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基于直接驅(qū)動和自增力技術(shù)的AMT換擋系統(tǒng)
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國家自然科學(xué)基金資助項目(51306090)


AMT Shift System Based on Direct-drive and Self-energizing Technology
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    摘要:

    為進一步提高電控機械式自動變速器(AMT)的換擋品質(zhì)和系統(tǒng)魯棒性,,提出一種應(yīng)用直驅(qū)自增力換擋系統(tǒng)的AMT方案,。設(shè)計了直接驅(qū)動裝置的結(jié)構(gòu)并對其性能進行測試,針對直接驅(qū)動技術(shù)存在的問題,研究一種具有自增力和提高換擋系統(tǒng)魯棒性功能的增力式同步器,,參考實車的相關(guān)參數(shù),,研制了直驅(qū)自增力換擋系統(tǒng)的原理性樣機,,完成了技術(shù)方案可行性與功能性的試驗研究,。結(jié)果表明,追求的換擋品質(zhì)相同時,,直驅(qū)自增力換擋系統(tǒng)同步階段需要驅(qū)動裝置提供的最大瞬時驅(qū)動力較小,,降低了換擋過程中的能量損耗;當(dāng)增力斜面角θ=116°時,,增力式同步器的力放大系數(shù)nF約為1.54,,實現(xiàn)了換擋系統(tǒng)放大驅(qū)動裝置輸出力和提高換擋系統(tǒng)魯棒性的功能,為縮小驅(qū)動裝置體積和降低換擋控制系統(tǒng)設(shè)計難度奠定了良好的技術(shù)基礎(chǔ),。

    Abstract:

    In order to further improve shifting quality and system robustness of automated manual transmission (AMT), an AMT system program based on direct-drive and self-energizing shifting system is given. These technical measures can improve the compactness of the system and the shift quality of AMT, at the same time, the shifting energy loss happening in the process of gear switching is reduced greatly. The key technologies of shift system based on direct-drive technology are researched by theoretical analysis, simulation and experiment in this thesis. The structure of direct-drive device is designed, and then, the performance tests have been completed. To solve the inherent problems of direct-drive technology, a servo synchronizer with the function of self-energizing and improving the shifting system robustness is studied. The principle prototype of self-energizing shifting system is developed reference to real vehicle parameters. The universal test bench for AMT shift system based on 2-DOF EMA has been constructed. The feasibility, functionality and versatility of AMT shift system based on direct drive technology are verified in the last. The results show that the maximum instantaneous force provided by self-energizing shifting system is smaller than traditional shifting system in the same shifting quality, and the shifting energy loss can be reduced greatly. The force amplification coefficient nF is nearly 1.54 when the energizing bevel angle θis equal to 116°. For the direct-drive automated mechanical transmission, the upshift time is controlled in nearly 150ms and the synchronization time is controlled at 105ms when the rotary speed difference is 500r/min, the moment of inertia is 0.04kg·m2 and the maximum instantaneous force reaches 770N. At this moment, the maximum instantaneous force provided by shift driving device of direct-drive and self-energizing shift system is 500N, it has been reduced nearly 35%. Thus, the functions of amplifying force output by driving device and improving the shifting system robustness are implemented. It has laid a good technical foundation for decreasing the volume of driving device and reducing the difficulty of shifting control system design.

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葛文慶,李 波,趙彥峻,劉澤硯.基于直接驅(qū)動和自增力技術(shù)的AMT換擋系統(tǒng)[J].農(nóng)業(yè)機械學(xué)報,2014,45(9):1-7. Ge Wenqing, Li Bo, Zhao Yanjun, Liu Zeyan. AMT Shift System Based on Direct-drive and Self-energizing Technology[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(9):1-7.

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  • 收稿日期:2014-04-11
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  • 在線發(fā)布日期: 2014-09-10
  • 出版日期: 2014-09-10
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