Title:
QUANTITY REGULATING VALVE FOR REGULATING QUANTITY OF LIQUID OR GAS
Document Type and Number:
Japanese Patent JPS6267276
Kind Code:
A
Abstract:
A metering valve includes a piezoelectric cylinder connected via a spring biased needle to a valving element for closing a metering opening. To compensate for slow changes in the length of the piezoelectric control member, there is provided a damping piston connected axially to the piezoelectric member and being movable in a well formed in the valve housing and defining with the end face of the piston a damping chamber. A tubular membrane surrounds a portion of the damping piston and is attached to the piezoelectric member and to an inner wall of the housing around the opening of the well to define with the piston an annular equalizing space. The damping and equalizing spaces are filled with liquid and communicate with one another via a narrow throttling gap formed between facing walls of the well and of the piston.
Inventors:
DEIITORITSUHI TORAHATE
Application Number:
JP21736086A
Publication Date:
March 26, 1987
Filing Date:
September 17, 1986
Export Citation:
Assignee:
BOSCH GMBH ROBERT
International Classes:
B05B1/30; F02M21/02; F02M51/06; F02M61/00; F02M61/08; F02M61/20; F02M63/00; (IPC1-7): B05B1/30; F02M51/06; F02M61/00; F02M61/08
Attorney, Agent or Firm:
Toshio Yano