● Reset mode:
When the ECU receives a reset command or faces a serious problem, the system enters into
the reset mode. All I/O interface is reset to the predefined state and enters into normal working
conditions after the reset is finished.
● Overvoltage/counter-voltage:
ECU, which works under overvoltage of 24V for no more than 1 minute, will not be
damaged. ECU, which works under counter-voltage of 14V for no more than 1 minute,
will not be damaged.
17.2.1.7
Working temperature
● Normal working temperature range: -22°F to 158°F
● Maximum working temperature: 176°F (continuous work for no more than 30 minutes)
● Storage temperature range: -40°F to 185°F
17.2.1.8
Maintenance and repair
The controller cannot be maintained after sale. When there are any problems, make sure
whether it is caused by calibration or software first. If it is caused by calibration or software, update
the calibration software. If any controller hardware fails or is damaged during the warranty period,
the controller must be sent back to the factory, attached with detailed controller component
number, serial number, vehicle type, date of production, accumulated miles, where used, and
date of return.
17.2.2 Fuel injectors
17.2.2.1
General working principle:
The fuel injector is designed with an electromagnetic coil around an iron core inside. Two
electrodes from the electromagnetic coil are the input control interface of the fuel injector. When
the coil is connected to power, the electromagnetic attraction suppresses spring force and fuel
pressure of the ball valve, and raises the valve. Thus, high-pressure fuel in the fuel pipe (250～
400kPa) runs through the valve seat hole and the orifice plate, forms a cone-shaped fog and injects
it to the intake valve. After the injector is disconnected, the magnetic force of the electromagnetic
coil vanishes automatically, and the ball valve of the fuel injector closes automatically under the
action of the return spring, which stops fuel injection.
17.2.2.2
Appearance of the fuel injector:
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