Super Quality Diesel Fuel Injection Pump CW094000-0662 Car Engine Spare Parts

Diesel engines play the role of core power source in many fields, while diesel fuel pumps, as the “heart” of their fuel supply, precisely control the delivery and pressure regulation of diesel fuel. Understanding the working principle of diesel oil pumps is crucial to optimizing engine performance and reducing energy consumption and emissions. Different types of diesel fuel pumps based on a unique design, with a subtle mechanism to ensure a stable supply of diesel fuel in a variety of operating conditions.

The working cycle of plunger type diesel oil pump covers oil inlet, oil pressure and oil return. When the engine is running, the camshaft drives the plunger downward, and the internal volume of the pump chamber increases instantly, forming a low-pressure area. At this time, the inlet valve is opened by the pressure difference, and the diesel fuel in the tank is boosted by the atmospheric pressure and flows smoothly into the pump cavity to complete the oil intake process.
As the camshaft continues to rotate, the plunger began to move up, the pump chamber volume gradually narrowed, the diesel fuel is compressed, the oil pressure rises sharply. Once the oil pressure exceeds the outlet valve opening threshold, the outlet valve opens, and the high-pressure diesel fuel rushes to the injector like a raging torrent, providing precise “fuel ammunition” for the combustion in the engine cylinder.
When the plunger is close to the upper stopping point, the plunger slant groove is connected to the return hole, and the high-pressure fuel in the pump chamber flows back to the low-pressure chamber through this channel, the oil pressure plummets, and the outlet valve closes, ready to meet the next work cycle. Through the plunger stroke and the position of the diagonal groove clever cooperation, precise control of fuel supply, to meet the engine idling, acceleration, full load and other different working conditions.

The core component of the distributive oil pump is the rotating distributive rotor. The rotor rotates at a high speed driven by the drive shaft, and the internal precision oil channels are connected with the injectors of each cylinder in sequence. Fuel is first pumped into the high pressure chamber of the distribution pump from the tank by the low-pressure delivery pump.
When the rotor rotates, its blades are close to the inner wall of the pump cavity under the action of centrifugal force, separating the high-pressure cavity into several sealed working chambers. As the rotor rotates, the volume of the working chamber changes periodically, realizing fuel suction and compression. When a working chamber is connected to the fuel outlet and the corresponding cylinder injector, the high-pressure fuel in the chamber is instantly sprayed out.
At the same time, the distributor pump is equipped with governor and pressure regulator. Governor based on engine speed feedback, real-time adjustment of the oil pump fuel supply, to maintain a stable speed; pressure regulator to ensure that the fuel output pressure is constant, to ensure that the quality of fuel injection atomization, optimize combustion efficiency, and reduce the generation of exhaust pollutants.

Precise realization of the working principle is directly related to the engine performance. Reasonable inlet, pressure, return fuel timing, to ensure a continuous and stable supply of fuel, to avoid engine shaking and power interruptions. Precise adjustment of fuel supply volume maximizes fuel utilization and reduces fuel consumption under different working conditions. Stable injection pressure and atomization effect promote the full combustion of diesel fuel, improve power output, reduce harmful gas emissions, and meet the requirements of environmental protection.

The working principle of diesel fuel pump is a perfect fusion of mechanical precision design and fluid mechanics. Plunger-type and distribution-type oil pumps are unique in their own way, injecting a constant flow of power and vigor for diesel engines. In-depth investigation of their principles for the follow-up pump optimization and innovation, engine performance upgrading to pave the way for a solid road to help the relevant industries in the energy-saving, environmentally friendly, efficient journey sail away.