Mash XY400B, Инструкции по эксплуатации, Страница: 49 / 61

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VII
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Engine management system
The Engine Management System(EMS) comprises electronic control unit(ECU), throttle body, Idle speed control valve, fuel pump, fuel injector,
ignition coil, O2 sensor, throttle position sensor, T-MAP sensor, cylinder head temperature sensor and so on. Based on the air flow and engine
speed, the fuel injector and ignition coil are controlled by ECU to get the optimal combustible mixture of fuel and air and Ignition timing which
meet all engine operating conditions. The EMS use sensors to collect parameters such as air flow, temperature of inlet air, cylinder head
temperature, atmospheric pressure and the operation state of engine (rpm, load, acceleration and deceleration). All parameters are
transferred to the ECU with electronic signal. The ECU output controlling signals after input signal are handled. Through the engine and
actuators on the vehicle (ignition coil, fuel injector, Idle speed control valve and so on), the fuel and fire are exactly controlled and corrected
with closed loop. For production conformity, corrected fuelling in order to match up to the difference of vehicles due to the inconformity of
components.
System composition:
1. Sensor:
• Intake air pressure sensor (load information) intake air temperature and pressure sensors
• Throttle position sensor (load information, load range information, acceleration/deceleration information)
• Engine speed sensor (speed information, crankshaft position)
• Intake air temperature sensor (air density information)
• Oxygen sensor (information of the excess air coefficient is more than 1 or less than 1)
2. Actuator:
• Fuel pump relay,
• Fuel pump
• Fuel injector (fuel supply)
• Ignition coil