Title:
内燃機関の制御装置および制御方法
Document Type and Number:
Japanese Patent JP5765494
Kind Code:
B2
Abstract:
An internal combustion engine (1) that has a variable-compression-ratio mechanism (2) has variable valve mechanisms (7, 8) for an intake valve (4) and an exhaust valve (5), respectively. If a malfunction in the variable-compression-ratio mechanism (2), which controls a mechanical compression ratio via an electric motor (31), is detected from the amplitude of variations in an actual compression ratio, then if the fuel supply to the engine is cut, a throttle valve (14) is opened wider than would be the case if the variable-compression-ratio mechanism (2) were not malfunctioning, thereby reducing in-cylinder negative pressure during the intake stroke. Also, the timing with which the intake valve is closed is advanced and the timing with which the exhaust valve is opened is retarded, increasing the in-cylinder positive pressure during the compression and power strokes. This prevents the variable-compression-ratio mechanism (2) from increasing the compression ratio when control is lost.
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Inventors:
Ryosuke Hiyoshi
Kamata Shinobu
Sho Otsu
Kamata Shinobu
Sho Otsu
Application Number:
JP2014557342A
Publication Date:
August 19, 2015
Filing Date:
November 20, 2013
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02D15/02; F02D13/02; F02D41/12; F02D45/00
Domestic Patent References:
| JP2009293497A | ||||
| JP2005069204A | ||||
| JP8021295A |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tomioka Kiyoshi