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Transmission device with a hydraulic system including a pump device

A technology of hydraulic system and transmission, applied in the field of transmission device, can solve the problems of supply of main pressure circuit and secondary pressure circuit of transmission, etc.

Active Publication Date: 2015-05-20
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, when the drive unit is stationary, neither the secondary pressure circuit nor the primary pressure circuit of the transmission can be supplied with hydraulic oil via the two transmission oil pumps

Method used

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  • Transmission device with a hydraulic system including a pump device
  • Transmission device with a hydraulic system including a pump device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] figure 1 A partial view of the hydraulic system 1 of the transmission device 2 or dual clutch transmission is shown in . The hydraulic system 1 comprises a pump arrangement 3 with two pump units 4 , 5 , wherein the first pump unit 4 is designed as an adjustable vane pump and the second pump unit 5 is designed as a metering pump.

[0037] The first pump unit 4 now forms a transmission main pump, which is coupled in a known manner to a transmission input shaft (not shown in the figures) and can therefore be driven by a drive, preferably Internal combustion engine drive. In contrast to this, the second pump unit 5 is coupled to the transmission output shaft, which in turn can be connected in a known manner to the output of the vehicle drivetrain on which the transmission device 2 is installed and can be driven at a speed equal to the output. speed drive. The pressure side 6 of the first pump unit 4 is connected to a main pressure circuit 7 in which there is a system pre...

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PUM

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Abstract

A transmission device (2) with a hydraulic system (1)including a pump device (3) is described. A primary pressure circuit (7) and at least one additional pressure circuit (10) are able to be supplied with hydraulic fluid by the pump device (3). The pump device (3) is coupled with a transmission input shaft and is drivable by this. In accordance with the invention, a first pump unit (4) of the pump device (3) is connected to the transmission input shaft and is drivable by this. A second pump unit (5) of the pump device (3) is connected to a transmission output shaft and is drivable by this. A pressure side (6) of the first pump unit (4) is connected to the primary pressure circuit (7), and is connectable to the additional pressure circuit (10), while a pressure side (14) of the second pump unit (5) is connected to the additional pressure circuit (10), and is able to be coupled with the primary pressure circuit (7).

Description

technical field [0001] The invention relates to a transmission arrangement comprising a hydraulic system with a pump arrangement according to the type defined in detail in the preamble of claim 1 . Background technique [0002] Transmission devices known from practice, such as automatic transmission devices, usually have a hydraulic system, which is supplied with hydraulic oil by means of a pump device. Furthermore, known pump arrangements include so-called metered pumps, whose oil delivery capacity varies as a function of the drive speed, or adjustable pump arrangements, whose oil delivery quantity can be adjusted. In principle, a wide variety of requirements can be met by means of a pump device which is usually located in the region of the transmission input shaft and is driven by the drive of the vehicle powertrain of a vehicle with an automatic transmission. [0003] Many hydraulic actuators of such hydraulic systems, such as clutches or selector levers, are capacitive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00F16H61/02
CPCF16H61/0031F16H2061/0037F16H2061/0046Y10T74/20024F16H61/02F16H2200/00F16H2306/00
Inventor R·诺瓦克
Owner ZF FRIEDRICHSHAFEN AG
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