Load change based demand torque control method, system, and vehicle

By constructing a three-dimensional demand torque MAP and slope correction, combined with buffer transition technology, the power and economy issues of commercial vehicles caused by load changes are solved, realizing adaptive torque adjustment and smooth switching, and improving energy utilization efficiency and power response.

CN121340937BActive Publication Date: 2026-07-24CHERY COMMERCIAL VEHICLE (ANHUI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHERY COMMERCIAL VEHICLE (ANHUI) CO LTD
Filing Date
2025-10-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional commercial vehicle engine control systems cannot effectively adjust torque when the load changes, resulting in redundant energy consumption at low loads and insufficient power at heavy loads, affecting the vehicle's power and economy.

Method used

By detecting changes in vehicle load in real time, a three-dimensional torque demand map is constructed, and the torque demand is calculated under slope correction. The torque is smoothly switched by using a buffer transition, ensuring that the power response meets the driver's expectations.

Benefits of technology

Energy utilization has been optimized to avoid over-acceleration or underpoweredness due to load changes, providing a power response that better meets the driver's expectations, especially when load changes are large.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a load change-based demand torque control method, system and vehicle, and the method is as follows: (1) when the vehicle is in a stationary state, the actual load mass of the vehicle is read, and the load rate lambda corresponding to the current actual load mass is calculated; (2) the demand torque MAP under the current load rate lambda is extracted, and after the vehicle is in a running state, the demand torque MAP under the current load rate is used to determine the demand torque of the vehicle. When the change of the load rate is detected, the demand torque MAP is adaptively adjusted, so that the excessive acceleration or power deficiency caused by the change of the load is avoided, the energy utilization is optimized, and the power response more in line with the expectation of the driver is provided, especially when the change of the load is large (such as after sudden unloading).
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