Method for detecting emergency unlocking of a park lock

An emergency unlocking and parking lock technology, applied in the direction of toothed elements, belts/chains/gears, mechanical equipment, etc., to achieve the effect of low current consumption and prevention of undesired separation

Active Publication Date: 2022-02-15
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the vehicle stops

Method used

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  • Method for detecting emergency unlocking of a park lock
  • Method for detecting emergency unlocking of a park lock
  • Method for detecting emergency unlocking of a park lock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] figure 1 A schematic diagram of the parking lock 1 is shown. The parking lock 1 is formed by a parking lock pawl 2 and a parking lock gear 3 , wherein the parking lock pawl 2 is fixed on a housing 4 . The parking lock pawl 2 is actuated by an actuator 5 comprising an electric motor 6 . The parking lock gear 3 is arranged on an intermediate shaft 7 , which is directly connected to the drive wheels, not further shown.

[0022] exist figure 2 An embodiment of a hydraulic device for carrying out the method according to the invention is shown in . The hydraulic system 8 includes a pump 9 which engages on one side of a coolant line 10 . The coolant line 10 leads a hydraulic fluid 11 , for example oil, to a first consumer 12 in the form of a heat exchanger. Hydraulic fluid 11 is brought to said first consumer 12 for cooling or lubricating purposes.

[0023] On the other side, the pump 9 is connected to the actuating line 13 . The actuating line 13 is configured to carr...

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PUM

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Abstract

The invention relates to a method for detecting emergency unlocking of a park lock, in which the park lock (1) is activated and deactivated by a hydraulic park lock operating means (16) in that a retaining magnet (21) immobilises or releases a piston (22) of a hydraulic cylinder (23) of the park lock operating means (16), a park lock pawl (2) engaging in or disengaging from a park lock wheel (3) as a result of a movement of a hydraulic fluid (11) triggered by a park lock actuator (9). In a method in which an activated or deactivated emergency unlocking of the park lock can be detected reliably, a current (I) of the electrical park lock actuator (9) is evaluated when the park lock actuator (9) attempts to open the park lock (1).

Description

technical field [0001] The invention relates to a method for emergency unlocking of a parking lock, wherein the parking lock is activated or deactivated by means of a hydraulic parking lock operator by holding a magnet in place or by releasing the parking Piston of the hydraulic cylinder of the lock actuator, in which the parking lock pawl is locked into or disengaged from the parking lock gear by movement of the hydraulic fluid triggered by the electric parking lock actuator . Background technique [0002] A parking lock with a lock pawl and a parking lock gear is known from DE 102 59 893 A1. A form fit is established between the drive unit and the transmission housing by locking the locking pawl into the tooth gap of the parking lock gear. Therefore, the vehicle is stopped. The powertrain and thus the vehicle are unlocked by disengaging the detent pawl from the backlash. [0003] The applicant's unpublished German patent application with application number 10 2018 1331...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/34F16H63/36
CPCF16H63/3425F16H63/3466F16H63/3483F16H63/36F16H63/3491F16H63/3458F16H2061/1212F16H61/12
Inventor 蒂莫·恩德斯拉夫·曼斯皮尔格
Owner SCHAEFFLER TECH AG & CO KG
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