An adaptive control method for intermediate shaft brake

By using an adaptive control method, abnormal resistance in the transmission chain of the intermediate shaft brake is identified and overcome. The inflation time is extended and a cycle verification mechanism is set up, which solves the problem of shifting failure in the intermediate shaft brake control under abnormal working conditions, and achieves the effects of smooth shifting and reduced maintenance costs.

CN122407781APending Publication Date: 2026-07-17FAW JIEFANG AUTOMOTIVE CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FAW JIEFANG AUTOMOTIVE CO
Filing Date
2026-05-26
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing intermediate shaft braking control cannot quickly reduce speed when faced with abnormal mechanical resistance in the transmission chain, resulting in gear shift failure. Furthermore, it relies on manual adjustment of braking parameters, leading to high maintenance costs, and conventional control strategies are prone to falling into ineffective control loops.

Method used

By using an adaptive control method, the duration of the opening request and the threshold for secondary air replenishment are obtained, the deceleration obstruction state is identified, the inflation time is extended and the brake air pressure is increased, and a brake opening count verification mechanism is set to prevent repeated inching and ensure synchronous engagement of the transmission.

Benefits of technology

It enables automatic adjustment of inflation parameters under abnormal operating conditions, avoids ineffective control cycles, reduces maintenance costs, and ensures smooth execution of the shifting process.

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Abstract

本发明公开了一种中间轴制动器自适应控制方法,涉及自动变速器控制技术领域。该方法在存在开启请求时,获取目标充气时间控制进气电磁阀充气;获取请求持续时间并判断是否大于二次补气判定阈值,若大于,获取二次补气目标充气时间并与目标充气时间累加,控制进气电磁阀再次补气;若不大于,转入排气阶段;排气完成后判断是否达到进挡转速差,若未达到且满足开启条件,校验开启次数;小于3次时返回执行充气操作,大于或等于3次时,跃迁执行获取二次补气目标充气时间的步骤。本发明构建防死锁逻辑,利用时间阈值识别受阻状态并触发自适应补气,自动克服内部异常阻力,避免制动器陷入无效的点动循环,保证换挡平稳完成。
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