Patent ID: 6032519
Filing Date: 2000-03-07
Classification: F02D

Abstract:
A throttle opening degree detection apparatus comprising:a throttle valve of an engine;idle-up means for directly changing an opening degree of said throttle valve;a throttle sensor outputting a signal according to the opening degree of said throttle valve;full close condition detecting means for detecting whether said throttle valve is put in a full close condition without using the signal of said throttle sensor;first learning means for learning a full close reference value on the basis of the signal of said throttle sensor when said full close condition means decides that said throttle valve is put in the full close condition;second learning means for setting a minimum value of the signals of said throttle sensor obtained within a period that said idle-up means opens said throttle valve, as the full close reference value; andopening degree calculating means for calculating the opening degree of said throttle valve on the basis of a difference between the signal of said throttle sensor and the full close reference value.