A hot patch causes the fuel mixture to ignite too early, resulting in ‘running on.’ It just pinks and keeps going in the regular direction when running fast enough, but just before stopping, the pre-ignition is so early that the piston direction is reversed, and the engine spins backwards and stops.
Can a 2 stroke diesel engine run backwards?
A two-stroke engine can run backwards because the piston controls all event timing (intake, exhaust, etc.) other than ignition, and the piston only knows that it’s going up and down, not which way the crank is rotating. It’s happened to me before.
How do you reverse a 2 stroke engine?
Rotating the camshaft 300400 degrees, putting the opposite profile of the cam under the fuel valve or pump, is a simple technique of reversing two-cycle engines. 8. The reversing servomotor is used to reverse the crankshaft’s rotation.