Adaptive control method for intermediate shaft brake of commercial vehicle transmission without synchronizer

Abstract

The invention relates to a self-adaptive control method for a synchronizer-free transmission intermediate shaft brake of a commercial vehicle. The method is characterized by specifically including the steps a transmission control unit (TCU) needs to learn initial parameters of a newly-matched transmission intermediate shaft brake system and learns the initial parameters of the intermediate shaft brake on the conditions that the vehicle is static and an engine is idle; the TCU learns control parameters of separation of a clutch and braking of the intermediate shaft brake in the learning process of the initial parameters of the intermediate shaft brake, outputs the parameters of the intermediate shaft brake after learning is completed and gets connected to the clutch; and the TCU realizes the function of learning the parameters of the intermediate shaft brake and automatically loads data of the parameters of the intermediate shaft brake after recharged. The method has the advantages that the control adaptability is high, the control robustness is good, data of the TCU are calibrated little, the research and development cycle of products is short, and the homogeneity of the products is good.

Description

technical field [0001] The invention relates to an adaptive control method for an intermediate shaft brake of a non-synchronized transmission of a commercial vehicle, which belongs to the field of automatic mechanical transmissions (AMT) of commercial vehicles. Background technique [0002] In the field of commercial vehicle automatic transmissions, especially in the field of heavy-duty truck automatic transmissions, AMT automatic transmissions have gradually become the main form of commercial vehicle automatic transmissions. In foreign countries, the AMT transmission technology for commercial vehicles has matured, and major automobile manufacturers have launched their own AMT transmission products one after another. Domestically, various automobile manufacturers have also accelerated the pace of research and development of AMT transmission products, striving to break through the key technology of commercial vehicle AMT product development. AMT transmission has the characte...

AI Technical Summary

Problems solved by technology

At the same time, the traditional control method must strictly limit the special characteristic parameters of the components of the intermediate shaft brake. When the characteristics of the components of the intermediate shaft brake change slightly, the components must be replaced to ensure the shifting quality of the AMT transmission.

The use of traditional control methods has the characteristics of long development cycle of AMT transmission products, heavy workload of TCU data calibration, poor product adaptability and high product maintenance costs

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