ICE detonation - ua rau thiab qhov tshwm sim

Internal combustion engine detonation tuaj yeem ua rau hnyav hnyav ntawm xws li qhov chaw ntawm lub tshuab hluav taws xob sab hauv xws li lub tog raj kheej lub taub hau gasket, cov ntsiab lus ntawm lub tog raj kheej-piston pawg, pistons, lub tog raj kheej thiab lwm yam. Tag nrho cov no ua rau txo cov peev txheej ntawm lub zog hluav taws xob mus txog qhov ua tsis tiav. Yog tias qhov tshwm sim tsis zoo no tshwm sim, nws yuav tsum kuaj xyuas qhov ua rau lub detonation sai li sai tau thiab tshem tawm nws. Yuav ua li cas thiab yuav tsum xyuam xim rau - nyeem rau.

Dab tsi yog detonation

Detonation yog ua txhaum ntawm cov txheej txheem combustion ntawm cov roj sib tov nyob rau hauv lub combustion chamber, thaum combustion tsis tshwm sim smoothly, tab sis explosively. Nyob rau tib lub sijhawm, qhov nrawm ntawm kev nthuav tawm ntawm lub suab nrov nrov nce los ntawm tus qauv 30 ... 45 m / s mus rau supersonic 2000 m / s (qhov siab tshaj qhov ceev ntawm lub suab los ntawm lub moj tej tawg kuj yog qhov ua rau npuaj). Nyob rau hauv cov ntaub ntawv no, combustible-cua sib tov explodes tsis yog los ntawm ib tug spark los ntawm ib tug tswm ciab, tab sis spontaneously, los ntawm kev kub siab nyob rau hauv lub combustion chamber.

Lawm, lub zog moj tej tawg yog heev teeb meem rau cov phab ntsa ntawm lub tog raj kheej, uas overheat, lub pistons, lub tog raj kheej taub hau gasket. Lub tom kawg raug kev txom nyem tshaj plaws thiab nyob rau hauv tus txheej txheem ntawm detonation, qhov tawg thiab kub siab corny hlawv nws (nyob rau hauv slang nws yog hu ua "blows tawm").

Detonation yog tus yam ntxwv ntawm ICEs khiav ntawm roj av (carburetor thiab txhaj tshuaj), suav nrog cov khoom siv roj-pas pa (HBO), uas yog, khiav ntawm methane lossis propane. Txawm li cas los xij, feem ntau nws zoo nkaus li meej hauv cov tshuab carbureted. Diesel cav ua haujlwm nyob rau hauv ib txoj kev sib txawv, thiab muaj lwm yam laj thawj rau qhov tshwm sim no.

Ua rau detonation ntawm lub internal combustion engine

Raws li kev xyaum qhia, feem ntau detonation tshwm sim ntawm cov qub carburetor ICEs, txawm hais tias qee qhov txheej txheem no kuj tuaj yeem tshwm sim ntawm cov tshuab txhaj tshuaj niaj hnub uas nruab nrog lub tshuab hluav taws xob tswj. Yog vim li cas rau detonation tej zaum yuav muaj xws li:

