Device for measuring the injection jets of high-pressure injection valves

摘要

The invention relates to a device for measuring the injection jets of high-pressure injection valves. The receiving chamber surrounding the nozzle thereof is fitted with electrical sensors for jet measurement, which are constructed as dynamometers which can be subjected directly to the impulse of the injection jets. These can be electrically resistive, capacitive, but especially piezoelectric sensors. The receiving chamber or the surface sensitive to measurement is configured in a rotationally symmetrical, in particular spherical shape relative to the position of the centre of the nozzle. In order to obtain via the jet impulse not only a quantity signal of the individual jets but also a measurement of the jet position, two strip-shaped sensors in a V-arrangement are provided in the receiving chamber and sweep the circumference of the surface sensitive to measurement at high speed. The distance of the signals they deliver with respect to a circumference reference signal supplies the azimuthal position, whereas the elevation position of the injection jets can be obtained from the time interval between the two individual signals.