Title:
CONTROL VALVE DEVICE FOR VARIABLE DELIVERY PUMP
Document Type and Number:
Japanese Patent JPS61132787
Kind Code:
A
Abstract:
In the pressure regulation of a variable displacement pump very high pressures can build up in the pump delivery line if at the consumer no discharge of the fluid takes place, for example the piston of a servo motor moves against a stop. A pressure regulation of the pump is then only possible via the inner losses of the pump. Consequently, although the pressure can be built up rapidly it can only be reduced very slowly. According to the invention the pressure reduction is via a bypass which is controlled by the control valve of the variable displacement pump and which connects the pressure side of the pump to a tank discharge when the control valve is driven in the sense of a reduction of the pump pressure. According to the invention a very rapid pressure reduction is obtained so that the variable displacement pump can again be pressure controlled.
Inventors:
RAINAA BARUTOROMOISU
Application Number:
JP21928485A
Publication Date:
June 20, 1986
Filing Date:
October 03, 1985
Export Citation:
Assignee:
REXROTH MANNESMANN GMBH
International Classes:
F15B9/09; F04B1/26; F04B49/00; F04B49/08; F16K31/06; (IPC1-7): F04B1/26; F04B49/08; F15B9/09; F16K31/06
Attorney, Agent or Firm:
Takehiko Suzue