Title:
A good change valve gear of an internal-combustion engine
Document Type and Number:
Japanese Patent JP6187642
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a variable valve gear for an internal combustion engine that enables reduction in pump loss of the internal combustion engine and friction loss when a valve is operated.SOLUTION: A variable valve gear for an internal combustion engine includes: a rocker arm 5 pivotally supported by a support shaft 3 swingably and opening/closing an intake valve 4 along with the swinging operation; a swing arm 6 that has an intermediate portion pivotally supported by the rocker arm 5 swingably by using a fulcrum arm pin 8 and includes a first input roller 15 and a second input roller 13 at positions sandwiching the fulcrum arm pin 8; a cam 2 fixed to a cam shaft 1 and coming into contact with the first input roller 15 to lift the intake valve 4; and a hydraulic actuator 20 that has a tappet 23 coming into contact with the second input roller 13 and a hydraulic chamber 29 having a volume changed by working fluid and causing the tappet 23 to operate to appear/disappear in accordance with the change and that retracts the tappet 23 by contracting the volume of the hydraulic chamber 29 to close the intake valve 4 at any timing while the intake valve 4 is lifted by a cam crest of the cam 2.SELECTED DRAWING: Figure 7
Inventors:
Hiroki Inada
Application Number:
JP2016137767A
Publication Date:
August 30, 2017
Filing Date:
July 12, 2016
Export Citation:
Assignee:
SUZUKI KABUSHIKI KAISHA
International Classes:
F01L13/00; F01L1/18
Domestic Patent References:
| JP2004108302A | ||||
| JP5934004U | ||||
| JP2006118404A | ||||
| JP4219409A | ||||
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Foreign References:
| WO2004085858A1 |
Attorney, Agent or Firm:
Nissei International Patent Office