TR2022001436T2 - ACTIVE-PASSIVE DUAL MODE TRANSITIONAL VEHICLE SUSPENSION SYSTEM AND RELATED TRANSITION METHOD - Google Patents

ACTIVE-PASSIVE DUAL MODE TRANSITIONAL VEHICLE SUSPENSION SYSTEM AND RELATED TRANSITION METHOD

Info

Publication number
TR2022001436T2
TR2022001436T2 TR2022/001436 TR2022001436T2 TR 2022001436 T2 TR2022001436 T2 TR 2022001436T2 TR 2022/001436 TR2022/001436 TR 2022/001436 TR 2022001436 T2 TR2022001436 T2 TR 2022001436T2
Authority
TR
Turkey
Prior art keywords
valve
oil
suspension
active
passive
Prior art date
Application number
TR2022/001436
Other languages
Turkish (tr)
Inventor
Zhao Dingxuan
Gong Mingde
Liu Shuang
Guo Qinghe
Sun Zhiguo
Ni Tao
Yan Zhaoyang
Zhang Zhuxin
Original Assignee
Yanshan University
Filing date
Publication date
Application filed by Yanshan University filed Critical Yanshan University
Publication of TR2022001436T2 publication Critical patent/TR2022001436T2/en

Links

Abstract

Bir aktif-pasif çift mod geçişli araç süspansiyon sistemi sağlanmıştır. Süspansiyon sistemi bir hidrolik pompası, bir tek yollu valf, bir elektrik kesme tertibatı, bir servo valfi, bir süspansiyon silindiri, bir taşma valfi, bir enerji akümülatörü, bir ters valf, birinci basınç sensörü, ikinci basınç sensörü, bir kontrol elemanı, bir yağ deposu ve bir deplasman sensörü içerir. Mevcut tarifname ayrıca aktif-pasif çift mod geçişli araç süspansiyon sistemi kullanarak bir geçiş yöntemi ile ilgilidir. Aktif ve pasif çift mod geçişli araç süspansiyon sistemi modları arasında geçiş yapıldığında süspansiyon silindirinin rotsuz boşluğundaki yağ basıncı ile enerji akümülatöründeki yağ basıncı önceden eşit olacak şekilde ayarlanır, böylece aktif-pasif süspansiyon sisteminin stabil geçişi gerçekleştirilebilir ve mevcut aktif-pasif süspansiyon sistemi değiştirildiğinde cihaz gövdesinin vibrasyonu ortadan kalkar. İlaveten akümülatör ve taşma valfi aktif ve pasif süspansiyon modunda paylaştırılabilir, böylece akümülatörlerin ve taşma valflerinin kullanım sayısını etkili şekilde azaltır, araç gövdesinin düzen alanında büyük tasarruf sağlar, araç gövdesinin toplam ağırlığını azaltır ve bu da araç şasisinin hafifliği açısından avantajlıdır.An active-passive dual-mode switching vehicle suspension system is provided. The suspension system includes a hydraulic pump, a one-way valve, an electric cut-off device, a servo valve, a suspension cylinder, an overflow valve, an energy accumulator, a reverse valve, a first pressure sensor, a second pressure sensor, a control element, an oil tank and a displacement sensor. The present disclosure also relates to a switching method using an active-passive dual mode switching vehicle suspension system. When switching between active and passive dual-mode switching vehicle suspension system modes, the oil pressure in the rod-free space of the suspension cylinder and the oil pressure in the energy accumulator are pre-set to be equal, so that the stable transition of the active-passive suspension system can be realized and the vibration of the device body when the existing active-passive suspension system is replaced. disappears. In addition, the accumulator and overflow valve can be shared in active and passive suspension mode, thus effectively reducing the number of uses of accumulators and overflow valves, greatly saving the layout space of the vehicle body, reducing the total weight of the vehicle body, which is advantageous in terms of light weight of the vehicle chassis.

