EP 1297263 B1 20040908 - HYDRAULIC ENERGY ACCUMULATOR WITH METAL BELLOWS
Title (en)
HYDRAULIC ENERGY ACCUMULATOR WITH METAL BELLOWS
Title (de)
HYDRAULIKENERGIESPEICHER MIT EINEM AUS METALL BESTEHENDEN FALTENBALG
Title (fr)
ACCUMULATEUR D'ENERGIE HYDRAULIQUE AVEC SOUFFLET EN METAL
Publication
Application
Priority
- DE 0102269 W 20010622
- DE 10030937 A 20000624
Abstract (en)
[origin: WO0201076A2] A hydraulic energy accumulator consisting of a housing (7) with a space (4) for inserting metal bellows (5), comprising a non-moveable end and a moveable end with a front wall arranged in a sealed manner on the bellows and separating a hydraulic pressure medium from a pressurized gas is already known per se. The advantage of using metal bellows is that they are gas-tight in so far as no leak arises over time. According to the invention, the bellows are embodied in such a way that the pressure of said bellows in the gas is reduced in comparison with the hydraulic medium as a result of the longitudinal elasticity of said bellows and a sensor system (6) is provided which indicates a longitudinal expansion of the bellows (5) when the hydraulic pressure medium flows through a leak in said bellows into the area containing the gas. The inventive hydraulic energy accumulator (2) and the sensor system (6) thereof are also capable of indicating when such a leak occurs in the bellows. The indication of a leak is also an indication that a motor vehicle braking system fitted therewith has become unsafe.
[origin: WO0201076A2] A hydraulic energy accumulator consisting of a housing with a space for inserting metal bellows, comprising a non-moveable end and a moveable end with a front wall arranged in a sealed manner on the bellows and separating a hydraulic pressure medium from a pressurized gas is already known per se. The advantage of using metal bellows is that they are gas-tight in so far as no leak arises over time. According to the invention, the bellows are embodied in such a way that the pressure of said bellows in the gas is reduced in comparison with the hydraulic medium as a result of the longitudinal elasticity of said bellows and a sensor system (6) is provided which indicates a longitudinal expansion of the bellows (5) when the hydraulic pressure medium flows through a leak in said bellows into the area containing the gas. The inventive hydraulic energy accumulator (2) and the sensor system (6) thereof are also capable of indicating when such a leak occurs in the bellows. The indication of a leak is also an indication that a motor vehicle braking system fitted therewith has become unsafe.
IPC 1-7
IPC 8 full level
F15B 1/033 (2006.01); F15B 1/10 (2006.01); F15B 1/22 (2006.01)
CPC (source: EP)
F15B 1/033 (2013.01); F15B 1/103 (2013.01); F15B 1/22 (2013.01); F15B 2201/205 (2013.01); F15B 2201/21 (2013.01); F15B 2201/3153 (2013.01); F15B 2201/411 (2013.01); F15B 2201/415 (2013.01); F15B 2201/515 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0201076 A2 20020103; WO 0201076 A3 20020718; DE 10030937 A1 20020103; DE 50103556 D1 20041014; EP 1297263 A2 20030402; EP 1297263 B1 20040908
DOCDB simple family (application)
DE 0102269 W 20010622; DE 10030937 A 20000624; DE 50103556 T 20010622; EP 01984061 A 20010622