Electric Drive Axle Torque Distribution by Efficiency State
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Solution Overview
Problem
Existing methods for distributing torques in electric drive axles of heavy trucks do not achieve the most economical torque combination, leading to suboptimal power consumption due to differences in efficiency and maximum carrying torque values between axles.
Innovation Solution
A method and apparatus that determine the most economical torque combination by receiving wheel end demand torque, calculating energy efficiency states, and screening torque combinations for maximum power based on axle limit values and efficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If torques are distributed equally to the two electric drive axles, then the control is simple, but the power consumption is not minimized because the efficiency and maximum carrying torque values of the two axles are different
Solution Approach 1:
The patent changes the torque distribution parameters dynamically based on the operating conditions and efficiency characteristics of each axle. By calculating different torque combinations and selecting the optimal distribution ratio that maximizes overall efficiency, the system adapts the torque parameters to minimize power consumption while maintaining simple control through automated calculation.
2Use of energy by moving object
If the most economical torque combination is determined through efficiency calculation, then power consumption is minimized, but the calculation complexity increases
Solution Approach 1:
The patent performs preliminary calculations of efficiency characteristics and torque combinations in advance, storing efficiency data for different operating states. During actual operation, the system retrieves pre-calculated efficiency information and selects the optimal torque distribution from predetermined combinations, significantly reducing real-time calculation complexity while maintaining the ability to minimize power consumption.
Data Source
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AI summary
The present application relates to a method for distributing torques of electric drive axles, the method comprising: receiving a wheel end demand torque; determining a corresponding energy efficiency calculation state and all torque combinations based on the wheel end demand torque and limit values of the electric drive axles; calculating corresponding power using efficiency of the electric drive axles for each of all torque combinations, respectively; and screening a torque combination corresponding to the maximum power to determine the most economical torque combination. The present application also relates to an apparatus for distributing torques of electric drive axles, a computer-readable storage medium, a computer program product, and an electric drive axle system.