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Title:
INTERNAL COMBUSTION ENGINE WITH COMPRESSION RATIO-CHANGING MECHANISM AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2004/092560
Kind Code:
A1
Abstract:
When a compression ratio of an internal combustion engine is locked at high ratio condition, the engine can be operated while avoiding the occurrence of knocking. The engine has a mechanism capable of changing a compression ratio. The mechanism changes, when a compression ratio is detected that it is locked at a high ratio, the driving timing of suction and exhaust valves is changed to the side where suction air to be compressed in a combustion chamber is lowered. Alternatively, a suction air temperature or coolant temperature can be lowered, or further, a speed reduction ratio of a speed changer can be switched to a larger value so that a rotational speed of the engine is increased. This makes knocking unlikely to occur, enabling the engine to run with knocking being prevented from occurring even if a compression ratio is locked at a high ratio.

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Inventors:
MIYASHITA SHIGEKI (JP)
Application Number:
PCT/JP2004/004131
Publication Date:
October 28, 2004
Filing Date:
March 24, 2004
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
MIYASHITA SHIGEKI (JP)
International Classes:
F01L9/04; F02D13/02; F02D15/00; F02D15/04; F02D29/00; F02D35/02; F02D41/22; F02D43/00; F02D45/00; F02M25/07; F02M63/00; F01P7/16; F02B23/10; F02B75/12; (IPC1-7): F02D13/02; F01P7/16; F02D15/02; F02D21/08; F02D41/22; F02M25/07; F02M31/12
Foreign References:
JPH0195576U1989-06-23
JPH06323146A1994-11-22
JPH11280501A1999-10-12
JPH1136906A1999-02-09
JP2000064863A2000-02-29
JPH1162589A1999-03-05
JP2001020837A2001-01-23
JPH03112515U1991-11-18
JPS63189727U1988-12-06
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (7th floor 18-19, Nishiki 2-chome, Naka-ku, Nagoya-sh, Aichi, JP)
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