Title:
BALANCER DEVICE AND INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/188977
Kind Code:
A1
Abstract:
According to the present invention, a crank shaft (4) has: first and second crank bending parts (4a, 4b) disposed at the same angle in the rotational direction of the crank shaft (4); a third crank bending part (4c) disposed to be shifted by 120 degrees with respect to the crank bending parts (4a, 4b); and a fourth crank bending part (4d) disposed to be shifted by 120 degrees with respect to the third crank bending part (4c). A balancer shaft (11) has: a first balancer weight (14a) that is provided at the central position between the first and second crank bending parts (4a, 4b) and disposed to be shifted by 30 degrees in the rotational direction of the balancer shaft (11) from an upper intersection point (39) between a lower circle (38) and a vertical axis; and a second balancer weight (14bc) disposed to be shifted by an angle within a range of 150-180 degrees (exclusive of 180 degrees) from the first balancer weight (14a) in the rotational direction of the balancer shaft (11).
Inventors:
HIRANO TAKASHI (JP)
Application Number:
PCT/JP2020/001189
Publication Date:
September 24, 2020
Filing Date:
January 16, 2020
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F16F15/26; F02B77/00
Foreign References:
| JP2018071587A | 2018-05-10 | |||
| JP2018510294A | 2018-04-12 | |||
| JP2010038359A | 2010-02-18 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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