Automotive Transmission Shift Lever Gate Plate Integration
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Solution Overview
Problem
Current automotive transmissions require separate gate plates for automatic and manual shift modes, leading to complex structures and increased costs, while also posing a risk of accidental shift mode selection.
Innovation Solution
An automotive transmission system that allows for easy selection of shift modes using a single gate plate, with a shift lever and mode selection unit that blocks unwanted shift positions, preventing accidental mode changes and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate gate plates are used for automatic and manual shift modes, then each mode can have dedicated shift positions, but the structure becomes complicated and cost increases
Solution Approach 1:
The patent combines automatic and manual shift mode gate plates into a single integrated gate plate. The gate plate includes both automatic shift positions (P, R, N, D) and manual shift positions (1-6 gears) on the same structure, eliminating the need for separate gate plates for each mode. This merging approach maintains functional differentiation while simplifying the overall structure and reducing component count.
Solution Approach 2:
The single gate plate is designed to serve multiple functions by accommodating both automatic and manual shift modes. It includes position holes for automatic shifting and additional position holes for manual gear selection, allowing the same gate plate to control both shifting methods. This multi-functional design eliminates the need for mode-specific gate plates while maintaining proper shift position control.
2Reliability
If separate gate plates are used for automatic and manual shift modes, then each mode has dedicated shift positions, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple gate plates into a single integrated component that handles both automatic and manual shift modes. This consolidation reduces the total number of parts that need to be manufactured, inventoried, and assembled, thereby lowering manufacturing costs while maintaining proper shift position control through the unified gate plate structure.
3Device complexity
If a single gate plate is used for both automatic and manual shift modes, then structure is simplified and cost is reduced, but shift positions from unselected modes may be accidentally accessible
Solution Approach 1:
The patent employs a movable blocking member that can dynamically block access to manual shift positions when automatic mode is selected. The blocking member is positioned to prevent the shift lever from reaching manual gear positions (1-6) during automatic operation, but can be moved away when manual mode is actively selected. This dynamic blocking mechanism ensures safety while maintaining the simplified single gate plate structure.
Solution Approach 2:
The blocking member acts as an intermediary element between the shift lever and the manual shift positions on the gate plate. It mediates access control by physically blocking certain positions based on the selected mode, preventing accidental engagement of manual gears during automatic operation while allowing full access when manual mode is properly selected through the mode selection unit.
Data Source
AI summary
Disclosed herein is an automotive transmission which includes shift lever which moves in a first direction and a second direction to select a shift position and a shift mode selection unit which is installed at one side of the shift lever to select a shift mode. Additionally, the disclosed automotive transmission also includes a shift blocking unit which selectively blocks movement of the shift lever in the first direction and the second direction such that a shift position of the selected shift mode is selected.