Patent ID: 6834627
Filing Date: 2004-12-28
Classification: F02B,F02D,Y02T

Abstract:
An intake air amount control apparatus for an internal combustion engine comprising:an opening control mechanism for controlling an opening of a throttle valve disposed on an intake path of the internal combustion engine; a variable valve mechanism for varying opening/closing characteristics of at least one of an intake valve and an exhaust valve of the internal combustion engine; an intake characteristics change mechanism for changing intake characteristics of the internal combustion engine by controlling a parameter or parameters different from (i) the opening of the throttle valve and (ii) the opening/closing characteristics of said at least one of the intake valve and the exhaust valve; an intake amount control device for controlling an intake air amount supplied into a combustion chamber of the internal combustion engine by performing a cooperative control of said opening control mechanism, said variable valve mechanism and said intake characteristics change mechanism; an abnormality detection device for detecting an abnormal condition in said opening control mechanism and said variable valve mechanism; and a fail-safe device for controlling said opening control mechanism, said variable valve mechanism and said intake characteristics change mechanism, in case that the abnormal condition is detected by said abnormality detection device in one of said opening control mechanism and said variable valve mechanism, so as to control the intake air amount by the other of said opening control mechanism and said variable valve mechanism, in place of the cooperative control by said intake amount control device.