公开(公告)号：US06925976B2

公开(公告)日：2005-08-09

申请号：US10793663

申请日：2004-03-05

申请人： Mark A. Israel ,  John P. Harttey

发明人： Mark A. Israel ,  John P. Harttey

IPC分类号： F01L1/08 ,  F01L1/18 ,  F01L1/24 ,  F01L13/06 ,  F02D9/06 ,  F02D13/04 ,  F01L9/02

CPC分类号： F01L1/08 ,  F01L1/181 ,  F01L1/2411 ,  F01L13/06 ,  F01L2001/0537 ,  F01L2105/00 ,  F02D9/06 ,  F02D13/04

摘要： A variable valve actuation system for providing discrete exhaust and intake valve lift profiles for various operating modes of an internal combustion engine. The variable valve actuation system includes exhaust and intake rocker assemblies, exhaust and intake hydraulic extension devices operatively coupling corresponding rocker assemblies with respective engine valves and exhaust and intake control valves for selectively supplying the pressurized hydraulic fluid to the extension devices so as to independently switch them between a pressurized condition and a depressurized condition. The engine further includes an exhaust brake provided to initiate a small lift of the exhaust valve during the engine braking operation while the exhaust extension device maintains the exhaust valve open during a compression stroke for bleeder-compression release braking. The exhaust and intake valves can be adjusted independently to provide combinations of valve lift modes.

摘要翻译： 一种可变气门致动系统，用于为内燃机的各种操作模式提供分立的排气和进气门升程曲线。 可变气门致动系统包括排气和进气摇杆组件，排气和进气液压延伸装置，可操作地将相应的摇臂组件与相应的发动机气门和排气和进气控制阀联接，用于选择性地将加压液压流体供应到延伸装置，以便独立地切换它们 在加压状态和减压条件之间。 发动机还包括排气制动器，用于在发动机制动操作期间启动排气门的小升程，同时排气延伸装置在排气压缩释放制动的压缩冲程期间保持排气门打开。 排气和进气阀可以独立调节，以提供气门升程模式的组合。