VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2020/179820

A1

This variable valve device for an internal combustion engine is provided with a variable mechanism, wherein the variable mechanism is provided with: first and second cams which are fixed to a cam shaft; first and second rocker arms; and a connecting mechanism having a pin and a pin hole and switching the connection states of the rocker arms. In the first state J1, the pin is released from the pin hole, and an engine valve has an operation characteristic following the cam profile of the first cam. In the second state J3, the pin is inserted into the pin hole, and the engine valve has an operation characteristic following the cam profile of the second cam. A second rising interval β3 during the second state is set to closer to an advanced angle side than a first rising interval β1 during the first state. The valve lift change rate γ3A at a predetermined time αA in the rise start portion β3A of the second rise interval is greater than the valve lift change rate γ1A at the same time of the rise start portion β1A in the first rise interval.

JPS6117108	[Title of the device] The valve gear of an internal-combustion engine
JP2006521491	A device for variably operating the gas exchange valve of an internal combustion engine and a method for operating the device.
JPH04127812	[Title of the device] Variable valve timing mechanism

OKAZAKI KAZUYA (JP)
TOKUMARU TAKESHI (JP)
NITTA JUNICHIRO (JP)
HIBI TAIGA (JP)

PCT/JP2020/009150

September 10, 2020

March 04, 2020

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ISUZU MOTORS LTD (JP)

F01L13/00; F01L1/08

JPS6477711A	1989-03-23
JPH01285613A	1989-11-16
JP2017005123A	2017-01-05

HIBIYA Yukihiko et al. (JP)

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