US 8,150,597 B2 · Method and system for controlling an internal combustion engine

Abstract

Methods and systems for controlling an internal combustion engine are provided. One example method may include closing an intake valve later during a cylinder cycle than a timing with which an amount of air inducted into a cylinder from an air intake passage would be maximized, and earlier during the cylinder cycle as a desired amount of air to be inducted into the cylinder increases, while an engine is operating at a given engine speed. The method may further include closing the intake valve earlier during a cylinder cycle as the engine speed increases when the desired amount of air to be inducted into the cylinder is at a maximum.

Claims21

Dependent claims

A method of controlling an internal combustion engine having a cylinder accommodating a piston which reciprocates therein, and defining a combustion chamber, an air intake passage through which air is inducted into said cylinder, and an intake valve capable of shutting off air flowing into said cylinder from said air intake passage, the method comprising:

closing the intake valve in a manner such that a timing of the closing of the air intake valve is retarded beyond a timing at which an amount of air inducted into the cylinder would be maximized, and the timing of the closing of the air intake valve is advanced as a desired amount of air to be inducted into the cylinder increases while the engine speed is at a predetermined engine speed;
and
closing the intake valve in a manner such that a timing of the closing of the air intake valve is advanced as the engine speed increases, when the desired amount of air to be inducted into the cylinder is at a maximum.

Dependencies are inferred from the claim text.

Method and system for controlling an internal combustion engine

Life of this patent

Method and system for controlling an internal combustion engine

Life of this patent

Abstract

Claims21