Injector 20R-5567 - Thermal-Load Optimized Fuel Delivery For Extended C175 Cav Duty Cycles

Feem ntau cov injector specifications pib nrog tus nqi ntws los yog qhov suav, tab sis rau C175 cav tsev neeg, qhov txhais ua haujlwm ciam teb tsis yog siab - nws yog cov thermal load. Lub Injector 20R-5567 yog tsim los ntawm ib qho yooj yim tab sis xav tau kev muaj tiag: thaum lub cav khiav ntawm 90% load rau 18 teev nyob rau ib hnub, lub cev injector dhau los ua lub dab dej kub uas yuav tsum tsis tu ncua tsis kam combustion zog thaum tswj lub sijhawm ua haujlwm sub-millisecond precision. Tsis zoo li cov me me injectors uas muaj qee lub sijhawm thermal spikes, chav tsev no ua haujlwm nyob rau hauv qhov chaw nyob ze qhov kub thiab txias, qhov twg cov khoom nthuav dav, lubricity breakdown, thiab coil resistance drift yog thawj tsis ua hauj lwm tsav tsheb. 20R-5567 hais txog qhov no los ntawm kev rov tsim kho cua sov txoj kev: tooj liab-tungsten alloy ntxig rau hauv lub taub hau lub taub hau uas ua rau cov thermal conductivity nce 38% piv rau cov pa roj carbon monoxide, tshem tawm cov cua sov tawm ntawm lub koob qhia thiab txo qhov kub sib txawv ntawm cov solenoid thiab lub hau. Qhov kev tswj xyuas thermal no txuas ntxiv rau lub tshuab ua haujlwm ruaj khov qhov rais, kom ntseeg tau tias 0.38 hli rab koob nqa tau zoo ib yam txawm tias qhov ntsuas kub ntawm qhov ntsuas kub nce mus txog 105 degree.

Lub 20R-5567 muab ib tug zoo li qub ntws ntawm 590-615 cm³ / 30s ntawm 100 bar, ib tug ntau yam ua tib zoo xaiv kom haum rau cov huab cua tuav peev xwm ntawm lub C175-16 thiab C175-20 engine tsis over-fueling ntawm ncov torque. Nws lub nozzle suav nrog 8 qhov nrog txoj kab uas hla ntawm 0.245 mm, teem rau hauv 2-4-2 staggered qauv uas faib roj rau hauv lub piston lub tais lub squish cheeb tsam thiab re-entrant cheeb tsam ib txhij -ib configuration uas txhim kho soot oxidation los ntawm 9% nyob rau hauv high-steas. koob nqa yog teem ntawm 0.38 mm ± 0.009 mm, nrog lub valve qhib siab ntawm 265 bar thiab ib tug thib ob lub caij nplooj ntoos hlav preload ntawm 50 N. Lub sab hauv to taub yog capped ntawm 2.6 cm³ / min ntawm 1,550 bar, tiav los ntawm ib tug clearance ntawm 3.9 µm ntawm lub koob thiab phau ntawv qhia. Dynamic flow linearity yog khaws cia nyob rau hauv ± 2.4% nyob rau lub sij hawm energizing ntawm 0.4 mus rau 3.1 ms, muab lub ECU nrog ib tug kwv yees roj-rau-lub sij hawm kev sib raug zoo uas yooj yim calibration kho thaum ua hauj lwm ntawm qhov siab lossis nrog sib txawv roj ntom.

Qhov no injector yog hloov ncaj qha rau C175-16 thiab C175-20 cav, feem ntau pom nyob rau hauv ultra-class tsheb thauj khoom (Komatsu 980E, Liebherr T 284), high-speed catamarans, thiab 2.5-3.5 MW generator teeb. Nws kuj haum rau cov kev lag luam uas tau xaiv nyob rau hauv qhov chaw injector bore muaj 152 hli ntxig qhov tob thiab 4.3 hli protrusion. Lub mounting xov yog M12 × 1.5 nrog ib tug clamp torque specification ntawm 60 Nm, thiab lub high-pressure inlet siv M14 × 1.5 cone foob haum. Qhov tseem ceeb, qhov ntev ntawm lub injector yog zoo tib yam rau 349-2522, tab sis nws cov solenoid inductance (2.8 mH) thiab tsis kam (0.80 Ω) txawv, lub ntsiab lus ntawm ECU tsav tsheb yuav tsum sib haum mus rau 20R-5567 cov hluav taws xob profile kom ua tiav qhov qhib qhov hluav taws xob. Rau cov neeg tsav nkoj nrog cov khoom sib xyaw injector, qhov no yog qhov sib txawv tseem ceeb kom tsis txhob cuam tshuam kev teeb tsa.

Nyob rau ntawm lub cav ceev ceev, rab koob kaw tus cwj pwm tuaj yeem ua qhov tsis zoo vim qhov hloov pauv siab hauv cov roj rov qab gallery. Lub 20R-5567 suav nrog lub calibrated damping kab noj hniav - ib tug me me roj-filled chamber nyob rau hauv lub armature phaj- uas exerts ib tug counterforce thaum lub sij hawm kawg ntawm 0.1 hli ntawm koob mus ncig teb chaws, txo qhov kaw nrawm los ntawm 22% thiab tshem tawm qhov thib ob bounce uas ua rau tom qab txhaj tshuaj. Cov nyhuv damping no yog passive, yuav tsum tsis muaj hluav taws xob input, thiab nws cov kev ua tau zoo yog validated tshaj 10 lab cycles nyob rau hauv accelerate lub neej xeem. Qhov ntsuas qhov ncua sij hawm yog 0.38 ms, uas yog 0.04 ms ntev tshaj qhov tsis-damped version tab sis yields 30% txo ntawm lub rooj zaum cuam tshuam quab yuam, ncaj qha cuam tshuam nrog 15% lub rooj zaum ntev dua ua ntej kev yaig cuam tshuam rau tus nqi ntws.

