What happens when the crankcase is entered into the engine?
What happens when the crankcase is entered into the engine?
Once entered into the crankcase, the atmospheric pressure begins to build. This superheats the air and oil – far faster than what the engine was designed to withhold, consequently boiling the oil into a miasma of oil mist and fuel vapor.
What do you need to know about crankcases?
Frame and running gear (Crankcase and crosshead). Typical crankcase condition monitoring and safety devices are: Relief device—To prevent crankcase breakage in the event of explosion (caused by entrance of process gas into the crankcase). Breather vent—To allow removal of entrained air from the lube oil.
Do you need a crankcase ventilation system in a two stroke engine?
Two-stroke engines with a crankcase compression design do not need a crankcase ventilation system, because normal operation of the engine involves sending the crankcase gases to the combustion chamber.
What happens when crankcase pressure is too high?
Improperly gapped rings can permit blow-by and oil contamination. Detonation can occur. Compression can be lost. Gaskets can be bubbled, burned or blown out. And of course, water can penetrate into the oil, or worse, the cylinders and hydrolock the engine. Not nearly as catastrophic but equally as terminal is excessive blow-by.
Once entered into the crankcase, the atmospheric pressure begins to build. This superheats the air and oil – far faster than what the engine was designed to withhold, consequently boiling the oil into a miasma of oil mist and fuel vapor.
Improperly gapped rings can permit blow-by and oil contamination. Detonation can occur. Compression can be lost. Gaskets can be bubbled, burned or blown out. And of course, water can penetrate into the oil, or worse, the cylinders and hydrolock the engine. Not nearly as catastrophic but equally as terminal is excessive blow-by.
What causes a crankcase ventilation valve to fail?
The PCV Valve transfers gasses from inside the crankcase to the intake manifold where they are burned as part of the normal combustion process. Excess fumes are burned by the engine, rather than released into the atmosphere. PCV valve failure can be caused by other engine problems.
What causes oil windage in a crankcase?
As blow-by saturates the crankcase atmosphere with super-heated oil, it chokes the air inside the crankcase, coating the crank, rods and pistons with a heavy layer of lubricant – far more than these parts need. Of course, a direct contributor to oil windage is excess/over-filled oil levels.
