The engine is designed to be pressurized, for more power (though in this video it is running at atmospheric pressure), and, as it was to put out mechanical power, it needed a shaft to penetrate the crankcase. Shaft seals create friction and pressure leakage losses, so I
made a magnetic drive, where magnets on an inner drum on the crankshaft drive magnets on an outer drum, through a non-magnetic pressure barrier. The power gets out, but the working gas does not. AR
Very nice! Congratulations again. You're engine are really impressive, and show the truth about the false idea that this engines have very low power/torque and potencial to be used in the present. Even that speed valve seems very interesting... could you explain how it works? Tanks and many many congratulations.
The speed controller is a poppet valve that connects the working gas to a larger "volume", thereby lowering the effective compression ratio, and thereby reducing power output.
@MrNik1001 Actually, the dead volume speed controller is more efficient than a throttle, as it does not involve "pumping losses", which a throttle unfortunately does (like breathing through a straw, for example). These losses are one of the several reasons why diesels (which need no throttles) are more efficient than gasoline engines.
The engine is designed to be pressurized, for more power (though in this video it is running at atmospheric pressure), and, as it was to put out mechanical power, it needed a shaft to penetrate the crankcase. Shaft seals create friction and pressure leakage losses, so I
made a magnetic drive, where magnets on an inner drum on the crankshaft drive magnets on an outer drum, through a non-magnetic pressure barrier. The power gets out, but the working gas does not. AR
aross345 1 week ago
Very nice! Congratulations again. You're engine are really impressive, and show the truth about the false idea that this engines have very low power/torque and potencial to be used in the present. Even that speed valve seems very interesting... could you explain how it works? Tanks and many many congratulations.
StirlingEngine123 3 weeks ago
@StirlingEngine123
The speed controller is a poppet valve that connects the working gas to a larger "volume", thereby lowering the effective compression ratio, and thereby reducing power output.
AR
aross345 3 weeks ago
@aross345 would that mean it's more of a brake than a throttle?
MrNik1001 3 weeks ago
@MrNik1001 Actually, the dead volume speed controller is more efficient than a throttle, as it does not involve "pumping losses", which a throttle unfortunately does (like breathing through a straw, for example). These losses are one of the several reasons why diesels (which need no throttles) are more efficient than gasoline engines.
AR
aross345 3 weeks ago