Vehicle Control Apparatus Motor Speed Reduction Undrivable State
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Solution Overview
Problem
In vehicles capable of automated driving, if the vehicle overturns, the electric motor may continue to operate, causing wheels to spin and potentially hinder escape or rescue efforts, and high voltage can lead to electrical shock or sparks, even if the vehicle is undrivable.
Innovation Solution
A vehicle control apparatus that determines the drivable state of the vehicle based on positional relationships with the environment and reduces the rotation speed of the electric motor when the vehicle is undrivable, using a determining portion and a rotation speed reducing portion to set the motor speed below a predetermined threshold or stop it completely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated driving control is implemented, then driving automation is achieved, but the motor continues to operate after vehicle overturning causing safety hazards
Solution Approach 1:
The control apparatus predicts future drivable states using current sensor data and vehicle state information. When a future undrivable state is predicted, the system proactively reduces motor rotation speed before the actual undrivable condition occurs, preventing wheel spinning and electrical hazards during automated driving operations
Solution Approach 2:
The system continuously monitors sensor data including vehicle orientation, acceleration, and motor state. This feedback loop enables real-time determination of drivable states and triggers automatic motor speed reduction when undrivable conditions are detected or predicted, creating a closed-loop safety control mechanism for automated driving
2Object-affected harmful factors
If motor rotation speed is reduced when undrivable, then safety hazards are prevented, but control complexity increases
Solution Approach 1:
The control apparatus integrates multiple functions into a single system: it determines current and future drivable states, predicts vehicle conditions, controls motor rotation speed, and manages power supply. This multi-functional integration achieves safety control without proportionally increasing overall system complexity
Solution Approach 2:
The control apparatus uses its own sensor data and state information to autonomously determine drivable states and trigger appropriate motor control actions. The system self-regulates motor speed based on internal predictions without requiring external intervention, simplifying the control architecture while maintaining safety
Data Source
AI summary
A vehicle control apparatus includes a driving state determining portion configured to determine whether the vehicle is in a drivable state at a present time or will be in a drivable state at a point in time after a predetermined period of time has passed from the present time, based on data indicative of a positional relationship between the vehicle and a surrounding environment, that is used in the autonomous driving mode; and a rotation speed reducing portion configured to reduce a rotation speed of the electric motor when it is determined that the vehicle is in an undrivable state at the present time or will be in an undrivable state at the point in time after the predetermined period of time has passed, and the rotation speed of the electric motor is equal to or greater than a predetermined rotation speed.