Title:
A pulsation damper and a high-pressure fuel pump
Document Type and Number:
Japanese Patent JP5979092
Kind Code:
B2
Abstract:
A pulsation damper (20) includes a first diaphragm (21) and a second diaphragm (22) having a first pressure-receiving film portion (21a) and a second pressure-receiving film portion (22a) and defining a gas chamber (23) between the first pressure-receiving film portion (21a) and the second pressure-receiving film portion (22a) and an annular attachment member (24) configured to support the first diaphragm (21) and the second diaphragm (22). Pressure receiving areas (A1, A2) of the first pressure-receiving film portion (21a) and the second pressure-receiving film portion (22a) are different from each other. The annular attachment member (24) includes a large-diameter annular support portion (24a) formed so as to surround the first pressure-receiving film portion (21a) and to support the first diaphragm (21); a small-diameter annular support portion (24b) formed so as to surround the second pressure-receiving film portion (22a) and to support the second diaphragm (22); and an annular coupling portion (24c) configured to couple the large-diameter annular support portion (24a) with the small-diameter annular support portion (24b) so as to close the gas chamber (23).
Inventors:
Takeuchi Yabuuchi
Application Number:
JP2013152224A
Publication Date:
August 24, 2016
Filing Date:
July 23, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02M59/44; F02M55/00
Domestic Patent References:
| JP10299609A | ||||
| JP2007309118A |
Foreign References:
| WO2010106645A1 |
Attorney, Agent or Firm:
Gunichiro Ariga
Eigarou Ariga
Eigarou Ariga