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What is Generator Common Rail Technology?

Jul. 29, 2022

Today, we will briefly introduce what is common rail technology for generators and why we use common rail technology.

diesel power generator

In a high-speed diesel engine, the high-speed operation makes the diesel injection process only a few thousandths of a second. Experiments have shown that the pressure of the high-pressure oil pipe varies with time and location during the injection process. Due to the compressibility of diesel and the pressure fluctuation of diesel in the high-pressure oil pipe, the actual fuel injection state is quite different from the plunger fuel supply rule specified by the fuel injection pump.

The pressure fluctuation in the generator oil pipe sometimes causes the pressure in the high-pressure oil pipe to rise again after the main injection, reaching the pressure that opens the needle valve of the injector, and reopens the closed needle valve to produce a secondary fuel injection phenomenon. . Since the secondary injection cannot burn completely, it increases smoke and hydrocarbon (HC) emissions, and fuel consumption increases. In addition, the residual pressure in the high-pressure fuel pipe will change after each injection cycle, which will cause unstable injection, especially in the low-speed area, which is prone to the above phenomenon. Phenomenon. In order to solve this problem of diesel engine's fuel pressure change, modern diesel engine adopts a technology called "common rail".

Common rail technology refers to a fuel supply method in which the generation of injection pressure and the injection process are completely separated from each other in a closed-loop system composed of a high-pressure fuel pump, a pressure sensor and an ECU. The precise control of the oil pressure in the common oil supply pipe makes the pressure of the high-pressure oil pipe independent of the engine speed, which can greatly reduce the change of the diesel engine oil supply pressure with the engine speed, thus reducing the defects of the traditional diesel engine. The ECU controls the fuel injection volume of the injector, and the fuel injection volume depends on the pressure of the fuel rail (common fuel supply pipe) and the length of the solenoid valve opening time.

Diesel turbochargers are familiar to everyone. The supercharged intercooling technology is when the turbocharger compresses the fresh air to be cooled by the intermediate cooler, and then flows to the cylinder combustion chamber through the intake manifold and intake valve. Effective intercooling technology can reduce the intake air temperature to below 50 ℃, which helps to reduce exhaust emissions and improve fuel economy.

Starlight Power has advanced testing equipment, modern production technology, professional manufacturing technology, perfect quality management system, and strong technical research and development capabilities. It can provide 3KW~2500KW various specifications of ordinary, automatic, four protection, automatic switching, low noise and mobile generator sets, high quality and low energy consumption to meet the diverse power needs of customers, and can also meet users with different voltages and different frequencies. It is required to create a parallel power supply system for multiple units. If you are interested in our product or any question on generator, welcome to send email to sales@dieselgeneratortech.com.

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