Patent ID: 6390048
Filing Date: 2002-05-21
Classification: F01L,F02B

Abstract:
A gas valve apparatus for an internal combustion engine, said gas valve apparatus comprising:(a) a housing containing a combustion chamber, a first cavity having a first axis, a second cavity having a second axis parallel to said first axis a first inner port connecting said first cavity to said combustion chamber, a first outer port connecting said first cavity to the ambient air, a second inner port connecting said combustion chamber to said second cavity, and a second outer port connecting said second cavity to the ambient air; (b) a first valve body mounted in said first cavity for rotation about said first axis and containing first a bore which extends transversely of said axis entirely through said first valve body so that said first bore has two openings into said first cavity for connecting said first inner port to said first outer port at two rotational positions of said first valve body: (c) a second valve body mounted in said second cavity for rotation about said second axis and containing a second bore which extends entirely through said second valve body so that said second bore has two openings into said second cavity for connecting said second inner port to said second outer port at two diametrically opposite rotational positions of said second valve body; (d) a first gating structure mounted in said housing for movement transversely of said first axis between an inactive position in which said first gate is clear of said first outer port and an active position in which said first gate extends partially into said first outer port, said first gating structure being spaced from said first cavity; (e) a second gating structure mounted in said housing for movement transversely of said second axis between an inactive position in which said second gate is clear of said second outer port and an active position in which said second gate extends partially into said second outer port, said second gating structure being spaced from said second cavity; and (f) an actuator for selectively moving each of said first and second gates to said inactive positions.