Views: 1 Author: Site Editor Publish Time: 2022-11-02 Origin: Site
The equipment of the American company Cummins is deservedly considered the standard of reliability and quality in the modern automotive market.
Thanks to the latest developments, the technical capabilities and service life of engines and their components surpass all existing analogues. Motorists especially appreciate fuel pumps of this brand.
The fuel system is the most complex element of the engine and the undoubted leader in this industry is Cummins.
Pumps of this brand are manufactured according to the latest technical developments that correspond to the world level of safety. Promising fuel pumps and injectors from the Common Rail line are especially in demand. Thanks to the highest possible efficiency, they significantly limit the emission of toxic gases and produce very little noise.
According to experts, the Kamens fuel pump can be confidently classified as a new generation of equipment, the improvement of which is constantly being worked on by the company's designers. Their efforts are aimed at increasing capacity, reducing fuel consumption, and bringing them into line with the latest environmental protection requirements.
These systems are designed for diesel engines. They are also convenient in that they allow for prompt repair and replacement of damaged parts, which significantly reduces the cost of maintaining the engine.
But even if the pump is outwardly similar and seems suitable for the engine, this does not mean at all that it is acceptable for installation on this motor. The engine will also work with a pump that is not quite suitable, however, the solarium will turn out to be either richer or poorer than the standard, which threatens to disable the most important components of the engine, including the crankshaft, piston system and cylinder block.
In addition to the part code, information about the type of pump is included in the calibration of the pump, which you should pay attention to when purchasing a new device.
Since the Cummens engine is installed on equipment with completely different purposes and power, pumps for pumping fuel in them also come in different types: in-line multi-plunger, with pump nozzles, distribution and Common Rail.
High pressure fuel pumps in in-line multi-plunger systems gradually pump diesel fuel into the injector lines, which open in the presence of high pressure and close in its absence.
The advantages of the system are high reliability, undemanding to the composition of the fuel and ease of repair. Sometimes it is enough to replace the plow pairs and the atomizer. The scope of such injection pumps is cummins A2300, B-5.9, B-6.8, B-8.3.
Single-plunger high-pressure fuel pumps form a significantly more powerful pressure when injecting a solarium than other analogues. This gives more opportunities for savings and reducing emissions of harmful gases. In such pumps, the supply system is equipped with one distributor, which progressively pushes the diesel oil and pushes it rotationally onto the nozzles.
They are compact and deliver fuel very evenly to the cylinder system. However, these pumps require only high quality fuel, as they cannot be repaired and must be replaced in the event of a malfunction.
The pump-injector system consists of a combined plunger pump and nozzle and is mounted on the head of the engine block. They are driven by camshaft cams. The injection and draining of the solarium in them is carried out through special channels in the block body.
Controls the operation of the pump-regulator system or an electronic unit. The advantage of the pump is that, due to the cycling of the fuel supply, the engine runs much softer with it, which means it keeps working longer. It is also important that much less toxic substances are emitted into the air.
Repair of such a pump is possible, but all components are replaced in it, except for the housing. Therefore, it turns out to be very expensive, almost equal in price to a new product. The pump is installed on Cummens KTA-19, KTA-50, NT-855 and VTA motors.
On engines with medium and low power , a newcomer has recently been confidently leading - Common rail pump . The principle of its operation is that the solarium is fed through a single line to piezoelectric or electromagnetic nozzles.
After a signal from the electrical control module, the nozzles open and the solarium is pushed under powerful pressure into the cavity of the combustion chamber. The peculiarity of such a pump is to create only powerful pressure in the section of the fuel line (ramp).
The weak point of the pump is that it cannot be repaired, but only replaced with a new one. Therefore, for all the unpretentiousness of the Cummens Common Rail fuel pump, the quality of diesel fuel still has to be controlled. Are completed with such TNVD Cummins ISF 2 8, ISB and QSB.
The pros and cons of pumps will help determine which one is suitable in each case.
Fuel pump repair Cummens
Qualitatively repair the fuel system of the engine of the popular Cummins DongFeng brand only highly qualified professional masters are capable of. During the diagnostics, they determine the parameters, the level of which is different from the permissible value. In this case, the compression limit pressure is checked.
The determination of the lubrication pressure is also not left without attention. These characteristics provide grounds for localizing the problem. With such diagnostics, the operation of the engine, injectors and fuel pump is checked.
lso detached:
accelerator (gas cable);
branch pipe of the hydraulic booster of the steering system;
cooling system hoses;
diesel hoses;
filters, air duct and wiring.
Be sure to disassemble the engine, including attachments. Dirt, waste oil, sand and soot are removed from all parts. The fuel system itself does not have to be completely disassembled.
Each nozzle is checked separately, since the problem of fuel supply often lies precisely in the area of \u200b\u200bthe nozzle connectors. In this case, the Cummins DongFeng engine nozzles are restored or completely replaced.
The cause of the malfunction sometimes also lies in the fact that air enters the fuel pump, which simply stops pumping fuel. Air is removed by mechanical pumping. Sometimes a problem occurs due to dirt that has accumulated between the walls of the pressure reducing valve and the fuel rail. Repair in this case consists in its removal.
During such repairs, the parameters of all parts in the system should be checked. This will help determine the degree of wear and tear and eliminate the possibility of hidden cracks and scratches. Rotating elements must always be checked for alignment and runout. After such a check, a list of components for replacement is formed. When installing a new fuel pump, it is necessary to simultaneously replace the filters - fueland mesh
Of course, any unit needs maintenance. But if this is a fuel pump from Cummens, then the car owner will have to spend much less time and money on it, but the return on his work will be rewarded a hundredfold.