Vehicle Control Device Acceleration Adaptation
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Solution Overview
Problem
Vehicle occupants may be less concentrated and fail to look ahead while a vehicle control device performs start control, leading to the host vehicle traveling a long distance before the occupant initiates driving operation.
Innovation Solution
A vehicle control device that recognizes a preceding vehicle and adjusts acceleration based on predefined control states, allowing for start control that varies in burden on the occupant, with lower acceleration in states where the burden is minimal and higher acceleration in states where the burden is greater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle control device performs automatic start control with high acceleration, then the productivity of vehicle starting is improved, but the vehicle occupant may fail to respond to emergency situations because they are less concentrated on the travel
Solution Approach 1:
The patent applies dynamics by making the acceleration parameter adjustable based on the control state. The system dynamically switches between first acceleration (lower) and second acceleration (higher) depending on whether the current control state requires the occupant to be concentrated or not. This resolves the contradiction by making the system adaptable rather than fixed.
Solution Approach 2:
The patent changes the acceleration parameter based on control state. When the control state changes from a state requiring occupant concentration to a state where concentration is less critical, the system increases the acceleration parameter from the first acceleration to the second acceleration, optimizing both safety and productivity.
2Loss of time
If the vehicle control device performs start control with high acceleration, then the time required for the occupant to respond is reduced, but the occupant burden increases when frequent monitoring is required
Solution Approach 1:
The system dynamically adjusts acceleration based on the control state. When the control state requires frequent occupant monitoring, the system uses lower first acceleration to reduce burden. When monitoring is less critical, the system switches to higher second acceleration to reduce response time, thus adaptively resolving the contradiction.
Solution Approach 2:
The acceleration parameter is changed according to the control state. The system selects between first acceleration and second acceleration based on whether the current control state requires occupant concentration, thereby optimizing the balance between response time and ease of operation for different driving scenarios.
3Device complexity
If the vehicle control device uses a single acceleration value for start control, then the device complexity is reduced, but the adaptability to different control states is limited
Solution Approach 1:
The travel control unit is designed to perform multiple functions: it controls acceleration based on both the preceding vehicle's behavior and the current control state. This multi-functionality allows the system to adapt to different control states without adding significant complexity, as the same control unit handles both speed control and state-based acceleration selection.
Solution Approach 2:
The system implements dynamic adaptability by adjusting the acceleration parameter based on the control state. The travel control unit receives the control state from the control state setting unit and dynamically selects between first and second acceleration values, providing versatility without requiring separate control systems for each scenario.
Data Source
AI summary
In start control, a travel control unit makes a first acceleration in a first control state set by a control state setting unit, lower than a second acceleration in a second control state set by the control state setting unit. A burden on a vehicle occupant in the second control state is larger than that in the first control state.