Patent ID: 6345604
Filing Date: 2002-02-12
Classification: F02D

Abstract:
A throttle controller for an internal combustion engine having a throttle body including an adjustable throttle valve in an intake air passage;a throttle valve actuator motor connected to the throttle valve for activating the throttle valve between a closed position and a full-open position; a throttle position sensor connected to the throttle valve for developing a position signal indicating the actual throttle valve position; an ignition switch for initiating engine startup and engine shutdown and for developing an engine shutdown signal; an accelerator pedal and an accelerator position sensor for developing an actual accelerator pedal position signal; and an electronic microprocessor comprising an input signal conditioning circuit receiving the engine shutdown signal, the electronic microprocessor including means for developing a throttle valve actuator motor control signal responsive to the presence of an engine shutdown signal whereby the throttle valve actuator motor adjusts the throttle plate to a throttle plate position between the closed position and the fully open position to prevent throttle plate freezing when the engine is shut down.