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Title:
FUEL INJECTION DEVICE
Document Type and Number:
Japanese Patent JPH03107568
Kind Code:
A
Abstract:

PURPOSE: To unnecessitate an existing fuel pump and at the same time enable a large quantity of fuel injection in a short time by providing a fuel injection device body addedly with a piezoelectric system micro fuel pump and measuring the required fuel quantity by the action of this micro fuel pump except at the time of injection.

CONSTITUTION: An injection device body 1 with a built-in valve body 2 connected directly to a high-speed solenoid 3 is internally provided with a fuel inflow port 8, a fuel passage 9 communicated with the inflow port 8, an inflow side check valve 10 for performing the switching between the passage 9 and a pump chamber 11, a delivery side check valve 12 for performing the switching between the pump chamber 11 and a mixing chamber 13, and an air hole 14 opened into the mixing chamber 13 as well as communicated with an air pump. A piezoelectric stack (piezoelectric element) 6 is connected to such a device body 1 through a diaphragm 7, thus forming a piezoelectric system micro fuel pump 15. A controller 20 controls in such a way that the required fuel quantity is measuredly supplied to the mixing chamber 13 by the driven frequency of the fuel pump 15 except at the time of injection, and at the time of injection, the high-speed solenoid 3 is driven to control a nozzle 4 by valve opening.


Inventors:
YOSHIDA YUTAKA
SAKAGAMI EIJI
Application Number:
JP24503889A
Publication Date:
May 07, 1991
Filing Date:
September 22, 1989
Export Citation:
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Assignee:
AISIN SEIKI
International Classes:
F02M67/02; F02M67/12; F02M51/06; F02M69/08; F02M69/10; F02B75/02; (IPC1-7): F02M51/06; F02M67/02; F02M67/12
Attorney, Agent or Firm:
Takao Karaki (1 person outside)



 
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