I have some questions -Let’s say your diesel is an indirect mechanical fuel pump, does it work exactly the same as a common rail direct injection? -What’s the difference between a mechanical diesel pump and a mechanical electric diesel pump? -How does an opposing piston 2 stroke Diesel engine work? -What happens exactly in the combustion chamber when a Diesel engine runs away? -Why do diesel big rig engines only go up to 3000 rpm? -What does diesel fuel cetane rating mean?
U said a diesle can perfect run in lambda 1 = 14.5 lambda 3 = 36.4 Lambda 5 = 58.somthing .... Lambda 10 I cant even do the calculations..... But can u please explain how a disle can run AFR'S past 19.1 ? Power for a disle starts to die off at 16.8 also egt's start fall after 14.2 AFR'S due to the flame/ combustion pressure starting to die due to not enough fuel to keep the flame big and strong.... in other words anything past 19.1 your killing the cars combustion cycle and engine will die....how can an engine run in lambda 5 ? Or 3 even ? Please explain....and no I'm not here to argue with u i just would like to see somthing i cant get my head around maybe because i got my disle afrs incorrect
@@msengineeringdavid3148 i guess I'll just have to try it for my self and see....its one of those things u need to see to belive....worst case the disle will just stall with less fuel...thanks for shearing david much appreciated
A diesel is nearly always running lean. That’s due to the fact that it’s a self igniting engine, which relies on air compression to generate the combustion triggering heat. So you need a lot of air. Now the stoichiometric ratio on a diesel is different to a gasoline because of the difference in energy content. Diesel is a more energetic fuel. And last thing, diesel when burned rich or close to the equilibrium air/fuel ratio starts to generate soot, which ruines your exhaust after treatment if you have one. That’s another reason why diesels run in great excess of air.
Usually engine brakes you would find on freight trucks and work with the exhaust. It would be a valve partially blocking the exhaust flow when you have asked for it and have 0 injection. But you wouldn’t I don’t think have intake brakes since it is easier to decompress air than to compress it, thus such a system wouldn’t have much effect.
