Control method for internal combustion engine
AssigneeFord Global Technologies, LLC
InventorJohn D. Russell
Life of this patent
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Abstract
A control method adjusts fuel injection into an engine having a variable compression ratio. The method determines the cylinder air amount based on various sensors and the current compression ratio. The disclosed fuel injection method can perform both open loop and closed loop control. A method is also disclosed for putting the compression ratio to a base value during engine shutdown so that subsequent engine starts occur with a consistent compression ratio.
Claims9
A method for controlling an internal combustion engine having a variable compression ratio mechanism for varying compression ratio of the engine cylinders, the method comprising:
- indicating degradation of the variable compression ratio mechanism based on an operating condition;
- and
- in response to said indication, adjusting a fuel injection amount based on said indication.
A system for controlling an internal combustion engine, the engine having a crankshaft coupled to connecting rods of cylinders in the engine, the system comprising:
- a variable compression ratio means for varying compression ratio of at least an engine cylinder, said compression ratio means coupled to a crank-shaft end of a connecting rod for said engine cylinder;
- and
- a controller for detecting degradation of the variable compression ratio mechanism based on an operating condition, and in response to said detected degradation, adjusting at least one of a fuel injection amount and an ignition timing based on said indication.
A system for controlling an internal combustion engine, the engine having a crankshaft coupled to connecting rods of cylinders in the engine, the system comprising:
- a variable compression ratio means for varying compression ratio of at least an engine cylinder, said compression ratio means coupled to a crank-shaft end of a connecting rod for said engine cylinder;
- and
- a controller for detecting degradation of the variable compression ratio mechanism based on an operating condition, and in response to said detected degradation, adjusting a fuel injection amount and an ignition timing based on said indication.
Dependencies are inferred from the claim text.