Piezoelectric injector for diesel engine

Piezoelectric injector for diesel engine

  • CN 102,678,414 A
  • Filed: 05/02/2012
  • Published: 09/19/2012
  • Est. Priority Date: 05/02/2012
  • Status: Active Application
First Claim
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1. piezoelectric fuel injector that is applied to diesel engine, it is characterized in that:

  • it comprises injector body, the front end of injector body is equipped with needle-valve;

    The front end of needle-valve is provided with oil nozzle, and the sidepiece of injector body is provided with oil connection and back leakage connection, and the injector body rear end is provided with the lamination type piezoelectric actuator;

    Be provided with the work pull bar in the lamination type piezoelectric actuator;

    The lower end of work pull bar connects with ball valve through the ball valve depression bar, is set with the ball valve spring on the ball valve depression bar, and the position of said injector body inside between ball valve and needle-valve is provided with the fuel oil control chamber;

    The fuel oil control chamber is provided with the oil inlet hole that is connected with oil connection, the oil outlet that is connected with back leakage connection;

    Be provided with control piston in the fuel oil control chamber, the controlling rod of control piston connects with needle-valve, the opening and closing of lamination type piezoelectric actuator control ball valve;

    Make fuel oil control chamber cavity pressure descend or rising, thereby to control the oil spout action of lifting or resetting and controlling oil nozzle of needle-valve.

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