robs questions 3

What is the firing order of a four stroke engine?
A:Intake, Compression, Ignition, Exhaust.

What is the difference between a S.I and C.I engine?
A:S.I is spark ignition and C.I is compression ignition.

Is there any difference between a S.I and C.I piston if so what?
A:S.I is used in petrol engines and C.I is used in Diesel engines.

What year was the diesel engine invented and by whom?
A:In 1893 the Diesel engine was invented by Rudolf Diesel.

What is the purpose of the oil jet on the connectng rod, and where does it spray?
A:The purpose of the oil jet is to spray on the walls of the cylinder bore as it travels from TDC to BDC to help lubricate and prevent ceasing Etc.

On the connecting rod where is the big end and little end?
A: Big end connecting to the crankshaft and Little end connecting to the piston.

What is the purpose of the thrust washers on the crankshaft?
A:The thrust washers stop the play of the conrods on the crankshaft, and the crank itself.

On a diesel engine whats the difference between direct injection and a indirect injection type?
A: Direct is injected directly into the combustion chamber while Indirect in injected into a Pre-combustion chamber before being ignited.

Explan the term valve timing?
A:Valve timming is the time a valve opens and closes during the four stroke cycles. Exhaust opening to let out exhaust gases, Inlet opening to let in the Air/fuel mixture and then both of them closing to keep the mixture in for compression.


Why do we have valve clearance?
A:Valve clearance is the gap between the camlobe and the top of the valve. You can damage your engine if you set your clearances too tight causing it to wear and after prolonged wearing it can stop the valves from seating properly.

What is the purpose of a glow plug on a diesel engine?
A:To heat up the combustion chamber to prepare for firing.

Whats the difference between an two stroke and four stroke petrol engine?
A: Two storke engines fire once every 2 cycles. There intake and combustion cycle happen at the same time and there exhaust and compression cycle happen at the same time allowing it to fire every 2 cycles.
The 4 stroke takes 4 cycles to fire once. Intake, compression, combustion and exhaust to fire once. the cycles happen individually.