A calibration method for torque distribution in rear-wheel drive DHT parallel mode

By comprehensively considering the efficiency of the engine, motor, battery, and transmission system, the torque distribution calibration method in the DHT parallel mode is optimized, solving the problem of low overall system efficiency in the existing technology and improving the vehicle's power and economy.

CN116451339BActive Publication Date: 2026-06-30HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
Filing Date
2023-03-06
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing technology of DHT parallel mode, the torque distribution calibration method fails to comprehensively consider the efficiency of the engine, motor, battery and transmission system, which may cause the motor to work in an inefficient area, the battery to have low high-power charging and discharging efficiency, and the overall system efficiency to be low.

Method used

By preparing data, determining the powertrain operating data table, discretizing operating data, screening the optimal torque distribution scheme, merging and generating a calibration data table, and using simulation software to verify the control strategy, the DHT powertrain is ensured to operate with optimal system efficiency.

Benefits of technology

It achieves optimal system efficiency for the DHT powertrain, improving vehicle performance and fuel economy, and avoiding the overall inefficiency caused by simply considering engine efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A calibration method for torque distribution in a rear-wheel-drive DHT parallel mode is disclosed, belonging to the field of automotive automatic transmission control. The method is as follows: data preparation; determining and discretizing the powertrain operating data table; selecting the optimal torque distribution scheme; generating a calibration data table; writing the calibration results into the control strategy; using simulation software, inputting specified vehicle data, and equipping the vehicle with the corresponding engine and rear-wheel-drive DHT, evaluating the torque distribution portion of the control strategy in the DHT parallel mode through simulation analysis. If the simulation results show that the power and economy meet the design goals, the calibration data for the torque distribution in the DHT parallel mode of the control strategy is qualified; otherwise, it is unqualified. This invention effectively avoids the situation where simply considering engine efficiency leads to low efficiency of the motor, battery, and transmission system, resulting in low efficiency of the entire DHT powertrain system, thus effectively improving the power and economy of vehicles equipped with DHT.
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