Driving Tendency Calculation Prohibition for Coasting Accuracy
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Solution Overview
Problem
Existing methods for determining a driver's short-term driving tendency are inaccurate when the vehicle is coasting on congested roads or when the driver does not step on the accelerator pedal, leading to unreliable results and a deterioration in the reliability of vehicle control technologies based on driving tendencies.
Innovation Solution
An apparatus and method that utilize a driving information collecting unit, a short-term driving tendency calculating module applying fuzzy control theory, and a calculation prohibition control module to prohibit calculation of the short-term driving tendency index when the accelerator position sensor opening degree is below a predetermined reference value, which increases proportionally with vehicle speed, ensuring accurate determination by differentiating between mild and sporty driving tendencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the short-term driving tendency is calculated continuously using accelerator pedal opening degree and change rate, then the driving tendency can be determined in normal driving conditions, but the determination becomes inaccurate when the vehicle coasts on congested roads or when the driver does not step on the accelerator pedal
Solution Approach 1:
The patent dynamically adjusts the calculation strategy based on detected driving conditions. When coasting or idle conditions are detected (accelerator pedal opening degree below threshold), the system prohibits tendency calculation to avoid inaccurate results. This dynamic switching between calculation and prohibition modes resolves the contradiction by adapting the measurement process to actual driving conditions.
Solution Approach 2:
The patent introduces a threshold parameter (predetermined reference value) for accelerator pedal opening degree that changes based on vehicle speed. This parameter change enables the system to distinguish between meaningful accelerator input and idle/coasting conditions, thereby improving measurement precision while maintaining reliability across different driving scenarios.
2Device complexity
If the driving tendency calculation is performed without considering vehicle speed and accelerator position, then the system remains simple, but the determination becomes unreliable in coasting and congested road conditions
Solution Approach 1:
The patent performs preliminary detection of driving conditions (vehicle speed, accelerator position) before executing the tendency calculation. By checking whether the accelerator pedal opening degree exceeds the threshold in advance, the system avoids performing calculations under conditions that would yield inaccurate results, thereby improving reliability without significantly increasing complexity.
Solution Approach 2:
The patent introduces an intermediary control module that acts as a gatekeeper between the data collection stage and the tendency calculation stage. This intermediary checks driving conditions and selectively enables or disables the calculation process, ensuring that calculations are only performed when conditions are appropriate, thus improving reliability while maintaining system simplicity.
Data Source
AI summary
An apparatus and a method determines a short-term driving tendency. The apparatus may include a driving information collecting unit configured to collect driving information for determining the short-term driving tendency, a short-term driving tendency calculating module configured to receive input variables for determining the short-term driving tendency and calculate a short-term driving tendency index using a fuzzy control theory, and a calculation prohibition control module configured to check an accelerator position sensor (APS) signal of the vehicle and prohibit calculation of the short-term driving tendency index when an APS opening degree is equal to or less than a predetermined reference value.