• Nthuav roj-cua sib tov. Nws muaj pes tsawg leeg kuj tuaj yeem ignite ua ntej lub txim nkag mus rau hauv combustion chamber. Nyob rau tib lub sijhawm, qhov kub thiab txias provoke qhov tshwm sim ntawm cov txheej txheem oxidative, uas yog qhov ua rau tawg, uas yog, detonation.
• Thaum ntxov ignition. Nrog rau lub kaum ntse ntse ntxiv, cov txheej txheem ignition ntawm huab cua-roj sib tov kuj pib ua ntej lub piston hits lub npe hu ua saum toj kawg nkaus.
• Siv cov roj tsis raug. Yog tias cov roj av nrog qhov ntsuas octane qis dua tau nchuav rau hauv lub tsheb lub tank tshaj li qhov chaw tsim tshuaj paus, ces cov txheej txheem detonation yuav tshwm sim. Qhov no tau piav qhia los ntawm qhov tseeb tias cov roj av qis-octane muaj tshuaj lom neeg ntau dua thiab nkag mus rau hauv cov tshuaj tiv thaiv sai dua. Ib qho xwm txheej zoo sib xws yuav tshwm sim yog tias, es tsis txhob siv cov roj av zoo, qee yam ntawm surrogate zoo li condensate yog nchuav rau hauv lub tank.
• High compression ratio nyob rau hauv lub tog raj kheej. Nyob rau hauv lwm yam lus, coking los yog lwm yam kab mob nyob rau hauv lub internal combustion engine cylinders, uas maj accumulates nyob rau hauv lub pistons. Thiab qhov ntau soot yog nyob rau hauv lub internal combustion engine - qhov ntau dua qhov yuav ua rau detonation nyob rau hauv nws.
• Faulty internal combustion engine txias system. Qhov tseeb yog hais tias yog hais tias lub internal combustion engine overheats, ces lub siab nyob rau hauv lub combustion chamber yuav nce, thiab qhov no, nyob rau hauv lem, yuav ua rau roj detonation nyob rau hauv tsim nyog tej yam kev mob.

Lub khob sensor zoo li lub microphone.

Cov no yog cov laj thawj uas yog yam ntxwv ntawm ob qho tib si carburetor thiab txhaj tshuaj ICEs. Txawm li cas los xij, kev txhaj tshuaj sab hauv combustion cav kuj tseem muaj ib qho laj thawj - qhov tsis ua haujlwm ntawm lub khob qhov rooj. Nws muab cov ntaub ntawv tsim nyog rau ECU txog qhov tshwm sim ntawm qhov tshwm sim no thiab chav tswj tau hloov pauv lub kaum sab xis kom tshem tawm nws. Yog tias lub sensor tsis ua haujlwm, ECU yuav tsis ua qhov no. Nyob rau tib lub sijhawm, Lub Teeb Tshawb Xyuas Lub Teeb ntawm lub dashboard tau qhib, thiab lub tshuab luam ntawv yuav ua rau lub cav tawg yuam kev (cov lej kuaj P0325, P0326, P0327, P0328).

Tam sim no, muaj ntau ntau txoj kev xaiv rau flashing lub ECU thiaj li yuav txo tau roj noj. Txawm li cas los xij, lawv txoj kev siv tsis yog qhov kev daws teeb meem zoo tshaj plaws, vim tias muaj ntau zaus thaum lub flashing ua rau muaj kev nyuaj siab, uas yog, kev ua haujlwm tsis raug ntawm lub khob sensor, uas yog, ICE tswj tsev tsuas yog muab nws tawm. Raws li, yog tias detonation tshwm sim, lub sensor tsis qhia qhov no thiab cov khoom siv hluav taws xob tsis muaj dab tsi los tshem tawm nws. kuj muaj tsawg zaus, kev puas tsuaj rau cov xaim los ntawm lub sensor mus rau lub computer yog ua tau. Nyob rau hauv cov ntaub ntawv no, lub teeb liab kuj tsis ncav cuag lub tswj chav tsev thiab ib tug zoo xws li cov teeb meem tshwm sim. Txawm li cas los xij, tag nrho cov kev ua yuam kev no tau yooj yim kuaj tau siv lub tshuab luam ntawv yuam kev.

tseem muaj ntau lub hom phiaj tseem ceeb cuam tshuam qhov tshwm sim ntawm detonation hauv ib tus neeg ICEs. xws li:

• Lub compression ratio ntawm lub internal combustion engine. Nws qhov tseem ceeb yog vim qhov tsim cov yam ntxwv ntawm lub cav combustion sab hauv, yog li yog tias lub cav muaj qhov sib piv siab, ces txoj kev xav nws muaj ntau dua rau detonation.
• Cov duab ntawm lub combustion chamber thiab piston crown. Qhov no kuj yog ib tug tsim feature ntawm lub cev muaj zog, thiab ib co niaj hnub me me tab sis muaj zog combustion engines kuj muaj feem xyuam rau detonation (txawm li cas los, lawv electronics tswj cov txheej txheem no thiab detonation nyob rau hauv lawv yog tsawg).
• Forced cav. Lawv feem ntau muaj qhov kub thiab txias kub thiab siab siab, feem, lawv kuj muaj feem cuam tshuam rau detonation.
• Turbo motors. Zoo ib yam li cov ntsiab lus dhau los.

