Vehicle Control Device with Dynamic Accelerator Threshold
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Solution Overview
Problem
Existing vehicle control devices fail to effectively suppress dangerous situations caused by erroneous accelerator operations without causing driver discomfort, as they use a fixed abnormality judgment threshold for accelerator operation, leading to inappropriate vehicle acceleration or deceleration based on predetermined values that do not account for varying risk levels.
Innovation Solution
A vehicle control device that includes an operating amount acquiring means, a peripheral environment detecting means, and a risk calculating means to set a dynamic threshold for accelerator operation based on calculated risk, allowing for adaptive control to suppress dangerous situations by adjusting engine and brake actuator targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed predetermined value C is used as the abnormality judgment threshold for accelerator operation, then the vehicle speed can be reduced when the accelerator is mistakenly operated, but the driver experiences discomfort when the threshold is inappropriate for the current risk level
Solution Approach 1:
The patent applies dynamics by making the abnormality judgment threshold dynamic rather than fixed. The threshold is adjusted in real-time based on the detected peripheral environment and calculated risk level. When risk is high (e.g., short inter-vehicle distance), the threshold is lowered to trigger suppression control more easily. When risk is low, the threshold is raised to avoid unnecessary suppression and maintain driver comfort. This dynamic adjustment resolves the contradiction between reliable danger suppression and driver comfort.
Solution Approach 2:
The patent changes the parameter of the abnormality judgment threshold based on environmental conditions and risk calculations. Instead of using a constant predetermined value C, the system calculates a risk value from peripheral environment data (such as distance to other vehicles, road conditions) and adjusts the threshold accordingly. This parameter change allows the system to maintain high reliability in dangerous situations while preserving driver comfort in normal conditions.
2Reliability
If the predetermined value C is set low to prevent acceleration in dangerous situations, then vehicle safety improves, but the vehicle accelerates inappropriately when the accelerator is lightly stepped on in safe situations
Solution Approach 1:
The system dynamically adjusts the abnormality judgment threshold based on the calculated risk value from peripheral environment detection. In dangerous situations (high risk), the threshold is lowered to prevent inappropriate acceleration. In safe situations (low risk), the threshold is raised to allow normal accelerator operations. This dynamic adaptation enables the system to respond appropriately to varying risk levels, resolving the contradiction between safety and adaptability.
Solution Approach 2:
The patent changes the threshold parameter based on environmental risk assessment. The risk calculation unit computes a risk value from detected peripheral conditions, and the abnormality judgment unit adjusts the threshold accordingly. This parameter change strategy allows the system to maintain vehicle safety in dangerous situations while avoiding false suppression in safe situations, achieving both safety and adaptability.
3Ease of operation
If the predetermined value C is set high to allow normal accelerator operations, then driver comfort improves, but the vehicle may accelerate inappropriately when the accelerator is mistakenly operated in dangerous situations
Solution Approach 1:
The system dynamically adjusts the abnormality judgment threshold based on real-time risk assessment from peripheral environment detection. In safe situations, the threshold is set high to allow normal accelerator operations and maintain driver comfort. In dangerous situations, the threshold is lowered to detect and suppress erroneous accelerator operations. This dynamic adjustment resolves the contradiction between driver comfort and reliability.
Solution Approach 2:
The patent adjusts the threshold parameter dynamically based on calculated risk values from peripheral environment data. When the risk is low, the threshold remains high to avoid unnecessary suppression and maintain driver comfort. When the risk is high, the threshold is lowered to ensure erroneous accelerator operations are detected and suppressed. This parameter change strategy resolves the contradiction between comfort and safety.
Data Source
AI summary
A vehicle control device is provided that performs control to suppress a dangerous situation for a vehicle without causing a driver to experience discomfort when an accelerator is erroneously operated, by setting an abnormality judgment threshold for the accelerator operation to a value based on a degree of risk to the vehicle. An accelerator position judgment threshold is set to be lower when risk in the periphery of the vehicle is higher, intermediate when the risk is intermediate, and higher when the risk is lower. When the risk is higher, an abnormality judgment is made upon the accelerator being lightly stepped on, and control is performed to suppress a dangerous situation. As the risk changes to intermediate and lower, the abnormality judgment is made at a greater accelerator position.