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。

公开(公告)号：US20010003973A1

公开(公告)日：2001-06-21

申请号：US09741068

申请日：2000-12-21

Applicant: UNISIA JECS CORPORATION

Inventor： Makoto Nakamura ,  Seinosuke Hara ,  Keisuke Takeda

IPC: F01L001/34

CPC classification number: F01L13/0021 ,  F01L13/0026 ,  F01L2105/00

Abstract: A VVA apparatus includes an operating mechanism that changes a valve-lift amount, and a microcomputer-based controller that controls the operating mechanism to change the valve-lift amount in accordance with engine operating conditions. A first portion of the valve-lift amount between a high lift and a low lift is changed continuously, and a second portion of the valve-lift amount between the low lift and zero lift is changed with one of the low lift and zero lift selected.

Abstract translation: VVA装置包括改变气门升程量的操作机构，以及基于微机的控制器，其控制操作机构以根据发动机工作条件改变气门升程量。 高升程和低升程之间的气门升程量的第一部分被连续地改变，并且低升程和零升程之间的气门升程量的第二部分被选择为低升程和零升程之一 。