MEASURING DEVICE FOR FUEL INJECTION QUANTITY AND FUEL INJECTION RATE

摘要

PURPOSE: To obviate the necessity of calculating the volume modulus of fuel and improve the working efficiency and measurement precision by partitioning a sealed container by a diaphragm, injecting fuel into the first chamber, and detecting the displacement quantity of the diaphragm in the second chamber. ;CONSTITUTION: When the liquid in a measured injection quantity ΔV is injected into the first sealed container 21 from an injection nozzle 24, the pressure in the container 21 increases, and a diaphragm 23 is pressed, and displaced by ΔL into the second sealed container 22, and this displacement is detected by a noncontact type gap sensor 25. The detection displacement signal is inputted into a measurement calculation device, and the fuel injection quantity ΔV and the fuel injection rate are calculated on the basis of the displacement quantity ΔL and the displacement time (t) of the diaphragm 23 which are obtained from the detection displacement signal. At this time, the fuel injection quantity ΔV is calculated on the basis of each capacity of the first and second chambers 21 and 22, effective area of the diaphragm 23, and the displacement quantity ΔL, and the fuel injection rate is calculated according to the above-described elements and the density of fuel, and can be obtained independently of the volume modulus as the function of fuel temperature, pressure, kind, etc.;COPYRIGHT: (C)1994,JPO&Japio