公开(公告)号：USRE30188E

公开(公告)日：1980-01-15

申请号：US889145

申请日：1978-03-22

Applicant: Wilfred F. Predhome, Jr.

Inventor： Wilfred F. Predhome, Jr.

IPC: F01L1/30 ,  F01L13/00

CPC classification number: F01L1/181 ,  F01L1/04 ,  F01L1/047 ,  F01L1/0532 ,  F01L1/14 ,  F01L1/146 ,  F01L1/30 ,  F01L13/0015 ,  F01L1/042 ,  F01L2001/0535 ,  F01L2001/054 ,  Y10T74/18312

Abstract: A system for varying valve timing; i.e. the rotational angle of the crankshaft during which an intake or an exhaust valve of a cylinder of a reciprocating internal combustion engine is open which results in varying valve overlap, and for varying valve lift of such intake and exhaust valves. A desmodromic cam and cam follower convert rotation of a cam shaft to reciprocating rotation, or oscillation, of the cam follower. The reciprocating rotation of the cam follower is converted by the interaction of a secondary cylindrical cam, a cylindrical control ring, and a reciprocating member to linear motion of the reciprocating member which reciprocating member is operatively connected to a poppet valve. Timing and lift of the reciprocating member and valve are variable over predetermined limits as a function of engine rpm and load by rotation of the cylindrical control ring. Each valve train positively closes as well as opens its associated valve.

公开(公告)号：US4061115A

公开(公告)日：1977-12-06

申请号：US691429

申请日：1976-06-01

Applicant: Wilfred F. Predhome, Jr.

Inventor： Wilfred F. Predhome, Jr.

IPC: F01L1/30 ,  F01L13/00 ,  F01L1/34

CPC classification number: F01L1/0532 ,  F01L1/04 ,  F01L1/047 ,  F01L1/14 ,  F01L1/181 ,  F01L1/30 ,  F01L13/0015 ,  F01L2001/0535 ,  F01L2001/054 ,  Y10T74/18312

Abstract: A system for varying valve timing; i.e. the rotational angle of the crankshaft during which an intake or an exhaust valve of a cylinder of a reciprocating internal combustion engine is open which results in varying valve overlap, and for varying valve lift of such intake and exhaust valves. A desmodromic cam and cam follower convert rotation of a cam shaft to reciprocating rotation, or oscillation, of the cam follower. The reciprocating rotation of the cam follower is converted by the interaction of a secondary cylindrical cam, a cylindrical control ring, and a reciprocating member to linear motion of the reciprocating member which reciprocating member is operatively connected to a poppet valve. Timing and lift of the reciprocating member and valve are variable over predetermined limits as a function of engine rpm and load by rotation of the cylindrical control ring. Each valve train positively closes as well as opens its associated valve.

Abstract translation: 用于改变气门正时的系统 即曲轴的旋转角度，在此期间往复式内燃机的气缸的进气门或排气门打开，这导致阀重叠的变化，以及用于改变这种进气门和排气门的气门升程。 解调器凸轮和凸轮随动件将凸轮轴的旋转转换为凸轮从动件的往复旋转或振动。 凸轮从动件的往复旋转通过副圆柱形凸轮，圆柱形控制环和往复运动构件的相互作用转换成往复运动构件与往复运动构件可操作地连接到提升阀的直线运动。 往复式构件和阀门的定时和升程通过圆柱形控制环的旋转作为发动机转速和负载的函数而变化超过预定极限。 每个阀门正确关闭以及打开其相关的阀门。