초록 ▼

A control method of an internal combustion engine with which braking force while reducing the speed of the motor vehicle can be established by generating pumping loss effectively by using a variable valve mechanism enabling to control arbitrarily the open-close timing and the lift amount of air inta

A control method of an internal combustion engine with which braking force while reducing the speed of the motor vehicle can be established by generating pumping loss effectively by using a variable valve mechanism enabling to control arbitrarily the open-close timing and the lift amount of air intake and exhaust valves of the engine. When the break step-on force detection means detects a step-on force on a brake and an operation of the anti-lock brake system is selected, at least one of the intake valve or the exhaust valve is made close, another one not closed of the intake valve or the exhaust valve is made open once in a single revolution of the engine while a piston moves from a top dead center to a bottom dead center, and a lift of the valve is controlled to be a designated value.

대표청구항 ▼

[ What is claimed is:] [1.] A control method of an internal combustion engine in a motor vehicle, comprising:a valve mechanism including an intake valve and an exhaust valve combined with a cylinder of said internal combustion engine;a valve mechanism control means for controlling said valve mechani

[ What is claimed is:] [1.] A control method of an internal combustion engine in a motor vehicle, comprising:a valve mechanism including an intake valve and an exhaust valve combined with a cylinder of said internal combustion engine;a valve mechanism control means for controlling said valve mechanism;an operation status detection means for detecting an operation status of said internal combustion engine;a brake step-on force detection means for detecting step-on force on a brake; andan anti-lock brake system;the method comprising the steps, when said brake step-on force detection means detects said step-on force on said brake and said anti-lock brake system is activated, of closing at least one of said intake valve and said exhaust valve, opening another of said intake valve and said exhaust valve during a suction stroke of the cylinders and controlling a lift of the another of said intake valve and said exhaust valve for restricting a path area of air exiting the cylinder during a compression stroke to control magnitude of compression for engine braking.