Camshaft udindo sensa, ntchito zake mu injini kuyaka mkati

Ma injini amakono ali ndi mapangidwe ovuta kwambiri ndipo amawongoleredwa ndi gawo lamagetsi (ECU) lomwe limalandira chidziwitso kuchokera ku masensa. Sensa iliyonse imayang'anira magawo ena omwe akuwonetsa ntchito ya injini pakali pano, ndikutumiza chidziwitso ku ECU. M'nkhaniyi, tiona chimodzi mwa zigawo zofunika kwambiri za dongosolo kasamalidwe injini - camshaft udindo sensa (DPRS).

Kodi camshaft position sensor ndi chiyani

DPRV imatanthauza camshaft position sensor. Mayina ena: Sensa ya Hall, sensor gawo kapena CMP (Chidule cha Chingerezi). Kuchokera ku dzinali zikuwonekeratu kuti ikukhudzidwa ndi ntchito ya makina ogawa gasi. Molondola, makinawa amawerengera jekeseni yoyenera yamafuta ndi nthawi yoyatsira kutengera zomwe zidachitika.

Sensa iyi imagwiritsa ntchito voteji yolumikizira - 5V, ndipo cholumikizira chake ndi sensa ya Hall. Sizidziwa nthawi ya jakisoni kapena kuyatsa, koma zimangopereka chidziwitso cha nthawi yomwe pisitoni ifika ku TDC mu silinda yoyamba. Kutengera ndi datayi, nthawi ndi nthawi ya jakisoni zimawerengedwa.

Pantchito yake, DPRV imalumikizidwa bwino ndi crankshaft position sensor (DPKV), yomwe imayang'aniranso ntchito yoyenera yamagetsi. Ngati pazifukwa zina vuto la camshaft sensa ikuchitika, ndiye mfundo crankshaft sensa adzaganiziridwa. Chizindikiro cha DPKV ndichofunika kwambiri pakugwiritsa ntchito poyatsira ndi jekeseni, popanda izo, injini sizingagwire ntchito.

DPRV imagwiritsidwa ntchito m'mainjini onse amakono, kuphatikiza ma injini oyatsira mkati okhala ndi nthawi yosinthika ya valve. Kutengera kapangidwe ka injini, imayikidwa pamutu wa silinda.

Hall effect ndi mapangidwe a DPRV

Monga tanena kale, sensor imagwira ntchito pa Hall. Zotsatirazi zidapezeka m'zaka za zana la 19 ndi wasayansi wa dzina lomweli. Iye adawona kuti ngati chiwongolero chachindunji chikudutsa mu mbale yopyapyala ndikuyikidwa m'munda wa zochita za maginito osatha, ndiye kuti kusiyana komwe kungapangidwe kumapangidwa kumapeto kwake. Izi zikutanthauza kuti pansi pa mphamvu ya maginito induction, ma elekitironi ena amapatutsidwa ndikupanga magetsi ang'onoang'ono m'mphepete mwa mbale (Hall voltage). Amagwiritsidwa ntchito ngati chizindikiro.

DPRV imapangidwa mwanjira yomweyo, koma mwa mawonekedwe abwino. Lili ndi maginito okhazikika ndi semiconductor yomwe zikhomo zinayi zimagwirizanitsidwa. Chizindikirocho chimadyetsedwa ndi kulowetsedwa kwa dera lophatikizika, komwe limakonzedwa ndikudyetsedwa kwa olumikizana nawo a sensor, omwe ali panyumba ya sensor. Thupi lokha limapangidwa ndi pulasitiki.

Momwe camshaft position sensor imagwirira ntchito

Disiki yoyendetsa (impulse gudumu) imayikidwa pa camshaft kuchokera kumbali yotsutsana ndi DPRV. Komanso, pali mano apadera kapena ma protrusions pa camshaft drive disk. Pamene ma protrusions awa akudutsa mu sensa ya DPRV, imapanga chizindikiro cha digito cha mawonekedwe apadera, omwe amasonyeza kupwetekedwa kwamakono muzitsulo.

M'pofunika kuti tidziwe bwino ntchito camshaft sensa molondola molumikizana ndi DPKV. Kusintha kuwiri kwa crankshaft kumagwirizana ndi kusintha kumodzi kwa camshaft. Ichi ndi chinsinsi cha kalunzanitsidwe wa jekeseni ndi poyatsira machitidwe. M'mawu ena, DPRV ndi DPKV amasonyeza mphindi ya psinjika sitiroko mu yamphamvu woyamba.

Crankshaft drive disc ili ndi mano 58, kotero podutsa m'dera lomwe mano awiri akusowa kudzera mu sensa ya crankshaft, makinawo amawunika ma sign kuchokera ku DPRV ndi DPKV ndikuzindikira nthawi ya jekeseni mu silinda yoyamba. Pambuyo pa mano 30, jekeseni imapezeka, mwachitsanzo, mu silinda yachitatu, ndiyeno yachinayi ndi yachiwiri. Umu ndi momwe kulunzanitsa kumagwirira ntchito. Zizindikiro zonsezi ndi ma pulses ndipo zimawerengedwa ndi injini yolamulira. Amatha kuwoneka pa oscillogram.

Basic sensor malfunctions

Ziyenera kunenedwa nthawi yomweyo kuti ngati camshaft sensor ikulephera, injiniyo idzapitiriza kuthamanga ndikuyamba, koma mochedwa.

Kulephera kwa DPRV kumatha kuwonetsedwa ndi izi:

• kuchuluka kwamafuta chifukwa cha kusalumikizana kwa jekeseni;
• galimoto ikugwedezeka ndikutaya mphamvu;
• kutayika kwakukulu kwa mphamvu, galimoto silingafulumire;
• injini sichimayamba nthawi yomweyo, koma ndi kuchedwa kwa masekondi 2-3 kapena masitolo;
• dongosolo poyatsira ntchito ndi zidutsa;
• kompyuta yomwe ili pa board imapereka cholakwika, kuwala kwa Check Engine kuyatsa.

Zizindikirozi zingasonyeze kuti RPP sikugwira ntchito bwino, koma ingasonyezenso mavuto ena. M'pofunika kuchita diagnostics mu utumiki.

Zifukwa za kulephera kwa DPRV:

• kukhudzana ndi / kapena kulephera kwa waya;
• pakhoza kukhala chip kapena kupindika pa protrusion ya disk ndi mano, chifukwa chomwe sensor imawerenga deta yolakwika;
• kuwonongeka kwa sensa yokha.

Sensa yokhayokha nthawi zambiri imalephera.

Sensor diagnostic njira

Monga sensa ina iliyonse ya hall effect, sensor ya camshaft sikhoza kuyesedwa poyesa magetsi pamapini ndi multimeter. Chithunzi chathunthu cha ntchito yake chikhoza kupezeka pochiyang'ana ndi oscilloscope. Mawonekedwe amtunduwu amawonetsa ma pulses ndi ma dips. Muyeneranso kukhala ndi chidziwitso ndi chidziwitso kuti muwerenge data ya waveform. Izi zikhoza kuchitidwa ndi katswiri wodziwa bwino pa siteshoni kapena malo othandizira.

Ngati kulephera kuzindikirika, sensa imasinthidwa ndi yatsopano, kukonza sikuperekedwa.

DPRV imagwira ntchito yofunikira pakuyatsira ndi jekeseni. Kulephera kwake kumabweretsa mavuto pakugwira ntchito kwa injini. Zizindikiro zikadziwika, ndi bwino kuti adziwe ndi akatswiri oyenerera.