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Solution To The Blockage Of The Injector Of Shangchai Generator

Dec. 30, 2021

The fuel injector is one of the important parts of the fuel injector, and the fuel injector is an important part of the fuel supply system. The fuel injector can mix air and fuel accurately. It is like a small spray gun. Fuel is injected into the engine's intake system to mix it with the air entering the engine. If the fuel injector is blocked, it will directly affect the fuel supply system of Shangchai generators, and then affect the normal operation of diesel generator sets. In this article, Jiangsu Starlight Electricity Equipments Co.,Ltd. will tell you what should users do when the fuel injectors of Shangchai generators are blocked. How about fast troubleshooting?


To solve the fault problem, we must first find the cause of the fault, and perform relative maintenance based on the cause, which can get twice the result with half the effort. The following are the main reasons for the blockage of the injectors of Shangchai diesel generator sets. Users can check their own generator sets according to different reasons.


1. The exhaust valve is worn, causing the fuel injector to drip when it stops spraying, so that the spray nozzle burns coke and deposits, causing a stuck fault.


2. The injection pressure is too low, causing the high-pressure gas in the combustion chamber to flow back.


3. Diesel is not clean enough and there are impurities in the high-pressure fuel pipe, which accelerates the wear of the needle valve assembly of the injector, and makes the needle valve assembly not tightly closed. The high-pressure gas in the combustion chamber reverses and burns the needle valve assembly. In addition, the dirt on the injector pressure regulating spring, tappet and other parts is moved to the upper part of the injector needle valve through the injector tappet, or the cotton rope or lead wire used to prevent oil leakage on the oil line enters the sprayer through the high-pressure oil pipe. The oiler will cause the needle valve assembly to jam.


4. The body temperature of the diesel generator is too high, the nozzle is not cooled well, and the valve assembly is stuck. However, too late fuel supply time, excessive scale or blockage of the cooling water channel, wear of the end face of the water pump impeller, and long-term overload of the engine will cause the engine to overheat.


diesel generator

5. When installing the fuel injector, the missing gasket or the gasket is damaged, causing air leakage, causing the local temperature of the fuel injector to be too high and blocking.


6. Reasons for parts manufacturing, such as the fuel injector mounting hole on the cylinder head and the fuel injector are too tight, the gap between the needle valve body and the mounting hole on the cylinder head is too small, the cylinder head fuel injector mounting hole is processed too deep, etc.


There are many reasons for the failure of the fuel injector of Shangchai generators. When you find that your unit has a clear fuel injection pressure lower than the specified value, the fuel injection is not atomized, and the obvious continuous fuel flow is caused by the blockage of the fuel injector. The user should find the cause in time for repairs.


Repair methods for blocked fuel injectors:

Faced with the problem of blocked injectors of Shangchai generator sets. Jiangsu Starlight Electricity Equipments Co.,Ltd. recommends that users first put the stuck fuel injector into diesel or engine oil to heat it, wrap it with a cloth when taking it out, clamp the needle valve with pliers and gradually move it, and take the needle valve out of the needle valve body. Drop a small amount of engine oil into the needle valve body to make the needle valve move repeatedly in the needle valve body. If the needle valve has a burned case on the sealing surface, it should be polished with abrasive paste. Pay special attention to the amount and time of abrasive paste when grinding. Install the cleaned bell valve assembly on the fuel injector, and then adjust the fuel injection pressure.


The above is the reason for the blockage of the fuel injection nozzle of the Shangchai generator and the maintenance method introduced by Jiangsu Starlight Electricity Equipments Co.,Ltd.


When you find that your unit has such a fault, you can find it according to the above reason and deal with it and replace it in time. In order to avoid further damage to the diesel generator set, users should also pay attention to many details when using the diesel generator set daily, and pay attention to inspection to find the problem in time.


Jiangsu Starlight Electricity Equipments Co.,Ltd. is one of the earliest manufacturers of generators and diesel generator sets in China. The company was established in 1974 and the company occupies an area. With an area of 86,000 square meters and a building area of 45,000 square meters, it has 64 sales and service departments across the country to provide users with one-stop service of design, supply, debugging and maintenance at any time. Welcome customers to come to consult and visit. Looking forward to your inquiry, please send email to us for details sales@dieselgeneratortech.com

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