Thaum cov kev ntsuas rov qab los txias yog ib txwm muaj, 20R-5567 qhov chaw ua haujlwm ua haujlwm ua rau cov dej xau kub yog qhov qhia tau tseeb ntawm qhov xwm txheej. Ntawm kev khiav hauj lwm kub (roj ntawm 60-70 degree), ib tug tshiab injector qhia ib tug rov qab ntws ntawm 34-42 cm³ / min. Thaum lub sij hawm, raws li cov koob qhia clearance nce, tus nqi no nce. Kev tsom xam yog pom zoo: yog tias qhov kub rov qab ntws nce ntau dua 8 cm³ / min dhau 2,000-teev lub sijhawm-tsis hais txog tus nqi kiag li{13}} nws qhia qhov nrawm ntawm hnav tus nqi, txawm tias qhov ntws tseem nyob hauv qhov txwv tau. Qhov kev hloov pauv ntawm qhov kev hloov pauv no yog qhov muaj txiaj ntsig ntau dua li kev ntsuas ib zaug thiab tso cai rau kev cob qhia los kwv yees lub neej ntxiv nrog ± 300-teev raug, ua kom muaj sijhawm hloov pauv uas tsis txhob poob qis hauv cov chaw mining tej thaj chaw deb.

❓ 20R-5567 tiv thaiv cov roj uas muaj cov ntsiab lus dej siab (emulsified diesel) li cas hauv thaj chaw marine?
Lub injector's CrAlTiN txheej thiab Inconel nozzle tiv thaiv corrosion los ntawm cov dej hauv roj emulsions txog li 0.2% dej cov ntsiab lus. Tshaj ntawd, cov dej sib cais yuav tsum tau hloov kho dua tshiab; txwv tsis pub, daim ntawv qhia kev tshem tawm tuaj yeem nce li 1 µm ib 1,000 teev vim yog micro-cavitation yaig.

❓ Kuv puas tuaj yeem txuas ntxiv lub sijhawm ua haujlwm los ntawm kev hloov cov tshuaj txhaj tshuaj ntawm lub tog raj kheej kom sib npaug?
Tsis pom zoo rau cov qauv no. Txhua tus injector's ECU coding yog lub tog raj kheej tshwj xeeb, thiab kev sib pauv yuav tsum tau sau. Qhov tseem ceeb tshaj, tus qauv hnav yog nyob ntawm kev thauj khoom, thiab kev sib hloov tsis txo qhov hnav tag nrho - nws tsuas yog rov faib nws, uas yuav ua rau lub ntsej muag tsis ua haujlwm.

❓ Dab tsi yog qhov tshwm sim ntawm kev siv cov khoom siv tooj liab qis dua, thiab kuv tuaj yeem txheeb xyuas qhov tseeb li cas?
Lub gasket tsis zoo (softer lossis thinner) yuav tsis tswj qhov tseeb protrusion tom qab thermal cycling, ua rau cov tshuaj tsuag misalignment. Cov gaskets tiag muaj lub hardness stamp ntawm HV 110 thiab xim ntsuab code ntawm ntug sab hauv. Ib txwm siv lub gasket tshwj xeeb.

❓ Lub twj tso kua mis dhau qhov kev sim ntsuas lub rooj ntev zaum tab sis qhia tau hais tias tsis muaj hluav taws xob tsis sib xws ntawm lub cav -Kuv yuav tsum kuaj dab tsi ntxiv?
Kev tsis sib haum xeeb feem ntau yog hluav taws xob: xyuas cov pins txuas rau fretting corrosion (pom zoo li cov hmoov dub), ntsuas cov hlua tiv thaiv (yuav tsum qis dua 0.5 Ω ib xaim), thiab xyuas ECU tus neeg tsav tsheb injector rov qab mus rau xoom voltage ntawm pulses. Ib qho hluav taws xob seem ntawm 1.5 V tuaj yeem ua rau qhib ntxov ntxov.

❓ Puas yog nws tsim nyog los hloov cov kab hluav taws xob siab ferrule txhua lub sijhawm tshem tawm cov tshuaj txhaj tshuaj?
Yog lawm. Lub ferrule yog tsim los rau ib leeg-siv compression; reusing nws txo cov sealing siab thiab ua rau micro-leaks uas tuaj yeem ua rau cov xov injector inlet tsis pub dhau 500 teev. Qhov no yog qhov yuav tsum tau hloov pauv raws li phau ntawv qhia kev pabcuam.

❓ Yuav ua li cas kuv txhais ib tug maj mam txo nyob rau hauv static flow yam tsis muaj ib tug sib raug nce nyob rau hauv rov qab flow?
Cov qauv no taw qhia rau nozzle qhov coking, tsis yog txhua yam hnav. Siv cov txheej txheem ntxuav ntawm lub cav nrog cov tshuaj ntxuav kom huv, lossis tshem tawm cov tshuaj tua kab mob rau kev ntxuav ultrasonic. Yog tias cov dej ntws rov qab mus rau hauv 2% ntawm nominal, lub injector tuaj yeem xa rov qab mus rau qhov kev pabcuam yam tsis tau ua ntxiv.