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Title:
AIR-FUEL RATIO SETTING DEVICE
Document Type and Number:
Japanese Patent JPH0357864
Kind Code:
A
Abstract:

PURPOSE: To stably maintain always fixed air-fuel ratio with simplified structure by providing constitution in such a way as arranging a nozzle, having a slit in the upper and lower ends, in a diaphragm in a fuel side and changing an opening by the slit in accordance with a position of the nozzle so as to adjust a supply fuel gas amount.

CONSTITUTION: This air-fuel ratio setting device is provided with the first to third housings 3, 5, 7, and a needle valve 9, by which a variable orifice 8 is formed in a gas fuel passage 2, is supported to the housing 3. While space, partitioned by the housings 3, 5, is divided into two gas fuel chambers 11, 12 by the first diaphragm 10, and the chambers respectively communicate with the downstream and upstream sides of the variable orifice 8. The lower end of a hollow nozzle 15, formed with slits 14, 14' in the upper and lower ends, is fixed to the center of the diaphragm 10. While space between housings 5, 6 is divided into two air chambers 17, 18 by the second diaphragm 16 with the respective air chambers communicating with the downstream and upstream sides of a fixed orifice 19 in an air path 6.


Inventors:
YAMAGUCHI KAZUAKI
KURAZONO SOICHI
Application Number:
JP19267589A
Publication Date:
March 13, 1991
Filing Date:
July 27, 1989
Export Citation:
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Assignee:
AISIN SEIKI
International Classes:
F02G1/045; F02G1/043; F02M21/02; (IPC1-7): F02G1/045; F02M21/02