DE102009027098A1 - Pressure medium supply device of a hydraulically actuated switching element - Google Patents

Abstract

It is a pressure medium supply means of a hydraulically actuated switching element (K1, K2) proposed comprising at least one with a pump (4) and with a line (3) for pre-filling of the switching element fluidly connected to the pressure medium supply channel (1, 2), characterized in that an additional non-return valve (9) or a non-return aperture is integrated in the line (3) for prefilling the switching element (K1, K2) so that it can be closed in the idling direction of the pressure medium supply channel (1, 2).

Description

The The invention relates to a printing medium feeding device of a hydraulically actuated switching element according to the Preamble of claim 1.

at hydraulically operated switching elements creates the problem that even when briefly switched off internal combustion engine, the Kupplungszuführkanäle run empty, which results disadvantageously in that at Reboot the vehicle, these channels only refilled Need to become. This means that through the extra required filling time of the coupling feed channels the spontaneity is negatively influenced. Furthermore must be that contained in the clutch feed ducts Air will be displaced from the channels, resulting in on the Kupplungsbefüllzeiten and thus also on the shift quality has a negative effect.

From the DE 102 305 01 A1 a clutch system is known, comprising a clutch device having at least one clutch assembly with an output shaft of a drive unit associated input side and a transmission input shaft associated output side and by means of at least one integrated in the clutch device, in the field co-rotating hydraulic slave cylinder is actuated.

The known coupling system comprises a stationary arranged Control valve arrangement, on the one hand to a hydraulic pressure medium source and on the other hand via a rotary feedthrough assembly is connected or connectable to the hydraulic slave cylinder wherein a pressure medium reservoir is provided, which at least with a Nutz-Druckmediumaufnahmebereich above one through the Rotary feedthrough arrangement defined height range arranged is and from the one comprising the rotary feedthrough assembly, the control valve assembly with the hydraulic slave cylinder connecting hydraulic system section pressure medium fed is such that the pressure medium at least one leakage point on the outflow side is pending, to an outflow of pressure medium counteract the hydraulic system section and / or that pressure medium over at least one inflow point flows into the hydraulic system section, an outflow of pressure medium from the hydraulic system section compensate.

By this construction, leakage of hydraulic fluid from the hydraulic system is to be reduced; In particular, an idling of the Kupplungszuführkanäle is to be prevented when the engine is switched off for a short time. In a disadvantageous way is from the DE 102 305 01 A1 known construction relatively complicated and associated with high manufacturing, installation and maintenance costs.

Of the The present invention is based on the object, a pressure medium - feeding device indicate a hydraulically actuated switching element at the emptying of the pressure medium supply channels for a short time shut down internal combustion engine to simple and inexpensive Way is avoided.

These The object is solved by the features of claim 1. Further embodiments and advantages of the invention are apparent from the dependent claims.

Therefore is a pressure medium supply means of a hydraulic actuated switching element proposed, comprising at least one with a pump and with a line for pre-filling the switching element fluidly connected pressure medium supply channel, at the in the line for pre-filling of the switching element integrated an additional check valve or a check valve is so that these in the idle direction of the pressure medium supply channel is closable.

Thereby, that the check valve or the check valve integrated into the line for pre-filling of the switching element is, the pressure medium supply channel by appropriate Operation of the clutch valve emptied in a simple manner and be vented.

For the case of a double clutch, includes the pressure medium feeding device a pressure medium supply channel for each clutch and a common line for pre-filling both switching elements, wherein according to the invention in the conduit for pre-filling the switching elements an additional check valve is arranged so that it closes the line in the idle direction, thereby preventing the feed channels can run empty.

By the concept of the invention is based on simple and cost-effective way avoided at short term shut off internal combustion engine, the pressure medium supply channels of switching elements can run empty, reducing the shift quality the initial circuit is significantly improved; the one presented here Pressure medium feeder can, for example, in vehicles be provided with a start-stop function.

The The invention will be described below with reference to the appended FIG. which is an illustration of a possible embodiment a pressure medium supply device of a hydraulically actuated Double clutch is explained in more detail by way of example.

Referring to the attached figure, the pressure medium supply means of a hydraulically actuated double clutch comprises two pressure medium supply passages 1 . 2 , which are each associated with a clutch K1, K2 of the dual clutch and in each case a clutch valve 6 . 7 exhibit. The worthier is a common management 3 for pre-filling both clutches K1, K2 provided on the one hand with one of the pump 4 downstream pressure relief valve 5 and on the other hand with both pressure medium supply channels 1 . 2 fluidly connected. The print media supply channels 1 . 2 are over another line 8th with the pump 4 connected. In the attached figure is a valve for adjusting the Vorbefülldrucks with 10 and the pressure regulator with 11 designated.

According to the invention is in the line 3 for pre-filling of the switching elements K1, K2 an additional check valve 9 or a check aperture arranged such that it is the conduit 3 closes in the idle direction; This prevents the pressure medium supply channels 1 . 2 run fast empty. Without the inven tion arranged according check valve 9 would the print media supply channels 1 . 2 The couplings K1, K2 idle faster with the engine off.

1

Pressure medium supply channel

2

Pressure medium supply channel

3

management for pre-filling

4

pump

5

Pressure relief valve

6

clutch valve

7

clutch valve

8th

management

9

Check valve, check panel

10

Valve for setting the pre-filling pressure

11

pressure regulator

K1

switching element

K2

switching element

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 10230501 A1 [0003, 0005]

Claims (3)

Pressure medium supply device of a hydraulically actuated switching element (K1, K2), comprising at least one with a pump ( 4 ) and with a line ( 3 ) for prefilling the switching element fluidly connected pressure medium supply channel ( 1 . 2 ), characterized in that in the line ( 3 ) for prefilling the switching element (K1, K2) an additional check valve ( 9 ) or a check aperture is integrated, so that these in the idle direction of the pressure medium supply channel ( 1 . 2 ) is closable. Pressure medium supply device of a hydraulically actuable switching element (K1, K2), according to claim 1, characterized in that in the case of a double clutch, wherein the pressure medium supply means a pressure medium supply channel ( 1 . 2 ) for each coupling (K1, K2) and a common line ( 3 ) for pre-filling both switching elements (K1, K2), in the line ( 3 ) for pre-filling the switching elements an additional check valve ( 9 ) is arranged such that it the line ( 3 ) closes in the idle direction, thereby preventing that the feed channels can idle. Pressure medium feeder of a hydraulic operable switching element (K1, K2), according to claim 1 or 2, characterized in that it is in a vehicle with a start-stop function can be used.