Title:
INTERNAL COMBUSTION ENGINE VARIABLE OPERATION SYSTEM AND CONTROL DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/211853
Kind Code:
A1
Abstract:
The present invention comprises: a variable compression ratio mechanism 3 that controls a mechanical compression ratio; and an intake variable valve mechanism 1A that controls the phase during opening/closing of an intake valve. During a cold start, the variable compression ratio mechanism 3 sets a piston position to a position at which a mechanical expansion ratio reaches substantially a minimum, and the intake variable valve mechanism 1A sets the closing timing of the intake valve 4 to near bottom dead center (BDC) and sets the opening timing (IVO) of the intake valve 4 to a position on an advance angle side beyond top dead center (TDC). Due to these configurations, the temperature of exhaust gas during a cold start of the internal combustion engine can be increased so as to promote the progress of warming-up of an exhaust gas purification catalyst.
Inventors:
NAKAMURA MAKOTO (JP)
Application Number:
PCT/JP2018/014656
Publication Date:
November 22, 2018
Filing Date:
April 06, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D13/02; F02D15/02; F02D43/00
Foreign References:
| JP2011220349A | 2011-11-04 | |||
| JP2008106609A | 2008-05-08 | |||
| JP2010168939A | 2010-08-05 | |||
| JP2016017489A | 2016-02-01 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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