Method study for RT-Flex HPCR low-speed diesel engine injecting law measuring

For researching the injecting law of low-speed HPCR diesel engine, a novel measuring method is invited. This method provide a certain reference to solve the problem that RT-Flex HPCR low-speed diesel engine fuel injection law can not be measured directly under the present conditions. Under different load working conditions on the RT-Flex60C low-speed diesel engine HPCR (high pressure common-rail) HIL(Hardware In the Loop)test platform, pressure curves at the outlet of high-pressure fuel pipe where connected with injector are measured, and a multi-hole injector model of RT-Flex60C diesel engine is built with AMESim. Inputted the pressure curves into the model with ASCII code files, characteristic curves such as needle lift, injector injecting rate, injecting rate and pressure of each hole on nozzle, fuel quantity injected and returned during 180 second are calculated. Experimental result indicated that the calculated needle lift curves are consistent with the curves measured on test platform, the injected and returned fuel quantity during 180 second are in line with the data measured on real engine.