What is the key point of common rail test bench

17 May 2022

The most important thing about the common rail test system is the accuracy and repeatability of the test data.

During the common rail test, the oil return volume increases with the increase of oil temperature, and other test data are more accurate.

Repeated test accuracy, the electronically controlled diesel engine can perform 1-6 fuel injections per working cycle, and has high requirements for fuel injection time, which can be accurate to a few microseconds. A good test equipment should be able to accurately test the common rail Accurate test of the fuel injection response time and fuel injection volume of the injector, and the fuel injection response time and fuel injection volume of the pump nozzle. It can generate a QR code from the measurement data and feed it back to the ECU for automatic adjustment or manual adjustment. It can be compared with the measured data of Bosch equipment, repeating more than 3 times, the equipment with the smallest test error is the equipment with high precision.

The precision of the injection and combustion of the diesel engine in the cylinder and the supporting components have high requirements for the injection quantity. However, due to the oil temperature, oil pressure, response time, pulse width, fuel density, combustion value, lubricity, fluidity, etc. The amount of oil has an impact, so the requirements for the equipment are also very high in terms of oil pressure stability and oil temperature stability. There are many factors that affect the stability of oil pressure, such as common rail pumps, common rail pipes, filters, pressure regulating valves and other important components. Therefore, the quality of the supporting components is very important for the equipment to meet the testing standards, and they determine the reliability of the equipment.

Crystal is a professional common rail test bench manufacturer, providing high precision test benches. For example, HCR918 high pressure common rail electronic control system comprehensive test bench: adopts a fully automatic control system, which can easily perform electronic control common rail injectors (including piezoelectric common rail injectors) and high voltage electronic control common rail pumps, Testing and maintenance of electronically controlled unit pumps, electronically controlled pump nozzles, HEUI injectors, HEUI actuation pumps, etc. Thousands of models of electronically controlled fuel injectors, high-voltage electronically controlled common rail common rail pump and electronically controlled units can be tested, including BOSCH, DELPHI, DENSO, SIMENS, CATERPILLAR, CUMMINS (DONGKANG, FUKANG), etc. Pumps, electronically controlled pump nozzles, HEUI injectors, HEUI actuation pumps, complete test data.

The test system adopts high-precision gear flowmeter, high-precision oil quantity measurement system, remote control service, free software upgrade, WIFI connection, multiple languages, and more than 7000 kinds of standard data.

High-strength universal joint and protective cover: The coaxiality between the main motor drive shaft and the high-pressure common rail pump is super high, which makes the test process more stable, safe and low-noise.

Please feel free to contact us if you are interested our test bench.