基于坡度修正的电驱混合动力拖拉机换挡规律研究

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中图分类号：S219.4 文献标识码：A 文章编号：2095-5553（2026）03-0185-08

DOI：10.13733/j.jcam.issn.2095-5553.2026.03.025

Abstract：Inorder tosolve the problem of cyclic shiftunder therampconditionofhybrid tractor，takinga two-speed electricdrive transmisionsystemastheresearchobject，theoptimizationmethodoftheshiftruleof thetandemhybrid tractorsuitable forrampdriving wasstudied.Onthebasis of thetwo-parameteroptimal dynamicshiftrule，athree parameter shiftrulebasedonslope was formulated，andanextended Kalman filter model（EKF）was established，the extended Kalman filterprinciplewasused to identifytheroadslope，andthereal-timecorrectionoftheshiftruleunder the slopecondition Wasrealizedacording totheslopevalueidentifiedbytheEKF.Finall，the MATLAB/Simulink simulation platform wasused to simulateandcomparetheshiftrules withand withoutrampsunder diferentrampconditions. Theresultsshow thatunder different slopeconditions，themodifiedshifting paterncan significantlyreduce thenumber of shifts for the tractor，eliminate the shift cycle phenomenon，and within the 250 s simulation period，at a 14% slope and （204号 50% throtle opening，the number of shifts decreased from 12 times to O times；at a 14% slope and 100% throttle opening， the number of shifts decreased from1l times to1 time；at a 20% slope，the number of shifts decreased from lO times to O times；at a 32% slope，the number of shifts decreased from 12 times to O times.The tractor can accelerate smoothly and effectively improve its driving performance.

Keywords： hybrid electric tractor;electric drive transmission system；gear shift regularity;slope recognition

0 引言

拖拉机的主流动力传动系统，然而，这两种动力传动系统结构与换挡控制复杂，制造难度大，相关核心技术被国外企业垄断，严重制约国产大马力拖拉机产品的升级动力换挡、液压无级变速传动系统仍是当前大功率换代。（剩余10753字）