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A parking brake actuator and a method for controlling the parking brake actuator

A technology for parking locks and actuators, applied in transmission control, components with teeth, belts/chains/gears, etc., which can solve problems such as excessive extraction time, high current demand, etc.

Active Publication Date: 2018-06-29
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Actuators with sufficient power capability for extreme conditions also have a high current demand or excessively long pull-out times when a large mechanical transmission ratio is selected

Method used

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  • A parking brake actuator and a method for controlling the parking brake actuator
  • A parking brake actuator and a method for controlling the parking brake actuator
  • A parking brake actuator and a method for controlling the parking brake actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 A parking lock actuator 1 is shown with, for example, an electromechanical drive unit 2 , which can rotate a lever shaft 3 . The drive unit 2 is operated by a controller not shown. The lever shaft 3 is moved while twisting the push rod 4 on which the locking element 5 is displaceably arranged. A stop 6 for the locking element 5 is arranged at the end of the plunger 4 . The locking element 5 is preloaded on the plunger 4 in the direction of the stop 6 via a spring accumulator 7 , here a helical compression spring. Furthermore, the parking lock actuator 1 has a pivotably mounted parking lock pawl 8 which can engage in a parking lock gear (not shown in greater detail). The locking element 5 has a conical design and corresponds to a correspondingly shaped surface of the parking lock pawl 8 and the guide plate 9 , where a lock is supported when the parking lock pawl 8 is pivoted. Element 5. In another embodiment, the supporting function of the guide plate can b...

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PUM

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Abstract

A parking brake actuator (1) for a motor vehicle transmission, comprises a parking pawl (8) which engages or disengages in a parking locking gear connected to the driven portion of the motor vehicle transmission, a locking element (5) which is displaceable relative to an actuating element (4) and spring-loaded by a spring accumulator (7), which prevents the parking pawl (8) from being pushed out of a tooth space of the parking lock gear in the locked state, the actuating element (4) being displaceable between a loading position (E) and a unloading position (A). According to the invention, in order to unload the parking brake actuator, the actuating element (4) can be displaced from the loading position (E) further into the loading direction (ER) into an end position (S) and then in the unloading direction (AR), the blocking element (5) is pushed out of the locked state using an additional force pulse. Thus, a larger unloading force can be achieved when unloading the parking brake.

Description

technical field [0001] The invention relates to a parking lock actuator for a motor vehicle transmission according to the features of the preamble of patent claim 1 and to a method for controlling it. Background technique [0002] Motor vehicle transmissions, in particular automatic transmissions and / or transmissions for electric vehicles, are often equipped with a parking lock, which mechanically locks the wheels of the motor vehicle. Parking lock mechanisms for such transmissions are known from the prior art. Usually, such a mechanism has a pretensioned spring via which the parking lock is activated, wherein the parking lock function is implemented via the locking cone-pawl system. To actuate the parking lock, mechanical devices are usually used in which an actuating element, ie, an actuating lever or an actuating shaft, interacts with the parking lock pawl and the parking lock gear. The locking elements of such parking lock mechanisms, usually configured as locking cone...

Claims

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Application Information

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IPC IPC(8): F16H63/38
CPCF16H63/38F16H63/3416F16H63/3425F16H63/3466F16H61/22
Inventor T.比恩鲍姆
Owner VOLKSWAGEN AG