New diesel injection nozzle flow measuring device

A new measuring device has been developed for diesel injection nozzle testi ng, allowing measuring of the steady flow through injection nozzle and the injection rate. It can be best applied for measuring the low and high injec tion rates of the pintle and single hole nozzle. In steady flow measuring t he fuel pressure at the inlet of the injection nozzle is 400 bar. The senso r of the measuring device measures the fuel charge, resulting from fuel rub bing in the fuel injection system, as well as from the temperature gradient in the sensor electrode. The electric charge is led to the charge amplifie r, where it is converted into electric current and amplified. The amplifier can be used also to measure the mean injection rate value. (C) 2000 Americ an Institute of Physics. [S0034-6748(00)01804-9].