Rotary Shift Control With Dynamic Locking for Unintended Shift Prevention
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Solution Overview
Problem
Existing shift apparatuses with dial-shaped operation members struggle to appropriately regulate rotation, leading to excessive or unintended shifts due to delayed restriction mechanisms, particularly when the operation member is rotated quickly.
Innovation Solution
A shift apparatus with a position detection unit, shift control section, regulation mechanism, and shift state determination section that selectively locks or unlocks the operation member based on position and restriction states, ensuring appropriate range switching and preventing unintended shifts during quick operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the regulation mechanism restricts rotation of the operation member, then unintended shifts are prevented, but the operation member cannot be rotated quickly when needed
Solution Approach 1:
The regulation mechanism transitions from a static locked state to a dynamic unlocked state based on detected shift restriction conditions. When no restriction is detected, the regulation mechanism unlocks to allow quick rotation; when restriction is detected, it locks to prevent unintended shifts. This dynamic state change resolves the contradiction between allowing fast operation and preventing unintended shifts.
Solution Approach 2:
The system uses feedback from the shift state determination section to control the regulation mechanism. The shift state determination section continuously monitors shift restriction states and provides feedback to the operation control section, which then adjusts the regulation mechanism accordingly. This feedback loop ensures the regulation mechanism responds appropriately to actual shift conditions, allowing quick rotation when safe and preventing unintended shifts when risky.
2Productivity
If the shift control section responds quickly to operation member rotation, then shift range switching is responsive, but the regulation mechanism cannot restrict rotation in time
Solution Approach 1:
The system performs preliminary detection of shift restriction states before the operation member is rotated. The shift state determination section proactively identifies potential shift restriction conditions (such as improper shift sequences or unsafe conditions) and prepares the regulation mechanism in advance. This preliminary action allows the regulation mechanism to be ready to restrict rotation immediately when the operation member is turned, preventing unintended shifts while maintaining responsive shift control.
3Ease of operation
If the operation member can be rotated freely, then quick shift changes are enabled, but excessive rotation and unintended shifts occur
Solution Approach 1:
The regulation mechanism acts as an intermediary between the operation member and the shift control system. It mediates the rotation of the operation member by selectively locking or unlocking based on detected conditions. When conditions are safe, the intermediary allows free rotation for quick shift changes; when conditions indicate potential harm, the intermediary blocks rotation to prevent excessive rotation and unintended shifts. This intermediary function resolves the contradiction between ease of operation and prevention of harmful effects.
Data Source
AI summary
An embodiment of the invention is to provide a shift apparatus that performs switching of shift ranges of a vehicle, the shift apparatus including: an operation member; a shift control section; and a regulation mechanism, wherein the shift control section is configured to select a second range when the operation member moves from a first position to a second position before being regulated by the regulation mechanism, and the shift control section is configured to select a first range when that a shift mechanism is in a shift restriction state and the operation member moves from the first position to the second position before being regulated by the regulation mechanism, and to allow an operation control section to execute the regulation by the regulation mechanism.