A power assembly integrated control method of a heavy commercial vehicle

Abstract

This invention relates to the field of energy-saving control technology for heavy-duty commercial vehicles, specifically to an integrated control method for the powertrain of heavy-duty commercial vehicles. First, it predicts the terrain conditions and engine high, medium, and low load ranges in the near future based on past terrain changes. Then, it establishes fuel consumption models for the engine under these three conditions, integrating control of engine torque, AMT shifting, and fan speed to reduce overall vehicle energy consumption. For torque control, it sets torque offset based on operating conditions and gear position, and outputs corrected engine torque in conjunction with load and acceleration. For AMT control, six shifting modes achieve optimal shifting under different modes and operating conditions, balancing engine model, economy, and power. For fan control, it differentiates between high and low cooling needs, using corrected coolant temperature to determine fan speed and reduce power consumption. According to real-vehicle verification, this method can save 1.5% fuel, reducing CO2 emissions by approximately 1950 kg per vehicle per year in the standard-load logistics transportation market.

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