Title:
自動車用可変機械式潤滑油ポンプ
Document Type and Number:
Japanese Patent JP6909287
Kind Code:
B2
Abstract:
A mechanical lubricant pump includes a control ring which shifts between a maximum and a minimum eccentricity position, the control ring having a circumference with anti-spring and pro-spring hydraulic surfaces, a pump rotor having slidable vanes which rotate in the control ring, a preload spring which pushes the control ring into the maximum eccentricity position, a hydraulic pilot chamber which pushes the control ring into the minimum eccentricity position, a hydraulic pressure control circuit which controls a gallery pressure by regulating a pilot chamber pressure, and a hydraulic outlet chamber which surrounds a part of the circumference. The hydraulic pilot chamber is charged with a pump outlet pressure or with the gallery pressure of an engine. The hydraulic outlet chamber is charged with the pump outlet pressure and is connected to the pump outlet for a pressurized lubricant. The anti-spring hydraulic surface is larger than the counter-acting pro-spring hydraulic surface.
Inventors:
Cuneo, Carmine
Application Number:
JP2019519692A
Publication Date:
July 28, 2021
Filing Date:
October 12, 2016
Export Citation:
Assignee:
Pierburg Pump Technology GmbH
International Classes:
F04C2/344; F04C15/00
Domestic Patent References:
| JP2016104967A |
Foreign References:
| US20080069704 | ||||
| WO2014187503A1 |
Attorney, Agent or Firm:
Patent Corporation Nagato & Partners