Raws li rau detonation ntawm diesel ICEs, yog vim li cas rau nws tshwm sim tej zaum yuav cov roj txhaj tshuaj ua ntej lub kaum sab xis, tsis zoo ntawm cov roj diesel, thiab teeb meem nrog lub internal combustion engine txias system.

kuj cov kev ua haujlwm ntawm lub tsheb tuaj yeem yog qhov ua rau detonation. uas yog, lub internal combustion engine yog ntau raug rau qhov tshwm sim, muab hais tias lub tsheb yog nyob rau hauv siab iav, tab sis nyob rau hauv tsawg ceev thiab engine ceev. Nyob rau hauv cov ntaub ntawv no, ib tug high degree ntawm compression tshwm sim, uas yuav provoke lub tsos ntawm detonation.

Tsis tas li ntawd, qee tus tswv tsheb nrhiav kom txo cov roj noj, thiab rau qhov no lawv reflash ECU ntawm lawv lub tsheb. Txawm li cas los xij, tom qab qhov no, qhov xwm txheej yuav tshwm sim thaum cov huab cua tsis zoo-roj sib tov txo cov kev hloov pauv ntawm lub tsheb, thaum lub sijhawm thauj khoom ntawm nws lub cav nce, thiab cov khoom hnyav ntxiv yuav muaj kev pheej hmoo ntawm roj detonation.

Dab tsi ua rau tsis meej pem nrog detonation

Muaj xws li ib tug hu ua "kub ignition". Ntau tus neeg tsav tsheb tsis muaj kev paub tsis meej pem nrog kev tawg, vim tias nrog lub teeb ci ntsa iab, lub tshuab hluav taws xob sab hauv txuas ntxiv ua haujlwm txawm tias thaum lub tshuab hluav taws xob tua. Qhov tseeb, nyob rau hauv cov ntaub ntawv no, cov huab cua-roj sib tov ignites los ntawm lub rhuab ntsiab ntawm lub internal combustion engine thiab qhov no tsis muaj dab tsi ua nrog detonation.

kuj yog ib qho phenomenon uas yog yuam kev suav hais tias yog vim li cas detonation ntawm lub internal combustion engine thaum lub ignition tawm yog hu ua dieseling. Tus cwj pwm no yog tus cwj pwm los ntawm kev ua haujlwm luv luv ntawm lub cav tom qab lub tshuab hluav taws xob raug tua ntawm qhov sib piv ntawm compression ntau dua lossis siv cov roj uas tsis tsim nyog rau kev tiv thaiv detonation. Thiab qhov no ua rau spontaneous ignition ntawm combustible-air sib tov. Ntawd yog, ignition tshwm sim zoo li nyob rau hauv lub cav diesel, nyob rau hauv siab.

Cov cim ntawm detonation

Muaj ntau cov cim qhia los ntawm qhov uas nws tuaj yeem txiav txim siab ncaj qha tias kev tawg tshwm sim nyob rau hauv lub cav combustion sab hauv ntawm ib lub tsheb tshwj xeeb. Nws tsim nyog hais tam sim ntawd tias qee qhov ntawm lawv yuav qhia tau tias muaj lwm yam kev puas tsuaj hauv lub tsheb, tab sis nws tseem tsim nyog kuaj xyuas qhov tawg hauv lub cev muaj zog. Yog li cov cim qhia yog:

• Cov tsos ntawm ib lub suab hlau los ntawm lub cav combustion sab hauv thaum nws ua haujlwm. Qhov no yog qhov tseeb tshwj xeeb tshaj yog thaum lub cav khiav hauv qab load thiab / lossis ntawm kev kub ceev. Lub suab zoo ib yam li qhov tshwm sim thaum ob lub tsev hlau sib tsoo. Lub suab no tsuas yog tshwm sim los ntawm kev tawg nthwv dej.
• ICE lub zog poob. Feem ntau, tib lub sijhawm, lub tshuab hluav taws xob sab hauv tsis ua haujlwm ruaj khov, nws tuaj yeem nres thaum idling (tseem ceeb rau cov tsheb carburetor), nws tuaj yeem ceev ceev rau lub sijhawm ntev, lub tsheb cov yam ntxwv dynamic txo (nws tsis nrawm, tshwj xeeb tshaj yog tias lub tsheb thauj khoom).

