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Re: How much compression on a diesel engine??
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Posted by Fromjb2 on January 24, 2007 at 18:46:30 from (74.101.67.211):
In Reply to: How much compression on a diesel engine?? posted by dave2 on January 24, 2007 at 15:22:09:
Re Diesel engine compression:
After the gas start Diesel engines IH used two types of Diesel engines:
1)The indirect injection model that had glow plugs and a precombustion chamber. The Diesel fuel was injected into the precombustion chamber and ignition was started before cylinder reached TDC. The glow plugs were required to heat the precombustion chamber for a cold start. The compression ratio was about 22:1 giving a cylinder pressure of around 400 or greater PSI. Example D282, D312 and BD154 engines.
2)The direct injection model that injected the Diesel fuel directly into the top of the piston.
These models did not require glow plugs to start but usually had an ether injection system to start in cold weather. The compression ratio was around 17:1 giving a cylinder pressure of about 315 or more PSI. Example all the German build Neuss engines D179,D239,D310,D358. More info on Diesel engines at: http://en.wikipedia.org/wiki/Diesel_engine Not an expert so open to comments and corrections.
JimB
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