Deutz Engine Troubleshooting

The efficient operation of a Deutz engine is dependent on the synergy of the intake and exhaust systems. It is vital that the air entering the cylinders is clean. Once the air entering the cylinders is mixed with dust and dirt, the cylinder liners, pistons and piston rings will suffer early wear, the valve stems and guides will be damaged, and even the larger debris may damage the blades of the turbocharger. Because of this, diesel engines are usually equipped with intake air filters to ensure that the air entering the cylinder is pure.

1. Intake air leakage

(1) Intake resistance is too large

Intake resistance will cause the engine to smoke and reduce power. Among them, the air filter element is the key component that affects the intake resistance. Under normal circumstances, the air filter element can be blown three times with compressed air, after which, in order to ensure smooth air intake, it is necessary to replace the new filter element. If not replaced for a long time or cleaned up improperly, the filter element will be blocked by dust, greatly increasing the air intake resistance, resulting in insufficient air into the cylinder, the fuel can not be fully combusted, and then the phenomenon of black smoke, the engine power is also reduced.

(2) supercharged diesel intake pipe leakage

For the supercharged diesel engine, the smoke is too large or power reduction, is likely to be the pressure section of the intake pipe connected to the loose or rubber hose serious air leakage. Loose connection parts of the intake pipe will make the pressurized air leakage in the transmission process, can not be normal pressure into the cylinder, resulting in the cylinder air and fuel mixing ratio is out of proportion, combustion is not sufficient, and ultimately lead to increased smoke, power reduction.

(3) Air leakage detection method of intake system

Detection of air intake system leakage, in addition to the naked eye to carefully observe the connection parts with or without gaps, damage, but also with the help of soap foam for inspection. Soap foam evenly coated in the possible places of leakage, such as the connection of the intake pipe, rubber hose interface. If there is a leak, the soap foam will produce bubbles due to gas leakage, and this method can more accurately locate the leakage point.

2. Failure of exhaust part

(1) Exhaust pipe and supercharger exhaust leakage and resistance problems

It is critical to check the exhaust condition of the exhaust pipe and supercharger. Gasket leaks and increased resistance in the exhaust pipe as well as the muffler can cause a number of problems. Exhaust leaks and increased resistance will result in a reduction in supercharger speed, which in turn reduces the amount of air pressed into the cylinders, lowering the intake pressure of the diesel engine and ultimately resulting in an increase in exhaust smoke and a decrease in power. Exhaust leakage can usually be judged by listening to the sound, the leakage will emit a clear sound of leakage; can also be observed, high temperature gas will make the material near the leakage discoloration. When the exhaust is obstructed, the turbocharger can not work effectively, and its impact on the engine power reduction should not be underestimated. For example, serious carbon deposits in the exhaust pipe or damage to the internal structure of the muffler will increase the exhaust resistance.

(2) Problems caused by supercharger failure

When the supercharger fails, it reduces its boosting effectiveness, which leads to a decrease in diesel engine power and an increase in smoke. The supercharger plays an important role in the engine work to enhance the intake pressure and increase the intake volume. Once the supercharger fails, such as internal impeller damage, bearing wear, etc., it will not be able to properly pressurize the air, so that the amount of air entering the cylinder is insufficient, the fuel combustion is not sufficient, and the diesel engine's power performance and emission indexes will be seriously affected.

(3) Supercharger oil leakage

Diesel engine oil with its working oil pressure through the inlet pipe to supply the supercharger to lubricate the bearings and provide some cooling, the return pipe is connected to the bottom of the middle shell of the supercharger, the oil along the return pipe back to the sump of the diesel engine. The supercharger rotor section has sealing rings at each end, whose primary function is to prevent exhaust and pressurized air from entering the supercharger's intermediate case. Although oil leakage from the sealing rings is less common, it can still occur. If the crankcase pressure is too high, it will obstruct the supercharger oil return and cause the oil to fill the intermediate case, which in turn will blow into the diesel engine cylinder with the pressurized air through the compressor sealing ring. Obstructed or damaged supercharger return lines can cause an increase in oil pressure in the intermediate case, causing the oil to flow along the sealing ring to the compressor or turbine intake volute. High intake and exhaust resistance can create a vacuum between the compressor and supercharger housing, which can also cause the sealing ring to leak oil. To check for this type of problem, remove the turbo exhaust pipe and the compressor outlet pipe to see if there is oil leaking from the sealing ring.

(4) Intake and exhaust system leakage noise problem

When the intake and exhaust system of Deutz engine leaks gas, it usually produces additional noise, which is usually manifested as a sharp whistling sound. This noise is generated by the high speed flow of gas at the leak, and the source and characteristics of the noise can also help the maintenance personnel to quickly determine the possible location of the leakage in the intake and exhaust system.

In short, Deutz engine intake and exhaust system troubleshooting requires maintenance personnel to comprehensively observe, carefully detect, from intake to exhaust of each link one by one, accurately find out the cause of the failure, timely repair, in order to protect the normal operation of the engine. If you want to know more about Deutz engine troubleshooting expertise, please go to our official website.