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Title:
ACCELERATION PUMP DEVICE FOR CARBURETOR
Document Type and Number:
Japanese Patent JPH06147014
Kind Code:
A
Abstract:

PURPOSE: To provide an acceleration pump device, for a carburetor, capable of satisfying a requirement characteristic for fuel correcting quantity at the time of the quick-opening of a throttle, and of obtaining a favorable engine characteristic over a whole load region.

CONSTITUTION: In an acceleration pump device in which fuel is jetted from an acceleration pump nozzle 12, two acceleration pumps PA and PB are connected in parallel to an acceleration pump nozzle 12, and also the fuel injection timing of an acceleration pump PA and that of an acceleration pump PB are made mutually different respectively. The characteristic of fuel correction quantity by an acceleration pump device is made a broken line state to throttle opening to near a required secondary curve characteristic. Consequently, fuel correcting quantity at the time of the quick-opening of a throttle can be limited in an allowable value in a whole throttle opening region, obtaining a favorable engine characteristic in a whole load region.


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Inventors:
Nozawa, Hisayuki
Application Number:
JP1992000299802
Publication Date:
May 27, 1994
Filing Date:
November 10, 1992
Export Citation:
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Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F02M7/08; (IPC1-7): F02M7/08
Attorney, Agent or Firm:
山下 亮一