A top priority for maximizing the potential of the Wankel engine requires the utilization of the complete power stroke. The power stroke in a four cycle internal combustion engine consists of the utilization of the combustion pressures that push the piston or rotor from minimum displacement to the maximum displacement.
In the reciprocating piston engine poor energy is created in the 12 o'clock to 1 o'clock and the 5 o'clock to 6 o'clock crankshaft position.
In the Wankel engine poor energy is created at the 12 o'clock to 2 o'clock e-shaft position and maximum energy is produced at the 6 o'clock e-shaft position when the largest third of displacement is about to take place. But unfortunately the exhaust port is opened at this time causing the pressure to go out the exhaust and around the apex seal and into the intake portion of the engine.
This creates serious problems when there are periphery intake ports.
Side ports cause superior separation as the ports are not open until after the exhaust stroke is complete.
Mazda in its new Renesis engine with side intake and side exhaust ports does use a greater portion of the power stroke after the 6 o'clock e-shaft position.
To get maximum torque from a Wankel engine we need periphery intake and exhaust ports as close as possible to the minor axis of the housing and a system that creates perfect separation between the exhaust and intake.
There is a solution, any thoughts?
Ken |