4.3Transmission use and maintenance
The vehicle uses FC6A250PRT automatic transmission
vehicle. The transmission has the following advantages:
Assembly of the overall torsional shock absorber torque
converter, starting smoothly, no clutch wear.
Optimized shift procedures and speed ratio, smooth shift
torque control, protection of the engine and transmission
system to improve fuel economy.
Rear integrated hydraulic retarder to ensure driving safety,
extend the life of wheel brakes, effective cost savings.
Optimized wheel train, low load carrying capacity.
Easy to operate, reduce labor intensity, improve driving
safety.
Reduce vehicle operation and maintenance costs, especially
for poor traffic and driving experience of the driver.
4.3.1Electronic control system
The transmission TCU handles various information of the
vehicle and the transmission and controls the transmission
according to different working conditions of the vehicle and
the working state of the engine. When the gearshift is
required, the TCU will change theclosed-loop control of the
transmission solenoid valve to adjust the clutch pressure.
The electronic control system consists mainly of the
following components：
Transmission control unit TCU;
Sensors: engine speed sensor, torque converter output speed
sensor, transmission output speed sensor, oil temperature and
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