Effect of Carbon Deposits Operating Conditions Spark Advance Effect on Detonation

Effect of Carbon Deposits Operating Conditions Spark Advance Effect on Detonation Points : effect of carbon deposits operating conditions spark advance effect on detonation, the factors that effect the detonation, problems in internal combustion engines, ic, engine, auto diesel An accumulation of carbon deposits in the combustion chamber and on the top of the pistons can increase compression to the point where detonation becomes a problem. Carbon deposits are a common cause of detonation in high-mileage engines, and can be especially thick if the engine consumes oil because of worn valve guides and seals, worn or broken piston rings and/or cylinder wear. Infrequent driving and not changing the oil often enough can also accelerate the buildup of deposits. In addition to increasing compression, carbon deposits also have an insulating effect that slows the normal transfer of heat away from the combustion chamber into the head. A thick layer of deposits can therefore raise combustion temperatures and contribute to “pre- ignition” as well as detonation. Spark Advance Effect on Detonation Too much spark advance can cause cylinder pressures to rise too rapidly. If resetting the timing to stock specification doesn’t help, retarding the timing a couple of degrees may be necessary to keep detonation under control.