Propane injection idea
#1
Propane injection idea
Now admittedly this idea will sound a bit crazy:
We know that propane can act as a refrigerant in automotive AC systems. Safe, maybe not, but it does work.
Now here's my idea:
Direct cylinder injection, of LIQUID propane, in a 4 cycle internal combustion engine, when the piston is at or a little after BDC, starting the compression stroke, right after the intake valve closes. The propane would cool the air in the cylinder as it transformed from a liquid to a gas, lowering the amount of force needed to compress the mixture, thereby increasing engine output and efficiency. Then it would be ignited conventionally by a spark plug slightly before TDC.
Thoughts? Just something that popped into my head this morning.
We know that propane can act as a refrigerant in automotive AC systems. Safe, maybe not, but it does work.
Now here's my idea:
Direct cylinder injection, of LIQUID propane, in a 4 cycle internal combustion engine, when the piston is at or a little after BDC, starting the compression stroke, right after the intake valve closes. The propane would cool the air in the cylinder as it transformed from a liquid to a gas, lowering the amount of force needed to compress the mixture, thereby increasing engine output and efficiency. Then it would be ignited conventionally by a spark plug slightly before TDC.
Thoughts? Just something that popped into my head this morning.
#2
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At least you admit that you made a mistake and won't argue about it!
Intercoolers do make sense with turbo or superchargers where the air heats up somewhat. You can get more power out by using a cooler mixture, but how would that effect efficiency, I do not know. More power doesn't necessarily mean more efficient operation.
Intercoolers do make sense with turbo or superchargers where the air heats up somewhat. You can get more power out by using a cooler mixture, but how would that effect efficiency, I do not know. More power doesn't necessarily mean more efficient operation.
#6
Originally Posted by rusty70f100
Now admittedly this idea will sound a bit crazy:
We know that propane can act as a refrigerant in automotive AC systems. Safe, maybe not, but it does work.
Now here's my idea:
Direct cylinder injection, of LIQUID propane, in a 4 cycle internal combustion engine, when the piston is at or a little after BDC, starting the compression stroke, right after the intake valve closes. The propane would cool the air in the cylinder as it transformed from a liquid to a gas, lowering the amount of force needed to compress the mixture, thereby increasing engine output and efficiency. Then it would be ignited conventionally by a spark plug slightly before TDC.
Thoughts? Just something that popped into my head this morning.
We know that propane can act as a refrigerant in automotive AC systems. Safe, maybe not, but it does work.
Now here's my idea:
Direct cylinder injection, of LIQUID propane, in a 4 cycle internal combustion engine, when the piston is at or a little after BDC, starting the compression stroke, right after the intake valve closes. The propane would cool the air in the cylinder as it transformed from a liquid to a gas, lowering the amount of force needed to compress the mixture, thereby increasing engine output and efficiency. Then it would be ignited conventionally by a spark plug slightly before TDC.
Thoughts? Just something that popped into my head this morning.
Gunner15a
#7
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#9
Liquid propane injection is already commercially available both in the USA and in Europe. The only way for automotive LPG conversions to meet current EPA regulations is with port injection and vapor injection is more commonly used than liquid injection.
Generally, conversions are done for economic reasons rather than for 1/4 mile drag racing performance. Actually, it is not the fuel that governs the performance of an engine but rather the amount of air that it can ingest. Propane's effect on full-throttle performance is that the propane vapor displaces more air in the intake manifold than atomized liquid gasoline. Once in the combustion chamber, all fuels must be vaporized before they can burn.
Generally, conversions are done for economic reasons rather than for 1/4 mile drag racing performance. Actually, it is not the fuel that governs the performance of an engine but rather the amount of air that it can ingest. Propane's effect on full-throttle performance is that the propane vapor displaces more air in the intake manifold than atomized liquid gasoline. Once in the combustion chamber, all fuels must be vaporized before they can burn.
#10