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US 9,002,627 B2Granted
Method and system for improving engine starting
AssigneeFord Global Technologies, LLC
InventorsThomas G. Leone, Ralph Wayne Cunningham
Life of this patent
Estimating the term…
Abstract
An engine system and method for improving engine starting are disclosed. In one example, engine port throttles are adjusted differently during automatic and operator initiated engine starts. The system and method may improve engine torque control during an engine start.
Claims18
A method of starting an engine, comprising:
- positioning an air inlet throttle for an engine start;
- during an operator directed engine start, positioning a port throttle in a first position, the port throttle positioned downstream of the air inlet throttle in an air intake system of the engine;
- and
- positioning the port throttle in a second position during an automatic engine start, the automatic engine start not requested directly by an operator, the port throttle opened further during the operator directed start than during the automatic engine start.
1 more element
A method of starting an engine, comprising:
- positioning a first port throttle directing air to a first cylinder in a first position during an operator directed engine start;
- and
- positioning the first port throttle in a second position during an automatic engine start, the automatic engine start not an operator directed engine start, the first port throttle further positioned in response to a presently engaged gear ratio of a transmission.
A system for controlling an engine, comprising:
- an engine air intake throttle located along an engine air intake passage;
- a first engine cylinder port throttle located along the engine air intake passage downstream of the engine air intake throttle;
- and
- a controller including instructions for adjusting a position of the first engine cylinder port throttle to a first position during an operator directed engine start, the controller also including instructions for adjusting the position of the first engine cylinder port throttle to a second position during an automatic engine start, the automatic engine start not directly requested via an operator, the controller including further instructions for adjusting the position of the first engine cylinder port throttle in response to a presently engaged transmission gear.
1 more element
Dependencies are inferred from the claim text.