cylinder pressure
cylinder pressure
(OP)
Okay, here's a softball question that I'm sure everyone but me (who knows nothing about combustion engines) can answer.
What is the PSI of a cylinder in a 4,6, & 8 cylinder engine?
The reason for the question stems from my curiousity into building an electric engine that operates like a combustion engine. Instead of igniting gasoline to create pressure, use a strong electro-magnet in the engine block with a fixed magnet in the cylinder - an alternator can be used to change to polarity of the current, either to repulse the cylinder or attract it. And, current between the individual cylinders could rotate (firing order) just as they do in combustion engines.
Anyone want to take a stab at how large an electro-magnet would be needed to create the same amount of PSI?
What is the PSI of a cylinder in a 4,6, & 8 cylinder engine?
The reason for the question stems from my curiousity into building an electric engine that operates like a combustion engine. Instead of igniting gasoline to create pressure, use a strong electro-magnet in the engine block with a fixed magnet in the cylinder - an alternator can be used to change to polarity of the current, either to repulse the cylinder or attract it. And, current between the individual cylinders could rotate (firing order) just as they do in combustion engines.
Anyone want to take a stab at how large an electro-magnet would be needed to create the same amount of PSI?





RE: cylinder pressure
By the way, your proposal will result in an extremely complicated and expensive electric motor which is probably less efficient than a standard electric motor, and I don't see the advantage over a plain ordinary electric motor, but if you know something that I don't, good luck with it.
RE: cylinder pressure
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: cylinder pressure
RE: cylinder pressure
RE: cylinder pressure
Also you do not make it clear if you intend to open and close the valves on the normal engine.
Regards
eng-tips, by professional engineers for professional engineers
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RE: cylinder pressure
RE: cylinder pressure
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: cylinder pressure
RE: cylinder pressure
But they are on the blurry edge of being 3 phase synchronous AC motors.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: cylinder pressure
That said, the idea stems from the concept of being able to create an electro-magnetic engine in the shape of an ordinary combustion engine so that it could be installed into any gasoline driven automobile without modifying the other components of the vehicle AND since the design operates with magnetically driven pistons (and valves!) it would (or could) have a similar sound and appeal of a combustion engine to those who like 'classic' designs.
The vision is that when you step on the gas, the engine revs by increasing the speed of the pistons action by increasing the magnetic force of the electro magnet.
Impractical - yes, no doubt about it when compared to just putting electric motors behind each wheel. However, if the engine can be built from ceramic or some type of light weight/strong polymer, then perhaps by lessening the weight of the vehicle one can compensate for loss of performance from the lack of efficiency.
So, the question remains: How strong a electro magnet would one need to create the type of pistion movement that takes place in a combustion engine?
RE: cylinder pressure
As we have tried to intimate, to do it well is very, very, difficult, perhaps impossible.
So, are you a clown, or are you willing to listen?
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: cylinder pressure
"could be installed into any gasoline driven automobile without modifying the other components of the vehicle" - IMPOSSIBLE!
- engine installations often vary from year to year within a given model, so you would need thousands of different configurations.
- What about heater/defrost?
- If the weight varies by much the handling, antilock braking and stability control will be compromised.
- Where are you going to get all of the power needed to drive the magnets? Are you going to hide a dozen batteries in the truck? I haven't seen any dilithium crystals for sale yet.
- Every automatic transmission will need to be retuned, with most requiring custom tweaked software.
- etc., etc.
I like to think outside the box, but this is a lost cause.
ISZ
RE: cylinder pressure
Pull the plug - this one is DOA.
Thank you.
RE: cylinder pressure
RE: cylinder pressure
RE: cylinder pressure
RE: cylinder pressure