New High Quality Diesel Injector 238-8091 241-3238 241-3239 241-3400 243-4502 For CAT C7

Pin injector
Advantages
Simple structure: The pin injector has a relatively simple structure, mainly consisting of a nozzle, a pin, an electromagnetic coil and other components. The nozzle structure is relatively strong and not easy to damage, so it has high reliability and stability.
Not easy to clog: The pin injector has a larger spray hole, and the pin moves up and down in the spray hole, which can play a certain self-cleaning role, so it is not easy to be clogged by impurities in the fuel. This makes it have relatively low requirements for the cleanliness of the fuel, and it can work well in some areas with poor fuel quality.
Good injection characteristics: In the early stage of injection, the pin injector has a small opening degree, and the fuel is sprayed at a lower speed, forming a thicker mixture, which is conducive to the cold start of the engine. As the pin opens more, the injection amount gradually increases, which can meet the fuel requirements of the engine under different working conditions.

Disadvantages
The atomization effect is relatively poor: Since the pin injector has a larger spray hole, the speed of fuel spraying is relatively low, and the injection direction is more concentrated, the atomization effect of the fuel is not as good as that of the hole injector. This may cause the fuel and air to be mixed unevenly, affecting the combustion efficiency, and affecting the engine's power output and fuel economy to a certain extent.
Limited injection accuracy: The pin movement of the pin injector has a certain inertia and hysteresis. For the rapid changes in the engine working conditions, its injection response speed is relatively slow, and the injection accuracy is not as high as that of the hole injector. In some engines that require high fuel injection accuracy, the need for precise control of the injection amount may not be met.

Hole injector
Advantages
Good atomization effect: The hole injector usually has multiple spray holes with a small diameter. The fuel is sprayed through multiple small holes at a higher speed, which can disperse the fuel into finer oil droplets and achieve a good atomization effect. This allows the fuel and air to be fully mixed, improves the combustion efficiency, and is beneficial to the engine to increase power output, reduce fuel consumption and reduce pollutant emissions.
High injection accuracy: The solenoid coil and valve core structure of the hole injector usually have a high response speed, and can quickly and accurately control the injection time and injection amount according to the instructions of the engine control unit, and the injection accuracy is high. This enables it to better adapt to the changes in various complex working conditions of the engine and meet the requirements of modern engines for precise control of fuel injection.

Disadvantages
Easy to clog: The spray hole of the hole-type fuel injector is small and easily clogged by impurities, colloids, etc. in the fuel. Once the spray hole is clogged, it will affect the injection effect and cause abnormal operation of the engine. Therefore, the hole-type fuel injector has high requirements for the cleanliness of the fuel, and the fuel filter needs to be replaced regularly and high-quality fuel needs to be used.
Complex structure: The structure of the hole-type fuel injector is relatively complex, and the manufacturing process requirements are high, so the cost is relatively high. At the same time, due to its complex structure, more professional technology and equipment are also required for repair and maintenance, and the maintenance cost is high. In addition, the complex structure may also lead to its relatively low reliability and a relatively high probability of failure.