Title:
UPPER LINK ON MULTI-LINK TYPE PISTON CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2019094884
Kind Code:
A
Abstract:
To lubricate between a pin boss part 23 for an upper pin and the upper pin 4 by using oil mist scattered in a crank case.SOLUTION: A multi-link type piston crank mechanism of an internal combustion engine is composed of an upper link 3, a lower link 6 and a control link 7. The upper link 3 and the lower link 6 are connected via an upper pin 4. A pin boss part 23 for upper pin to which the upper pin 4 is rotatably fitted is provided with a pair of oil mist collecting concave parts 28 on each end face 24. The oil mist collecting concave part 28 allows a depth in an upper pin 4 shaft direction to be shallow on an upper end part 28a of the piston 1 side and to be gradually deeper as nearer to the lower end part 28b. Oil mist is collected in accordance with vertical movement of the upper link 3 and is guided to the inner circumferential side.SELECTED DRAWING: Figure 6
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Inventors:
FUJITA HIDEHIRO
ICHIHARA HIROKI
TOJO TOMOYA
MIURA TOMOHIRO
ICHIHARA HIROKI
TOJO TOMOYA
MIURA TOMOHIRO
Application Number:
JP2017227357A
Publication Date:
June 20, 2019
Filing Date:
November 28, 2017
Export Citation:
Assignee:
NISSAN MOTOR
RENAULT SAS
RENAULT SAS
International Classes:
F01B31/14; F02B75/32; F01M9/12; F02B75/04; F16C7/02; F16C9/04; F16J1/16
Domestic Patent References:
| JPS46247Y1 | 1971-01-07 | |||
| JPS6373513U | 1988-05-17 | |||
| JPH01113114U | 1989-07-31 | |||
| JP2017198073A | 2017-11-02 |
Foreign References:
| WO2017037935A1 | 2017-03-09 | |||
| WO2016042605A1 | 2016-03-24 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tomioka Kiyoshi