Description

TARIFNAME AKTIF-PASIF ÇIFT MOD GEÇISLI ARAÇ SÜSPANSIYON SISTEMI VE ILGILI GEÇIS YÖNTEMI Teknik Alan Mevcut tarifname, bir araç süspansiyonu teknik alaniyla ve özellikle aktif süspansiyon ve pasif süspansiyon seklinde degistirilebilir süspansiyon sistemiyle ve bir geçis yöntemiyle ilgilidir. Geçmis Süspansiyon sistemi bir aracin önemli bir bileseni olup tekerleklerle sasi arasinda kuvveti ve momenti iletme, gövdeye düz olmayan yoldan iletilen etki kuvvetini tamponlama ve sürüs sorunsuzlugu ile aracin çalisma stabilitesini saglamak üzere meydana gelen vibrasyonu azaltma fonksiyonuna sahiptir. Aktif süspansiyon, pasif süspansiyona göre daha iyi vibrasyon sönümleme performansina sahiptir ancak aktif süspansiyonun güvenilirligi pasif süspansiyondan nispeten kötüdür. Aracin yalnizca aktif süspansiyonla donatilmasi halinde bir ariza meydana geldiginde aracin sürüs güvenligi ve manevra kabiliyeti zor saglanir. Dolayisiyla aktif süspansiyon ve pasif süspansiyon bir araç gövdesine entegredir ve sürüs güvenligiyle araç manevra kabiliyetinin sürüs konforu iyilestirilirken garanti edilecegi sekilde degistirilebilir. Teknigin bilinen durumunda bir araç gövdesine entegre edilen aktif süspansiyon sistemi ve pasif süspansiyon sistemi birbiriyle degistirildiginde güçlü vibrasyon sorunu iki sistemin esit olmayan basincina bagli meydana gelecek olup, daha büyük bir potansiyel güvenlik riski mevcuttur. Aktif süspansiyon sisteminin etkili çalismasi, yedek güç kaynagi olarak bir enerji akümülatörü gerektirir ve pasif süspansiyon sisteminin etkili çalismasi bir elastik eleman olarak enerji akümülatörü gerektirir. Teknigin bilinen durumunda aktif süspansiyona yönelik enerji akümülatörü ve pasif süspansiyona yönelik enerji akümülatörü her biri kendi rolünü oynayan iki bagimsiz elemandir. Enerji akümülatörü, diger hidrolik elemanlardan daha büyük bir hacme ve kaliteye sahiptir. Enerji akümülatörünün sayisi büyük oldugunda bu durum araç gövdesinin sinirli yerlesim alanina yönelik yüksek gereksinimleri artirmanin yani sira araç gövdesinin agirligini da artirir, bu da araç hafifligi açisindan arzu edilmez. Yukaridaki teknik sorunlar isiginda mevcut tarifnamenin bir amaci çalisma modlarinin sorunsuz geçisini gerçeklestirebilen ve enerji akümülatörünün iki çalisma modunda tekrar kullanilmasina olanak veren bir aktif-pasif çift mod geçisli araç süspansiyon sistemi ve bir geçis yöntemi saglanmasidir. Öncelikle mevcut tarifname bir filtre, bir hidrolik pompasi, bir tek yönlü valf, bir elektrik kesme, bir servo valfi, bir süspansiyon silindiri, bir tasma valfi, bir birinci basinç sensörü, bir ikinci basinç sensörü, bir kumanda, bir yag deposu ve bir deplasman sensörü içeren bir aktif-pasif çift mod geçisli araç süspansiyon sistemi saglar; Filtrenin yag girisi bir yag borusu yoluyla yag deposuna baglanir, filtrenin yag çikisi bir yag borusu yoluyla hidrolik pompasinin yag girisine baglanir; hidrolik pompasinin yag çikisi bir yag borusu yoluyla tek yönlü valfin bir yag girisine baglanir; tek yönlü valfin bir yag çikisi bir yag borusu araciligiyla servo valfin yag girisine baglanir; servo valfin dönüs portu bir yag borusu araciligiyla yag deposuna baglanir. Hidrolik pompasinin tahrik safti bir mekanik yapi yoluyla elektrik kesme tertibatina baglanir; elektrik kesme tertibati bir araç motorunun çikis gücü saftina baglidir, elektrik kesme tertibati ise araç motorundan güç elde etmek ve gücü hidrolik pompasina iletmek üzere kullanilir. Servo valfi, bir sol pozisyonun, bir orta pozisyonun ve bir sag pozisyonun üç durumunu içeren bir üç pozisyonlu dört yollu elektro-hidrolik servo valfidir; servo valfin birinci çalisan yag portu, süspansiyon silindirinin rotsuz bosluguna baglanir, servo valfin ikinci çalisan yag portu ise süspansiyon silindirinin rot bosluguna baglanir; servo valf orta pozisyondayken yag girisi, servo valfin dönüs portu ve birinci yag portu, servo valfin ikinci çalisma yagi portu arasindaki tüm geçitler kapalidir; servo valfi sol pozisyonda oldugunda, servo valfin yag girisi portu ile servo valfin birinci çalisma yagi portu arasindaki bir geçit açilir ve servo valfin dönüs portu ile servo valfin ikinci çalisma yagi portu arasindaki bir geçit açilir; servo valfi sag pozisyonda oldugunda servo valfin yag giris portu ile servo valfin Ikinci çalisma yagi portu arasindaki bir geçit açilir, servo valfin dönüs portu ile servo valfin birinci çalisma yagi portu arasindaki bir geçit açilir. Süspansiyon silindiri araç gövdesine baglidir, süspansiyon silindiri ise hidrolik silindire bagli bir piston kolunun deplasmanini izlemek üzere deplasman sensörüyle donatilir. Tasma valfinin yag girisi bir yag borusu araciligiyla tek yönlü valfin yag çikisina baglanir ve tasma valfinin bir yag çikisi ise bir yag borusu araciligiyla yag deposuna baglanir, tasma valfinin açma basinci, kontrol elemani tarafindan tasma valfinin kontrol ucuna bir kontrol sinyali gönderilerek ayarlanir. Oransal tasma valfi bir aktif süspansiyon sistemine iliskin bir emniyet valfi ya da pasif süspansiyon sistemine iliskin bir emniyet valfi olarak kullanilabilir. Ters valf ile servo valfi paralel sekilde düzenlenir, ters valfin yag girisi bir yag borusu araciligiyla yag deposuna baglanir, ters valfin dönüs portu bir yag borusu araciligiyla tasma valfinin yag girisine baglanir; ters valfin birinci çalisan yag portu bir yag borusu araciligiyla süspansiyon silindirinin rot bosluguna baglanir, ters valfin ikinci çalisan yag portu ise bir yag borusu araciligiyla süspansiyon silindirinin rotsuz bosluguna baglanir. Enerji akümülatörü ters valfin dönüs portu ile tasma valfinin yag girisi arasinda bir yag yolunda düzenlenir. Enerji akümülatörü, aktif süspansiyon sistemine yönelik bir yedek güç kaynagi olarak ya da pasif süspansiyon sisteminin elastik elemani olarak kullanilabilir. Birinci basinç sensörü, enerji akümülatöründeki yag basincini tespit etmek üzere enerji akümülatörü ile ters valf arasinda bir yag yolunda saglanir; ikinci basinç sensörü süspansiyon silindirinin rotsuz boslugunda bir yag basincinin tespit edilmesi için süspansiyon silindirinin rotsuz boslugu ile servo valfin birinci çalisan yag portu arasinda bir yag yolunda saglanir. Elektrik kesme tertibatinin kontrol ucu, servo valfin kontrol ucu, tasma valfinin kontrol ucu ve ters valfin kontrol ucu kontrol elemanina bagli olup, bu bilesenlerin sinyalleri kontrol elemani tarafindan verilir. Servo valf, sol pozisyonun, orta pozisyonun ve sag pozisyonun üç durumunu içeren üç pozisyonlu dört yollu bir elektro-hidrolik servo valftir; servo valf, orta pozisyonda oldugunda yag girisi arasindaki tüm geçitler, servo valfin dönüs portlari ve birinci çalisan yag portu, servo valfin ikinci çalisan yag portu arasindaki tüm geçitler kapatilir, servo valf sol pozisyonda oldugunda Servo valfin yag giris portu ile servo valfin birinci çalisan yag girisi arasindaki geçit açilir ve servo valfin yag dönüs portu ile servo valfin ikinci çalisan yag portu arasindaki geçit açilir, bu durumda yag, servo valfin yag giris portu ve servo valfin birinci çalisan yag portu üzerinden süspansiyon silindirinin rotsuz bosluguna girebilir ve ayni zamanda süspansiyon silindirinin rot boslugundaki yag, servo valfin ikinci çalisan yag portu ve servo valfin yag dönüs portu üzerinden yag deposuna geri akabilir; servo valf sag pozisyonda oldugunda servo valfin yag giris portu ile serv valfin ikinci çalisan yag portu arasindaki geçit açilir ve servo valfin yag dönüs portu ile servo valfin birinci çalisan yag portu arasindaki geçit açilir, bu sefer yag, süspansiyon silindirinin rot bosluguna servo valfin yag giris boslugu ve servo valfin ikinci çalisan yag portu üzerinden girebilir, ayni zamanda süspansiyon silindirinin rotsuz boslugundaki yag servo valfin birinci çalisan yag portu ve yag dönüs portu araciligiyla yag tankina geri akabilir. Mevcut bulusun tercih edilen bir uygulamasinda tasma valfi bir oransal tasma valfidir. Mevcut bulusun tercih edilen bir uygulamasina göre ters valf açma ve kapatma seklinde iki durum içeren bir iki pozisyonlu dört yollu elektromanyetik ters valftir. Ters valf kapali durumdayken yag girisi ile ters valfin dönüs portu ve ters valfin birinci çalisan yag portu ile ikinci çalisan yag portu arasindaki tüm geçitler kapalidir; ters valf açik durumdayken ters valfin yag girisi ve ters valfin birinci çalisan yag portu arasindaki geçit ve ters valfin dönüs portu ve ters valfin ikinci çalisan yag portu arasindaki bir geçit açiktir. Süspansiyon silindirinin rotsuz boslugundaki yag ters valfin ikinci çalisan yag portu ve ters valfin dönüs portu araciligiyla enerji akümülatörüne akabilir, yag deposundaki yag ise ters valfin yag girisi ve ters valfin birinci çalisan yag portu üzerinden süspansiyon silindirinin rot bosluguna akabilir. Bu durumun aksine, enerji akümülatöründeki yag da ters valfin dönüs portu ve ters valfin ikinci çalisan yag portu araciligiyla süspansiyon silindirinin rotsuz bosluguna akabilir, süspansiyon silindirinin rot boslugundaki yag ise ters valfin birinci çalisan yag boslugu ve ters valfin yag girisi araciligiyla yag deposuna geri akabilir. Ikinci olarak mevcut tarifname aktif-pasif çift mod geçisli araç süspansiyon sistemi kullanarak bir geçis yöntemi saglar. Süspansiyon sistemi aktif süspansiyon modunda oldugunda, ters valf kapanma durumundadir ve bu sefer tasma valfinin açilma basinci aktif süspansiyon sisteminin güvenli isletimine yönelik kullanilan maksimum basinçtir pa. Elektrik kesme tertibati araç motorunun güç çikisina bagli olup, hidrolik pompasinin çalismasini tahrik etmek üzere hidrolik pompasina güç verir. Kontrol elemani, çalismayi düzenlemek üzere sürüs kosuluna ve araç gövdesinin durumuna göre servo valfinin kontrol ucuna ilgili kontrol sinyalini gönderir. Bu durumda enerji akümülatörü aktif süspansiyon sisteminin yedek güç kaynagi olarak kullanilir ve tasma valfi, aktif süspansiyon sisteminin emniyet valfi olarak kullanilir. Süspansiyon sistemi pasif süspansiyon modunda oldugunda, ters valf açilma durumundadir ve bu sefer tasma valfinin açilma basinci pasif süspansiyon sisteminin güvenli isletimine yönelik kullanilan maksimum basinçtir ps. Elektrik kesme tertibatinin araç motorunun güç çikisi safti baglantisi kesilir ve hidrolik pompasi çalismayi durdurur. Servo valf orta pozisyonda oldugunda enerji akümülatörü pasif süspansiyon sisteminin elastik elemani olarak kullanilirken tasma valfi, pasif süspansiyon sisteminin emniyet valfi olarak kullanilir. Yöntem asagidaki asamalari içerir: A1. Araç park halindeyken ve aktif süspansiyon pasif süspansiyona geçtiginde, kontrol elemani, deplasman sensörünün geri besleme sinyaline göre servo valfin kontrol ucuna ilgili deplasman komutunu gönderir; servo valf, silindirin piston kolunun tam piston strokunun orta pozisyonuna hareketini düzenler ve ardindan kontrol elemani sinyalin servo valfe gönderilmesini durdurur; servo valf orta pozisyon durumuna döner, yag süspansiyon silindirinde kilitlenir; kontrol elemani, elektrik kesme tertibatina sinyalleri göndermeyi durdurur, elektrik kesme tertibatinin araç motorunun elektrik kesme safti baglantisi kesilir, hidrolik pompasi çalismayi durdurur, bu durumda, birinci basinç sensörü enerji akümülatöründeki basinç degerinin pioldugunu tespit eder ve enerji akümülatöründeki basinç degeri sinyali kontrol elemanina aktarilir, ikinci basinç sensörü, süspansiyon silindirinin rotsuz boslugundaki basinç degerinin pzoldugunu tespit eder ve ardindan süspansiyon silindirinin rotsuz boslugunda basinç degerinin sinyali kontrol elemanina aktarilir; kontrol elemani p1 ve pzbasinç degerlerini karsilastirir ve spesifik olarak asagidaki ayarlamalari yapar: (1). P1=p2 ise kontrol elemani, ters valfin kontrol ucuna bir kontrol sinyali gönderir, ters valfin kapali durumdan açik duruma geçmesini ayarlar; süspansiyon silindirinin rotsuz boslugu ve enerji akümülatörü arasindaki yag yolu açilir; Süspansiyon silindirinin rot boslugu ve yag boslugu arasindaki yag yolu açilir; kontrol elemani, açma basincini ps olarak ayarlamak üzere tasma valfinin kontrol ucuna bir kontrol sinyali gönderir; p1, p2'ye esit oldugundan ters valf açildiginda basinç farki mevcut degildir ve aktif süspansiyon pasif süspansiyona sorunsuz çevrilir; bu sefer enerji akümülatörü pasif süspansiyonun bir elastik elemani olarak kullanilir ve tasma valfi pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu sefer araç