Patent ID: 6986337
Filing Date: 2006-01-17
Classification: F02D,Y02T

Abstract:
1. A control device of an internal combustion engine calculating a response time constant of a cylinder air filling amount or its equivalent value when an opening degree of a throttle valve is changed to a target opening degree, provided with: means for setting said target opening degree, means for finding a target intake pipe pressure as a value of convergence of an intake pipe pressure at a downstream side of the throttle valve when maintaining the opening degree of the throttle valve at said target opening degree, means for finding a current intake pipe pressure as an intake pipe pressure at a downstream side of the throttle valve when changing the opening degree of the throttle valve to said target opening degree, means for finding a throttle valve air passage flow rate, and means for finding a cylinder intake air flow rate and calculating said response time constant based on said target intake pipe pressure, said current intake pipe pressure, said throttle valve air passage flow rate, and said cylinder intake air flow rate.