Diagnostic scanner Rokodil ScanX rau kev txuas rau lub tsheb ECU

Tam sim ntawd nws tsim nyog muab cov cim qhia ntawm kev ua tsis tiav ntawm lub khob sensor. Raws li nyob rau hauv daim ntawv teev dhau los, cov paib yuav qhia txog lwm yam kev puas tsuaj, tab sis rau cov tshuab txhaj tshuaj nws yog qhov zoo dua los xyuas qhov yuam kev siv lub tshuab hluav taws xob scanner (nws yog qhov yooj yim tshaj plaws los ua qhov no nrog ntau hom scanner. Rokodil ScanX uas yog sib xws nrog txhua lub tsheb txij li xyoo 1993 mus txog. thiab tso cai rau koj txuas rau lub smartphone ntawm iOS thiab Android ntawm Bluetooth). Cov cuab yeej zoo li no yuav ua rau nws tuaj yeem pom kev ua haujlwm ntawm lub khob qhov rooj thiab lwm yam hauv lub sijhawm.

Yog li, cov cim qhia ntawm kev ua tsis tiav ntawm lub khob sensor:

• kev ua haujlwm tsis ruaj khov ntawm lub cav combustion sab hauv ntawm qhov tsis ua haujlwm;
• poob rau hauv lub cav fais fab thiab, feem ntau, lub dynamic yam ntxwv ntawm lub tsheb (accelerates weakly, tsis rub);
• nce roj noj;
• nyuaj pib ntawm lub internal combustion engine, nyob rau hauv qis kub qhov no yog tshwj xeeb tshaj yog pom.

Feem ntau, cov cim qhia zoo ib yam rau cov uas tshwm sim nrog lub ignition lig.

Qhov tshwm sim ntawm detonation

Raws li tau hais los saum toj no, qhov tshwm sim ntawm detonation nyob rau hauv lub combustion engine nyob rau hauv lub tsheb yog heev loj, thiab nyob rau hauv tsis muaj cov ntaub ntawv yuav tsum tau kho kev ua hauj lwm yuav ncua, vim hais tias ntev npaum li cas koj tsav nrog rau qhov tshwm sim, qhov kev puas tsuaj rau lub internal combustion engine thiab nws cov neeg. raug rau. Yog li, qhov tshwm sim ntawm detonation muaj xws li:

• Burnt lub tog raj kheej taub hau gasket. Cov khoom siv los ntawm nws yog tsim (txawm tias niaj hnub no) tsis yog tsim los ua haujlwm nyob rau hauv cov xwm txheej ntawm qhov kub thiab txias uas tshwm sim thaum lub sij hawm detonation txheej txheem. Yog li ntawd, nws yuav ua tsis tau sai heev. Lub tog raj kheej tawg lub taub hau gasket yuav ua rau lwm yam teeb meem.
• Accelerated hnav ntawm cov ntsiab lus ntawm lub tog raj kheej-piston pawg. Qhov no siv rau tag nrho nws cov ntsiab lus. Thiab yog hais tias lub combustion engine yog tsis tshiab lawm los yog nws tsis tau overhauled rau lub sij hawm ntev, ces qhov no yuav xaus heev heev, mus txog rau nws tiav tsis ua hauj lwm.
• Kev tawg ntawm lub tog raj kheej taub hau. Cov ntaub ntawv no yog ib qho nyuaj tshaj plaws thiab txaus ntshai, tab sis yog tias koj tsav lub sijhawm ntev nrog kev detonation, ces nws qhov kev siv tau zoo heev.

