Yuav Ua Li Cas Txiav Txim Siab Yog Ib Lub Rooj Sib Tham Rocker Yuav Tsum Tau Hloov: Ib Daim Ntawv Qhia Tag Nrho Los Ntawm Cov Mob Rau Kev Ntsuas

Raws li cov ntsiab lus tseem ceeb ntawm lub cav lub tsheb ciav hlau valve, rocker caj npab sib dhos ncaj qha cuam tshuam rau kev noj qab haus huv, kev ua tiav kev sib txuas thiab lub zog tso zis. Hnav, tawg lossis lubrication tsis ua haujlwm ntawm lub caj npab rocker tuaj yeem ua rau muaj kev ua tsis tiav los yog ua tiav lub cav tsis ua haujlwm. Nyob rau hauv daim ntawv no, rau lub hauv paus ntsiab lus rau kev txiav txim siab thaum lub rocker caj npab los ua ke yuav tsum tau hloov yog systematically sau los ntawm combining engineering piv txwv thiab kev xeem txoj kev.
I. Kev Tshawb Fawb Txog Kev Tshawb Fawb: Cov cim ceeb toom ntawm cov suab txawv txav
1. Hlau khob
Yam tshwm sim: Muaj lub suab "nias" lossis "nias" lub suab thaum lub cav khiav, tshwj xeeb tshaj yog thaum tsis muaj zog lossis qis qis.
Ua rau Analysis:
Hnav rau ntawm qhov chaw sib txuas ntawm lub caj npab rocker lub taub hau thiab qia tsim pits, ua rau muaj kev tshem tawm ntau dhau (piv txwv li, nyob rau hauv cov ntaub ntawv ntawm Hyundai Porter II tsheb, lub suab nrov txawv txav tshwm sim thaum lub rocker caj npab lub taub hau hnav mus rau qhov tob ntawm 0.5mm).
Hnav lub rocker bushing ua rau axial txav, uas cuam tshuam rau lub caj npab lub qhov (cov ntaub ntawv kho Audi A4 pom qhov nce peb zaug ntawm lub suab nrov txawv txav thaum lub bushing clearance tshaj 0.15mm).
Kev Tshawb Fawb:
1. **Valve Spring Noise:**
** Cov tsos mob xws li:** Ib "beep," zoo ib yam li kab civliv chirp, tshwm, tsis muaj zog, lossis ploj ntawm kev kub ceev.
**Ua Analysis:**
** Kev sib cuag tsis zoo ntawm lub caij nplooj ntoos hlav rocker thiab rocker tuaj yeem ua rau muaj kev sib txhuam thiab suab nrov thaum lub sijhawm txav mus los (cov ntaub ntawv kho cov cav diesel qhia qhov no tshwm sim thaum lub caij nplooj ntoos hlav quab yuam poob rau 60% ntawm nws cov nqi qub).
**Txoj Kev Tshawb Nrhiav:**
** Tshem lub kaus mom thiab saib xyuas lub caij nplooj ntoos hlav installation.
** Ntsuas lub caij nplooj ntoos hlav qhov ntev pub dawb (tus qauv ± 0.5mm yog txais).
** II. Visual Diagnosis:**
** Kev ntsuam xyuas ntau ntawm kev hnav thiab tsim kua muag: **
**1. Tiv tauj qhov chaw hnav kom pom: **
**Key Segments:**
* Rocker caj npab taub hau **
** Shaker Short End thiab Push/hydraulic tappet contact nto **
** Kev Xeem Xeem:**
** Ntsuas qhov tob ntawm hnav siv lub micrometer thiab hloov yog tias nws siab tshaj 0.3mm (raws li tau teev tseg hauv phau ntawv saib xyuas). Saib xyuas lub xub ntiag ntawm cov kauj ruam hnav ntawm qhov chaw tiv tauj (piv txwv li, hauv ib rooj plaub, hnav ntawm lub caj npab rocker lub taub hau tsim 0.2 hli kauj ruam uas tiv thaiv valve los ntawm kev kaw kom zoo).
Kho kev txwv: me me (<0.1mm) may be repaired with an oilstone, provided that surface roughness ≤ 1.6 μm for Ra is ensured.