harekete baslar, yani pasif süspansiyon modunda hareket eder; (2). P1p2 ise kontrol elemani, tasma valfinin kontrol ucuna bir kontrol sinyali gönderir, tasma valfinin açma basincinipzolarak ayarlar ve yag, tasma valfi araciligiyla enerji akümülatöründen yag deposuna geri akar; Birinci basinç sensörü, enerji akümülatörü basincinin pgdegerine azaldigini izlediginde, kontrol elemani, açma basincini psolarak ayarlamak üzere kontrol sinyalini tasma valfinin kontrol ucuna gönderir; ardindan kontrol elemani ters valfin kapali durumdan açik duruma çevrilmesi için ters valfin kontrol ucuna bir kontrol sinyali gönderir; bu durumda p1=p2 seklindedir, aktif süspansiyon pasif süspansiyona sorunsuz çevrilir, enerji akümülatörü pasif süspansiyonun elastik elemani olarak kullanilir, tasma valfi pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu durumda araç harekete baslar, yani pasif süspansiyon modunda hareket eder; (3). P2p1 ise, kontrol elemani, elektrik kesme tertibatina bir kontrol sinyali gönderir ve elektrik kesme tertibati, araç motorunun çikis safina tekrar baglanir ve buradan güç elde ederek gücü hidrolik pompaya aktarir, hidrolik pompa çalisir, yag tek yollu valften enerji akümülatörüne akar, enerji akümülatöründeki yag basinci artar; birinci basinç sensörüyle izlenen basinç p2degerine yükseldiginde, kontrol elemani, elektrik kesme tertibatina kontrol sinyali göndermeyi durdurur; elektrik kesme tertibati, araç motorunun çikis saftindan ayrilir; hidrolik pompasi çalismayi durdurur, ardindan kontrol elemani, ters valfin kontrol ucuna bir kontrol sinyali gönderir, ters valfi kapali durumdan açik duruma geçirir; bu sefer p1=p2 seklindedir, aktif süspansiyon, sorunsuz sekilde pasif süspansiyona çevrilir, enerji akümülatörü, pasif süspansiyonun elastik elemani olarak kullanilir ve tasma valfi, pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu sefer, araç hareket etmeye baglar yani pasif süspansiyon modunda hareket eder; ve A2. Araç park halindeyken ve pasif süspansiyon aktif süspansiyona geçtiginde kontrol elemani, sinyali önce ters valfe göndermeyi durdurur; ters valf açik durumdan kapali duruma geçer, yag süspansiyon silindirinde kilitlenir ve müteakiben kontrol elemani, açma basincini pEl degerine ayarlamak üzere tasma valfine kontrol sinyali gönderir ve ardindan kontrol elemani elektrik kesme tertibatina bir kontrol sinyali gönderir; elektrik kesme tertibati, araç motorunun çikis saftina baglidir ve buradan gücü alarak gücü hidrolik pompasina gönderir, hidrolik pompasi çalisir, kontrol elemani, ilgili deplasman komutunu deplasman sensörünün geri besleme sinyaline göre servo valfin kontrol ucuna gönderir; servo valfi süspansiyon silindirinin piston kolunun hareketini tam strok orta pozisyonuna düzenledikteri sonra, kontrol elemani kontrol sinyalini servo valfin kontrol ucuna göndermeyi durdurur ve servo valf, orta pozisyon durumuna geri döner; bu amaçla pasif süspansiyon, aktif süspansiyon durumuna sorunsuz sekilde dönüstürülür; araç hareket etmeye baslar, kontrol elemani ilgili deplasman sinyalini sürüs durumuna ve araç gövdesi durumuna göre ilgili isletimi düzenlemek üzere servo valfin kontrol ucuna gönderir; bu sefer enerji akümülatörü, aktif süspansiyonun bir yedek güç elemani olarak kullanilir ve tasma valfi ise aktif süspansiyon sisteminin emniyet valfi olarak kullanilir; araç, hareket etmeye baslar yani aktif süspansiyon modunda hareket eder. Önceki teknige kiyasla mevcut tarifnamenin faydali sonuçlari asagidaki gibidir: aktif ve pasif çift mod geçisli araç süspansiyon sistemi modlari arasinda geçis yapildiginda süspansiyon silindirinin rotsuz boslugundaki yag basinci ile enerji akümülatöründeki yag basinci önceden esit olacak sekilde ayarlanir, böylece aktif- pasif süspansiyon sisteminin stabil geçisi gerçeklestirilebilir ve mevcut aktif-pasif süspansiyon sistemi degistirildiginde cihaz gövdesinin vibrasyonu ortadan kalkar; mevcut tarifnameye göre aktif-pasif çift mod geçisli araç süspansiyon sisteminde enerji akümülatörü aktif süspansiyon modunda bir yedek güç kaynagi olarak ya da pasif süspansiyon modunda bir elastik eleman olarak kullanilabilir ve tasma valfi aktif süspansiyon modunda bir emniyet valfi olarak ve ayrica pasif süspansiyon modunda emniyet valfi olarak kullanilabilir, enerji akümülatörünün ve tasma valfinin kullanim sayisi etkili sekilde azalir, böylece araç gövdesinde büyük bir tasarruf saglanir, ve özellikle çesitli enstrümanlar ile ekipmanla yüklenmesi gereken acil durum kurtarma araçlarina yönelik olarak mevcut tarifnameye göre süspansiyon sistemi araç gövdesi üzerinde baska enstrüman ve ekipmana yönelik daha fazla montaj alani açabilir ve araç gövdesinin toplam kütlesini etkili sekilde azaltabilir, dolayisiyla araç sasisinin hafifligi açisindan avantajlidir. Çizimlerin Kisa Açiklamasi Sekil 1, mevcut tarifnameye göre bir aktif-pasif çift mod geçisli araç süspansiyon sisteminin sematik görünümüdür. Çizimlerde 1-filtre, 2-hidrolik pompasi, 3-tek yollu valf, 4-elektrik kesme tertibati, 5-araç motoru, B-servo valf, T-süspansiyon silindiri, 8-araç gövdesi, 9-tasma valfi, 10-enerji akümülatörü, 'll-ters valf, 12-birinci basinç sensörü, 13-ikinci basinç sensörü, 14- kontrol elemani, 15-yag deposu, 16-deplasman sensörü, Pi-servo valf yag girisi, T1- servo valf dönüs portu, Ai-servo valf birinci çalisan yag portu, B1-servo valf ikinci çalisan yag portu, P2-ters valf yag girisi , T2-ters valf dönüs portu, A2-ters valf birinci çalisan yag portu, Bz-ters valf ikinci çalisan yag portudur. Detayli Açiklama Mevcut bulusa göre uygulamalarin asagidaki detayli açiklamasi mevcut tarifnamenin kapsamini kisitlamak yerine ekli çizimlerle birlikte saglanmistir. Mevcut tarifnamenin açiklamasinda "ön", "arka", "sol", "merkez", "sag", "üst", "ait" ve benzeri terimlerin çizimlerde gösterilenlere dayali yönleri veya pozisyon iliskilerini belirttigi ve yalnizca mevcut tarifnamenin tanimlanmasi ve tarifnamenin sadelestirilmesi açisindan kolaylik sundugu ancak atifta bulunulan cihazin veya elemanin spesifik yönlendirmede olmasinin, spesifik bir yönde yapilmasini ve çalistirilmasini belirtmedigi veya ima etmediginin, dolayisiyla mevcut tarifnameyi sinirlandirici olarak yorumlanamayacagi anlasilacaktir. "Birinci", "ikinci" veya benzeri terimler yalnizca ilgili nesnelerin benzer nesnelerden ayirt edilmesine yönelik yazili tarifnamenin sadelestirilmesi için kullanilmakta olup, özel siralar arasinda sirali bir iliskiyi belirttigi seklinde yorumlanmayacaktir. Bu basvuruda aksi açikça belirtilmedikçe veya herhangi bir sinirlandirma olmadikça, olup, örnegin sabi baglantilar, çikarilabilir baglantilar veya tümlesik baglantilari içerebilir; mekanik veya elektrikle baglanabilir; müdahale eden ortam yoluyla dogrudan veya dolayli olarak baglanabilir ya da iki eleman arasina baglanabilir. Mevcut basvuruda yukaridaki terimlerin spesifik anlami teknikte standart beceriye sahip uzmanlar tarafindan uygun sekilde anlasilabilir. Sekil 1'de gösterildigi üzere mevcut tarifnamenin uygulamasinda belirtilen aktif-pasif çift mod geçisli araç süspansiyon sistemi bir filtre (1), bir hidrolik pompasi (2), bir tek yollu valf (3), bir elektrik kesme tertibati (4), bir servo valf (6), bir süspansiyon silindiri (7), bir tasma valfi (9), bir enerji akümülatörü (10), bir ters valf (11), bir birinci basinç sensörü (12), bir ikinci basinç sensörü (13), bir kontrol elemani (14), bir yag deposu (15) ve bir deplasman sensörü (16) içerir. Filtrenin (1) bir yag girisi, bir yag borusu araciligiyla yag deposuna (15) baglanir, filtrenin (1) yag çikisi bir yag borusu araciligiyla hidrolik pompasinin (2) yag girisine baglanir, hidrolik pompasinin (2) yag çikisi, yag borusu araciligiyla tek yollu valfin (3) yag girisine baglanir, tek yollu valfin (3) yag çikisi bir yag borusu araciligiyla servo valfin yag girisine (P1) baglanir, servo valfin dönüs portu (T1) ise bir yag borusu araciligiyla yag deposuna (15) baglanir. Hidrolik pompasinin (2) bir tahrik safti, bir mekanik yapi üzerinden elektrik kesme tertibatina (4) baglanir, elektrik kesme tertibati (4) ise araç motorunun (5) güç çikis saftina baglanir. Elektrik kesme tertibati (4), araç motorundan (5) enerji elde etmek ve enerjiyi hidrolik pompasina (2) aktarmak üzere kullanilir. Servo valfin birinci çalisan yag portu (A1) süspansiyon silindirinin (7) rotsuz bosluguna baglanir ve servo valfin ikinci çalisan yag portu (B1) süspansiyon silindirinin rot bosluguna baglanir. Süspansiyon silindiri (7), araç gövdesine (8) baglidir ve süspansiyon silindiri (7), bir hidrolik silindire bagli piston kolunun degisimini izlemek üzere deplasman sensörüyle (16) donatilir. Tasma valfinin (9) yag girisi, tek yollu valfin (3) yag çikisina bir yag borusu yoluyla baglidir, tasma valfinin (9) yag çikisi ise bir yag borusu araciligiyla yag deposuna (15) baglidir. Ters valf (11) ile servo valf (6) paralel düzenlenir, ters valfin yag girisi (Pz) bir yag borusu araciligiyla yag deposuna (15) baglanir; ters valfin dönüs portu (T2) ise bir yag borusu yoluyla tasma valfinin (9) yag girisine baglanir. Ters valfin birinci çalisan yag portu (A2) bir yag borusu araciligiyla süspansiyon silindirinin (7) rot bosluguna baglanir ve ters valfin ikinci çalisan yag portu (82) bir yag borusu araciligiyla süspansiyon silindirinin (7) rotsuz bosluguna baglanir. Enerji akümülatörü (10) ters valfin dönüs portu (T2) ile tasma valfinin (9) yag girisi arasinda bir yag yolunda düzenlenir. Enerji akümülatörü (10), aktif süspansiyon sistemine yönelik bir yedek güç kaynagi olarak ya da pasif süspansiyon sisteminin elastik elemani olarak kullanilabilir. Birinci basinç sensörü (12), enerji akümülatörü (10) ile ters valfin dönüs portu (T2) arasinda enerji akümülatöründeki (10) yag basincini tespit etmeye yönelik bir yag yoluyla donatilir. Ikinci basinç sensörü (13), süspansiyon silindirinin (7) ve servo valfinin birinci çalisan yag portunun (A1) rotsuz boslugu arasinda süspansiyon silindirinin (7) rotsuz boslugundaki yag basincinin tespitine yönelik bir yag yoluyla Elektrik kesme tertibatinin (4) kontrol ucu, servo valfin (6) kontrol ucu, tasma valfinin (9) kontrol ucu ve ters valfin (11) kontrol ucu kontrol elemanina (14) bagli olup, bu bilesenlerin sinyalleri kontrol elemani (14) tarafindan verilir. Servo valf (6) sol pozisyon, orta pozisyon ve sag pozisyon seklinde üç durumu içeren üç pozisyonlu dört yollu bir elektro-hidrolik servo vall'tir; servo valf (6) orta pozisyonda oldugunda yag girisi (Pi) ve servo valfin dönüs portu (Ti) ile servo valfin birinci çalisan yag portu (A1) ve ikinci çalisan yag portu (B1) arasindaki tüm geçitler kapatilir; servo valf (6) sol pozisyonda oldugunda, servo valfin yag girisi (Pi) ve servo valfin birinci çalisan yag portu (A1) arasindaki geçit açilir ve servo valfin dönüs portu (T1) ile servo valfin ikinci çalisan yag portu (B1) arasindaki geçit açilir, bu sefer yag, servo valfin yag girisi (P1) ve servo valfin birinci çalisan yag portu (A1) yoluyla süspansiyon silindirinin (7) rotsuz bosluguna akabilir, ayni zamanda, süspansiyon silindirinin (7) rot boslugundaki yag, servo valfin ikinci çalisan yag portu (81) ve servo valfin dönüs portu (T1) üzerinden yag deposuna (15) geri akabilir; servo valf (6) sol pozisyonda oldugunda, servo valfin yag girisi (Pi) ve servo valfin ikinci çalisan yag portu (81) arasindaki geçit açilir ve servo valfin dönüs portu (Ti) ile servo valfin birinci çalisan yag portu (A1) arasindaki geçit açilir, bu sefer yag, servo valfin yag girisi (Pi) ve servo valfin ikinci çalisan yag portu (Bi) yoluyla süspansiyon silindirinin (7) rotsuz bosluguna akabilir, ayni zamanda, süspansiyon silindirinin (7) rotsuz boslugundaki yag, servo valfin birinci çalisan yag portu (A1) ve servo valfin dönüs portu (T1) üzerinden yag deposuna (15) geri akabilir. Tasma valfi (9) bir oransal tasma valfidir. Tasma valfinin (9) açma basinci kontrol elemani (14) tarafindan tasma valfinin (9) kontrol ucuna bir kontrol sinyali aktarmak üzere ayarlanabilir. Tasma valfi (9) aktif süspansiyon sistemine yönelik bir emniyet valfi olarak kullanilabilir veya pasif süspansiyon sistemine yönelik bir emniyet valfi olarak kullanilabilir. Ters valf (11) kapatma ve açma seklinde iki durumu içeren iki pozisyonlu elektromanyetik ters valftir. Ters valf (11) kapanma durumunda oldugunda, ters valfin yag girisi (P2) ile dönüs portu (T2) ve ters valfin birinci çalisan yag portu (A2) ile