Transmission Shift Evaluation Using Ideal vs Actual Output Parameters
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Solution Overview
Problem
The complexity of selecting and tuning transmission types for vehicles has increased due to stricter fuel efficiency and emissions regulations, requiring a method to evaluate and optimize transmission behavior both on real vehicles and through simulation.
Innovation Solution
A method that analyzes transmission devices with multiple gear ratios, using a transmission control unit to control switching processes based on operating points and additional parameters, determining representative parameters for switching behavior by comparing actual output parameters with ideal ones, and calculating characteristic values for evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If automated manual transmissions or dual-clutch transmissions are used instead of traditional automatic transmissions, then fuel consumption is reduced, but the complexity of selecting and tuning transmission types increases
Solution Approach 1:
The patent applies parameter changes by systematically varying transmission control parameters (shift points, shift duration, torque management) to optimize transmission behavior. The method evaluates multiple parameter sets to find optimal configurations that reduce fuel consumption while maintaining performance across different transmission types.
Solution Approach 2:
The patent implements preliminary action by conducting comprehensive evaluation and optimization of transmission behavior during the development phase using simulation models. This allows transmission parameters to be pre-tuned before actual vehicle assembly, reducing the complexity of field adjustments and ensuring optimal fuel efficiency from deployment.
2Use of energy by moving object
If multiple gear ratios are implemented to improve fuel efficiency, then fuel consumption decreases, but the complexity of transmission control and evaluation increases
Solution Approach 1:
The patent applies segmentation by breaking down the transmission evaluation process into distinct components: shift point determination, shift duration analysis, torque management evaluation, and output parameter assessment. This modular approach simplifies the control of complex multi-gear transmissions by addressing each aspect separately through systematic measurement and optimization.
3Use of energy by moving object
If transmission switching operations are optimized for fuel efficiency, then fuel consumption is reduced, but the precision of evaluating shifting behavior becomes more critical
Solution Approach 1:
The patent implements feedback by continuously monitoring actual transmission output parameters (shaft speeds, torques, temperatures) and comparing them against target values. This closed-loop evaluation system provides precise measurement of shifting behavior, enabling accurate assessment of fuel efficiency improvements while maintaining control precision.
Solution Approach 2:
The patent replaces physical trial-and-error testing with simulation-based evaluation methods. By using computational models to predict transmission behavior and fuel consumption, the system achieves high measurement precision without the variability inherent in physical testing, allowing more accurate evaluation of optimization results.
Data Source
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AI summary
The invention relates to a method for evaluating a transmission device using various characteristic variables, said variables can be determined by means of variable or constant parameters.