Speed control method
AssigneeFord Global Technologies, LLC
InventorsJohn David Russell, Brian D. Rutkowski
Life of this patent
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Abstract
A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that is faster than possible by using an inlet device alone. In other words, the method of the present invention controls cylinder air charge faster than manifold dynamics by coordination of the inlet and outlet device. This improved control is used to improve various engine control functions.
Claims19
A method for controlling speed of an engine having at least one cylinder, the engine also having an intake manifold and an outlet control device for controlling flow from the intake manifold into the cylinder, comprising:
- generating a desired engine speed;
- and
- changing the outlet control device to control the engine speed to said desired engine speed.
A method for controlling speed of an engine having at least one cylinder, the engine also having an intake manifold and an outlet control device for controlling flow from the intake manifold into the cylinder and an inlet control device for controlling flow into the intake manifold, comprising:
- generating a desired engine speed;
- and
- changing both the outlet control device and the inlet control device based on the engine speed and said desired engine speed and in response to a respective outlet control device command and an inlet control device command.
An article of manufacture comprising:
- a computer storage medium having a computer program encoded therein for controlling an engine speed, the engine having at least one cylinder, the engine also having an intake manifold and an outlet control device for controlling flow from the intake manifold into the cylinder, said computer storage medium comprising:
- code for generating a desired engine speed;
- and
- code for adjusting the outlet control device to control the engine speed to said desired engine speed.
Dependencies are inferred from the claim text.