ikinci çalisan yag portu (B2) arasindaki tüm geçitler kapatilir; ters valf (11) açik durumda oldugunda ters valfin yag girisi (P2) ile ters valfin birinci çalisan yag portu (A2) arasindaki bir geçit ve ters valfin dönüs portu (T2) ile ters valfin ikinci çalisan yag portu (82) arasindaki geçidin ikisi de açiktir; Süspansiyon silindirinin (7) rotsuz boslugundaki yag ters valfin ikinci çalisan yag portu (82) ve ters valfin dönüs portu (T2) araciligiyla enerji akümülatörüne (10) akabilir, yag deposundaki (15) yag ise ters valfin yag girisi (Pz) ve ters valfin birinci çalisan yag portu (A2) üzerinden süspansiyon silindirinin (7) rot bosluguna akabilir. Bu durumun aksine, enerji akümülatöründeki (10) yag da ters valfin dönüs portu (T2) ve ters valfin ikinci çalisan yag portu (82) araciligiyla süspansiyon silindirinin (7) rotsuz bosluguna akabilir. süspansiyon silindirinin (7) rot boslugundaki yag ise ters valfin birinci çalisan yag boslugu (A2) ve ters valfin yag girisi (Pz) araciligiyla yag deposuna (15) geri akabilir. Mevcut tarifnameye göre aktif-pasif çift mod geçisli araç süspansiyon sisteminde ilgili sistem aktif süspansiyon modunda çalistiginda çalisan kisimlar filtre (2), hidrolik pompasi (2), tek yollu valf (3), elektrik kesme tertibati (4), servo valf (6), süspansiyon silindiri (7), tasma valfi (9), enerji akümülatörü (10), kontrol elemani (14), yag deposu (15) ve deplasman sensörü (16) içerir. Sistem pasif süspansiyon modunda çalisirken çalisan kisimlar süspansiyon silindiri (7), tasma valfi (9), enerji akümülatörü (10), ters valf (11) ve yag deposu (15) içerir. Aktif süspansiyon modunda elektrik kesme tertibati (4) bir sinyal alir ve hidrolik pompanin (2) çalismasini tahrik etmek üzere araç motorunun (5) güç çikisi saftina sürekli baglanir. Servo valfin (6) kontrol ucu kontrol elemani (14) tarafindan iletilen kontrol sinyalini alir ve çalismayi sürdürür. Tasma valfi (9) pa degerinde açma basincini muhafaza eder (pa aktif süspansiyon sisteminin emniyetli çalismasina yönelik maksimum basinçtir). Bu sefer ters valf (11) sinyal alamaz ve kapali durumda muhafaza edilmeyi sürdürür. Pasif süspansiyon modunda elektrik kesme tertibati (4) sinyal alamaz ve araç motorunun (5) güç çikisi saftindan ayrilmaya devam eder. Servo valf (6) sinyal alamaz ve orta pozisyonda muhafaza edilmeye devam eder. Tasma valfi (9), açma basincinipsdegerinde sürekli muhafaza eder. Ters valf (11) bir sinyal alir ve açik durumda muhafaza eder. Mevcut tarifnameye göre aktif-pasif çift mod geçisli araç süspansiyon sisteminin geçis yöntemi asagidaki gibidir: Süspansiyon sistemi aktif süspansiyon modunda oldugunda, ters valf (11) kapanma durumundadir ve bu sefer tasma valfinin (9) açilma basinci aktif süspansiyon sisteminin güvenli isletimine yönelik kullanilan maksimum basinçtir pa. Elektrik kesme tertibati (4) araç motorunun (5) güç çikisina bagli olup, hidrolik pompasinin (2) çalismasini tahrik etmek üzere hidrolik pompasina (2) güç verir. Kontrol elemani (14), çalismayi düzenlemek üzere sürüs kosuluna ve araç gövdesinin durumuna göre servo valfin (6) kontrol ucuna ilgili kontrol sinyalini gönderir. Bu durumda enerji akümülatörü (10) aktif süspansiyon sisteminin yedek güç kaynagi olarak kullanilir ve tasma valfi (9), aktif süspansiyon sisteminin emniyet valfi olarak kullanilir. Süspansiyon sistemi pasif süspansiyon modunda oldugunda, ters valf (11) açilma durumundadir ve bu sefer tasma valfinin (9) açilma basinci pasif süspansiyon sisteminin güvenli isletimine yönelik kullanilan maksimum basinçtir ps. Elektrik kesme tertibatinin (4) araç motorunun (5) güç çikis safti baglantisi kesilir ve hidrolik pompasi (2) çalismayi durdurur. Servo valf (6) orta pozisyonda oldugunda enerji akümülatörü (10) pasif süspansiyon sisteminin elastik elemani olarak kullanilirken tasma valfi (9), pasif süspansiyon sisteminin emniyet valfi olarak kullanilir. Araç park halindeyken ve aktif süspansiyon pasif süspansiyona geçtiginde, kontrol elemani (14), deplasman sensörünün geri besleme sinyaline göre servo valfin (6) kontrol ucuna ilgili deplasman komutunu gönderir; servo valf (6), süspansiyon silindirinin (7) piston kolunun tam piston strokunun orta pozisyonuna hareketini düzenler ve ardindan kontrol elemani (14) sinyalin servo valfe gönderilmesini durdurur; servo valf (6) orta pozisyon durumuna döner, yag süspansiyon silindirinde (7) kilitlenir; kontrol elemani (14), elektrik kesme tertibatina (4) sinyalleri göndermeyi durdurur, elektrik kesme tertibatinin (4) araç motorunun (5) elektrik kesme safti baglantisi kesilir, hidrolik pompasi (2) çalismayi durdurur, bu durumda, birinci basinç sensörü (12) enerji akümülatöründeki basinç degerinin pioldugunu tespit eder ve basinç degeri sinyali kontrol elemanina (14) aktarilir, ikinci basinç sensörü, süspansiyon silindirinin (7) rotsuz boslugundaki basinç degerinin pzoldugunu tespit eder ve ardindan basinç degerinin sinyali kontrol elemanina (14) aktarilir; kontrol elemani (14) p1 ve pzbasinç degerlerini karsilastirir ve spesifik olarak asagidaki ayarlamalari yapar: (1) p1=p2 ise kontrol elemani (14), ters valfin (11) kontrol ucuna bir kontrol sinyali gönderir, ters valfin (11) kapali durumdan açik duruma geçmesini ayarlar; süspansiyon silindirinin (7) rotsuz boslugu ve enerji akümülatörü (10) arasindaki yag yolu açilir; Süspansiyon silindirinin (7) rot boslugu ve yag deposu (15) arasindaki yag yolu açilir; kontrol elemani (14), açma basincini ps maksimum basinç olarak ayarlamak üzere tasma valfinin (9) kontrol ucuna bir kontrol sinyali gönderir; p1, pz'ye esit oldugundan ters valf (11) açildiginda basinç farki mevcut degildir ve aktif süspansiyon pasif süspansiyona sorunsuz çevrilir; bu sefer enerji akümülatörü (10) pasif süspansiyonun bir elastik elemani olarak kullanilir ve tasma valfi (9) pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu sefer araç harekete baslar, yani pasif süspansiyon modunda hareket eder; (2) P1p2 ise kontrol elemani (14), tasma valfinin (9) kontrol ucuna bir kontrol sinyali gönderir, tasma valfinin (9) açma basincini 20Iarak ayarlar ve yag, tasma valfi (9) araciligiyla enerji akümülatöründen (10) yag deposuna (15) geri akar; Birinci basinç sensörü (12), enerji akümülatörü (10) basincinin pzdegerine azaldigini izlediginde, kontrol elemani (14), açma basincini ps maksimum basinç olarak ayarlamak üzere kontrol sinyalini tasma valfinin (9) kontrol ucuna gönderir; ardindan kontrol elemani (14) ters valfin (11) kapali durumdan açik duruma çevrilmesi için ters valfin kontrol ucuna bir kontrol sinyali gönderir; bu durumda p1=p2 seklindedir, aktif süspansiyon pasif süspansiyona sorunsuz çevrilir, enerji akümülatörü (10) pasif süspansiyonun elastik elemani olarak kullanilir, tasma valfi (9) pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu durumda araç harekete baslar, yani pasif süspansiyon modunda hareket eder; (3) P2p1 ise, kontrol elemani (14), elektrik kesme tertibatina (4) bir kontrol sinyali gönderir ve elektrik kesme tertibati (4), araç motorunun (5) çikis saftina tekrar baglanir ve buradan güç elde ederek gücü hidrolik pompaya (2) aktarir, hidrolik pompa (2) çalisir, yag tek yollu valften (3) enerji akümülatörüne (10) akar, enerji akümülatöründeki (10) yag basinci artar; Ve birinci basinç sensörüyle (12) izlenen basinç p2 degerine yükseldiginde, kontrol elemani (14), elektrik kesme tertibatina (4) kontrol sinyali göndermeyi durdurur; elektrik kesme tertibati (4), araç motorunun (5) çikis saftindan ayrilir; hidrolik pompasi (2) çalismayi durdurur ve ardindan kontrol elemani (14) ters valfin (11) kapali durumdan açik duruma çevrilmesi için ters valfin kontrol ucuna bir kontrol sinyali gönderir; bu durumda p1=p2 seklindedir, aktif süspansiyon pasif süspansiyona sorunsuz çevrilir, enerji akümülatörü (10) pasif süspansiyonun elastik elemani olarak kullanilir, tasma valfi (9) pasif süspansiyon sisteminin emniyet valfi olarak kullanilir; bu durumda araç harekete baslar, yani pasif süspansiyon modunda hareket eder; A2, araç park edildiginde ve pasif süspansiyon aktif süspansiyona çevrildiginde, kontrol elemani (14) ters valfe (11) sinyal göndermeyi durdurur; ters valf (11) açik durmdan kapali duruma geçer, yag, süspansiyon silindirinde (7) kilitlenir ve müteakiben kontrol elemani (14) açma basincini pa degerine ayarlamak üzere tasma valfine (9) kontrol sinyali gönderir, ardindan kontrol elemani (14) elektrik kesme tertibatina (4) bir kontrol sinyali gönderir; elektrik kesme tertibati (4), araç motorunun (5) çikis saftina baglidir ve buradan gücü alarak gücü hidrolik pompasina (2) gönderir, hidrolik pompasi (2) çalisir; kontrol elemani (14), ilgili deplasman komutunu deplasman sensörünün (16) geri besleme sinyaline göre servo valfin (6) kontrol ucuna gönderir; servo valf (6), süspansiyon silindirinin (7) piston kolunun hareketini tam strok orta pozisyonuna düzenledikten sonra, kontrol elemani (14) kontrol sinyalini servo valfin (6) kontrol ucuna göndermeyi durdurur ve servo valf (6), orta pozisyon durumuna geri döner; bu amaçla pasifsüspansiyon, aktif süspansiyon durumuna sorunsuz sekilde dönüstürülür; araç hareket etmeye baslar, kontrol elemani (14) ilgili deplasman sinyalini sürüs durumuna ve araç gövdesi durumuna göre ilgili isletimi düzenlemek üzere servo valfin (6) kontrol ucuna gönderir; bu sefer enerji akümülatörü (10), aktif süspansiyonun bir yedek güç elemani olarak kullanilir ve tasma valfi (9) ise aktif süspansiyon sisteminin emniyet valfi olarak kullanilir; araç, hareket etmeye baslar yani aktif süspansiyon modunda hareket eder. Son olarak yukarida belirtilen uygulamalarin mevcut tarifnameyi sinirlamak yerine mevcut tarifnameye göre teknik çözümü göstermek için kullanildigina dikkat edilmelidir. Mevcut tarifname yukaridaki uygulamalara referansla detayli sekilde tarif edilmesine ragmen teknikte uzman kisi tarafindan mevcut tarifnamenin degistirilmesine veya es deger sekilde ikame edilmesine olanak verilebilecegi anlasilmalidir; ancak, mevcut tarifnamenin konusundan ve kapsamindan ayrilmayan tüm teknik çözümler ve iyilestirmeler mevcut tarifnamenin istemlerinin kapsaminda olmalidir. TR DESCRIPTION ACTIVE-PASSIVE DUAL MODE SWITCHABLE VEHICLE SUSPENSION SYSTEM AND ASSOCIATED SWITCHING METHOD Technical Field The present specification relates to the technical field of a vehicle suspension, and in particular to a switchable suspension system in the form of active suspension and passive suspension, and a switching method. History Suspension system is an important component of a vehicle and has the function of transmitting force and moment between the wheels and chassis, buffering the impact force transmitted to the body from uneven roads, and reducing the vibration to ensure smooth driving and operational stability of the vehicle. Active suspension has better vibration damping performance than passive suspension, but the reliability of active suspension is relatively worse than passive suspension. If the vehicle is equipped only with active suspension, the driving safety and maneuverability of the vehicle will be difficult to ensure if a malfunction occurs. Therefore, active suspension and passive suspension are integrated into a vehicle body and can be varied so that driving safety and vehicle maneuverability are guaranteed while improving driving comfort. In the state of the art, when the active suspension system and passive suspension system integrated into a vehicle body are interchanged, the strong vibration problem will occur due to the unequal pressure of the two systems, and there is a greater potential safety risk. The effective operation of the active suspension system requires an energy accumulator as a backup power source, and the effective operation of the passive suspension system requires the energy accumulator as an elastic element. In the state of the art, the energy accumulator for active suspension and the energy accumulator for passive suspension are two independent elements, each playing its own role. The energy accumulator has a larger volume and quality than other hydraulic elements. When the number of energy accumulators is large, this not only increases the high requirements for the limited footprint of the vehicle body, but also increases the weight of the vehicle body, which is undesirable in terms of vehicle lightness. In light of the above technical problems, an aim of the present specification is to