Abstract:
A self-contained pressure compensation system and a control method thereof are provided, wherein the self-contained pressure compensation system comprises a oil supply device, a pressure compensation device, a power unit associated with the pressure compensation device, and a switch control device, the pressure compensation device supplies oil to the power unit and detects a change in a chamber pressure of itself in real time, the switch control device triggers the oil supply device to supply oil to the pressure compensation device if the chamber pressure is less than a predetermined first threshold and triggers the oil supply device to stop supplying oil to the pressure compensation device if the chamber pressure is greater than a predetermined second threshold. The invention can detect a chamber pressure of the pressure compensation device in real-time and can achieve automatic oil refilling, and can provide pressure compensation for the power unit effectively.
Abstract:
The invention concerns a reflector (100) for reflecting electromagnetic waves, which waves are emitted into a conducting structure (101) from at least one antenna (4) situated at a distance (d') from the reflector (100). The distance (d') is calculated based on measured emitted and reflected waves to and from the reflector (100), respectively. The inventive reflector (100) comprises a reflector disc (102), an elongated body (103,103') having a first longitudinal end (105) and a second longitudinal end (106), the first longitudinal end (105) being fastened to the reflector disc (102) and the second longitudinal end (106) being fastenable to an accumulator piston (107, 107'). Said elongated body (103, 103') further comprises at least two telescopically interconnected reflector tubes (103, 103') rendering reversible adjustment of the elongated body's (103, 103') longitudinal length around a predetermined equilibrium length possible. The invention also concerns a piston accumulator (2,116) applying the reflector, and a method for measuring said distance (d').
Abstract:
Method and device for determining the position of a piston in a cylinder comprising use of both ultrasound transducer and magnetometer for transmitting and receiving signals that are interpreted in a signal processor for determining the position of the piston.
Abstract:
The invention relates to a piston accumulator (1) and a method for determining a position of a piston (5) that can be moved inside a housing (3) of the piston accumulator (1). One or more inductive sensors (15) are arranged on an exterior surface (21) of the housing (3) and configured to detect a movement of the piston (5) inside the housing (3) caused by electromagnetic induction. In this way, a determination of the current position of the piston (5), which is technically simple to realise and contact-free, can be implemented and used, for example, to monitor a charge state of the piston pressure accumulator (1).
Abstract:
A gas spring accumulator includes a housing 2, 3 provided with an inlet 20, 21 and a flexible diaphragm 4 dividing the interior of the housing into a working chamber 7 which is exposed to system pressure via the inlet 20, 21 and a gas chamber 6. A port 23 is provided for attachment of an external pressure vessel in the form of a length of pressure hose 24, and an indicator rod 31 visible through a sight capsule 33 shows when the gas charge balances the system pressure. Another embodiment is described which includes a valve arrangement to permit automatic regulation of gas flow into and out of the gas chamber 6 and enable the accumulator to operate at its maximum efficiency without the requirement for external gas charging of the system.
Abstract:
Vorrichtung zur Bestimmung der Position eines beweglichen Trennelements (10), das innerhalb eines Speichers (12) als Abtrennung zwischen einem Gasraum (14) und einem Fluidraum (16) angeordnet ist, wobei die Bestimmungsvorrichtung zumindest einen Drucksensor (26) zur Erfassung von Druckdaten, zumindest einen Ultraschallsensor (28) zur Erfassung von Ultraschalldaten und zumindest eine Rechnereinheit (30) zum Auswerten der Daten umfasst, mit der die Position des Trennelements bestimmbar ist.
Abstract:
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.