Rotary Shift Knob Input Device with Speed-Adaptive Force Control
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Solution Overview
Problem
In rotary shift operating devices, the forces required to rotate the knob between different gear positions are not differentiated based on vehicle speed, leading to potential erroneous operations as the forces for rotating the knob when stopped and running are similar, which can result in selecting an inappropriate shift position.
Innovation Solution
An input device with a knob, rotation shaft, rotation controller, detector, and controller that adjusts the rotational operation force based on vehicle speed, using a storage to store patterns of rotational operation forces and prohibitions, ensuring the operator is alerted to differences in rotational forces and preventing erroneous operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotational operation force is made heavy for all gear position changes, then erroneous operations are prevented, but ease of operation deteriorates
Solution Approach 1:
The rotational operation force is made dynamically adjustable based on vehicle speed. When the vehicle is running, the rotation controller increases the rotational operation force to prevent erroneous operations. When the vehicle is stopped, the rotation controller reduces the rotational operation force to ease operation. This dynamic adjustment resolves the contradiction by adapting the force level to the operational context.
Solution Approach 2:
The parameter of rotational operation force is changed according to vehicle speed conditions. The rotation controller modifies this parameter in real-time: increasing it during vehicle operation to prevent errors, and decreasing it when the vehicle is stopped to improve ease of operation. This parameter change strategy directly addresses the technical contradiction.
2Ease of operation
If the rotational operation force is made light for ease of operation, then ease of operation improves, but reliability of preventing erroneous operation deteriorates
Solution Approach 1:
The system dynamically adjusts the rotational operation force based on real-time vehicle speed detection. When the vehicle is running, the rotation controller automatically increases the force requirement to prevent erroneous gear selection. When stopped, it reduces the force requirement for ease of operation. This dynamic response resolves the contradiction by making the force adaptive to operational safety needs.
Solution Approach 2:
The rotational operation force parameter is modified according to vehicle speed conditions detected by the detector. The rotation controller changes this parameter to be light when the vehicle is stopped (improving ease of operation) and heavy when the vehicle is running (improving reliability). This parameter adjustment strategy directly resolves the technical contradiction.
3Reliability
If the rotational operation force is increased based on vehicle speed, then erroneous operations are prevented, but device complexity increases
Solution Approach 1:
The rotation controller serves multiple functions: it detects vehicle speed via the detector, determines appropriate rotational operation force levels, and actuators to apply the appropriate force. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing device complexity while achieving reliable erroneous operation prevention.
Solution Approach 2:
The rotation controller acts as an intermediary between the vehicle speed detector and the gear selection mechanism. It processes speed information and mediates the rotational operation force application through the actuator. This intermediary role allows complex control logic to be centralized in one component rather than distributed across multiple specialized components, managing overall system complexity.
Data Source
AI summary
A pattern of a rotational operation force is changed by a state of a device of an input object. An input device includes a knob, a rotation shaft body that rotates together with the knob, a rotation controller that is capable of changing a rotational operation force, a detector that detects a rotational position, a controller, and a storage that stores a plurality of patterns. The controller reads a pattern from the storage according to a pattern signal input from an outside and controls the rotation controller when the knob is operated to be rotated according to a rotational position detected by the detector and the read pattern.