are inferred from the claim text.