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How To Ensure The Accuracy Of High Pressure Common Rail Test Bench

September 30, 2019

The inertia of the flywheel selected for different types of high power common rail test benches of different powers should be different. We have conducted rigorous calculations and experiments on model and power. The final determination of the inertia of the flywheel is very scientific and practical, and each flywheel has been subjected to dynamic balance and static balance experiments prior to installation, thus ensuring more effective testing. Taiwan's instantaneous speed.

The last thing to be determined in the transmission system of the high pressure common rail test bed is the oil pump coupling. The standard of the International Standards Organization recommends that the rigidity of the test bed drive coupling must be sufficient to prevent any resonance state from occurring, and the fuel injection on the test bench at the same time The maximum allowable load value should not cause the total drive to exceed 0.14 degree deviation.

In the design of the high pressure common rail test bench coupling, there is a very important requirement, that is, the coupling can withstand the impact of the rear impact, because if it can not meet this, it will affect the oil supply of the tested fuel injection pump. the amount. Couplings designed by us can meet the above requirements and can also compensate for the high center error of the test bench due to long-term use, ensuring the accuracy of the test bench. When the above requirements are met, a complete high-pressure fuel pump test bench drive system is designed.

Matters needing attention when using high pressure common rail test bench

First of all, we must fully prepare for the experiment. Familiar with the experimental content, master the experimental steps. When conducting experiments, strictly follow the experimental procedures to prevent fires caused by non-standard operations. Strictly abide by the discipline of the laboratory, prohibiting playing in the laboratory, playing slapsticks, and preventing the breaking of equipment to cause fire. It is forbidden to play with lab equipment and medicines that are not related to the experiment, especially electric heating equipment.

It is strictly forbidden for people, especially children, to enter the laboratory to prevent fires caused by illegal activities of unrelated personnel. It is forbidden to live in the laboratory, and it is even more important to not use domestic fires in or near the laboratory. In particular, it is not allowed to use open flames, and it is even more difficult to burn fireworks and firecrackers to prevent fires in combustibles and other flammable materials inside the pilot. Attention to the proper use and storage of the electric heating apparatus of the high pressure common rail test bench, the electric appliances being used are not allowed to approach the combustibles.

A series of comparative tests were conducted on the electronically controlled fuel injectors and high pressure common rail chambers in a high pressure common rail fuel injection system. The Bosch long tube method was used to test the fuel injection characteristics of the common rail system. The test results show that the fuel injection law has nothing to do with the volume under the premise of less fluctuation in the pressure in the orbital chamber, and the size of the inlet (outflow) hole in the control chamber has great influence on the injection law.

During the start-up process of high-pressure common-rail diesel engine, the characteristics of common rail pressure build-up, speed increase process and dynamic smoke are analyzed. Taking the exhaust smoke as the optimization goal, a step-by-step inspection and orthogonal test are proposed. Methods Calibration and optimization of injection parameters in the start-up process. The test was conducted on a 6-cylinder 6HK1 high pressure common-rail diesel engine.