Parking Lock Decoupling Mechanism for Autonomous Vehicles
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Solution Overview
Problem
Existing parking brake devices for motor vehicles with automatic transmissions lack a simple and efficient mechanism to decouple the parking lock from the gear selector lever, making it difficult to disengage the parking lock without moving the gear selector lever out of the parking lock position, which is a limitation for autonomous parking systems.
Innovation Solution
A parking brake device with a movable coupling device and a decoupling mechanism that allows for the detachment of the coupling between the first and second mechanical transmission elements in the parking lock position, enabling independent actuation of the second mechanical transmission element and allowing the parking lock to be disengaged even when the gear selector lever is in the parking lock position, using a sliding element and a drive unit for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gear selector lever is used to engage and disengage the parking lock, then the parking lock can be controlled through the existing gear selection mechanism, but the parking lock cannot be disengaged independently when the gear selector lever remains in the parking lock position
Solution Approach 1:
The power transmission path is divided into two separate mechanical transmission elements (first and second mechanical transmission elements) that can be independently actuated. The first element connects the gear selector lever to the coupling device, while the second element connects the coupling device to the parking lock, allowing independent control of each transmission path
Solution Approach 2:
A coupling device is introduced as an intermediary component between the first and second mechanical transmission elements. This coupling device includes a movable coupling element that can selectively connect or disconnect the two transmission elements, enabling independent actuation of the parking lock while maintaining the existing gear selector lever functionality
2Ease of operation
If a fixed connection exists between the first and second mechanical transmission elements, then the structure is simple and reliable, but the second mechanical transmission element cannot be actuated independently of the first
Solution Approach 1:
The coupling device incorporates a movable coupling element that can dynamically change its position between connected and disconnected states. This movable element is actuated by a decoupling device that shifts the coupling element along its axis, transforming the fixed connection into a dynamically adjustable connection that allows independent actuation when needed
Data Source
AI summary
In one aspect, the present disclosure provides a parking brake device for a motor vehicle. The device may include a vehicle transmission including a parking lock and a gear selector lever coupled with the parking lock, where the gear selector lever is movable into a parking lock position for engaging the parking lock, and where the gear selector lever is movable out of the parking lock position for disengaging the parking lock. A first mechanical transmission element and a second mechanical transmission element may be arranged between the gear selector lever and the parking lock, where the first mechanical transmission element may be connected with the gear selector lever and configured for transmitting a moving force emanating from the gear selector lever to the second mechanical transmission element, and where the second mechanical transmission element may be connected with the parking lock.