Burnt lub tog raj kheej taub hau gasket

Piston puas thiab puas

• Piston / Pistons Burnout. uas yog, nws hauv qab, qis dua. Nyob rau tib lub sijhawm, feem ntau nws tsis tuaj yeem kho nws thiab nws tsuas yog yuav tsum tau hloov tag nrho.
• Kev puas tsuaj ntawm jumpers ntawm cov nplhaib. Nyob rau hauv tus ntawm qhov kub thiab txias siab, lawv tuaj yeem tsoo ib qho ntawm thawj zaug ntawm lwm qhov ntawm lub cav combustion sab hauv.

Kev tawg ntawm lub tog raj kheej taub hau

Piston kub

• Txuas hlua khoov. Ntawm no, zoo ib yam, nyob rau hauv cov xwm txheej ntawm kev tawg, nws lub cev tuaj yeem hloov nws cov duab.
• Kev kub hnyiab ntawm cov phaj valve. Cov txheej txheem no tshwm sim sai heev thiab muaj qhov tshwm sim tsis zoo.

Qhov tshwm sim ntawm detonation

Piston burnout

Raws li tuaj yeem pom los ntawm daim ntawv teev npe, qhov tshwm sim ntawm cov txheej txheem detonation yog qhov loj tshaj plaws, yog li ntawd, lub tshuab hluav taws xob sab hauv yuav tsum tsis txhob raug tso cai ua haujlwm hauv nws cov xwm txheej, raws li kev kho yuav tsum tau ua kom sai li sai tau.

Yuav ua li cas tshem tawm detonation thiab txoj kev tiv thaiv

Qhov kev xaiv ntawm detonation tshem tawm txoj kev nyob ntawm seb yog vim li cas uas ua rau cov txheej txheem no. Qee zaum, txhawm rau tshem tawm nws, koj yuav tsum ua ob lossis ntau qhov kev ua. Feem ntau, cov txheej txheem ntawm kev sib ntaus sib tua detonation yog:

• Kev siv roj nrog cov tsis pom zoo los ntawm tus kws tsim tsheb. uas yog, nws txhawj txog tus lej octane (koj tsis tuaj yeem kwv yees nws). koj yuav tsum tau refuel nyob rau hauv pov thawj chaw nres tsheb roj thiab tsis sau ib tug surrogate rau hauv lub tank. Los ntawm txoj kev, txawm tias ib co high-octane roj av muaj roj (propane los yog lwm yam), uas unscrupulous manufacturers tso rau hauv nws. Qhov no nce nws tus lej octane, tab sis tsis ntev, yog li sim ua kom zoo roj rau hauv koj lub tsheb tank.
• Nruab ib lub ignition tom qab. Raws li kev txheeb cais, ignition teeb meem yog feem ntau ua rau detonation.
• decarbonize, ntxuav lub combustion engine, uas yog, ua kom lub ntim ntawm lub combustion chamber li qub, tsis muaj carbon deposits thiab av. Nws yog qhov ua tau los ua koj tus kheej hauv chav nres tsheb, siv cov cuab yeej tshwj xeeb rau decarbonizing.
• tshuaj xyuas lub cav txias system. uas yog, xyuas qhov xwm txheej ntawm lub tshuab hluav taws xob, cov kav dej, cov cua lim (hloov nws yog tias tsim nyog). kuj tsis txhob hnov ​​​​qab xyuas cov qib antifreeze thiab nws cov mob (yog tias nws tsis tau hloov mus ntev, ces nws yog qhov zoo dua los hloov nws).
• Diesels yuav tsum raug teeb tsa cov roj txhaj tshuaj ua ntej lub kaum sab xis.
• khiav lub tsheb kom raug, tsis txhob tsav lub zog siab ntawm qis ceev, tsis txhob rov qab kho lub computer kom txuag tau roj.

