Jet Air Fuel Mixing System Operation - Mazda RX-8 2004 Service Highlights

JET AIR FUEL MIXING SYSTEM OPERATION

• 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.
End Of Sie
01–13–16
INTAKE-AIR SYSTEM
BARO
JET AIR FUEL MIXING NOZZLE
PRIMARY PORT
INTAKE
MANIFOLD
JET AIR
VACUUM
ANTI-WET PORT
CHU011300113S10
CHU0113S025