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sid_galt
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Has an otto cycle engine been developed which gives a non pulsed output?
sid_galt said:Has an otto cycle engine been developed which gives a non pulsed output?
The only way that I can see it happening, if I'm understanding the question correctly, would be to have an essentially infinite number of combustion chambers (cylinders or lobes) firing sequentially so the explosions act like a wave. I don't think that it would fit in a Volkswagon.Andy said:surely even the wankel engine is a pulsed output?
Andy said:surely even the wankel engine is a pulsed output?
sid_galt said:Has an otto cycle engine been developed which gives a non pulsed output?
Having read this post, I think that I might have misunderstood the original question. I thought that it referred to equalizing the combustion so as to eliminate the need for a flywheel, harmonic balancer, etc. in order to obtain a smooth mechanical output.Clausius2 said:It seems any of us know what you mean by "pulsed". The pulsation in an Otto cycle engine- I will assume you are referring to something practical like an spark ignition engine- is produced by a pressure wave as exhaust valve opens.
Danger said:Having read this post, I think that I might have misunderstood the original question. I thought that it referred to equalizing the combustion so as to eliminate the need for a flywheel, harmonic balancer, etc. in order to obtain a smooth mechanical output.
Danger said:Having read this post, I think that I might have misunderstood the original question. I thought that it referred to equalizing the combustion so as to eliminate the need for a flywheel, harmonic balancer, etc. in order to obtain a smooth mechanical output.
sid_galt said:I was referring to an otto cycle engine which had continuous combustion like the jet engine.
sid_galt said:BTW, are the 2 stroke, 4 stroke and Wankel engines the only implementation of the Otto Cycle
sid_galt said:edit: One more question, during the downward stroke of the piston in a piston engine, does the car feel an upward force?
Right... I misunderstood. What you're asking about is impossible within the parameters of an Otto cycle.sid_galt said:continuous combustion like the jet engine.
No. The only other one that comes to mind immediately, because I love the thing, is the 'K-cycle'. It was developed in Saskatchewan or Manitoba by a fellow in his home shop, and I don't know if it ever went into commercial production. It was based upon sets of counter-acting pistons angled something like 160º from each other and pushing on a swash plate between them. What made it especially peculiar was that the pistons remained essentially where they were and the block rotated around them. It was all housed within a case that looked a lot like 2 small garbage cans fastened together at an angle. It would burn just about any fuel, and the one demonstrated was producing approximately 500hp from 350ci. Tonnes of torque too, if memory serves.sid_galt said:BTW, are the 2 stroke, 4 stroke and Wankel engines the only implementation of the Otto Cycle
Shouldn't, I suspect, because the downward force is still contained within the physical limitations of the vehicle. With it being an enclosed system, the forces should balance out.sid_galt said:edit: One more question, during the downward stroke of the piston in a piston engine, does the car feel an upward force?
sid_galt said:BTW, are the 2 stroke, 4 stroke and Wankel engines the only implementation of the Otto Cycle
Danger said:No. The only other one that comes to mind immediately, because I love the thing, is the 'K-cycle'. It was developed in Saskatchewan or Manitoba by a fellow in his home shop, and I don't know if it ever went into commercial production. It was based upon sets of counter-acting pistons angled something like 160º from each other and pushing on a swash plate between them. What made it especially peculiar was that the pistons remained essentially where they were and the block rotated around them.
That is exactly the motor that I was reffering to, which was called the 'K-cycle' when I saw it. Since the report was on CBC or CTV national TV here, and the production facilities were here, I misunderstood and thought that the motor itself was developed here. Thanks for the link!Kenneth Mann said:http://www.saintjohn.nbcc.nb.ca/Heritage/bricklin/Rotary.htm engine.
Kenneth Mann said:There have been several similarly intriguing designs. They have all suffered from the same flaw, the NIH factor! Another particular example is the http://www.saintjohn.nbcc.nb.ca/Heritage/bricklin/Rotary.htm engine.
sid_galt said:What's the NIH factor
A non pulsed otto cycle engine is a type of internal combustion engine that operates on the otto cycle, which is a thermodynamic cycle for spark-ignition engines. Unlike a pulsed otto cycle engine, which has a single power stroke for every two revolutions of the crankshaft, a non pulsed otto cycle engine has a power stroke for every revolution of the crankshaft.
In a non pulsed otto cycle engine, the intake stroke draws in a fuel-air mixture into the cylinder. The compression stroke compresses the mixture, and then the spark plug ignites the mixture, causing a rapid expansion of gases and driving the piston down. The exhaust stroke then expels the burned gases out of the cylinder. This process repeats for every revolution of the crankshaft, generating power.
Compared to a pulsed otto cycle engine, a non pulsed otto cycle engine has a smoother operation due to having a power stroke for every revolution of the crankshaft. This results in less vibration and noise. Additionally, a non pulsed otto cycle engine can produce more power and torque due to the increased number of power strokes.
One limitation of a non pulsed otto cycle engine is that it requires a more complex engine design with additional parts such as an extra set of valves and a camshaft. This can increase the weight and cost of the engine. Additionally, a non pulsed otto cycle engine may have lower fuel efficiency compared to a pulsed otto cycle engine.
Non pulsed otto cycle engines are commonly used in passenger vehicles, motorcycles, and small aircraft. They can also be found in lawn mowers, chainsaws, and other small engine applications. In general, they are used in any vehicle or equipment that requires a lightweight and compact engine with relatively high power output.