Retractable Vehicle Gearshift Paddle for Steering Safety

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Solution Overview

Problem

Paddle gearshift selector systems in vehicles are prone to accidental activation during rapid steering maneuvers, leading to unintended gear shifts, especially when the steering wheel is turned or when the paddles come into contact with the driver's legs or clothing, causing inconvenience and potential safety issues.

Innovation Solution

A retractable control member for the gearshift system that can be moved between a deployed and retracted state, using an electric motor or cam mechanism to position the control member out of the way when not in use, preventing accidental activation and allowing manual gear shifts only when needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If paddle gearshift selectors are positioned close to the steering wheel for easy access, then ease of operation is improved, but the risk of accidental activation during steering maneuvers increases

Engineering Contradiction:
Improveease of gearshift operationVSAvoidrisk of accidental activation
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The gearshift selector is designed to be movable between a first position (deployed) and a second position (retracted). The controller automatically transitions the selector between these positions based on detected steering wheel movements, making the system dynamic rather than static. This resolves the contradiction by allowing easy access when needed while preventing accidental activation during steering maneuvers.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The controller detects steering wheel movements in advance and proactively retracts the gearshift selector before accidental activation can occur. By anticipating the potential hazard through steering detection and taking preliminary retraction action, the system prevents accidental gearshift activation while maintaining ready access when the steering wheel is in normal position.

Inventive Principle:
Principle #10Preliminary action

2Ease of operation

If the steering wheel can be turned freely for maneuvering, then ease of operation is improved, but the paddles may foul the driver's legs or clothing causing unintended gear shifts

Engineering Contradiction:
Improvesteering maneuverabilityVSAvoidpaddle contact with driver's legs or clothing
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The controller acts as an intermediary between the steering wheel and the gearshift selector. It monitors steering wheel position and uses this information to control the selector's deployment state, creating a mediating layer that prevents direct harmful interaction between the steering motion and the gearshift paddle, thereby eliminating the hazard of paddle contact with driver's legs or clothing.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The gearshift selector dynamically adjusts its position based on steering wheel angle. When the steering wheel is turned beyond a threshold angle, the selector automatically retracts to avoid contact with the driver's legs or clothing. This dynamic adaptation allows full steering maneuverability while preventing the harmful contact that would cause unintended gear shifts.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10731749B2Input device for a vehicle control system
Publication Date: 2020.08.04 JAGUAR LAND ROVER LTD
  • US10731749B2 patent drawing
  • US10731749B2 patent drawing
  • US10731749B2 patent drawing

AI summary

An input device for use in a vehicle steering assembly. The input device includes at least one user-operable control member which is moveable between a deployed state and a retracted state. When a control member is in its deployed state it is operable to provide an input to a vehicle control system, and when retracted, it is moved to a position that avoids accidental actuation. In a particular example, the or each control member is a paddle shaped lever which is used to send gear change requests to an automatic transmission, and the lever is retracted when gear change requests do not need to be sent.