Gear Selection Unit with Releasable Coupling for Automatic Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gear selection units for automatic transmissions in vehicles lack efficient mechanisms for user-inputted shifting commands, often resulting in contradictory signals due to mechanical coupling with the shifting cable, which can lead to operational inefficiencies and wear.
Innovation Solution
A gear selection unit design featuring a mount with automatic and tapping channels, a selection lever, a cable pull slider, and connectors, utilizing releasable coupling devices to allow independent mobility and secure the shifting cable, enabling electronic shifting commands without mechanical coupling during tapping mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the selection lever is mechanically coupled to the shifting cable for automatic shifting, then the automatic transmission can be controlled, but contradictory signals are transmitted when tapping mode is activated
Solution Approach 1:
The coupling between the selection lever and cable pull slider is divided into two independent states: mechanically coupled for automatic channel operation, and mechanically separated for tapping channel operation. This segmentation allows the system to eliminate contradictory signals by physically disconnecting the mechanical linkage when electronic tapping mode is activated.
Solution Approach 2:
The coupling device dynamically changes its state based on the selected channel: it provides rigid mechanical coupling when the selection lever is in the automatic channel, and allows mechanical separation when the selection lever is in the tapping channel. This dynamic adaptation ensures reliable signal transmission appropriate for each operating mode.
2Adaptability or versatility
If the selection lever is separated from the cable pull for tapping mode, then electronic shifting commands can be input, but additional components are needed to secure the cable pull
Solution Approach 1:
The coupling device serves multiple functions: it mechanically couples the selection lever to the cable pull slider for automatic channel operation, and it can be released to allow electronic tapping mode. The same component structure handles both coupling and decoupling operations, eliminating the need for separate securing mechanisms.
Solution Approach 2:
The functions of mechanical coupling and mode transition are merged into a single coupling device. The releasable coupling mechanism integrates the automatic and tapping mode operations, allowing the system to switch between mechanical and electronic control without requiring additional separate components for each mode.
3Reliability
If the cable pull is locked in place during tapping mode, then contradictory information is prevented, but the cable pull slider cannot move independently
Solution Approach 1:
The coupling device dynamically adjusts the mobility of the cable pull slider based on the operating mode: it allows free movement when mechanically coupled for automatic channel operation, and it locks the cable pull slider in place when released for tapping channel operation. This dynamic control ensures signal consistency appropriate for each mode.
Data Source
AI summary
The present disclosure provides a gear selection unit for an automatic transmission. The gear selection unit may include a mount having a gate, where the gate has an automatic channel oriented in a longitudinal direction and a tapping channel disposed adjacent to the automatic channel, and where the automatic channel and the tapping channel are connected to one another via a connecting channel. A selection lever may be inserted in the gate, and the selection lever may be pivotably supported in the mount. A cable pull slider may be movably supported in the longitudinal direction in the mount, where the cable pull slider is coupled to the selection lever via a releasable first coupling device when the selection lever is disposed in the automatic channel. A connector may be coupled in the longitudinal direction to the cable pull slider via a second coupling device.