Transmission unit with hydraulic system

A technology of hydraulic system and transmission, which is applied in the direction of transmission, components with teeth, transmission control, etc., to achieve the effect of reducing hydraulic power consumption

Active Publication Date: 2018-09-25
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the cooling system of the gear set of the gear transmission designed as a dual-clutch transmission can only be supplied by means of an additional pump which has to be driven by an associated electric motor, so that in the area of ​​the gear set cooling circuit Medium transient undersupply states cannot be compensated with the desired spontaneity by additional pumps

Method used

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  • Transmission unit with hydraulic system
  • Transmission unit with hydraulic system
  • Transmission unit with hydraulic system

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Embodiment Construction

[0049] figure 1 Shows a hydraulic diagram of the transmission device 2 or the hydraulic system 1 of the transmission, or the hydraulic actuation system, currently embodied as a dual clutch transmission, in which nine transmission ratios for forward travel and one transmission ratio for reverse travel can be engaged . These transmission ratios can be switched on and off via five shifting elements 8 - 12 which can be adjusted by hydraulically actuatable piston-cylinder arrangements 3 - 7 . The switching element is presently designed as a switching lever. The actuating pressure p_B can be applied in the area of ​​the piston-cylinder arrangement 3-7 or in the area of ​​the piston chamber 3A, 3B or 4A, 4B or 5A, 5B or 6A, 6B or 7A, 7B via the valve device 16, which valve The device 16 now comprises three pilot-controlled switching valves 13 - 15 coupled to one another via lines. The switching valves 13 - 15 each have a plurality of switching positions for forming the transmissio...

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Abstract

A transmission includes a hydraulic system connected to a hydraulic pump and to an additional hydraulic pump. A secondary pressure circuit is connectable to a primary pressure circuit with a system pressure valve. A pressure side of the hydraulic pump is coupled directly with the primary pressure circuit and connectable to the secondary pressure circuit with the system pressure valve. A pressure side of the additional hydraulic pump is coupled directly with the secondary pressure circuit. The pressure side of the hydraulic pump proximate the secondary pressure circuit is connectable to a gear set, to a dual-clutch system and to a suction area of the hydraulic pump and the additional hydraulic pump by a valve device. The pressure side of the additional hydraulic pump is in connection with the gear set and is connectable with the dual-clutch system by the valve device.

Description

technical field [0001] The invention relates to a transmission arrangement with a hydraulic system. Background technique [0002] A hydraulic distribution system for a transmission is known from DE 10 2011 077 552 A1, by means of which a supply of hydraulic medium to components of a vehicle transmission can be carried out. The hydraulic arrangement comprises at least one main pump device driven on the drive side for supplying the primary hydraulic circuit with primary pressure, and the hydraulic arrangement is additionally formed with at least one auxiliary pump which can be driven on the output side, the additional pump Used to supply secondary pressure to the secondary hydraulic circuit. The additional pump device is connected directly to the primary hydraulic circuit or directly to the secondary hydraulic circuit, wherein the coupling device is provided for coupling the additional pump device to the output part of the transmission, or the switching device is provided for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/688F16H61/00
CPCF16H57/0435F16H57/0446F16H61/0025F16H61/2807F16H61/688F16H2061/0037F16H3/006F16H57/0441F16H61/0206
Inventor R·诺瓦克T·普夫勒格
Owner ZF FRIEDRICHSHAFEN AG
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