2. Kev soj ntsuam xyuas
Cov cuab yeej tshuaj xyuas:
Inner diameter gauge (ntsuas inner diameter of bushing)
Sab nraud txoj kab uas hla micrometer (ntsuas lub cheeb sab nraud ntawm lub rocker caj npab ncej)
Cov txheej txheem txiav txim: Tus nqi tshem tawm=inner diameter of casing- sab nraud txoj kab uas hla rocker caj npab ncej. Yog tias nws siab tshaj 0.08mm, nws yuav tsum tau hloov pauv (raws li qee qhov kev kho lub cav).
Floating rocker arm bearing clearance tshaj 0.05mm yuav tsum tau hloov VTEC cav cav).
III. Kev Ntsuam Xyuas Kev Ua Haujlwm: Cov tshuaj tiv thaiv saw ntawm lub zog sib dhos
1. Kev poob hluav taws xob thiab kev siv roj ntau ntxiv
Tej yam tshwm sim:
Tsis muaj zog acceleration (nce nyob rau hauv lub sij hawm acceleration ntau tshaj 15% ntawm 0-100km / h)
• Tsis zoo li lub cav ceev ceev thaum nce toj roob (piv txwv li, lub tsheb thauj khoom tsis tuaj yeem tuav ceev ntawm 4,000 rpm txawm nyob ntawm txoj kab nqes 30%)
Ua rau Analysis:
:: Kev nqa tsis txaus vim Rocker caj npab hnav (kev ntsuas qhov tseeb qhia tau hais tias 5 feem pua ​​​​ntawm rocker caj npab mus rau qhov yuam kev piv thiab qhov txo qis ntawm 0.8mm).
:: Ntau lub valve tshem tawm, ua rau txo qis kev ua haujlwm (qhov kev sim cav cav pom tias rau txhua txhua 0.1 hli nce hauv kev tshem tawm, kom tsawg dua 3%).
2. Pib-txog cov teeb meem thiab kev tso tawm tsis zoo
Tej yam tshwm sim:
Ntau qhov kev sim hluav taws xob xav tau rau kev pib txias (ntau dua 3 zaug)
* Cov pa luam yeeb dub los ntawm cov pa tawm (HC emissions tshaj 200%)
Ua rau Analysis:
:: Ib tug tawg rocker caj npab ua rau lub valve yuav daig (piv txwv li, nyob rau hauv ib rooj plaub, lub taub hau ntawm 2-lub tog raj kheej tso rocker tsoo, tiv thaiv ob lub valve los ntawm kaw). Ib qho thaiv nyob rau hauv lub lubrication Circuit Court ua rau lub valve qia los ua daig (thaum lub cav tshem tawm, 40% ntawm cov roj foob pob hluav taws tau pom tias raug thaiv los ntawm cov hlau shavings).
IV. INTRODUCTION Kev Ntsuas Tshwj Xeeb: Kev Ntsuas Siab Siab
1. Hydraulic Clearance Adjuster Testing (VTEC thiab lwm lub sijhawm sib txawv ntawm lub valve)
Cov txheej txheem kuaj:
Ntsuas qhov ntsuas siab ntawm tus tswj hwm siv lub ntsuas ntsuas siab (tus qauv tus nqi 1.2-1.5MPa).
Saib xyuas seb lub piston adjuster txav tau yooj yim (hauv ib qho kev saib xyuas, piston jamming tiv thaiv kev hloov mus rau hom kev kub ceev).
Cov ntaub ntawv hauv qhov taw tes: Lub cav Honda Accord poob lub zog ntawm 3,500 rpm; Lub qhov nyob rau hauv VTEC rocker tau pom tias tau thaiv los ntawm cov pa roj carbon deposits tom qab disassembly.
2. Dynamic Clearance Measurement
Cov khoom siv kuaj:
Feeler gauge (zoo li qub ntsuas)
Laser tshem tawm sensor (dynamic ntsuas)
Test Standard: Cold Gap: Intake valve 0.20-0.35mm, Exhaust valve 0.25-0.40mm.
Thermalstate tshem tawm: Lub thermal expansion coefficient ntawm cov khoom yuav tsum tau kho (xws li . 23 × 10-6℃C rau aluminium alloy rocker caj npab).