Raws li kev tiv thaiv kev tiv thaiv, nws tuaj yeem raug qhia kom saib xyuas qhov xwm txheej ntawm lub tshuab hluav taws xob sab hauv, ntxuav nws ib ntus, hloov cov roj hauv lub sijhawm, ua kom decarbonization, thiab tiv thaiv kom tsis txhob kub dhau. Ib yam li ntawd, tswj cov cua txias thiab nws cov khoom nyob rau hauv qhov zoo, hloov lub lim thiab antifreeze nyob rau hauv lub sij hawm. Kuj ib qho ua kom yuam kev yog tias ib ntus koj yuav tsum cia lub tshuab hluav taws xob sab hauv khiav ntawm kev kub ceev (tab sis tsis muaj fanaticism!), koj yuav tsum ua qhov no hauv nruab nrab iav. Nyob rau tib lub sijhawm, ntau yam ntawm cov av thiab cov khib nyiab ya tawm ntawm lub cav combustion nyob rau hauv lub siab kub thiab load, uas yog, nws yog huv si.

Detonation feem ntau tshwm sim ntawm ICE kub. Tsis tas li ntawd, nws muaj feem ntau ntawm cov motors uas ua haujlwm ntawm qhov tsawg kawg nkaus. Qhov no yog vim lub fact tias lawv muaj ib tug ntau ntawm soot nyob rau hauv lub pistons thiab lub tog raj kheej phab ntsa nrog tag nrho cov kev tshwm sim. Thiab feem ntau lub combustion engine detonates ntawm tsawg speeds. Yog li ntawd, sim ua kom lub cev muaj zog ntawm nruab nrab speeds thiab nrog nruab nrab loads.

Cais, nws yog tsim nyog hais txog lub khob sensor. Lub hauv paus ntsiab lus ntawm nws txoj haujlwm yog ua raws li kev siv cov khoom siv piezoelectric, uas txhais cov kev ua haujlwm ntawm nws mus rau hauv hluav taws xob tam sim no. Yog li ntawd, nws yog qhov yooj yim heev los xyuas nws txoj haujlwm.

Thawj txoj kev - siv lub multimeter ua haujlwm hauv hom ntsuas hluav taws xob tsis kam. Txhawm rau ua qhov no, koj yuav tsum tshem tawm cov nti ntawm lub sensor, thiab txuas lub multimeter probes hloov. Tus nqi ntawm nws qhov tsis kam yuav pom ntawm qhov screen ntawm lub cuab yeej (qhov no, tus nqi nws tus kheej tsis tseem ceeb). Tom qab ntawd, siv tus ciaj ntswj lossis lwm yam khoom hnyav, ntaus DD mounting bolt (txawm li cas los xij, ceev faj, tsis txhob overdo nws!). Yog tias lub sensor ua haujlwm, ces nws yuav pom qhov cuam tshuam raws li kev tawg thiab hloov nws qhov tsis kam, uas tuaj yeem txiav txim los ntawm kev nyeem ntawv ntawm lub cuab yeej. Tom qab ob peb vib nas this, tus nqi kuj yuav tsum rov qab mus rau nws qhov qub. Yog tias qhov no tsis tshwm sim, lub sensor yog faulty.

Ob txoj kev kev tshuaj xyuas yog yooj yim dua. Txhawm rau ua qhov no, koj yuav tsum pib lub tshuab hluav taws xob sab hauv thiab teeb tsa nws qhov nrawm ntawm qhov chaw ntawm 2000 rpm. Qhib lub hood thiab siv tib tus yuam sij los yog ib tug me me rauj ntaus lub sensor mount. Lub sensor ua haujlwm yuav tsum pom qhov no yog qhov tawg thiab tshaj tawm qhov no rau ECU. Tom qab ntawd, chav tswj hwm yuav muab cov lus txib kom txo qhov ceev ntawm lub tshuab hluav taws xob sab hauv, uas tuaj yeem hnov ​​​​los ntawm pob ntseg. Ib yam li ntawd, yog tias qhov no tsis tshwm sim, lub sensor yog faulty. Lub rooj sib txoos no tsis tuaj yeem kho, thiab nws tsuas yog yuav tsum tau hloov tag nrho, hmoov zoo, nws pheej yig. Thov nco ntsoov tias thaum txhim kho lub sensor tshiab ntawm nws lub rooj zaum, nws yog ib qho tsim nyog los xyuas kom meej kev sib cuag zoo ntawm lub sensor thiab nws qhov system. Txwv tsis pub, nws yuav tsis ua haujlwm raug.