METHOD FOR OPERATING A DIRECT FUEL INJECTOR
First Claim
Patent Images
1. A method, comprising:
- operating an engine cylinder with fuel from a first port injector and not a second direct injector; and
activating the second direct injector in response to a rail pressure increase of a fuel rail, the fuel rail coupled to the second injector.
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Abstract
A method, comprising: operating an engine cylinder with fuel from a first injector and not a second injector and activating the second injector in response to a rail pressure increase of a fuel rail, the fuel rail coupled to the second injector. In this way, degradation of the second injector may be reduced by activating the second injector and allowing fuel flow through the second injector to reduce the pressure and temperature of the fuel rail.
14 Citations
19 Claims
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1. A method, comprising:
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operating an engine cylinder with fuel from a first port injector and not a second direct injector; and activating the second direct injector in response to a rail pressure increase of a fuel rail, the fuel rail coupled to the second injector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for an internal combustion engine, comprising:
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a boosting device coupled to a group of cylinders; a group of direct fuel injectors in communication with the group of cylinders; a group of port fuel injectors in communication with the group of cylinders; a first fuel rail in communication with the group of direct injectors; a higher-pressure fuel pump in communication with the first fuel rail; and a control system configured with instructions for;
increasing a flow of fuel through the first fuel rail when a temperature change in a fuel included in the first fuel rail exceeds a threshold, the temperature change based on a rail pressure change. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method, comprising:
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operating an engine cylinder with fuel from a first port injector and not a second direct injector; and activating a fuel pump coupled to the second direct injector in response to a rail pressure increase of a fuel rail, the fuel rail coupled between the second direct injector and the pump. - View Dependent Claims (19)
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Specification