provide an active-passive dual-mode switching vehicle suspension system and a switching method that can realize a smooth transition of operating modes and allow the energy accumulator to be reused in two operating modes. Primarily, the present specification includes a filter, a hydraulic pump, a non-return valve, an electrical cut-out, a servo valve, a suspension cylinder, a discharge valve, a first pressure sensor, a second pressure sensor, a controller, an oil tank and a displacement valve. provides an active-passive dual-mode switching vehicle suspension system incorporating the sensor; The oil inlet of the filter is connected to the oil tank through an oil pipe, the oil outlet of the filter is connected to the oil inlet of the hydraulic pump through an oil pipe; the oil outlet of the hydraulic pump is connected to an oil inlet of the non-return valve via an oil pipe; An oil outlet of the one-way valve is connected to the oil inlet of the servo valve through an oil pipe; The return port of the servo valve is connected to the oil tank through an oil pipe. The drive shaft of the hydraulic pump is connected to the electrical cutting device via a mechanical structure; The electrical cutting device is connected to the output power of a vehicle engine, while the electrical cutting device is used to obtain power from the vehicle engine and transmit the power to the hydraulic pump. The servo valve is a three-position four-way electro-hydraulic servo valve, which includes three states of a left position, a middle position and a right position; The first working oil port of the servo valve is connected to the rodless space of the suspension cylinder, and the second working oil port of the servo valve is connected to the rod space of the suspension cylinder; When the servo valve is in the middle position, all passages between the oil inlet, the return port of the servo valve and the first oil port, the second working oil port of the servo valve are closed; When the servo valve is in the left position, a passage is opened between the oil inlet port of the servo valve and the first working oil port of the servo valve, and a passage is opened between the return port of the servo valve and the second working oil port of the servo valve; When the servo valve is in the right position, a passage is opened between the oil inlet port of the servo valve and the second working oil port of the servo valve, and a passage is opened between the return port of the servo valve and the first working oil port of the servo valve. The suspension cylinder is attached to the vehicle body, while the suspension cylinder is equipped with a displacement sensor to monitor the displacement of a piston rod connected to the hydraulic cylinder. The oil inlet of the overflow valve is connected to the oil outlet of the one-way valve through an oil pipe, and an oil outlet of the overflow valve is connected to the oil tank through an oil pipe. The opening pressure of the overflow valve is adjusted by the control element by sending a control signal to the control end of the overflow valve. The proportional relief valve can be used as a safety valve for an active suspension system or as a safety valve for a passive suspension system. The reverse valve and the servo valve are arranged in parallel, the oil inlet of the reverse valve is connected to the oil tank through an oil pipe, the return port of the reverse valve is connected to the oil inlet of the overflow valve through an oil pipe; The first working oil port of the reverse valve is connected to the rod gap of the suspension cylinder through an oil pipe, and the second working oil port of the reverse valve is connected to the rodless space of the suspension cylinder through an oil pipe. The energy accumulator is arranged in an oil path between the return port of the reverse valve and the oil inlet of the relief valve. The energy accumulator can be used as a backup power source for the active suspension system or as the elastic element of the passive suspension system. The first pressure sensor is provided in an oil path between the energy accumulator and the reverse valve to detect the oil pressure in the energy accumulator; The second pressure sensor is provided in an oil path between the rod-free space of the suspension cylinder and the first operating oil port of the servo valve to detect an oil pressure in the rod-free space of the suspension cylinder. The control end of the electrical cutting device, the control end of the servo valve, the control end of the relief valve and the control end of the reverse valve are connected to the control element, and the signals of these components are given by the control element. The servo valve is a three-position four-way electro-hydraulic servo valve, which includes three states of the left position, middle position and right position; When the servo valve is in the middle position, all passages between the oil inlet, the return ports of the servo valve and the first working oil port, and the second working oil port of the servo valve are closed. When the servo valve is in the left position, all passages between the oil inlet port of the servo valve and the first working oil inlet of the servo valve are closed. The passage between the oil return port of the servo valve and the second working oil port of the servo valve is opened, in this case, the oil can enter the rod-free space of the suspension cylinder through the oil inlet port of the servo valve and the first working oil port of the servo valve, and at the same time, the oil in the rod cavity of the suspension cylinder is opened. can flow back to the oil tank through the second working oil port of the servo valve and the oil return port of the servo valve; When the servo valve is in the right position, the passage between the oil inlet port of the servo valve and the second working oil port of the servo valve is opened, and the passage between the oil return port of the servo valve and the first working oil port of the servo valve is opened, this time the oil flows into the rod gap of the suspension cylinder into the oil inlet gap of the servo valve. and can enter through the second working oil port of the servo valve, at the same time, the oil in the rodless space of the suspension cylinder can flow back to the oil tank through the first working oil port and oil return port of the servo valve. In a preferred embodiment of the present invention, the relief valve is a proportional relief valve. According to a preferred embodiment of the present invention, the reverse valve is a two-position four-way electromagnetic reverse valve containing two states: opening and closing. When the reverse valve is closed, all passages between the oil inlet and the return port of the reverse valve, and between the first working oil port and the second working oil port of the reverse valve are closed; When the reverse valve is open, a passage is open between the oil inlet of the reverse valve and the first working oil port of the reverse valve, and a passage is open between the return port of the reverse valve and the second working oil port of the reverse valve. The oil in the rod-free space of the suspension cylinder can flow to the energy accumulator through the second working oil port of the reverse valve and the return port of the reverse valve, while the oil in the oil tank can flow into the rod cavity of the suspension cylinder through the oil inlet of the reverse valve and the first working oil port of the reverse valve. On the contrary, the oil in the energy accumulator can also flow into the rodless space of the suspension cylinder through the return port of the reverse valve and the second working oil port of the reverse valve, while the oil in the rod space of the suspension cylinder can flow back to the oil tank through the first working oil space of the reverse valve and the oil inlet of the reverse valve. Second, the present specification provides a switching method using an active-passive dual mode switching vehicle suspension system. When the suspension system is in active suspension mode, the reverse valve is in the closing state, and this time the opening pressure of the relief valve is the maximum pressure used for the safe operation of the active suspension system. The electrical cut-out device is connected to the power output of the vehicle engine and provides power to the hydraulic pump to drive the operation of the hydraulic pump. The control element sends the relevant control signal to the control end of the servo valve according to the driving condition and the condition of the vehicle body to regulate the operation. In this case, the energy accumulator is used as the backup power source of the active suspension system, and the relief valve is used as the safety valve of the active suspension system. When the suspension system is in passive suspension mode, the reverse valve is in the opening state, and this time the opening pressure of the relief valve is the maximum pressure used for the safe operation of the passive suspension system ps. The electrical cut-out device is disconnected from the power output shaft of the vehicle engine and the hydraulic pump stops operating. When the servo valve is in the middle position, the energy accumulator is used as the elastic element of the passive suspension system, while the collar valve is used as the safety valve of the passive suspension system. The method includes the following steps: A1. When the vehicle is parked and the active suspension switches to passive suspension, the control element sends the corresponding displacement command to the control end of the servo valve according to the feedback signal of the displacement sensor; the servo valve regulates the movement of the piston rod of the cylinder to the middle position of the full piston stroke, and then the control element stops sending the signal to the servo valve; The servo valve returns to the middle position state, the oil is locked in the suspension cylinder; The control element stops sending signals to the electrical cutting device, the connection of the electrical cutting device to the electrical cutting shaft of the vehicle engine is cut off, the hydraulic pump stops operating, in this case, the first pressure sensor detects that the pressure value in the energy accumulator is p0 and the pressure value signal in the energy accumulator is transferred to the control element, the second The pressure sensor detects that the pressure value in the rod-free space of the suspension cylinder has occurred, and then the signal of the pressure value in the rod-free space of the suspension cylinder is transmitted to the control element; The control element compares the pressure values p1 and pz and specifically makes the following adjustments: (1). If P1=p2, the control element sends a control signal to the control end of the reverse valve, adjusting the reverse valve from closed to open; The oil path between the rod-free space of the suspension cylinder and the energy accumulator is opened; The oil path between the rod gap and the oil gap of the suspension cylinder is opened; the control element sends a control signal to the control end of the relief valve to set the opening pressure in ps; Since p1 is equal to p2, there is no pressure difference when the reverse valve is opened and the active suspension is converted to passive suspension without any problems; this time the energy accumulator is used as an elastic element of the passive suspension, and the relief valve is used as the safety valve of the passive suspension system; this time the vehicle starts to move, that is, it moves in passive suspension mode; (2). If P1p2, the control element sends a control signal to the control end of the overflow valve, adjusts the opening pressure of the overflow valve as pz, and the oil flows back from the energy accumulator to the oil tank through the overflow valve; When the first pressure sensor monitors that the energy accumulator pressure decreases to pp, the control element sends the control signal to the control end of the overflow valve to adjust the opening pressure to ps; The control element then sends a control signal to the control end of the reverse valve to switch the reverse valve from closed to open; In this case, p1=p2, the active