Fuel Injection Pumps 490-5709

Fuel injection pump is an important part of automobile diesel engine, it is the most important part of diesel engine and is regarded as the “heart” of diesel engine. It plays a key role in injecting fuel into the combustion chamber of the engine in an efficient and precise manner. This article will take fuel injection pumps 490-5709 as an example, from the working principle of fuel injection pumps, components, function and application scope of the four aspects for your detailed introduction.

1. Principle of operation

The working principle of a fuel injection pump is based on the reciprocating motion of the plunger in the plunger sleeve. This movement is usually driven by the camshaft of the engine, and the rotation of the camshaft causes the plunger to move up and down in the plunger sleeve, thus realizing fuel suction, pressurization and injection.

Suction process: When the plunger is located in the lower position, the oil hole on the plunger sleeve is opened, and fuel flows into the pump chamber from the low-pressure oil chamber. At this time, the volume of the oil cavity increases and the pressure decreases, which facilitates the suction of fuel.

Oil pressure process: With the rotation of the camshaft, the plunger is pushed up, the volume of the pump chamber decreases and the pressure increases. When the plunger completely blocked the oil hole, the pressure in the pump chamber increases rapidly, and when this pressure overcomes the spring preload of the outlet valve, the outlet valve opens, and the high-pressure fuel is pressed into the high-pressure oil pipe, and eventually injected into the cylinder through the injector.

Fuel return process: when the plunger continues to rise and the slanting groove on it is connected with the oil hole on the plunger sleeve, the high pressure fuel flows back to the low pressure oil chamber through the slanting groove and oil hole, and the pumping process ends.

2. Components

The fuel injection pump is mainly composed of the following parts:

Camshaft: responsible for driving the plunger for reciprocating motion.

Roller body: fits with the camshaft to reduce friction and wear.

Plunger and Plunger Bushing: Plunger reciprocates inside the plunger bushing to complete the suction and compression of fuel.

Plunger spring: Provides the spring force for the plunger to return to its original position.

Outlet Valve and Valve Seat: Controls the flow of high pressure fuel.

Rotating sleeve and ring: used to adjust the rotation of the plunger to change the amount of fuel supplied.

In addition, fuel injection pumps may include accessories such as governors, advance devices, etc., which are used to adjust the fuel supply and injection timing according to the engine conditions.

3. Role and function

The main roles and functions of the fuel injection pump in the diesel engine include the following:

Timed and quantitative fuel supply: the fuel injection pump can precisely control the fuel injection volume and injection moment according to the engine's working conditions and demand. This ensures that the engine can obtain the best fuel supply under various working conditions, thus improving the engine's power performance and fuel economy.

Constant-pressure fuel supply: The fuel injection pump pressurizes low-pressure fuel to high pressure, ensuring that the fuel is sprayed evenly into the cylinders as a mist. High-pressure injection helps fuel and air mix well, improving combustion efficiency.

Adaptation to different loads: The fuel supply from the fuel injection pump can be adjusted within the range of maximum fuel supply (full load) to zero fuel supply (stop). This ensures stable engine operation under different loads.

4.Application scope of Fuel injection pumps 490-5709

Fuel injection pumps are widely used in all kinds of diesel engines, especially in the fields of automobiles, construction machinery, ships and generator sets.

Automobile field: In heavy-duty trucks, buses and other medium-sized cars and above, in-line fuel injection pumps are widely used because of their stable fuel supply and high reliability. In cars and light-duty vehicles, distributive fuel injection pumps are more popular because of their small size, light weight and simple structure.

Construction Machinery: Excavators, loaders and other construction machinery usually need to operate in complex and changing operating environments, with high requirements for engine power performance and fuel economy. Fuel injection pumps can accurately control the fuel supply to ensure the stable operation of construction machinery under various working conditions.

Marine field: Marine engines are usually powerful and require high precision and stability of fuel supply. Fuel injection pumps can meet this demand and ensure the power supply of ships under various sailing conditions.

Generator sets: Generator sets need to run stably for a long time, which requires high reliability and economy of fuel supply. Fuel injection pumps can ensure the stable operation of generator sets under various loads and reduce fuel consumption.

With the continuous development of technology, the performance and reliability of fuel injection pumps are also improving, providing a strong guarantee for the efficient and stable operation of diesel engines. Whether in the field of automobile, construction machinery, ships or generator sets, fuel injection pumps play an irreplaceable role.Keluo Construction Machinery is a reliable deutz engine supplier, producing and selling various types of fuel injection pumps, which include fuel injection pumps Keluo Construction Machinery is a reliable deutz engine supplier, which produces and sells various types of fuel injection pumps, including fuel injection pumps 490-5709, we have strong production capacity and perfect after-sales service, if you want to buy related products, please feel free to contact us.