Science of Cars

Automotive engineering and mechanical science

How Diesel Car Engines Work

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The Diesel engine was created by Rudolf Diesel in response to the fuel inefficiency of gasoline engines. At its core, the way a Diesel engine operates is nearly identical to the machinations of the gasoline engine – the primary purpose is to use internal combustion to convert the chemical energy of fuel into mechanical energy that can drive the movement of the pistons whose up and down movements drive the crankshaft and create the rotating motion required to move the car forward.

Most motor vehicles contain a four stroke diesel engine: first, the intake valves open allowing air into the cylinder and forcing the initial downward motion of the pistons; second, the pistons move back up and compress the air; third, as the piston reaches the top, the fuel is injected and the air, having been heated by the act of compression, ignites the fuel and the combustion forces the piston back down; fourth, the piston moves back to the top, pushing out the exhaust created from the combustion as opposed to a gasoline engine that uses a spark from a sparkplug to ignite the fuel air mixture.

Diesel engines are more fuel efficient than their gasoline counterparts, resulting in lower fuel consumption; a common margin is 40% more miles per gallon for an efficient turbo diesel. Diesel engines also produce very little carbon monoxide as they burn the fuel in excess air even at full load.

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500+hp 383 Stroker Turn key Chevy Crate Engine

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Family owned and operated for over 40 years with over 75000 satisfied customers. Rated #1 Click on blue link Here is a 500hp 383 stroker Turn Key crate engine. Powered by the Home of the most complete Live Run Turn Key Crate Engine. Chevy and Ford Performance Engines. Building Muscle Car Engines Since 1969

MP Jets Diesel Hybrid, hot starts

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This clip illustrates that it’s the HEAT that allows a diesel engine to run on a no ether fuel . With the magic castor and Amsoil mix, sufficient heat is generated on a few prime runs to allow a start. With the motor oil and MEKP though, it’s a no go. I suspect, however, that though both fuels take the engine up to the same temperature, it’s the castor/Amsoil mix that allows a run at a slightly lower temperature. I did need to overcompress, a small amount, even for a hot start. However, note the no prime start just after shutdown and before the engine cools off . This was with the compression at the final run position. Once again, IT’S THE HEAT that lets our diesel engines run on compression ignition alone.

OS Engines FS-48 Surpass Diesel Conversion & Etherless Fuel

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In this video I run the FS-48 diesel conversion I did about three years ago. I rebuilt it last year to replace a damaged liner and ring (unrelated to the diesel conversion). I also added the crankcase recirculation system OS uses in the new Alpha Series. Once the engine is warmed up I can switch to a fuel mix with no ether. 12% oil, 87% kerosene, and 1% DII. I did not measure RPM this time, but it has run at 10800 RPM on the etherless fuel while turning a Graupner 12×6. Fuel consumption is on the order of 12oz (355ml) per hour at wide open throttle in flight. The compression setting is substantially higher without ether, but the engine appears to be doing well. in the past I had run the engine with 20% castor oil in this fuel. The 12% synthetic oil is an experiment at this time.


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