Knowledge of diesel engine fuel system

Knowledge of diesel engine fuel system

The fuel supply system of the diesel generator set is generally composed of the fuel storage system, fuel transport system, and fuel filtration system. Let me introduce you to the fuel system of the diesel generator set.

Fuel Storage Box

The main tank is a large oil tank that stores fuel, and the general fuel is transported from the main tank to the smaller auxiliary tank or directly to the engine. The diesel engine will pressurize a certain amount of clean diesel at an appropriate time and spray it into the combustion chamber with appropriate law. The injection timing and injection amount of each cylinder are the same and adapt to the operation condition of the diesel engine. Injection pressure, injection atomization quality, and its distribution in the combustion chamber are suitable for combustion chamber types. Diesel generator in each working cycle, each cylinder of the generator is sprayed with oil once, and the injection order is consistent with the working order of the cylinder. According to the change of diesel load, the circulation oil supply is automatically adjusted to ensure the stable operation of the diesel engine, especially to stabilize idle speed and limit speed. Store a certain amount of diesel oil to ensure the normal generation of diesel generator diesel.

Composition

Diesel generators are either early direct pump fuel injection systems or modern electronic fuel injection systems (including electronic control monomer pump system, electronic control distribution pump system, and other electronic fuel injection systems), Its engine fuel system is basically composed of: an injector, injector, high-pressure tubing, oil pump, fuel filter, and other components.

 

Knowledge of diesel engine fuel system

 

Main Components

For the electronic high voltage common rail fuel injection system, the main components of the fuel system are high-pressure common rail pipe, ECU, and related sensors (such as crankshaft speed sensor, camshaft position sensor, rail pressure sensor, flow limiting device, etc.), actuator parts, etc. Deutz engine has a high voltage common rail fuel injection system. In LandKingParts we sell Deutz engine parts and accessories for commercial vehicles, construction machinery, forklifts, farm machinery, compressors, generator sets, and ships. Deutz engine has superb quality if there is a need, welcome to consult to buy.

Function

The diesel engine will pressurize a certain amount of clean diesel at an appropriate time and spray it into the combustion chamber with appropriate law. The injection timing and injection amount of each cylinder are the same and adapt to the operation condition of the diesel engine. Injection pressure, injection atomization quality, and its distribution in the combustion chamber are suitable for combustion chamber types.

Diesel generator in each working cycle, each cylinder of the generator is sprayed with oil once, and the injection order is consistent with the working order of the cylinder.

According to the change of diesel load, the circulation oil supply is automatically adjusted to ensure the stable operation of the diesel engine, especially to stabilize idle speed and limit speed.  Store a certain amount of diesel oil to ensure the normal generation of diesel generator diesel.

 Common Fault Diagnosis And Treatment

Each generator set user should pay attention to the immediate maintenance of the generator, and the oil products of diesel oil should be especially careful, not to use unqualified diesel or oil, so as not to cause loss. Common fault diagnosis and treatment of diesel engines related to fuel supply systems   Diesel engine does not have enough power, or diesel engine works for a period of time after automatic shutdown.

The reasons for this fault related to the fuel supply system are as follows:

Cause 1. Oil leakage of plunger and oil outlet valve of the injection pump, the low oil supply pressure of injection pump, insufficient oil supply;

Treatment: remove the injection pump for adjustment inspection, and replace the plunger and oil outlet valve joint if necessary.

Cause 2. Bad atomization of injector, oil drop, nozzle damage, or improper thickness of injector seal gasket;

Treatment: remove the injector for adjustment inspection, and replace the nozzle or gasket if necessary.

Cause 3. Insufficient pressure of low-pressure oil pipeline, the main reason is that the low-pressure oil line return screw one-way valve of the injection pump is not close or damaged, resulting in strict sealing;

Treatment: check the low-pressure oil path of fuel and replace the return valve or pipeline parts when necessary.

Cause 4. Oil pump damage, too low fuel pressure;

Treatment: remove the oil pump for inspection, and replace the oil pump when necessary.

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