F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
171/72, 171/73
F01L 7/02 (2006.01)
Patent
CA 2019784
ABSTRACT An improved rotary valve construction is provided for use in conjunction with an internal combustion engine of the type having a housing and at least one piston member reciprocally received within a cylinder formed in the housing. In the conventional fashion, fuel intake passage means formed within the housing communicate a combustible fuel mixture to the cylinder while, likewise, exhaust passage means formed in the engine housing expel exhaust gases from the cylinder. A first and second cylindrical valve member, each having a diametric throughbore, are rotatably mounted in the intake passage means and exhaust passage means, respectively. The valve members are rotatably driven in synchronism with the reciprocation of the piston in the cylinder to thereby open the intake and exhaust passage means via the valve member diametric bore at predetermined rotational positions of the valve members. Each valve member is rotatably provided in a valve member bore so that the rotary valve member and the bore have a space therebetween which allows a compressed fuel/air mixture to circulate therebetween, therby providing cooling and lubrication for the valve by creating a gas bearing. Additionally, each valve member is selectively provided with narrow channels, either knurled or grooved, to thereby provide a labyrinth gland or seal. Ceramic bushings are provided in the bore opposite the channels. Optionally, carbon and rubber or plastic ring seals may be included on either side of each ceramic bushing.
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