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US 2015/0083075 A1Published application
System and method for compensating cetane
AssigneeFord Global Technologies, LLC
InventorsEric Kurtz, Douglas Kuhel
Life of this patent
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Abstract
Methods and systems for adjusting a plurality of fuel injections supplied to a cylinder during a cycle of the cylinder are described. In one example, fuel amounts are moved between fuel injections in response to combustion phase. Engine feedgas hydrocarbons and/or carbonaceous particulate matter may be reduced when cetane of combusted fuel changes.
Claims13
A method for operating an engine, comprising:
- injecting fuel in at least two fuel injection events during a cycle of a cylinder;
- and
- adjusting fuel amounts and a number of fuel injections between the at least two fuel injection events in response to a combustion phase of the engine, including increasing the number as a cetane of the fuel is lowered.
An engine system, comprising:
- a compression ignition engine including a combustion chamber;
- a fuel injector directly injecting fuel into the combustion chamber;
- and
- a control system including a computer program stored in a non-transitory medium including executable instructions to adjust fuel amounts between a plurality of fuel injections delivered to a cylinder via the fuel injector, the fuel amounts between the plurality of fuel injections occurring during a cycle of the cylinder in response at least to a combustion phase of the cylinder, and instructions including limiting an amount of fuel transferred from a second fuel injection to a first fuel injection in response to the second fuel injection reaching a minimum fuel injection pulse width, the first fuel injection and the second fuel injection included in the plurality of fuel injections.
1 more element
Dependencies are inferred from the claim text.