VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/063537

Kind Code:

A1

Abstract:

Provided is a variable valve device for an internal combustion engine, the variable valve device making it possible to change the rotation speed of an inverted cam lobe during a single rotation of a driving camshaft when a structure is employed in which the driving camshaft is driven by the rotational force of a crankshaft, and also making it possible to satisfactorily improve the performance of the internal combustion engine. The variable valve device comprises: the driving camshaft (44); and the inverted cam lobe (50a) which is rotatably supported by the driving camshaft (44). The variable valve device comprises a control sleeve (70) which includes a track surface (70a) that is eccentric to the rotation center of the control sleeve (70). The variable valve device comprises a link mechanism (68) which is linked to the driving camshaft (44) and the inverted cam lobe (50a) and includes a control roller (64) that makes contact with the track surface (70a). The variable valve device comprises an actuator (76) for driving the control sleeve (70). The amount of control of the actuator (76) is controlled so that the amount of movement of the track surface (70a) in the planar direction is altered according to the operation conditions of the internal combustion engine (10).

Inventors:

YANO TOSHIYUKI (JP)
EZAKI SHUICHI (JP)

Application Number:

PCT/JP2011/069470

Publication Date:

May 18, 2012

Filing Date:

August 29, 2011

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
YANO TOSHIYUKI (JP)
EZAKI SHUICHI (JP)

International Classes:

F01L1/34

Foreign References:

JP2009092078A	2009-04-30
JP2010196515A	2010-09-09
JP2005291014A	2005-10-20
JP2007198252A	2007-08-09
JP2005180238A	2005-07-07
JP2009057868A	2009-03-19

Other References: