Abstract: A scavenger valve and method of directing gas in a two stroke engine are provided involving poppet elements in a scavenger valve with specific multiple, different flow paths from individual poppet heads.

Abstract: A poppet valve assembly for a high-speed compressor, the poppet valve assembly including a cage that includes a plurality of counter bores disposed therein. The poppet valve assembly further includes a plurality of poppets, each poppet having a stem and a head. The head of each poppet has a maximum diameter that is less than approximately 0.75 inches. The stem of the poppet is disposed in each of said counter bores. The poppet valve assembly also includes a seat plate overlying said cage, said seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each through bore is sized to have a smaller diameter than the maximum diameter of the head. A lift spacer is disposed in each of the counter bores.

Abstract: A scavenger valve and method of directing gas in a two stroke engine are provided involving poppet elements in a scavenger valve with specific multiple, different flow paths from individual poppet heads.

Abstract: A poppet valve assembly for a high-speed compressor, the poppet valve assembly including a cage that includes a plurality of counter bores disposed therein. The poppet valve assembly further includes a plurality of poppets, each poppet having a stem and a head. The head of each poppet has a maximum diameter that is less than approximately 0.75 inches. The stem of the poppet is disposed in each of said counter bores. The poppet valve assembly also includes a seat plate overlying said cage, said seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each through bore is sized to have a smaller diameter than the maximum diameter of the head. A lift spacer is disposed in each of the counter bores.

Abstract: A miniature poppet valve assembly for a high-speed compressor, the miniature poppet valve assembly includes a plurality of miniature poppets, each characterized by a stem and a head with a maximum head diameter of no more than 0.9 inches; a cage having a plurality of counter bores disposed therein, each counter bore disposed for receipt of a poppet; and a seat plate overlying the cage, the seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each counter bore includes a chamfered edge against which the head of the poppet seats, thereby forming a seal. The chamfered edged is provided with a chamfer angle of approximately 30 degrees. In one embodiment, poppet heads have a convex head surface and are shaped so that the tangent angle at the point of contact between the edge and the head is approximately 30 degrees.

Abstract: A miniature poppet valve assembly for a high-speed compressor, the miniature poppet valve assembly includes a plurality of miniature poppets, each characterized by a stem and a head with a maximum head diameter of no more than 0.9 inches; a cage having a plurality of counter bores disposed therein, each counter bore disposed for receipt of a poppet; and a seat plate overlying the cage, the seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each counter bore includes a chamfered edge against which the head of the poppet seats, thereby forming a seal. The chamfered edged is provided with a chamfer angle of approximately 30 degrees. In one embodiment, poppet heads have a convex head surface and are shaped so that the tangent angle at the point of contact between the edge and the head is approximately 30 degrees.

Abstract: A pre-combustion chamber is adapted to be installed in the spark plug well of an existing engine. The pre-combustion chamber includes an inner combustion chamber housing and an outer cooling jacket housing. The two housing are assembled in such a manner to permit movement therebetween during thermal cycling to minimize stress and fatigue fracture. A resilient seal is installed between the housings.