ENGINE FUEL PUMP AND METHOD FOR OPERATION THEREOF
First Claim
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1. 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.
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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.
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Citations
20 Claims
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1. A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fuel pump comprising:
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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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. 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. - View Dependent Claims (19, 20)
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Specification