How does a 2 stroke diesel engine work?
Answers:
There isn't such a thing as a 2 stroke diesel engine. It doesn't exist.
it doesn't
where have seen one of those.
Try :
www.howstuffworks.com
- auto stuff
I hope this helps.
dies el good
There is indeed such a thing as a two stroke diesel engine and it is more common than you would think.
It works in much the same way as a two stroke petrol engine with an exhaust valve at the top of the cylinder and intake ports on the sides of the barrel that are uncovered as the piston moves down the stroke.
see this link for a full explaination including piccies
www.marinediesels.info/Basics/.
Detroit diesel make a very good 2 stroke diesel. greyhound buses in the USA use them. they are also used in u.s. army M113 armoured personnel carries and H.M.M.T. trucks which i work with.
kingy is right in that it has an exhaust valve and inlet port. because of the high compression required for a diesel engine, the 2 stroke diesel must be supercharged (this "cleans" the gasses out also) and is often also turbo'd as well. everything happens above the piston face as oppose to 2 stroke petrols were the fuel air mix comes in from under the piston and then up the little chamber bit (i forget what thats called)
on the down ward stroke induction and exhaust happen at the same time (the supercharger blows the exhaust gasses out). on the upward stroke compression and ignition occur.
as soon as ignition happens the exhaust valve opens and so the cycle continues.
2 stroke diesels are not very fuel efficient but they last forever.
hope this helps mate.
Examples of 2 stroke Diesel engines would be the heavy duty General Motors (Detroit Diesel) 6-71 and 8-71 Series engines. American truck drivers referred to the 6-71 as "the buzz in' half dozen", and to the 8-71 simply as a "318" (its U.S horsepower rating.) They can be identified by their high pitched exhaust sound and their propensity to leak oil.
Just like its gasoline/petrol counterpart the 2 stroke Diesel performs one power and exhaust function with each revolution of the crankshaft, As the piston moves down the cylinder it is both producing power and drawing in fuel for the next cycle and then as it moves up the cylinder it produces both compression and removes exhaust, where as the 4 stroke takes two revolutions of the crankshaft , divided into 1/2 revolution segments, for the same result. ( IE: down/intake, up/compression,down/power, up/ exhaust.)
Clear as mud , right?
GM is the most known but nissan also make a 2 stroke called the UD.
Kingy, two strokes have no valves at all. The piston acts as the valves by sliding past ports built into the cylinder wall. Model aircraft fans will know the two stroke diesel only to well. Commer used to make a double acting, (two opposing pistons in one cylinder), two stroke diesel powered lorry. They used to go like stink as I found out when travelling to Oxford from Chipping Norton one day on a motorbike, and being overtaken by one, towing a trailer, full of car bodies. Fair put the s**t up me.
2 stroke diesels work using a super charger to blow air in through the inlet to blow burnt gasese out of the exhaust and chrage the cylinder with air at the same time. it is rather complecated to explain I sugest you get a copy of the fundamentals of motorvehicle technology by Hillier
Vampire
There are two main layouts, one using inlet ports and an exhaust valve, as per GM Detroit Deisel, Foden and others, then there is a valveless system with two pistons per cylinder bore: as well the Rootes TS3, the famous Napier Deltic used this principle, all two stroke deisels require forced induction of some type.
There are several formations for the 2 stroke diesel. Some are similar to that of a 4 stroke petrol engine, some are similar to that of a 2 stroke petrol engine. Operation are similar to a 2 stroke using a "petroil" mixture, but governed by the principles of compression ignition.
The answers post by the user, for information only, UKQnA.com does not guarantee the right.