With the increasing emphasis on environmental protection and the gradual tightening of emission restrictions on diesel generator sets, the traditional mechanical fuel system engine is gradually replaced by an electronically controlled engine that precisely controls fuel injection. QSK38 is one of the mature electronically controlled engine members of the 100K CCEC generator set. In many fields such as high-quality power stations/backup power, oil and gas field exploitation, mobile power vehicles, etc., the QSK38 engine has withstood the test of the market for decades and has been well recognized by customers.

The CCEC engine, which was put on the market decades ago, has gradually entered a larger maintenance interval. The long-term operation causes the components and systems of the engine to begin to age, and various failures begin to appear gradually. 1000KW Cummins generator manufacturer The QSK38 engine discussed this time is equipped with two electronic control units (ECM), the master (control) and the slave (slave), so that the design idea of ​​the two electronic control units working together is to use mature and reliable ECM for vehicles, master and slave ECM. Hardware can be interchanged, greatly improving the versatility of parts and the availability of accessories for maintenance.

The main responsibilities of the 1000KW engine QSK38 master control ECM are to be responsible for the calculation of external power requirements, the perception and calculation of the environment and engine state, the calculation of combustion state, the system-level fault diagnosis, and the control of the injector and its faults on the left bank of the V-type engine. diagnosis, etc.

The main responsibility of the CMI engine QSK38 slave ECM is to perform the main control ECM’s injection fuel quantity, fuel injection timing, fuel injector fault diagnosis and so on to the right bank of the V-type engine.

There is an interdependent relationship between the master (control) and slave (slave) dual ECMs. To maintain such a cooperative work, rely on Cummins’ customized communication lines and protocols (private, not open to the outside world) to transmit the above control instructions and information. Judging from the work responsibilities of the two ECMs, problems with any one of the ECMs and their subsystems may lead to engine failure, which is easy for Cummins maintenance masters to ignore
What is omitted is the communication failure between the master (controller) and slave (slave) dual ECMs.

Once the information transmission between the master (control) and slave (slave) dual ECMs cannot be carried out normally, it will cause the engine to fail to start and run, which will have a great impact on the entire equipment. Once the aforementioned fault occurs in the CCEC generator set, the engine QSK38 master (controller) will automatically identify the fault and actively send fault information to the control instrument and fault indicator.