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US 7,841,319 B2Granted
Method of detecting and compensating for injector variability with a direct injection system
AssigneeFord Global Technologies, LLC
InventorJoseph Lyle Thomas
Life of this patent
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Abstract
A method for controlling an injection of fuel to an engine is described. In one example, the different fuels are injected to an engine during different engine operating conditions. The method may improve engine starting and reduce engine emissions.
Claims20
A method for controlling fuel injection, comprising:
- operating a fuel pump to pressurize fuel in a fuel reserve;
- increasing output of said fuel pump to increase a fuel pressure in said fuel reserve;
- deactivating said fuel pump after increasing said fuel pressure in said fuel reserve;
- commanding an equivalent amount of injected fuel from each fuel injector of an engine, the equivalent amount of injected fuel provided from said fuel reserve to the engine;
- and
- individually uniquely correcting amounts of fuel injected from each fuel injector to said engine in response to a pressure drop at said fuel reserve.
3 more elements
A method for controlling fuel injection, comprising:
- operating a fuel pump to provide a first fuel pressure in a fuel reserve;
- increasing output of said fuel pump to provide a second fuel pressure in said fuel reserve, said second fuel pressure greater than said first fuel pressure, said second fuel pressure related to a number of fuel injections;
- deactivating said fuel pump after providing said second fuel pressure in said fuel reserve;
- injecting fuel from said fuel reserve to an engine via a fuel injector;
- and
- correcting an amount of fuel injected to said engine by the fuel injector in response to a sum of a plurality of pressure drops produced by the fuel injector at said fuel reserve.
3 more elements
A method for controlling fuel injection, comprising:
- operating a fuel pump to pressurize fuel in a fuel reserve;
- increasing output of said fuel pump to increase a fuel pressure in said fuel reserve;
- deactivating said fuel pump after increasing said fuel pressure in said fuel reserve;
- injecting fuel from said fuel reserve to an engine via a fuel injector in a predetermined sequence for a predetermined number of times;
- and
- correcting an amount of fuel injected to said engine by the fuel injector in response to an average of a sum of a plurality of pressure drops produced by the fuel injector at said fuel reserve.
3 more elements
Dependencies are inferred from the claim text.