The composite combustion chamber was invented by Shi Shaoxi and others in China in 1964. The combustion chamber is in the shape of a deep basin in the piston crown, with a slight contraction of the mouth. A special-shaped intake duct is used to form an intake vortex, and a single-hole shaft needle injection is adopted. Oiler.
The axis of the injector is basically parallel to the wall of the combustion chamber, and the fuel is injected into the peripheral space of the combustion chamber. Under the action of the vortex, the coarse oil particles are scattered on the wall of the combustion chamber to form an oil film, and the fine oil particles are mixed with the air in the space.
When the rotation speed is high, the swirl velocity of the combustion chamber is high, and the oil film fuel on the wall surface increases, which has the characteristics of oil film combustion; while at low rotation speed and starting, the swirl velocity is low, and the amount of fuel mixed in the space increases, which has the characteristics of spatial combustion. , Can improve the cold start performance.