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US 9,347,390 B2Granted
Engine de-choking in response to an engine flood event
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Michael Damian Czekala, Michael Howard Shelby
Life of this patent
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Abstract
A method may comprise automatically de-choking an engine and cranking the engine in response to an engine flood event, wherein automatically de-choking the engine comprises automatically cutting fuel to the engine while opening an air intake throttle.
Claims14
A method, comprising:
- automatically de-choking a non-carbureted engine, including automatically cutting fuel to the engine while increasing an air intake throttle opening, and cranking the engine in response to detecting an engine flood event, the engine flood event detected based on an amount of fuel delivered to the engine during engine start attempts.
A method of automatically de-choking an engine, comprising:
- cutting fuel to engine fuel injectors;
- increasing an opening of an intake air throttle;
- cranking the engine for an extended cranking duration;
- and
- adjusting an air-fuel ratio to a de-choking air-fuel ratio, wherein automatically de-choking the engine is performed in response to detecting an engine flood event including detecting an engine stall event.
2 more elements
A method of automatically de-choking an engine, comprising:
- in response to an engine flooding event based on a total amount of fuel delivered during a start being greater than a threshold:
- cutting fuel to engine fuel injectors;
- increasing an opening of an intake air throttle;
- cranking the engine for a first extended cranking duration;
- and
- adjusting an air-fuel ratio to a de-choking lean air-fuel ratio;
- and
- in response to an engine stall event based on an abrupt ceasing of engine operation when a transmission is not engaged in park or neutral:
- cutting fuel to engine fuel injectors;
- increasing the opening of the intake air throttle;
- cranking the engine for a second extended cranking duration longer than the first extended cranking duration;
- and
- adjusting the air-fuel ratio,
- wherein automatically de-choking the engine is performed in response to detecting the engine flood event.
11 more elements
Dependencies are inferred from the claim text.