Title:
VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/179762
Kind Code:
A1
Abstract:
This variable valve device for an internal combustion engine is provided with a variable mechanism that can be switched to a first state J1 and a second state, and an oil pressure control device for controlling an oil pressure supplied to the variable mechanism. The oil pressure control device is provided with an oil pressure pump 11, an oil gallery 30, a valve unit 31, a pressure accumulation device 32, and a control unit 100. When the variable mechanism is placed in the first state, the valve unit is placed in the first state to supply a hydraulic fluid in the oil gallery to the variable mechanism. When the variable mechanism is placed in the second state, the valve unit is placed in the second state to discharge a hydraulic fluid from the variable mechanism. During operation of the internal combustion engine, the hydraulic fluid is accumulated in the pressure accumulation device. When the internal combustion engine is started, the valve unit is placed in the first state and the hydraulic fluid accumulated in the pressure accumulation device is released.
Inventors:
TOKUMARU TAKESHI (JP)
OKAZAKI KAZUYA (JP)
NITTA JUNICHIRO (JP)
HIBI TAIGA (JP)
OKAZAKI KAZUYA (JP)
NITTA JUNICHIRO (JP)
HIBI TAIGA (JP)
Application Number:
PCT/JP2020/008816
Publication Date:
September 10, 2020
Filing Date:
March 03, 2020
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
F01L13/00; F02D13/02; F02D13/04; F15B1/033
Foreign References:
| JPH1113429A | 1999-01-19 | |||
| JP2004340074A | 2004-12-02 | |||
| JP2015143484A | 2015-08-06 |
Attorney, Agent or Firm:
HIBIYA Yukihiko et al. (JP)
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