Two cycle engine
OwnerDavid S. W. Yanginventor
Life of this patent
Estimating the term…
Abstract
A two stroke cycle internal combustion engine (10) is provided which has a one-piece cylinder housing (14) removably secured to a valve drive housing (12) at a top section thereof and a crank housing (16) at a bottom section. The overall combination of the valve drive housing (12), the cylinder housing (14) and the crank housing (16) are formed in a substantially symmetrical manner about a vertical axis line (18). An intake valve member (30) is positioned in a top section of cylinder housing (14) with an exhaust port (62) located at the bottom of a piston (44) travel within a combustion chamber (54). The valve member (30) opens on a downward stroke of the piston (44) which feeds compressed air into chamber (54) and forces spent gases through the exhaust port (62).
Claims17
A two cycle engine comprising:
- (a) valve drive means mounted within a valve drive housing for reversibly displacing a valve member having a head and a stem;
- (b) a cylinder housing housing an upper section and a lower section forming a combustion chamber containing a reversibly displaceable piston member, said cylinder housing upper section having (1) at least two air intake ports, (2) a fuel injection port, and (3) ignition means for igniting a fuel and air mixture, said cylinder housing lower section having an exhaust port for egress of exhaust gases, said valve drive housing and said cylinder housing being vertically aligned and secured each to the other,
- (c) a crank housing coupled to said cylinder housing lower section for containing a crank coupled to said piston, and an oil pan;
- and,
- (d) an air intake plenum surrounding said valve stem and in fluid communication with said air inlet ports for passage of air therebetween, said valve drive housing having an air inlet conduit passing through a wall thereof for fluid communication with said air intake plenum.
Dependencies are inferred from the claim text.