公开(公告)号：US3786792A

公开(公告)日：1974-01-22

申请号：US3786792D

申请日：1971-05-28

Applicant: MACK TRUCKS

Inventor： PELIZZONI W ,  GIBSON R ,  GREATHOUSE J ,  PEKAR F

IPC: F01L1/24 ,  F01L1/245 ,  F01L13/00 ,  F01L13/04 ,  F01L13/06 ,  F01L13/08 ,  F02D13/04

CPC classification number: F01L1/2422 ,  F01L1/08 ,  F01L1/245 ,  F01L13/0031 ,  F01L13/04 ,  F01L13/06 ,  F01L13/08

Abstract: A system for varying the valve timing of an internal combustion engine to increase the retarding effect of the engine for braking purposes, to increase the compression ratio of a relatively low compression ratio engine to enhance starting, and to optimize breathing to improve the engine performance over the useful operating speed range. The valve timing is varied by changing the total valve train length so as to shift the points on the cam profile at which the valve opening and closing events are determined.

Abstract translation: 一种用于改变内燃机的气门正时以增加用于制动目的的发动机的减速效果的系统，以增加相对较低的压缩比发动机的压缩比以增强启动，并优化呼吸以改善发动机性能 有用的运行速度范围。 通过改变总气门机构长度来改变气门正时，以便确定确定开阀和关闭事件的凸轮轮廓上的点。