Vehicle Shift Control Using Short-Term Driving Tendency Index
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Solution Overview
Problem
Existing methods for determining a driver's driving tendency are inadequate as they assume a constant tendency, failing to account for temporary changes in the driver's feelings, road conditions, and other factors, leading to dissatisfaction due to mismatched vehicle performance.
Innovation Solution
A method and system that calculate a short-term driving tendency index based on elapsed time and acceleration increment, using sensors to detect accelerator pedal position, vehicle speed, and road gradient, allowing for precise determination and reflection of the driver's will in shift control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If long-term learning methods are used to determine driving tendency, then the system can capture overall driving patterns, but it fails to reflect temporary changes in driver's feeling or driving will
Solution Approach 1:
The patent segments the driving tendency determination into two distinct components: long-term driving tendency (capturing overall patterns) and short-term driving tendency (capturing temporary changes). This segmentation allows the system to independently process and weigh different time-scale behaviors, resolving the contradiction between capturing overall patterns and responding to temporary changes.
Solution Approach 2:
The system dynamically adjusts the weighting between long-term and short-term driving tendencies based on current driving conditions. When rapid changes in accelerator pedal position are detected, the short-term tendency gains higher weight, allowing the system to adapt to temporary driving condition changes while maintaining the benefit of long-term pattern recognition.
2Ease of operation
If accelerator pedal position and change rate are used as main parameters, then the system can capture acceleration intent, but it cannot fully reflect the driver's actual will due to limitations in these parameters
Solution Approach 1:
The patent introduces the concept of driving tendency index as an intermediary parameter that synthesizes multiple factors including accelerator pedal position, change rate, and the novel short-term/long-term tendency components. This intermediary provides a more comprehensive representation of driver will that goes beyond simple pedal parameters while remaining computationally tractable.
Solution Approach 2:
The driving tendency determination uses a composite approach, combining long-term driving tendency, short-term driving tendency, and traditional parameters (accelerator position and change rate) into a unified driving tendency index. This composite structure allows the system to leverage the simplicity of traditional parameters while incorporating the enhanced accuracy of multi-factor analysis.
3Stability of the object's composition
If the vehicle performance is set to one fixed characteristic, then the vehicle model remains consistent, but it cannot coincide with varying driver tendencies
Solution Approach 1:
The patent implements dynamic adjustment of shift control characteristics based on the calculated driving tendency index. The system maintains a base performance characteristic but dynamically modifies shift timing and patterns according to the driver's current tendency, whether determined by long-term patterns or short-term changes. This allows the vehicle to adapt to varying driver tendencies while maintaining overall performance consistency.
Data Source
AI summary
A method of determining a driving tendency and a system of controlling shift using the same are disclosed. A system of controlling shift for a vehicle may include: a data detector detecting data for a shift control; and a controller determining a short term driving tendency index and a long term driving tendency index, and controlling an engine or a transmission according to the long term driving tendency index, wherein the controller determines the short term driving tendency when an accelerator pedal position reaches a predetermined position value while the vehicle is coasting.