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Title:
ACCELERATOR FOR MEMBRANE TYPE CARBURETOR
Document Type and Number:
Japanese Patent JP2005299488
Kind Code:
A
Abstract:

To eliminate malfunction such as instability of engine operation and increase of exhaust harmful material due to discharge of residual air inside a pump chamber, discharge of generated fuel vapor and due to pump operation, in regard to an accelerator formed with an accelerating fuel passage, which sucks and discharges fuel to the pump chamber of an accelerating pump, connected to a main fuel passage.

The pump chamber 26 of the accelerating pump 28 mechanically interlocked with a throttle valve 5 is connected to a constant fuel chamber 8, which holds fuel to be sent to an intake passage 2 at a constant pressure, by an accelerating fuel passage 28. Residual air inside the pump chamber 26 and fuel vapor generated inside the pump chamber 26 are discharged to the constant fuel chamber 8, and the fuel extruded from the pump chamber 2 by the pumping work of the residual air and the fuel vapor enters the constant fuel chamber 8 to prevent fluctuation of fuel flow flowing in a main fuel passage 10. When accelerating, fuel of the pump chamber 26 is fed into the constant fuel chamber 8 to raise pressure inside the constant fuel chamber 8, and fuel to be sent to the intake passage 2 is increased to obtain the accelerating fuel.


Inventors:
Iwasa, Koji
Toda, Mamoru
Application Number:
JP2004000116346
Publication Date:
October 27, 2005
Filing Date:
April 12, 2004
Export Citation:
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Assignee:
ZAMA JAPAN CO LTD
International Classes:
F02M17/04; F02M7/08; (IPC1-7): F02M17/04; F02M7/08
Attorney, Agent or Firm:
橋本 克彦
橋本 京子