The control module of the diesel generator set is equivalent to a computer board, which can receive external signals and issue commands such as start, stop, and alarm. During the start process of the diesel generator set, the control module will monitor the engine speed, oil pressure, generator voltage, and frequency. If a certain parameter fails to meet the set requirements, the control template will take alarm and shutdown measures to protect the engine and generator. This article will introduce how the control module of a diesel generator set affects the start of the diesel generator set.

1. The control module of the diesel generator set monitors the real-time status of the mains power. When the mains voltage is detected to be lower than the set value of the module, the mains power outage sign is established, and the control module I/O output password sends a voltage signal to the engine ECU to execute the start command. If the unit control module fails or the mains power input signal is unreasonable, it cannot output the start signal, resulting in the unit being unable to start.

2. After receiving the start signal, the ECU conducts a power on self-test and, in the absence of electrical or mechanical faults, the starter engine starts. When the engine reaches the set speed, under the action of compression, the temperature in the cylinder continues to rise to the combustion temperature of diesel. The atomized diesel is ignited, pushing the piston to move repeatedly, and the engine is successfully started. If the battery voltage is insufficient or the matching battery wire diameter is too small during the startup process, it may cause the starter speed to be too low, directly affecting the normal start of the engine.

3. When the engine enters idle mode, the control module monitors the engine speed and oil pressure parameters to determine whether the engine has entered running mode. If the engine speed is lower than the minimum operating speed set by the module or the oil pressure value is lower than the minimum pressure set by the module, the unit control module determines that the engine has not been successfully started, and directly disconnects the ECU power supply to shut down the protection.

4. When the engine reaches the rated speed, the unit control module will judge the voltage and frequency status of the generator. Taking a unit with a rated voltage of 400V and a frequency of 50HZ as an example, if the operating voltage is not within 400V± 10% or frequency not within 50Hz± Within a range of 6%, it is determined that the power generation of the unit is abnormal, and the control module executes a shutdown command.

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