suspension is converted to passive suspension without any problems, the energy accumulator is used as the elastic element of the passive suspension, the collar valve is used as the safety valve of the passive suspension system; in this case the vehicle starts to move, i.e. moves in passive suspension mode; (3). If P2p1, the control element sends a control signal to the electrical cutting device and the electrical cutting device is reconnected to the output stage of the vehicle engine and obtains power from here and transfers the power to the hydraulic pump, the hydraulic pump works, the oil flows from the one-way valve to the energy accumulator, the oil pressure in the energy accumulator. increases; When the pressure monitored by the first pressure sensor increases to p2, the control element stops sending the control signal to the electrical cut-off device; the electrical cutting device is disconnected from the output shaft of the vehicle engine; the hydraulic pump stops working, then the control element sends a control signal to the control end of the reverse valve, switching the reverse valve from closed to open; this time it is p1=p2, the active suspension is smoothly converted into passive suspension, the energy accumulator is used as the elastic element of the passive suspension, and the collar valve is used as the safety valve of the passive suspension system; this time, the vehicle starts to move, that is, moves in passive suspension mode; and A2. When the vehicle is parked and the passive suspension switches to active suspension, the control element first stops sending the signal to the reverse valve; the reverse valve switches from the open state to the closed state, the oil is locked in the suspension cylinder, and subsequently the control element sends a control signal to the overflow valve to adjust the opening pressure to the pEl value, and then the control element sends a control signal to the electric cut-off device; The electrical cutting device is connected to the output shaft of the vehicle engine and receives the power from there and sends the power to the hydraulic pump. The hydraulic pump operates, the control element sends the relevant displacement command to the control end of the servo valve according to the feedback signal of the displacement sensor; After the servo valve regulates the movement of the piston rod of the suspension cylinder to the full stroke middle position, the control element stops sending the control signal to the control end of the servo valve, and the servo valve returns to the middle position state; For this purpose, passive suspension is smoothly converted into active suspension; The vehicle starts to move, the control element sends the corresponding displacement signal to the control end of the servo valve to regulate the corresponding operation according to the driving situation and the vehicle body condition; this time the energy accumulator is used as a backup power element of the active suspension, and the collar valve is used as the safety valve of the active suspension system; The vehicle starts to move, that is, it moves in active suspension mode. Compared to the prior art, the beneficial results of the present specification are as follows: when switching between active and passive dual-mode switching vehicle suspension system modes, the oil pressure in the rodless space of the suspension cylinder and the oil pressure in the energy accumulator are pre-adjusted to be equal, so that stable switching of the active-passive suspension system can be realized and When the existing active-passive suspension system is replaced, the vibration of the device body is eliminated; In the active-passive dual-mode switching vehicle suspension system according to the present specification, the energy accumulator can be used as a backup power source in active suspension mode or as an elastic element in passive suspension mode, and the relief valve can be used as a safety valve in active suspension mode and also as a safety valve in passive suspension mode. can be used, the number of uses of the energy accumulator and the relief valve are effectively reduced, thus achieving a large saving on the vehicle body, and according to the current specification, especially for emergency rescue vehicles that need to be loaded with various instruments and equipment, the suspension system is more suitable for further instruments and equipment on the vehicle body. It can free up installation space and effectively reduce the total mass of the vehicle body, thus being advantageous in terms of light weight of the vehicle chassis. Brief Description of the Drawings Figure 1 is a schematic view of an active-passive dual mode switching vehicle suspension system according to the present specification. In the drawings, 1-filter, 2-hydraulic pump, 3-one-way valve, 4-electrical cut-off device, 5-vehicle engine, B-servo valve, T-suspension cylinder, 8-vehicle body, 9-overflow valve, 10-energy accumulator, 'll-reverse valve, 12-first pressure sensor, 13-second pressure sensor, 14- control element, 15-oil tank, 16-displacement sensor, Pi-servo valve oil inlet, T1- servo valve return port, Ai -servo valve is the first working oil port, B1-servo valve is the second working oil port, P2-reverse valve is the oil inlet, T2-reverse valve is the return port, A2-reverse valve is the first working oil port, Bz-reverse valve is the second working oil port. Detailed Description The following detailed description of embodiments according to the present invention is provided together with the accompanying drawings rather than limiting the scope of the present specification. In the description of the present specification, the terms "front", "back", "left", "center", "right", "top", "belonging" and the like indicate directions or positional relationships based on those shown in the drawings and are intended only for purposes of description and simplification of the present specification. It will be understood that it provides convenience, but that the device or element referred to is in a specific orientation does not indicate or imply that it should be made and operated in a specific direction, therefore the present description cannot be interpreted as limiting. The terms "first", "second" or similar are used only for the purpose of simplifying the written description for distinguishing related objects from similar objects and shall not be construed as indicating a sequential relationship between particular orders. Unless otherwise expressly stated or otherwise limited in this application, it may include, for example, fixed links, detachable links or integral links; can be connected mechanically or electrically; It may be connected directly or indirectly through the intervening medium or between two elements. The specific meaning of the above terms in the present application can be properly understood by those of standard skill in the art. As shown in Figure 1, the active-passive dual mode switching vehicle suspension system specified in the application of the present specification consists of a filter (1), a hydraulic pump (2), a one-way valve (3), an electrical cut-off device (4), a servo. valve (6), a suspension cylinder (7), a relief valve (9), an energy accumulator (10), a reverse valve (11), a first pressure sensor (12), a second pressure sensor (13), a It includes a control element (14), an oil tank (15) and a displacement sensor (16). An oil inlet of the filter (1) is connected to the oil tank (15) through an oil pipe, the oil outlet of the filter (1) is connected to the oil inlet of the hydraulic pump (2) through an oil pipe, the oil outlet of the hydraulic pump (2) is connected to the oil tank (15) through an oil pipe. It is connected to the oil inlet of the one-way valve (3), the oil outlet of the one-way valve (3) is connected to the oil inlet (P1) of the servo valve through an oil pipe, and the return port (T1) of the servo valve is connected to the oil tank (15) through an oil pipe. A drive shaft of the hydraulic pump (2) is connected to the electrical cutting device (4) via a mechanical structure, and the electrical cutting device (4) is connected to the power output shaft of the vehicle engine (5). The electrical cut-off device (4) is used to obtain energy from the vehicle engine (5) and transfer the energy to the hydraulic pump (2). The first working oil port (A1) of the servo valve is connected to the rod-free space of the suspension cylinder (7), and the second working oil port (B1) of the servo valve is connected to the rod space of the suspension cylinder. The suspension cylinder (7) is connected to the vehicle body (8), and the suspension cylinder (7) is equipped with a displacement sensor (16) to monitor the change of the piston rod connected to a hydraulic cylinder. The oil inlet of the overflow valve (9) is connected to the oil outlet of the one-way valve (3) through an oil pipe, and the oil outlet of the overflow valve (9) is connected to the oil tank (15) through an oil pipe. The reverse valve (11) and the servo valve (6) are arranged in parallel, the oil inlet (Pz) of the reverse valve is connected to the oil tank (15) through an oil pipe; The return port (T2) of the reverse valve is connected to the oil inlet of the overflow valve (9) via an oil pipe. The first working oil port (A2) of the reverse valve is connected to the rod gap of the suspension cylinder (7) through an oil pipe, and the second working oil port (82) of the reverse valve is connected to the rodless space of the suspension cylinder (7) through an oil pipe. The energy accumulator (10) is arranged in an oil path between the return port (T2) of the reverse valve and the oil inlet of the overflow valve (9). The energy accumulator (10) can be used as a backup power source for the active suspension system or as the elastic element of the passive suspension system. The first pressure sensor (12) is equipped with an oil vias for detecting the oil pressure in the energy accumulator (10) between the energy accumulator (10) and the return port (T2) of the reverse valve. The second pressure sensor (13) is located between the rod-free space of the suspension cylinder (7) and the first working oil port (A1) of the servo valve, through an oil medium for detecting the oil pressure in the rod-free space of the suspension cylinder (7). The control end of the electric cut-off device (4) is connected to the servo valve. The control end (6), the control end of the relief valve (9) and the control end of the reverse valve (11) are connected to the control element (14), and the signals of these components are given by the control element (14). The servo valve (6) is a three-position four-way electro-hydraulic servo valve, including three states: left position, middle position and right position; When the servo valve (6) is in the middle position, all passages between the oil inlet (Pi) and the return port (Ti) of the servo valve and the first working oil port (A1) and the second working oil port (B1) of the servo valve are closed; When the servo valve (6) is in the left position, the passage between the oil inlet (Pi) of the servo valve and the first working oil port (A1) of the servo valve is opened, and the passage between the return port (T1) of the servo valve and the second working oil port (B1) of the servo valve is opened. , this time the oil can flow into the rod-free space of the suspension cylinder (7) through the oil inlet (P1) of the servo valve and the first working oil port (A1) of the servo valve, at the same time, the oil in the rod gap of the suspension cylinder (7) can flow into the second working oil port of the servo valve. (81) and can flow back to the oil tank (15) via the return port (T1) of the servo valve; When the servo valve (6) is in the left position, the passage between the oil inlet (Pi) of the servo valve and the second working oil port (81) of the servo valve is opened, and the passage between the return port (Ti) of the servo valve and the first working oil port (A1) of the servo valve is opened. , this time the oil can flow into the rodless space of the suspension cylinder (7) through the oil inlet (Pi) of the servo valve and the second working oil port (Bi) of the servo valve, at the same time, the oil in the rodless space of the suspension