PRINCIPLES GASOLINE/DIESEL FUEL SYSTEMS - OD1620 - LESSON 2/TASK 2
amount of pressure in the precombustion chamber. The pressure and the
initial combustion cause a superheated fuel charge to enter the main
(3) The entering mixture hits the hollowed out piston top, creating
turbulence in the chamber to ensure complete mixing of the fuel charge with
the air. This mixing ensures even and complete combustion. This chamber
design will provide satisfactory performance with low fuel injector
pressures and coarse spray patterns because a large amount of vaporization
takes place in the combustion chamber. This chamber is also not very
susceptible to ignition lag, making it more suitable for high speed
c. Turbulence Chamber (figure 41). The turbulence chamber is similar
in appearance to the precombustion chamber, but its function is different.
There is very little clearance between the top of the piston and the head,
so that a high
FIGURE 41. TURBULENCE CHAMBER.