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为提高发动机的油耗测试精度 ,对影响油耗测试精度的主要原因及其解决方法进行了分析研究和试验。试验表明 :柱塞式喷油泵的回油压力是影响测试精度的主要原因 ,用软件消除回油压力信号和用消波器消除回油压力波 ,是消除回油压力影响、提高油耗测试精度最简便可靠的方法。
In order to improve the fuel consumption test precision of the engine, the main reason that causes the fuel consumption test accuracy and its solution are analyzed and tested. The test shows that the return pressure of the plunger pump is the main factor that affects the test accuracy. Eliminating the return pressure signal and eliminating the return pressure wave with a wave eliminator by software eliminate the influence of the return oil pressure and improve the fuel consumption test accuracy Simple and reliable method.