cylinder (7) can flow into the first working oil port of the servo valve. (A1) and can flow back to the oil tank (15) via the return port (T1) of the servo valve. The relief valve (9) is a proportional relief valve. The opening pressure of the overflow valve (9) can be adjusted by the control element (14) to transmit a control signal to the control end of the overflow valve (9). The overflow valve (9) can be used as a safety valve for the active suspension system or as a safety valve for the passive suspension system. The reverse valve (11) is a two-position electromagnetic reverse valve that contains two states: closing and opening. When the reverse valve (11) is in the closing state, all passages between the oil inlet (P2) and the return port (T2) of the reverse valve and between the first working oil port (A2) and the second working oil port (B2) of the reverse valve are closed; When the reverse valve (11) is open, a passage between the oil inlet (P2) of the reverse valve and the first working oil port (A2) of the reverse valve and a passage between the return port (T2) of the reverse valve and the second working oil port (82) of the reverse valve are both It is open; The oil in the rodless space of the suspension cylinder (7) can flow to the energy accumulator (10) through the second working oil port (82) of the reverse valve and the return port (T2) of the reverse valve, and the oil in the oil tank (15) can flow to the oil inlet (Pz) of the reverse valve and the return port (T2) of the reverse valve. It can flow into the rod gap of the suspension cylinder (7) via the first working oil port (A2). Contrary to this situation, the oil in the energy accumulator (10) can also flow into the rodless space of the suspension cylinder (7) through the return port (T2) of the reverse valve and the second working oil port (82) of the reverse valve. The oil in the rod gap of the suspension cylinder (7) can flow back to the oil tank (15) through the first working oil gap (A2) of the reverse valve and the oil inlet (Pz) of the reverse valve. According to the current specification, in the active-passive dual mode switching vehicle suspension system, when the relevant system operates in active suspension mode, the working parts are filter (2), hydraulic pump (2), one-way valve (3), electrical cut-off device (4), servo valve (6). It includes suspension cylinder (7), relief valve (9), energy accumulator (10), control element (14), oil tank (15) and displacement sensor (16). When the system operates in passive suspension mode, the working parts include the suspension cylinder (7), relief valve (9), energy accumulator (10), reverse valve (11) and oil tank (15). In active suspension mode, the electrical cut-out device (4) receives a signal and is constantly connected to the power output shaft of the vehicle engine (5) to drive the operation of the hydraulic pump (2). The control end of the servo valve (6) receives the control signal transmitted by the control element (14) and continues its operation. The overflow valve maintains an opening pressure of (9) pa (pa is the maximum pressure for safe operation of the active suspension system). This time the reverse valve (11) cannot receive a signal and continues to be kept in a closed state. In passive suspension mode, the electrical cutting device (4) cannot receive a signal and continues to disconnect from the power output shaft of the vehicle engine (5). The servo valve (6) cannot receive a signal and continues to be maintained in the middle position. The overflow valve (9) constantly maintains the opening pressure at the p value. The reverse valve (11) receives a signal and maintains it in an open state. According to the current specification, the switching method of the active-passive dual mode switching vehicle suspension system is as follows: When the suspension system is in active suspension mode, the reverse valve (11) is in the closing state, and this time the opening pressure of the overflow valve (9) is the maximum pressure used for the safe operation of the active suspension system. pa. The electrical cut-off device (4) is connected to the power output of the vehicle engine (5) and provides power to the hydraulic pump (2) to drive the operation of the hydraulic pump (2). The control element (14) sends the relevant control signal to the control end of the servo valve (6) according to the driving condition and the condition of the vehicle body in order to regulate the operation. In this case, the energy accumulator (10) is used as the backup power source of the active suspension system and the relief valve (9) is used as the safety valve of the active suspension system. When the suspension system is in passive suspension mode, the reverse valve (11) is in the opening state, and this time the opening pressure of the overflow valve (9) is the maximum pressure used for the safe operation of the passive suspension system ps. The power cut-off device (4) is disconnected from the power output shaft of the vehicle engine (5) and the hydraulic pump (2) stops operating. When the servo valve (6) is in the middle position, the energy accumulator (10) is used as the elastic element of the passive suspension system, while the overflow valve (9) is used as the safety valve of the passive suspension system. When the vehicle is parked and the active suspension switches to passive suspension, the control element (14) sends the relevant displacement command to the control end of the servo valve (6) according to the feedback signal of the displacement sensor; the servo valve (6) regulates the movement of the piston rod of the suspension cylinder (7) to the middle position of the full piston stroke, and then the control element (14) stops the signal being sent to the servo valve; the servo valve (6) returns to the middle position state, the oil is locked in the suspension cylinder (7); The control element (14) stops sending signals to the electrical cutting device (4), the electrical cutting device (4) is disconnected from the electrical cutting shaft of the vehicle engine (5), the hydraulic pump (2) stops operating, in this case, the first pressure sensor (12) It detects that the pressure value in the energy accumulator is pz and the pressure value signal is transferred to the control element (14), the second pressure sensor detects that the pressure value in the rodless space of the suspension cylinder (7) is pz and then the pressure value signal is transferred to the control element (14); The control element (14) compares the pressure values p1 and pz and specifically makes the following adjustments: (1) If p1=p2, the control element (14) sends a control signal to the control end of the reverse valve (11), turning the reverse valve (11) from closed to open. Sets it to go into state; The oil path between the rod-free space of the suspension cylinder (7) and the energy accumulator (10) is opened; The oil path between the rod gap of the suspension cylinder (7) and the oil tank (15) is opened; the control element (14) sends a control signal to the control end of the relief valve (9) to set the opening pressure ps as the maximum pressure; Since p1 is equal to pz, there is no pressure difference when the reverse valve (11) is opened and the active suspension is converted to passive suspension without any problems; this time the energy accumulator (10) is used as an elastic element of the passive suspension, and the relief valve (9) is used as the safety valve of the passive suspension system; this time the vehicle starts to move, that is, it moves in passive suspension mode; (2) If P1p2, the control element (14) sends a control signal to the control end of the overflow valve (9), adjusts the opening pressure of the overflow valve (9) by 20I, and the oil is transferred from the energy accumulator (10) to the oil tank (15) via the overflow valve (9). ) flows back; When the first pressure sensor (12) monitors that the pressure of the energy accumulator (10) decreases to pzvalue, the control element (14) sends the control signal to the control end of the overflow valve (9) to set the opening pressure ps as the maximum pressure; then the control element (14) sends a control signal to the control end of the reverse valve to convert the reverse valve (11) from the closed state to the open state; In this case, p1=p2, the active suspension is converted to passive suspension without any problems, the energy accumulator (10) is used as the elastic element of the passive suspension, the relief valve (9) is used as the safety valve of the passive suspension system; in this case the vehicle starts to move, i.e. moves in passive suspension mode; (3) If P2p1, the control element (14) sends a control signal to the electrical cutting device (4) and the electrical cutting device (4) is reconnected to the output shaft of the vehicle engine (5) and obtains power from there and transfers the power to the hydraulic pump (2). transfer, the hydraulic pump (2) operates, oil flows from the one-way valve (3) to the energy accumulator (10), the oil pressure in the energy accumulator (10) increases; And when the pressure monitored by the first pressure sensor (12) increases to the value p2, the control element (14) stops sending the control signal to the electrical cutting device (4); The electrical cutting device (4) is separated from the output shaft of the vehicle engine (5); the hydraulic pump (2) stops working, and then the control element (14) sends a control signal to the control end of the reverse valve to switch the reverse valve (11) from the closed state to the open state; In this case, p1=p2, the active suspension is converted to passive suspension without any problems, the energy accumulator (10) is used as the elastic element of the passive suspension, the relief valve (9) is used as the safety valve of the passive suspension system; in this case the vehicle starts to move, i.e. moves in passive suspension mode; A2, when the vehicle is parked and the passive suspension is changed to active suspension, the control element (14) stops sending signals to the reverse valve (11); the reverse valve (11) switches from open to closed, the oil is locked in the suspension cylinder (7), and subsequently the control element (14) sends a control signal to the relief valve (9) to adjust the opening pressure to the pa value, then the control element (14) activates the electric cut-off device. (4) sends a control signal; The electrical cutting device (4) is connected to the output shaft of the vehicle engine (5) and receives the power from there and sends the power to the hydraulic pump (2), the hydraulic pump (2) operates; The control element (14) sends the relevant displacement command to the control end of the servo valve (6) according to the feedback signal of the displacement sensor (16); After the servo valve (6) regulates the movement of the piston rod of the suspension cylinder (7) to the full stroke mid-position, the control element (14) stops sending the control signal to the control end of the servo valve (6), and the servo valve (6) returns to the mid-position state; For this purpose, passive suspension is smoothly converted into active suspension; The vehicle starts to move, the control element (14) sends the relevant displacement signal to the control end of the servo valve (6) to regulate the relevant operation according to the driving condition and vehicle body condition; this time the energy accumulator (10) is used as a backup power element of the active suspension and the relief valve (9) is used as the safety valve of the active suspension system; The vehicle starts to move, that is, it moves in active suspension mode. Finally, it should be noted that the above-mentioned embodiments are used to illustrate the technical solution according to the current specification, rather than to limit the existing specification. Although the present specification is described in detail with reference to the above embodiments, it should be understood that modifications or equivalent substitutions of the present specification may be permitted by the person skilled in the art; However, all technical solutions and improvements that do not depart from the subject and scope of the current specification must be within the scope of the claims of the current specification.TR

