Optimizing the mode switching quality of hybrid tractors equipped with mechanical-hydraulic compound transmission devices

Optimizing the mode switching quality of hybrid tractors equipped with mechanical-hydraulic compound transmission devices | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Optimizing the mode switching quality of hybrid tractors equipped with mechanical-hydraulic compound transmission devices Zhen Zhu, Jie Sheng, Hongwei Zhang, Dehai Wang, Long Chen This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4325229/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract During the mode switching process of a hybrid tractor equipped with a mechanical-hydraulic compound transmission (HMCVT) device, the separation and combination of the clutch will cause transient shocks, affecting the smoothness and driving comfort of the entire vehicle. This article establishes a system dynamics model in SimulationX simulation software and builds a hardware-in-the-loop (HIL) test platform for testing to study the simulation and testing when switching from pure electric drive mode to hybrid speed coupling mode. In order to solve the problem of slow dynamic response of the engine, this study proposes a control strategy of "clutch oil pressure fuzzy control + motor torque compensation” and uses the orthogonal test range analysis method and variance analysis method to optimize the vehicle mode switching quality. Taking the switching timing of the six clutches C0, C2, C3, C4, C6 and C7 involved in this article as the factors A, B, C, D, E and F of the orthogonal test range analysis, the clutch switches 0.5s ahead of time. On-time switching and delayed switching of 0.5s are used as three levels. L27(36) orthogonal table is selected for simulation test. Range method analysis shows that scheme A3B1C3D3E1F2 is the optimal switching scheme, that is, clutches C2 and C6 switch 0.5s in advance, and clutch C7 is on time. Switching, clutches C0, C3 and C4 are switched with a delay of 0.5s, the output shaft speed drop is reduced from 21.875% to 1.63%, the dynamic load coefficient is reduced from 8.473 to 2.72, and the impact degree is reduced from 26.181m/s3 to 7.08m/ s3, the switching time is reduced from 1.345s to 0.35s. A hardware-in-the-loop test platform was built for testing. The hardware-in-the-loop (HIL) test results were consistent with the overall trend of the simulation results, verifying the effectiveness of the proposed control strategy and method. Physical sciences/Engineering/Mechanical engineering Physical sciences/Mathematics and computing/Statistics Hybrid tractor mechanical-hydraulic composite transmission orthogonal test SimulationX mode switching Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4325229","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":298041830,"identity":"2d6eaa36-1f54-46c5-9510-4db13891944a","order_by":0,"name":"Zhen Zhu","email":"","orcid":"","institution":"Jiangsu University","correspondingAuthor":false,"prefix":"","firstName":"Zhen","middleName":"","lastName":"Zhu","suffix":""},{"id":298041833,"identity":"5a13f035-5fcb-432f-9473-918d5a4c02e5","order_by":1,"name":"Jie Sheng","email":"","orcid":"","institution":"Jiangsu University","correspondingAuthor":false,"prefix":"","firstName":"Jie","middleName":"","lastName":"Sheng","suffix":""},{"id":298041836,"identity":"381ea2ab-6614-46a3-ae4b-8eb7f0221f5c","order_by":2,"name":"Hongwei Zhang","email":"","orcid":"","institution":"National Key Laboratory of Special Vehicle Design and Manufacturing Integration Technology","correspondingAuthor":false,"prefix":"","firstName":"Hongwei","middleName":"","lastName":"Zhang","suffix":""},{"id":298041838,"identity":"fa5edaed-f404-4ed9-9f2a-bfa24887e282","order_by":3,"name":"Dehai Wang","email":"","orcid":"","institution":"Zhejiang University","correspondingAuthor":false,"prefix":"","firstName":"Dehai","middleName":"","lastName":"Wang","suffix":""},{"id":298041840,"identity":"5eab1c85-a5ab-4b3d-94ea-dd0c19a70fe2","order_by":4,"name":"Long