What is the reason why a diesel generator set cannot produce the specified power?

2024-12-10 16:11:56

Have you ever encountered a problem where a diesel generator set cannot produce the required power during operation? What exactly is going on? Shenyang Ruimaotong Electromechanical Equipment Co., Ltd. will explain to you from four aspects.

1. Malfunctions in the valve train and intake/exhaust systems result in the inability to produce the specified power

Reason: The gap between the intake and exhaust valves and the rocker arm is incorrect; Incorrect valve timing; Valve spring damaged; The valve has accumulated carbon and the sealing surface is leaking air; Air filter blockage; The exhaust pipe and muffler are severely clogged with carbon, resulting in poor exhaust flow.

Solution: Check and adjust to the specified gap; Check and readjust the valve timing; Replace the valve spring; Remove carbon deposits and grind the valve; Clean the air filter; Remove carbon deposits.

2. Insufficient compression pressure leads to inability to produce the specified power

Reason: There is air leakage at the tight fit between the cylinder head and the engine body, which is manifested by a stream of air rushing out from the gasket during shifting, and the large nut of the cylinder head loosening; The cylinder head gasket is damaged. The piston ring is stuck, the valve stem is not flexible, the cylinder head injector hole is leaking air, the copper gasket of the injector cap is damaged, and the plane of the injector hole is not cleaned thoroughly; The joint surface between the fuel injector and the injector body is damaged or leaking.

Solution: Check the joint surface between the cylinder head and the engine body, replace the cylinder gasket, and clean and inspect it. Replace the gasket; Clean the seat hole; Tighten the fuel injector cap or grind the surface.

3. The water temperature is too high, resulting in the inability to generate the specified power

Reason: Overheating of diesel engine (cooling or lubrication system failure).

Solution: Inspect the cooling and lubrication system, remove scale from the water jacket, and clean the oil cooler.

4. Abnormal fuel supply, caused by a malfunction in the fuel system, resulting in the inability to produce the specified power

Reason: Air intake into the fuel system; Fuel injection pump malfunction; The fuel injector has a malfunction.

Solution: Release the air from the fuel system as described above; Repair or replace spare parts; Repair or replace fuel injector components.

Simply put, when the diesel generator set cannot produce the specified power, the intake and injection quantities can be checked first to determine if the compression pressure is sufficient. Based on this, the cause of the fault can be investigated, which is an effective way to solve the problem.