TR2022/001436 2020-07-24 ACTIVE-PASSIVE DUAL MODE TRANSITIONAL VEHICLE SUSPENSION SYSTEM AND RELATED TRANSITION METHOD TR2022001436T2 (en)

Publications (1)

Publication Number Publication Date
TR2022001436T2 true TR2022001436T2 (en) 2023-04-24

Family

ID=

Similar Documents

Publication Publication Date Title
WO2021023026A1 (en) Active-passive dual mode switchable vehicle suspension system and switching method therefor
US8505848B2 (en) Aircraft actuator hydraulic system
US20160238041A1 (en) Hydraulic Pressure Circuit and Working Machine
US20110071738A1 (en) Controller of hybrid construction machine
KR101670529B1 (en) Hydraulic pump flux control apparatus for construction machinery
JP2007046790A (en) Actuation system
CA2694250C (en) Fluid pressure drive unit and snow removal unit
US8596575B2 (en) Aircraft actuator
US20130219878A1 (en) Aircraft actuator hydraulic system
TR2022001436T2 (en) ACTIVE-PASSIVE DUAL MODE TRANSITIONAL VEHICLE SUSPENSION SYSTEM AND RELATED TRANSITION METHOD
EP3434910B1 (en) Shovel and control valve for shovel
CN214007638U (en) Power controller of mechanical hydraulic pump and hydraulic system
CN210769613U (en) Control valve for emergency rescue vehicle
CN219341657U (en) Hydraulic control system for forklift
CN215719882U (en) Multi-mode control system suitable for EHA
CN110630579B (en) Control valve for rescue vehicle
CN215409480U (en) Pump control system for EHA
CN218493910U (en) Hydraulic steering system, whole vehicle hydraulic control system and operation machine
US20230090110A1 (en) Electro-hydrostatic circuit and aircraft
CN117622312A (en) Wireless remote control automatic steering device of fire truck
CN219707095U (en) Hydraulic system for engineering machinery and engineering machinery
JP3741915B2 (en) Actuation system
CN117184393A (en) Electrohydraulic steering device and method with power failure emergency function
JPH0735161Y2 (en) Hydraulic pump controller for hydraulically driven vehicles
TH2201000671A (en) A vehicle suspension system capable of dual active-passive mode switching and a switching method for that system.