JET AIR FUEL MIXING SYSTEM OPERATION


BHE011300113T10

• The nozzle is installed on the primary port outlet of the intake manifold. BARO is fed to the nozzle from upstream of the throttle valve with the hose.

• Under low load, jet air is injected from the nozzle due to the difference in pressure in the primary port and nozzle.

• This jet air flows along the surface of the intake port, and blows off fuel adhering to the surface of the intake port. In order to change the direction of the air-fuel mixture flow upward, a guide (anti-wet port) with a step is provided on the bottom of the intake port outlet. As a result, atomization is accelerated under low load when air intake velocity is slow, and air current is formed so that the air-fuel mixture flows to the intake port.

1
Primary port
2
Intake manifold vacuum
3
BARO
4
Jet air fuel mixing nozzle
5
Anti-wet port
6
Jet air