초록 ▼

The invention relates to a high-pressure injection system for delivering and atomizing liquids by means of ultrasonic energy and, more in particular, to a fuel injection system for diesel engines. Said system is operated in conjunction with electronic control means. The injection system comprises a

The invention relates to a high-pressure injection system for delivering and atomizing liquids by means of ultrasonic energy and, more in particular, to a fuel injection system for diesel engines. Said system is operated in conjunction with electronic control means. The injection system comprises a housing defining a pumping chamber into which there extends the free end of an operating or pumping plunger adapted to be actuated by a vibrator. A slide valve is provided which extends through said pumping chamber and which is actuated by means of another vibrator. Together with a suction aperture and a discharge aperture, said slide valve defines a suction valve and a discharge valve, respectively, of the injection system. Under normal conditions, the vibrators associated with said plunger and said slide valve are operated in such a way that there exists a phase difference of 90°therebetween, with the result that during a suction stroke of said plunger said discharge valve is maintained closed whereas said suction valve is open, and that, during a delivery stroke of said plunger, said discharge valve is opened whereas said suction valve is maintained closed. In a gap formed around said discharge valve the fuel is atomized to a high degree during the delivery stroke of said plunger.

대표청구항 ▼

A high-pressure injection system for pumping liquids and atomizing them by means of ultrasonic energy, more in particular a fuel injection system for diesel engines, characterized in that said injection system is constructed as a structural unit of the positively controlled plunger pump type compris

A high-pressure injection system for pumping liquids and atomizing them by means of ultrasonic energy, more in particular a fuel injection system for diesel engines, characterized in that said injection system is constructed as a structural unit of the positively controlled plunger pump type comprising a pump housing which defines a pumping chamber completely filled with liquid, a suction valve and a discharge valve as well as a plunger extending into said pumping chamber, and in that the valve members of said suction valve and said discharge valve as well as said plunger are coupled to ultrasonic vibrators which are operable in a controlled manner for the purpose of causing liquid to be drawn in through said suction valve and to be ejected via said discharge valve.