Chen","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA1UlEQVRIiWNgGAWjYBACPhDB2AAmGx8kVNgQ1sKGpKXZ4MGZNJK0MLBJPmw7RIQW9t7DL37usMmTbz/cVpHAdoCBv707Ab8WnnNplr1n0ooNziS23UjgucMgcebsBvxaJHLMjBnbDidukGAEapF4xmAgkUuUlv+J82cwthUkGBwmSovxY8a2A4kNNxjbGBISiNHCc8aMsbctOXHDmcRmiYQDaTwE/cLP3mP84WebXeL89uMPP/78ZyPH396LXwvYbcg8HkLKQYD5AzGqRsEoGAWjYAQDACCaSnYwLdPZAAAAAElFTkSuQmCC","orcid":"","institution":"Jiangsu University","correspondingAuthor":true,"prefix":"","firstName":"Long","middleName":"","lastName":"Chen","suffix":""}],"badges":[],"createdAt":"2024-04-25 15:54:13","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4325229/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4325229/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":56324480,"identity":"c5874c00-4274-47c8-ae1b-3cbc153befd3","added_by":"auto","created_at":"2024-05-12 07:46:50","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":651598,"visible":true,"origin":"","legend":"","description":"","filename":"ManuscriptFile.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4325229/v1_covered_eee294ac-92d4-4513-8f17-349872295c98.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Optimizing the mode switching quality of hybrid tractors equipped with mechanical-hydraulic compound transmission devices","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Hybrid tractor, mechanical-hydraulic composite transmission, orthogonal test, SimulationX, mode switching","lastPublishedDoi":"10.21203/rs.3.rs-4325229/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4325229/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"During the mode switching process of a hybrid tractor equipped with a mechanical-hydraulic compound transmission (HMCVT) device, the separation and combination of the clutch will cause transient shocks, affecting the smoothness and driving comfort of the entire vehicle. This article establishes a system dynamics model in SimulationX simulation software and builds a hardware-in-the-loop (HIL) test platform for testing to study the simulation and testing when switching from pure electric drive mode to hybrid speed coupling mode. In order to solve the problem of slow dynamic response of the engine, this study proposes a control strategy of \"clutch oil pressure fuzzy control + motor torque compensation” and uses the orthogonal test range analysis method and variance analysis method to optimize the vehicle mode switching quality. Taking the switching timing of the six clutches C0, C2, C3, C4, C6 and C7 involved in this article as the factors A, B, C, D, E and F of the orthogonal test range analysis, the clutch switches 0.5s ahead of time. On-time switching and delayed switching of 0.5s are used as three levels. L27(36) orthogonal table is selected for simulation test. Range method analysis shows that scheme A3B1C3D3E1F2 is the optimal switching scheme, that is, clutches C2 and C6 switch 0.5s in advance, and clutch C7 is on time. Switching, clutches C0, C3 and C4 are switched with a delay of 0.5s, the output shaft speed drop is reduced from 21.875% to 1.63%, the dynamic load coefficient is reduced from 8.473 to 2.72, and the impact degree is reduced from 26.181m/s3 to 7.08m/ s3, the switching time is reduced from 1.345s to 0.35s. A hardware-in-the-loop test platform was built for testing. The hardware-in-the-loop (HIL) test results were consistent with the overall trend of the simulation results, verifying the effectiveness of the proposed control strategy and method.","manuscriptTitle":"Optimizing the mode switching quality of hybrid tractors equipped with mechanical-hydraulic compound transmission devices","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-03 05:23:42","doi":"10.21203/rs.3.rs-4325229/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"450ed096-20b8-4e2a-aefc-18ba96ac308c","owner":[],"postedDate":"May 3rd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":31440972,"name":"Physical sciences/Engineering/Mechanical engineering"},{"id":31440973,"name":"Physical sciences/Mathematics and computing/Statistics"}],"tags":[],"updatedAt":"2024-05-12T07:38:43+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-03 05:23:42","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4325229","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4325229","identity":"rs-4325229","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}