Reverse rotation intake manifold protection system and method
AssigneeGM Global Technology Operations LLC
InventorsEric Holm, Jason Davis
Life of this patent
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Abstract
A method of protecting an intake manifold of an engine of a hybrid propulsion system including an electric motor comprises detecting a reverse rotation of an engine. A fuel injector of the engine that is rotating in reverse is commanded to cease operation. A spark plug of the engine that is rotating in reverse is commanded to cease operation. The ceasing of reverse rotation of the engine is then confirmed.
Claims22
A method of protecting an intake manifold of an engine of a hybrid propulsion system including an electric motor, comprising:
- detecting a reverse rotation of an engine;
- commanding a fuel injector of said engine that is rotating in reverse to cease operation;
- commanding a spark plug of said engine that is rotating in reverse to cease operation;
- and
- confirming reverse rotation of said engine has ceased.
An intake manifold protection system for a hybrid propulsion system with an internal combustion engine and an electric motor, comprising:
- a fuel injector that supplies fuel to a cylinder of an engine;
- a spark plug that that provides spark to said cylinder of said engine;
- a control module that determines when said engine is rotating in reverse and that commands said fuel injector and said spark plug off when said engine is rotating in reverse.
An intake manifold protection system for a hybrid propulsion system including an engine that operates in a reverse rotational direction and an electric motor, comprising:
- a cam sensor coupled to an engine that generates a cam sensor signal;
- a crankshaft sensor coupled to said engine that generates a crankshaft sensor signal;
- and
- a control module that receives said cam sensor signal and said crankshaft sensor signal and that detects when said engine is operating in a reverse rotational direction based on said cam sensor signal and said crankshaft sensor signal and that sends a cease operation command when said engine is operating in said reverse rotational direction.
Dependencies are inferred from the claim text.