Intake manifold refill and holding control systems and methods

摘要

An engine control system for an auto-stop/start vehicle includes an auto-stop/start module and an actuator control module. The auto-stop/start module selectively generates an auto-stop command for shutting down an engine while an ignition is in an ON state. The actuator control module disables fuel to the engine when the auto-stop command is generated and closes a throttle valve to a predetermined throttle opening when the auto-stop command is generated.

主权项

1. An engine control system for an auto-stop/start vehicle, comprising:
an auto-stop/start module that selectively generates an auto-stop command for shutting down an engine while an ignition is in an ON state and that selectively generates an auto-start command for re-starting the engine after the generation of the auto-stop command; and an actuator control module that, in response to the generation of the auto-stop command and before the generation of the auto-start command:
disables fuel to the engine;closes a throttle valve to a predetermined idle throttle opening;maintains the throttle valve at the predetermined idle throttle opening until an engine speed is less than a predetermined speed;selectively opens the throttle valve with respect to the predetermined idle throttle opening when the engine speed is less than the predetermined speed; andcloses the throttle valve to a fully closed position when a manifold absolute pressure (MAP) exceeds a predetermined pressure while the throttle valve is open with respect to the predetermined idle throttle opening.