Patent ID: 6092505
Filing Date: 2000-07-25
Classification: F02D

Abstract:
An engine controlling apparatus for an automotive vehicle, comprising:an engine mounted on the vehicle and composed of a plurality of cylinders;a variety of sensors for detecting an operational condition of said engine;an engine controlling means for controlling said engine in response to the operational condition;a throttle valve for adjusting an amount of intake air to be fed to said engine;a throttle actuator for driving said throttle valve;a throttle opening degree sensor for detecting an open/closed position of said throttle valve as a throttle opening degree;a bypass passage for feeding air to said engine through a bypass around said throttle valve;a bypass valve for opening/closing said bypass passage;a bypass controlling means for controlling said bypass valve;an accelerator opening degree sensor for detecting an operational position of an accelerator pedal as an accelerator opening degree;a throttle controlling means for controlling said throttle actuator in response to said accelerator opening degree;a breakdown detecting means for detecting a break down in a throttle controlling system including said throttle valve and said throttle opening degree sensor;a throttle power source interrupting means for interrupting a power source supply to said throttle actuator in the case where the breakdown in the throttle controlling system is detected; anda predetermined operational condition detecting means for detecting a shift of said operational condition to a predetermined operational condition corresponding to a fully closed condition of said throttle valve in operation of said throttle power source interrupting means;wherein said bypass controlling means opens said bypass valve to thereby feed the air to said engine at the time when the predetermined operational condition is detected in operation of said throttle power source interrupting means.