14 - 53
ELECTRICAL SYSTEM
A
B
FUEL INJECTOR
The fuel injector provides fuel to the engine and atomizes it within a specified time according to the
instruction of the ECU.
The fuel injector (see A in the fi gure below) is installed on the electronic throttle body, and the other end
is connected to the fuel pipe through the injector rail (see B in the fi gure below).
working principle
The ECU sends out electrical pulse signals to the injector coil to form a magnetic field force.When
the magnetic fi eld force rises enough to overcome the combined force of the return spring pressure,
the needle valve's gravity and the friction force, the needle valve begins to rise and the fuel injection
process begins.The maximum lift of the needle valve does not exceed 0.1mm. When the fuel injection
pulse is cut off , the pressure of the return spring causes the needle valve to close again.
To Next Page
Loading...
