FUEL SYSTEM
01–14–8
FUEL INJECTOR FUNCTION
CHU011413250S01
• Injects fuel according to fuel injector control signals from the PCM.
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FUEL INJECTOR CONSTRUCTION/OPERATION
CHU011413250S02
Fuel Injector (FP1, RP1)
• Installed on the intermediate housing at an angle of approx. 45°
°°
°, and injects fuel near the intake port opening.
• Mainly consists of a coil, spring and needle valve.
• Fuel injector with 12 injection holes and injection angle of approx. 30°
°°
° adopted to enhance fuel injection
vaporization.
• When a PCM signal is sent, exciting current passes through the coil, pulling in the needle valve and injecting
fuel.
• The amount of injection is determined by the open time of the needle valve, i.e. the energization time of the coil.
Fuel Injector (FP2, RP2, FS, RS)
• Installed on the intake manifold.
• Mainly consists of a coil, spring, and needle valve.
• Injects fuel into the intake manifold at an angle of approx. 19°
°°
°, so that the fuel is drawn into the housing
together with intake air.
• When a PCM signal is sent, exciting current passes through the coil, pulling in the needle valve and injecting
fuel.
• The amount of injection is determined by the open time of the needle valve, i.e. the energization time of the coil.
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FUEL PUMP RELAY FUNCTION
CHU011413350S05
• Controls the fuel pump on/off according to control signals from the PCM.
• For fuel pump relay control, refer to CONTROL SYSTEM, FUEL PUMP CONTROL. (See 01–40–23 FUEL
PUMP CONTROL OUTLINE, 01–40–24 FUEL PUMP CONTROL BLOCK DIAGRAM, 01–40–24 FUEL PUMP
CONTROL OPERATION.)
• Supplies voltage to the fuel pump via the fuel pump resistor when the fuel pump speed control relay is off.
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COIL
NEEDLE VALVE
SPRING
CHU0114S004
MAIN FUSE BLOCK
FUEL PUMP RELAY
CHU0114W001
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