Title:
VARIOUS CONTROL VALVE DEVICE
Document Type and Number:
Japanese Patent JPS6395510
Kind Code:
A
Abstract:
PURPOSE:To keep the proper compression value for control springs related to the main body of a valve device by utilizing the function of a pilot valve to control the pressure of a bellows diaphragm room, etc. CONSTITUTION:When the primary side pressure P1 increases, the secondary side pressure P3 also increases at the part around a main body 13. Then a pilot valve needle 43 is moved up and he pressure of a bellows diaphragm room 23 is breeded to a secondary side pressure pipeline 48. Thus a control spring 28 is expanded and corrected in the direction where the pressure P3 is reduced, i.e., in the direction where the differential pressure (P3 - fuel pressure P2) is reduced. While the pressure P3 is lowered when the pressure P1 is lowered and the matter 43 is pushed down. Then the pressure P1 in a primary side pressure pipeline 47 is led into the room 23 and the spring 28 is compressed to be corrected in the direction where the pressure P3 rises up, i.e., in the direction where the differential pressure (P3 - P2) is increased. Thus, it is possible to keep the compression value of the spring 28 so as to ensure the constant differential pressure (P3 - P2) at all times even in case the pressure P2 rises or falls.
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Inventors:
TAMURA HIDEJI
Application Number:
JP24152986A
Publication Date:
April 26, 1988
Filing Date:
October 13, 1986
Export Citation:
Assignee:
TAMURA HIDEJI
International Classes:
G05D16/00; F16K17/06; G05D16/16; (IPC1-7): F16K17/06; G05D16/16
Domestic Patent References:
| JP46032219A |