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A four stroke engine has four basic operations within the engine. It has Intake, compression, power and exhaust strokes. During the intake, or suction stroke, a mixture of fuel air is injected into the cylinder.
because diesel ignites with heat. during the intake stroke air is brought into the cylinder. during the compression stroke the air is compressed greatly which builds heat. at the top of the compression stroke a fine mist of diesel is injected into the cylinder which ignites from the heat of the compressed air.most gasoline engines have a compression ratio of 8:1 where as most diesels are 24:1. in an example that is like taking a milk jug and trying to put in 24 more.
In an internal combustion engine with a carburettor a mixture of air and atomised fuel is drawn into the cylinder. If the engine is fuel injected compression ignition engine then air is drawn in, the fuel is introduced just before top dead centre of the compression stoke. If you mean intake stroke, then the answer is air.
3 - 4 per cylinder.
Backfiring is usually an indication of a lean condition. When it does it during cranking, it's probably timing related.
When cranking, the ballast resistor is bypassed to give a hotter spark. If during cranking you do not have power at the coil, but when the key is turned to run you do; there is a problem with the bypass circuit (sometimes it comes from the starter motor solenoid wire)
engine backfire during cranking.
compression is the force pushed on and object. The formula for how much pressure during compression is: force/area.
the contrast medium is either injected by hand with a syringe or is mechanically injected with an automatic injector, sometimes called a power injector, connected to the catheter
it happens during the trough
The volume of a liquid responds poorly to compression, but might decrease slightly.
Compression shirts are used to keep you warm during the cold and cool in the heat.