V. Kev tiv thaiv kev hloov pauv: kev txiav txim siab raws li cov kauj ruam thiab kev ua haujlwm
1. Lub Sijhawm Hloov Lub Sijhawm
Hom tsheb|Hloov Mileage|Ntsiab Cai
Cov tsheb thauj khoom lag luam|80, 000 -100,000 km|Accelerated hnav thiab tsim kua muag vim siab load
Tsheb neeg caij tsheb|60, 000 -80,000 km|Lub voj voog nquag nres hauv nroog
Siab -kev ua tau zoo cav|40, 000 -60,000 km|Cov txheej txheem sib txawv ntawm lub sijhawm sib txawv, xws li VTEC
2. Hloov kom sai li sai tau raws li kev ua haujlwm tshwj xeeb
Harsh Environments: It is recommended that vehicles travelling in dust, heat (>90 degree) lossis av noo rau lub sijhawm ntev yuav raug tshuaj xyuas txhua 40,000 km.
Hloov Kho Tsheb: Hloov cov cav nrog kev nce hauv lub zog ntau dua 20 feem pua ​​​​yuav tsum muaj kev soj ntsuam luv luv ntawm 20,000 km.
Lub tsheb sib tsoo: Tom qab kev sib tsoo chassis, xyuas lub caj npab ntawm caj npab kom deformation (hloov thaum khoov ntau tshaj 0.05mm) tam sim ntawd.
VI. INTRODUCTION Kho rooj plaub: tag nrho cov txheej txheem los ntawm malfunction mus daws
Cov ntaub ntawv hauv cov ntsiab lus: Ib lub tsheb 120,000 km Hyundai Porter II tau nthuav tawm cov cim ntawm kev nrawm nrawm thiab cov pa luam yeeb dub los ntawm nws cov yeeb nkab.
Txheej txheem kuaj mob:
Suab: Qhov tseem ceeb hlau tapping tau kuaj pom hauv lub tog raj kheej 3.
Clearance Measurement: Lub tog raj kheej lub qhov tso pa tawm valve tshem tawm ntawm 0.6 hli (tus qauv 0.35 hli) siv aa feeler gauge.
Kev tshuaj xyuas tshem tawm: tso pa tawm rocker lub taub hau coj qhov tob yog 0.4 hli, bushing clearance yog 0.12 hli.
Hloov: Hloov lub pob rocker caj npab los ua ke thiab kho valve clearance rau tus qauv.
Tsau: Lub zog rov qab mus rau qib Hoobkas (0-100km / h acceleration lub sij hawm txo mus rau 18 vib nas this).
Cov pa hluav taws xob ua tau raws li cov qauv (HC qhov tseem ceeb ntawm 1200 ppm txog 200 ppm).
Xaus: Kev kuaj pom tseeb thiab kev saib xyuas kev tshawb fawb.
Kev txiav txim siab los hloov lub rooj sib tham rocker caj npab yuav tsum muaj kev ntsuam xyuas dav dav ntawm lub suab, lub zeem muag, kev ua tau zoo thiab cov txiaj ntsig kev tshaj lij, thiab kev txhim kho cov kev daws teeb meem ntawm tus kheej uas suav nrog lub tsheb kauj vab thiab kev ua haujlwm. Peb pom zoo cov neeg tsav tsheb:
Kev kuaj xyuas yooj yim yog ua txhua 20,000 km (kev ntsuas kev tshem tawm + kev kuaj lub suab tsis zoo).
Kev tshuaj xyuas tag nrho (nrog rau kev ntsuas kev tshem tawm + kev tshuaj xyuas hydraulic) yog ua txhua txhua 60,000 km.
Thaum twg muaj hluav taws xob hluav taws xob, lub suab nrov txawv txav, emissions tsis zoo, thiab lwm yam, kho tam sim ntawd kom tsis txhob muaj cov tshuaj tiv thaiv kab mob ua haujlwm tsis zoo.
Los ntawm kev kuaj mob thiab kev tiv thaiv kev saib xyuas ntawm lub cev, lub neej kev pab cuam ntawm lub rocker caj npab tuaj yeem txuas ntxiv mus kom ntseeg tau tias lub tshuab ua haujlwm tau zoo thiab ruaj khov.