Patent ID: 7143744
Filing Date: 2006-12-05
Classification: F02D

Abstract:
1. A detection method for throttle opening degree in an internal combustion engine having a throttle valve installation portion that deposits accumulate thereon, the method comprising the steps of: converting an actual throttle opening degree determined through actual detection to an opening area, based on a relationship between throttle opening degree and the opening area of the throttle valve installation portion when the throttle valve installation portion is in a reference deposit state; determining an actual opening area by subtracting an opening area change amount of the throttle valve installation portion, which corresponds to a change in deposit amount with respect to the reference deposit state, from the opening area; and determining a control throttle opening degree by converting the actual opening area to the control throttle opening degree based on the relationship between the throttle opening degree and the opening area of the throttle valve installation portion in the reference deposit state.