公开(公告)号：US20020007809A1

公开(公告)日：2002-01-24

申请号：US09908924

申请日：2001-07-20

Applicant: UNISIA JECS CORPORATION

Inventor： Yoshiaki Miyazato ,  Seinosuke Hara ,  Makoto Nakamura

IPC: F01L001/34

CPC classification number: F01L13/0026 ,  F01L13/0015 ,  F01L2013/0073

Abstract: A VVA apparatus includes a driving shaft, a crank cam arranged at an outer periphery of the driving shaft, a VO cam swingably supported by the driving shaft to actuate an engine valve, and a rocker arm having a first arm swingably mounted to an eccentric control cam at a first pivotal point and a second arm rotatably mounted to the crank cam and the VO cam at a second pivotal point and a third pivotal point, respectively, the rocker arm transmitting a driving force of the crank cam to the VO cam. The valve lift produced by the VO cam is varied by changing a rocking fulcrum of the rocker arm through rotation control of the control cam, and the second pivotal point and the third pivotal point are located on the side of the second arm of the rocker arm.

公开(公告)号：US20020033152A1

公开(公告)日：2002-03-21

申请号：US09927343

申请日：2001-08-13

Applicant: UNISIA JECS CORPORATION

Inventor： Seinosuke Hara ,  Keisuke Takeda ,  Yoshihiko Yamado ,  Yoshiaki Miyazato

IPC: F01L001/32 ,  F01L001/02

CPC classification number: F01L1/10 ,  F01L1/34 ,  F01L13/0026 ,  F01L13/0063 ,  F01L2001/0537

Abstract: A valve operating device for an internal combustion engine enabling both valve timing and valve lift characteristic to be varied depending on engine operating conditions includes intake and exhaust camshafts, an eccentric cam fixed to a first one of the intake and exhaust camshafts so that an axis of the eccentric cam is eccentric to an axis of the first camshaft. A rockable cam is supported on the first camshaft so that the rockable cam rotates or oscillates about the axis of the first camshaft. A rocker arm is oscillatingly supported on an outer periphery of the eccentric cam so that a center of an oscillating motion of the rocker arm revolves around the axis of the first camshaft. Also provided is a control shaft variably controlling the center of the oscillating motion of the rocker arm.

Abstract translation: 一种能够使气门正时和气门升程特性能够根据发动机操作条件而改变的内燃机的气门操作装置包括进气和排气凸轮轴，固定在进气和排气凸轮轴中的第一个凸轮轴上的偏心凸轮， 偏心凸轮偏心于第一凸轮轴的轴线。 在第一凸轮轴上支撑有可摆动的凸轮，使得可摆动的凸轮绕第一凸轮轴的轴线旋转或摆动。 摇臂被摆动地支撑在偏心凸轮的外周上，使得摇臂的摆动运动的中心围绕第一凸轮轴的轴线旋转。 还提供了可变地控制摇臂的摆动运动的中心的控制轴。