Title:
火花点火式内燃機関
Document Type and Number:
Japanese Patent JP4930337
Kind Code:
B2
Abstract:
To provide a spark ignition type internal combustion engine materializing an actual compression ratio according to octane number.
This engine is provided with a variable compression ratio mechanism A capable of changing a mechanical compression ratio, and a variable valve timing mechanism B capable of controlling valve close timing of an intake valve 7. The mechanical compression ratio is maintained at the maximum mechanical compression ratio at an engine light load operation side, and is gradually decreased as the engine load gets higher at an engine heavy load operation side. An actual compression-ratio is increased as the octane number of fuel supplied into a combustion chamber 5 gets higher.
COPYRIGHT: (C)2009,JPO&INPIT
Inventors:
Daisuke Akiku
Eiichi Kamiyama
Eiichi Kamiyama
Application Number:
JP2007292325A
Publication Date:
May 16, 2012
Filing Date:
November 09, 2007
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D15/04; F02D13/02; F02D15/00; F02D41/04; F02D45/00
Domestic Patent References:
| JP2005127212A | ||||
| JP2001271682A | ||||
| JP2007247447A | ||||
| JP8177569A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Yoryo Mihashi
Koichi Ito
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Yoryo Mihashi
Koichi Ito