Motive Force Capacity Parameter for Vehicle Gear Control
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Solution Overview
Problem
Current methods for controlling motor vehicle functions do not adequately account for the vehicle's running situation, leading to suboptimal gear change strategies and increased fuel consumption due to insufficient information content in input parameters.
Innovation Solution
A method and system for determining a parameter representing the motive force capacity of a motor vehicle, calculated as the difference between maximum motive force and current running resistance, which is used to improve control and performance by considering the vehicle's running situation, and further standardizing this into an acceleration capacity parameter for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional control parameters are used for gear change strategies, then the control system is simple to implement, but fuel consumption increases due to insufficient information about the vehicle's running situation
Solution Approach 1:
The patent introduces a new parameter RF (motive force capacity) that combines multiple existing parameters (engine torque, transmission ratio, running resistance) into a single comprehensive indicator. This parameter transformation allows the control system to capture the vehicle's running situation more effectively, enabling optimized gear change strategies that reduce fuel consumption without requiring complex additional sensors or systems.
2Measurement precision
If the motive force capacity parameter RF is calculated using multiple input parameters, then the control accuracy improves, but the device complexity increases
Solution Approach 1:
The parameter RF serves multiple functions within the control system: it indicates motive force capacity, guides gear change decisions, and reflects the vehicle's running situation. By making this single parameter multi-functional, the patent achieves high control accuracy without proportionally increasing device complexity, as the same parameter supports multiple control objectives.
Solution Approach 2:
The calculation of RF is segmented into distinct components: engine torque determination, transmission ratio identification, and running resistance calculation. Each component can be independently computed from existing sensor data, allowing the complex overall calculation to be broken down into manageable steps that can be implemented efficiently in the control system.
3Loss of energy
If gear change strategies are optimized based on running situation, then fuel consumption decreases, but the control system complexity increases
Solution Approach 1:
The gear change strategy transitions from static, pre-programmed shift points to a dynamic system that continuously calculates RF based on real-time operating conditions. This dynamic approach allows the control system to adapt gear changes to the actual running situation, optimizing fuel consumption while using the same hardware infrastructure without significant additional complexity.
Data Source
AI summary
A method for determination of a first parameter RF which represents a motive force capacity of a motor vehicle (1) provided with a power train which may assume various transmission ratios for propulsion of the vehicle (1). The vehicle includes an engine (10) and a gearbox (20). The first parameter RF is determined on the basis of a difference between a first motive force FMax and a second motive force FDr. The first motive force FMax is a maximum motive force available for the vehicle (1) at a current transmission ratio. The second motive force FDr is a current running resistance for the vehicle (1). There is a use of such a parameter. A computer program, a computer program product, a system and a motor vehicle related to such a parameter are disclosed.