Vehicle Controller Obstacle Torque Reduction
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Solution Overview
Problem
Conventional vehicle control technologies fail to adequately manage sudden increases in vehicle speed when a vehicle encounters an obstacle, leading to occupant discomfort due to rapid speed changes as it comes down on the other side.
Innovation Solution
A vehicle controller system that includes an obstacle-determining portion to identify when a vehicle is climbing up an obstacle and a driving torque reduction mechanism to decrease driving torque, thereby controlling the vehicle's speed and reducing sudden increases when it descends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional vehicle control technology is used, then the vehicle can pass over obstacles, but the vehicle speed increases rapidly when the vehicle comes down on the other side of the obstacle, causing occupant discomfort
Solution Approach 1:
The controller determines whether the vehicle is climbing up an obstacle in advance and performs driving torque reduction control before the vehicle comes down on the other side. This preliminary action prevents the rapid speed increase that would otherwise occur during descent, thereby maintaining occupant comfort.
Solution Approach 2:
The system applies counter-action by reducing driving torque in advance when obstacle climbing is detected. This preliminary anti-action counteracts the tendency for rapid speed increase during obstacle descent, preventing the harmful effect before it occurs.
2Speed
If driving torque is reduced when climbing an obstacle, then rapid speed increases are suppressed, but the vehicle may have difficulty overcoming the obstacle
Solution Approach 1:
The controller dynamically adjusts the driving torque based on the determined driving torque reduction amount, which varies according to vehicle speed and acceleration. This dynamic adjustment allows the system to maintain sufficient power for obstacle overcoming while suppressing excessive speed increases, resolving the contradiction between speed stability and available power.
Data Source
AI summary
A vehicle controller includes an obstacle-determining portion and a driving torque reducing portion. The obstacle-determining portion determines whether the vehicle is climbing up an obstacle, more specifically, whether the vehicle starts climbing up the obstacle. Then, the driving torque reducing portion performs a driving torque reduction control when it is determined that the vehicle is climbing up onto the obstacle.