Diesel engine fault diagnosis is one of the difficulties in diesel engine maintenance and service work. has informed long-term practice and explored a set of ideas and basic methods for generac diesel generator faults. The introduction is as follows:
Familiar with the structure of the diesel engine is the basis for fault diagnosis In order to carry out fault diagnosis of generac diesel generator, you must first be familiar with the basic structure and working principle of generac diesel generator When generac diesel generator failure, it is important to know the basic configuration of the diesel generator, such as whether the fuel system of the generac diesel generator is electronically controlled or mechanical, whether it is a mechanical unit pump or a distribution pump, whether it is an electronically controlled high-pressure common rail or an electronically controlled Unit pump, etc. In addition, it is also necessary to know the common technical parameters of the diesel engine, such as valve clearance, fuel supply angle, circulating fuel supply amount, fuel injection pressure, etc.
Diagnose the fault location based on the fault phenomenon and characteristics
When a diesel generator fails, whether it is a simple fault or a complex fault, it will inevitably appear in a certain form. If you carefully find out the phenomena and characteristics of the fault, it is not difficult to find the root cause of the fault, and then use corresponding methods to eliminate it.
Basic ideas for finding the cause and location of the fault
For a generac diesel generator, methods such as “asking, watching, listening, touching, and smelling” are often used to determine the specific location of the fault.
Q: It is mainly by asking the operator whether there are abnormal sounds, smoke, odor and other abnormal conditions when the fault occurs, and then further targeted diagnosis, which can greatly save time and improve the accuracy of generac diesel generator fault diagnosis.
Look: It is to carefully observe the readings of various instruments, the changes of exhaust smoke color, water and oil, etc. Whether the parts of the diesel engine are broken and deformed, whether the fasteners are loose, separated or fallen off, and the relative assembly of each part. Is the location correct, etc.
Listening: A slender metal rod or a wooden handle screwdriver is used as a “stethoscope”, and the “stethoscope” is used to touch the corresponding part of the outer surface of the generac diesel generator to “listen” to the sound of the moving parts and understand its changes.
Touch: It is to check the working conditions of parts such as the valve train and the vibration of parts such as high-pressure oil pipes and injectors by the feeling of the hand.
Smell: It is the sense of smell. Smell out whether the diesel engine smells abnormally to diagnose the specific location of the fault.
Diagnose faults with modern testing equipment
When diagnosing diesel generator faults, modern testing equipment should be used as much as possible to help improve the efficiency and accuracy of fault diagnosis.
Some emergency measures
When the generac diesel generator fails, some faults cannot be diagnosed clearly at once, and these faults may develop. In order to prevent the occurrence of major accidents, the diesel engine must be reduced in speed or turned off before further diagnosis. Immediately use the method of cutting off the oil, cutting off the gas or increasing the load to turn off the generator set, because when the diesel engine is in a speeding state, the parts of the diesel engine are worn out, and the service life is sharply reduced.