Title:
VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2016/194511
Kind Code:
A1
Abstract:
Provided is a variable compression ratio mechanism (5) in which a control shaft (10) is rotationally driven by an electric motor (21) via a wave gear speed reducer (22). The wave gear speed reducer (22) comprises a first internal gear member (31), an external gear member (32) that is arranged concentrically on the interior of the first internal gear member (31), a wave generator (33) arranged on the interior of the external gear member (32), and a second internal gear member (34). The ratio of the number of teeth of a fixed gear section (35) of the first internal gear member (31) to the number of teeth of a first gear section (37) of the external gear member (32) is set to be smaller than the ratio of the number of teeth of an output-side gear section (42) of the second internal gear member (34) to the number of teeth of a second gear section (38) of the external gear member (32). The tooth height of the output-side gear section (42) of the second internal gear member (34) is set relatively high in order to increase ratcheting torque and minimize ratcheting.
Inventors:
HIYOSHI RYOSUKE (JP)
TANAKA YOSHIAKI (JP)
KIYOSAWA YOSHIHIDE (JP)
HANDA JUN (JP)
NAGAI KISHIRO (JP)
ONIGATA JUNICHIRO (JP)
YAMADA YOSHIHIKO (JP)
TANAKA YOSHIAKI (JP)
KIYOSAWA YOSHIHIDE (JP)
HANDA JUN (JP)
NAGAI KISHIRO (JP)
ONIGATA JUNICHIRO (JP)
YAMADA YOSHIHIKO (JP)
Application Number:
PCT/JP2016/062730
Publication Date:
December 08, 2016
Filing Date:
April 22, 2016
Export Citation:
Assignee:
NISSAN MOTOR (JP)
HARMONIC DRIVE SYSTEMS (JP)
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
HARMONIC DRIVE SYSTEMS (JP)
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02B75/04; F02B75/32; F02D15/02; F16H1/28; F16H1/32
Domestic Patent References:
| WO2014109179A1 | 2014-07-17 | |||
| WO2014046049A1 | 2014-03-27 |
Foreign References:
| JP2009041519A | 2009-02-26 | |||
| JP2014199119A | 2014-10-23 | |||
| JP2011021729A | 2011-02-03 | |||
| JP2013181636A | 2013-09-12 | |||
| JP2010151088A | 2010-07-08 | |||
| JP2008275039A | 2008-11-13 | |||
| JP2006112476A | 2006-04-27 | |||
| JPS63145842A | 1988-06-17 |
Other References:
See also references of EP 3306054A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
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