Decompression device in an internal combustion engine

Claim 1

A decompression device for an internal combustion engine having at least one cylinder, at least one valve, and a camshaft including at least one cam having a base circle cam surface, said decompression device comprising: a controllable operating spindle mounted on said engine and extending along the length of and parallel to said camshaft; at least one decompression cam disposed on said operating spindle and provided for each said at least one cylinder; a follower element for transmitting an operative lift of said camshaft cam to said valve; a ratchet wheel connected to said spindle; a trip element coacting with said ratchet wheel for restoring said decompression cam to an original position; a decompression lever having one end for contacting said follower element and being articulately disposed between said decompression cam and said follower element; a vertically adjustable bearing contacting the other end of said decompression lever; and spring means for articulately mounting said decompression lever on said adjustable bearing and for applying said decompression lever to said decompression cam under spring loading, said at least one decompression cam being controllable to cause said decompression lever to selectively maintain said follower element in a decompression position with said follower element being spaced apart from said base circle cam surface.