Improvement Of Fuel Measurement System Of Test Bench Of Fuel Injection Pump

Fuel injection pump is a vital part in diesel engine. And the quantity of fuel is distributed to each cylinder according to the rotation speed of diesel engine, which affects the whole function of diesel engine. Fuel injection pump is adjusted in test bench of fuel injection pump. Measuring cylinder is used on test bench of fuel injection pump all over the world, so manufacture error, sight error etc make the accuracy degree low.The thesis analyses the problem of fuel measurement system of the test bench of fuel injection pump, and the experiments and designs are done according to the problem, and the type and situation of the test bench of fuel injection pump all over the world is refered to.The contents of the thesis are as follows:(1) All the contents:â‘ Magnetism sense fuel injector is designed.â‘¡Needle valve lift signal,rotation speed signal and pressure signal are collected and processed.â‘¢Circuit is designed.â‘£Programme is programmed.(2) Contents studied: The itemâ‘ is completed.(3) Contents in the phase: The itemâ‘¡toâ‘£will be done.The technical line of the thesis is as follows:Formula of quantity of fuel injection is got by studying relation of quantity of fuel injection and needle valve lift, time of fuel injection, rotation speed and pressure, and quantity of fuel injection is displayed.(1) Wave shape is analysed by EXCEL, and mathematic module is built.(2) Area of wave shape is calcuted, and relation of voltage, time of fuel injection and area is got.(3) Formula of quantity of fuel injection is got according to relation of quantity of fuel injection and area.The experiments as follows are done:(1) Space of magnetism sense organ and needle valve is measured.(2) Relation of quantity of fuel injection and needle vavle lift,rotation speed and pressure is got.