METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE

Title:

METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2003/029633

Kind Code:

A1

Abstract:

A method of controlling a supercharged internal combustion engine capable of increasing a thermal efficiency, a filling efficiency, a supercharger efficiency, and a freedom degree of cam design by the adoption of Atkinson cycle, particularly, a method of controlling the opening and closing of the valves of an internal combustion engine with supercharger, comprising the step of temporarily re−opening an exhaust valve in the former phase of a compression stroke to reduce an effective compression ratio so as to increase a thermal efficiency without excessively increasing a cylinder pressure, wherein an exhaust valve re−opening timing should desirably be set so that an effective compression ratio&sol expansion ratio comes within the range of 0.5 to 0.9, and the exhaust valve is not temporarily opened in the former phase of the compression stroke at the time of starting and during low load operation and re−opened during high load operation to form the Atkinson cycle.

Inventors:

ASAI GOU (JP)
IMAMORI TOSHIKAZU (JP)
MASUDA HIROSHI (JP)

Application Number:

PCT/JP2002/008963

Publication Date:

April 10, 2003

Filing Date:

September 04, 2002

Export Citation:

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Assignee:

YANMAR CO LTD (JP)
ASAI GOU (JP)
IMAMORI TOSHIKAZU (JP)
MASUDA HIROSHI (JP)

International Classes:

F01L1/08; F01L13/00; F02D13/02; F02D15/00; (IPC1-7): F02D13/02; F02D15/00; F01L1/08; F01L13/00

Foreign References:

US4424790A	1984-01-10
US4561253A	1985-12-31
US4958606A	1990-09-25
JPH09268930A	1997-10-14
JP2000230438A	2000-08-22
JPS60171911U	1985-11-14

Other References: