US 2003/0075151 A1 · Apparatus and method for controlling intake air amount of internal combustion engine

Abstract

In an internal combustion engine provided with a variable valve mechanism that varies at least a valve operating characteristic (valve lift amount, valve operating angle and the like) of an intake valve, a target volume flow ratio equivalent to a target torque of the engine is obtained to be converted into a valve opening area, and a target valve operating characteristic of the variable valve mechanism is set based on the converted valve opening area, to control the variable valve mechanism so that an actual valve operating characteristic reaches a target valve operating angle, thereby executing with high accuracy an intake air amount control mainly by the variable valve mechanism.

Claims55

Dependent claims

An apparatus for controlling an intake air amount of an internal combustion engine provided with a variable valve mechanism that varies at least a valve operating characteristic of an intake valve, comprising:

an operating condition detecting sensor detecting operating conditions of said engine;
a valve operating characteristic detecting sensor detecting said valve operating characteristic;
and
a control unit that sets a target intake air amount equivalent to a target torque according to the operating conditions of the engine, sets a target valve operating characteristic based on the set target intake air amount, and controls said variable valve mechanism so that an actual valve operating characteristic reaches said target valve operating characteristic.

1 more element

Dependencies are inferred from the claim text.

Apparatus and method for controlling intake air amount of internal combustion engine

Life of this patent

Apparatus and method for controlling intake air amount of internal combustion engine

Life of this patent

Abstract

Claims55