Provided is a hydraulic supply device. The hydraulic supply device helps to avoid damage to a first accumulator and makes the device small-sized. The first accumulator (65) of the hydraulic supply device is provided with a cylinder body (65a), a piston (65b), a first force-applying unit (65c), a communicating hole (65g), a valve body (65h) and a second force-applying unit (65c). The piston (65b) can be slidably arranged in the interior of the cylinder body (65a) and enables the interior of the cylinder body (65a) to be segmented to a back-side chamber (65e) and a first pressure accumulation chamber (65d) of accumulated hydraulic pressure. The first force-applying unit applies force towards a piston (65b) of the side of the first pressure accumulation chamber. The communicating hole is formed in the piston (65b) so that the first pressure accumulation chamber (65d) is communicated with the back-side chamber (65e). The valve body is arranged in the interior of the cylinder body (65a) and is enabled to move between the closing position for closing the communicating hole (65c) and an opening position for opening the communicating hole (65g). The second force-applying unit (65c) is arranged in the interior of the cylinder body (65a) such that the valve body (65h) applies force at the closing position. When hydraulic pressure in the first pressure accumulation chamber (65d) reaches the stated upper limit, the valve body (65h) is allowed to move from the closing position to the opening position.
Hydraulic supply device
2015-04-29
Patent
Electronic Resource
English
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |