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Hydraulic actuation device for actuating positioning members in motor vehicle transmission

A technology for hydraulic transmissions, motor vehicles, applied in transmission control, fluid pressure actuation devices, elements with teeth, etc., can solve problems such as energy loss, spool valve leakage, occupation, etc., and achieve a higher level of fluid cleanliness. High, false activation prevention, compact size effect

Active Publication Date: 2013-01-09
FTE AUTOMOTIVE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spool valve used has a slight leakage which, after a corresponding duty cycle, leads to a complete unloading of the storage unit, with the result that the first actuation delays the time to load the storage unit
In addition, in the case of gearless drives, for example, on the highway, the storage unit needs to be reloaded at regular intervals, which also results in a loss of energy
Finally, the valve block with solenoid valves occupies a large amount of installation space in the transmission and represents the largest cost factor for the described transmission

Method used

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  • Hydraulic actuation device for actuating positioning members in motor vehicle transmission
  • Hydraulic actuation device for actuating positioning members in motor vehicle transmission
  • Hydraulic actuation device for actuating positioning members in motor vehicle transmission

Examples

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no. 1 example ；

[0024] figure 2 shown as figure 1 Enlarged view of detail part II in , illustrating how the locking element of the stop device cooperates with the locking section on the piston of the piston-cylinder assembly. Radial groove formation of different groove depths;

[0025] image 3 Shown is a circuit diagram of a variant of the hydraulic transmission according to the first embodiment, in which the radial grooves on the outer circumference of the pistons have the same depth, and sensor means for detecting the position of the pistons are additionally provided;

[0026] Figure 4 Shown is a circuit diagram of a hydraulic transmission for driving a plurality of positioning elements in a motor vehicle transmission, with a corresponding number of piston-cylinder assemblies hydraulically connected in parallel to a single pump, as according to Second embodiment of the present invention;

[0027] Figure 5 Shown is a circuit diagram of a hydraulic transmission with only one piston-...

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Abstract

An actuating device for hydraulically actuating at least one setting element comprising a pump, which has an electric pump drive, with reversible pumping direction, at least one double-acting piston-cylinder arrangement, which is connected therewith and the piston of which is operatively connected with the setting element, and a hydraulic fluid reservoir from which the hydraulic fluid can be pumped to the piston-cylinder arrangement in order to hydraulically load the piston thereof for a setting element movement depending on pumping direction on one (effective surface 22) or other (effective surface 24) side. In this connection, the piston-cylinder arrangement is functionally associated with a detent device with a blocking element, which is spring-biased into a blocking position preventing setting element movement and is movable by an electrically activatable actuator from the blocking position into a release position permitting setting element movement. In addition, a pump driver and an execution mechanism are in connection with a control unit which coordinates electric power active action of the components.

Description

technical field [0001] According to the preamble of claim 1, the invention relates to a hydraulic transmission. The invention relates in particular to a hydraulic transmission for driving one or more positioning elements, for example a transmission shifting element in a motor vehicle transmission, the transmission of which is widely used in modern motor vehicles. Background technique [0002] The mentioned transmission shifting elements, usually shift forks and transmission sleeves with or without synchronizer, are used in automatic shifting gearboxes (ASG), dual-clutch or multi-clutch transmissions (TCT) and separable Power splitter transmission and transaxle. The actuation of these components is either electromechanical or hydraulic, where the advantage of hydraulic actuation over the physical arrangement in the transmission is due to the high power density of the actuators. Thus, the shift fork or the shifter sleeve can be driven directly and avoid additional frictional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/30F15B15/26F15B21/08
CPCF15B11/122F15B2211/27F16H63/3483F16H61/30F15B2211/20515F15B2211/7054F15B7/006F15B2211/7128F15B2211/72F15B2211/7053F16H63/34F15B2211/6651F15B2211/20561F15B2211/665F15B2211/6336F15B2211/785F16H63/48F15B2211/3058F16H2061/004
Inventor W·赫伯那S·伦克
Owner FTE AUTOMOTIVE GMBH & CO KG
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