Title:
可変圧縮比エンジン
Document Type and Number:
Japanese Patent JP5029290
Kind Code:
B2
Abstract:
A multi-link variable compression ratio engine is provided with a crankshaft (12), a piston (11), a control shaft (20), a linkage, a motor (35) and a reduction mechanism. The crankshaft (12) moves the piston (11) within an engine cylinder. The control shaft (20) has an eccentric axle eccentric relative to its center-axis. The linkage operatively connects the piston to the crankshaft and the crankshaft (12) to the eccentric axle of the control shaft (20). The motor (35) rotates the control shaft (20) so a top-dead-center position of the piston (11) changes to vary compression ratios by changing the positions of the eccentric axle and the linkage. The reduction mechanism (30) couples the motor (35) to the control shaft (20) to transmit a reduced rotation of the motor to the control shaft so a reduction ratio of a rotation angle of the motor to a rotation angle of the control shaft is less at high-compression ratios than at intermediate compression ratios.
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Inventors:
Ryosuke Hiyoshi
Noriaki Tanaka
Shinichi Takemura
Noriaki Tanaka
Shinichi Takemura
Application Number:
JP2007280370A
Publication Date:
September 19, 2012
Filing Date:
October 29, 2007
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02D15/02; F01B9/04; F01B31/14; F02B75/04
Domestic Patent References:
| JP2002115571A | ||||
| JP2003287100A | ||||
| JP2004183594A | ||||
| JP2004150353A | ||||
| JP2002227674A |
Attorney, Agent or Firm:
Masaki Goto
Masahiro Fujii
Yasunari Mita
Masaaki Iida
Masahiro Fujii
Yasunari Mita
Masaaki Iida