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Inspection Method For Insufficient Power Of Diesel Generator Set

Jul. 27, 2022

The main feature of insufficient power of diesel generator set is the unstable operation at low speed, black smoke and abnormal sound from the exhaust pipe at high speed. When the diesel generator set has not reached the overhaul period, the lack of power is mainly caused by the failure of the fuel supply system and the insufficient compression force of the cylinder. The following Jiangsu Starlight Electricity Equipments Co.,Ltd. will introduce to you the inspection method for the cause of insufficient power of diesel generator sets:

 

1. Check the empty car first. If you increase the accelerator and the empty car can reach the maximum speed, the fault is in the working machine. If the idle speed does not go up, the fault lies in the diesel generator.

 

2. Check the temperature at the root of the exhaust manifold. If the temperature of a certain cylinder is low, the cylinder does not work or does not work well. Fingers can be used for touch inspection at low speed, but not at high speed to prevent fingers from being scalded. At this time, you can spit saliva to the root of the exhaust manifold. If the saliva does not make a "squeak" sound, the cylinder is faulty.

 

3. Pinch the high-pressure oil pipe with your fingers. If the pulsation is strong and the temperature is higher than other cylinders, it means that the oil pump is good, and the fuel injection nozzle may be stuck in the fully closed position or the pressure of the pressure regulating spring of the fuel nozzle is too high. If the pulsation of the high-pressure oil pipe is weak and the temperature is the same as that of other cylinders, it means that the fuel injector is stuck in the fully open position or the pressure regulating spring is broken. If the high-pressure oil pipe has no pulsation at high speed, and the temperature is higher than other cylinders, it means that the high-pressure oil pump is faulty. If the exhaust pipe emits smoke rings at low speed, it means that the spring of the oil outlet valve of the high pressure oil pump is broken or the gasket is invalid. If the fuel system has no abnormal symptoms, the fault is poor cylinder compression.

 

diesel generator


4. During operation, if the blow-by gas increases under the oil filling port and the ambient oil smell is strong, the gap between the piston and the cylinder is too large and the sealing is poor. If you use a screwdriver to move the flywheel for two weeks when parking, and the number of times of increase in hand resistance is not equal to the number of cylinders, you can judge the poor compression of a certain cylinder according to the hand feel. If there is a leaking sound at the junction of the cylinder head and the cylinder block, the ambient smoke is thick, and there is a smell of smoke, it means that the cylinder head gasket is leaking. If there is a metal knocking sound at the cylinder cover, and it is related and regular with the speed, it means that the gap between the rocker arm and the valve is too large. If there is a leaking sound at the cylinder head, the temperature at the root of the intake manifold is high at low speed, and there is a leaking sound at the intake pipe when parking, it means that the intake valve is leaking. If the exhaust pipe emits black smoke at high speed, and the exhaust pipe spit flame tongue at night, it means that the exhaust valve is leaking.

 

When the diesel generator set has insufficient power, the user can check according to the above method. If there are other technical questions about the diesel generator set, please consult Jiangsu Starlight Electricity Equipments Co.,Ltd.

 

Jiangsu Starlight Power Generation Equipment Co., Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Starlight has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.


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