DIRECT COMBUSTION
. High efficiency
. Easily start
. Compatible with big engine
. Low exhaust temperature
. Sensitively with quality of fuel
. Need high pressure injection
. Need multi hole injector
. Low turbulence and difficult for high speed
PRE COMBUSTION CHAMBER
. Widely fuel type used
. Good turbulence
. Easily of fuel pump maintenance
. Low injection pressure
. Compromise with changing of injection timing
. Less of detonation
. Complex construction of cylinder head.
. Low capability of starting engine
. Wasteful of fuel usage
PRE COMBUSTION CHAMBER
. Good turbulence when compression stroke
. High speed produce
. Less of nozzle trouble
. Compatible for automobile
. Complex construction of cylinder head
. Low efficiency
. Detonation when in low speed..