Sistemụ EGR
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Sistemụ EGR

21.07.2022 /

Emepụtara sistemu Gas Recirculation (EGR) iji kwalite ogo gburugburu ebe obibi nke injin ụgbọ ala. Ojiji ya nwere ike ibelata mkpokọta nitrogen oxides n'ime ikuku ikuku. A naghị ewepụ nke ikpeazụ nke ọma site na ndị ntụgharị catalytic na, ebe ọ bụ na ha bụ ihe kachasị egbu egbu na ngwakọta nke gas na-ekpochapụ, a chọrọ iji ngwọta na teknụzụ ndị ọzọ.

Sistemụ EGR

Olee otú sistemụ ahụ si arụ ọrụ

EGR bụ mkpirisi okwu bekee bụ "Exhaust Gas Recirculation" nke sụgharịta dị ka "nkwughachi ikuku gas". Ọrụ bụ isi nke usoro dị otú ahụ bụ ịtụgharị akụkụ nke gas site na ikpochapụ ikuku gaa na ntinye oriri. Nhazi nke nitrogen oxides na-adaba na ọnọdụ okpomọkụ dị n'ime ụlọ combustion nke engine. Mgbe ikuku ikuku sitere na sistemu ikuku na-abanye n'ime usoro oriri, ntinye nke oxygen, nke na-eme ihe dị ka ihe na-akpali akpali n'oge usoro ọkụ ọkụ, na-ebelata. N'ihi ya, okpomọkụ dị n'ime ụlọ ọkụ na-ebelata ma pasent nke nhazi nitrogen oxide na-ebelata.

A na-eji usoro EGR maka mmanụ dizel na mmanụ ụgbọala. Naanị ihe dị iche bụ ụgbọ ala mmanụ ụgbọ ala turbocharged, ebe iji teknụzụ recirculation adịghị arụ ọrụ n'ihi nkọwa nke ụdị ọrụ injin. Na mkpokọta, teknụzụ EGR nwere ike ibelata mkpokọta nitrogen oxide site na 50%. Na mgbakwunye, ihe gbasara nke puru omume nke detonation na-ebelata, oriri mmanụ na-abawanye ụba (ihe fọrọ nke nta ka ọ bụrụ 3%), a na-ejikwa ụgbọ ala mmanụ dizel site na mbelata nke soot na gas na-ekpochapụ.

Sistemụ EGR

Obi nke usoro EGR bụ valvụ recirculation, nke na-achịkwa ntinye nke gas na-ekpochapụ n'ime ebe oriri. Ọ na-arụ ọrụ na oke okpomọkụ ma na-edobe nnukwu ibu. Enwere ike ịmepụta mbelata okpomọkụ nke mmanye, nke na-achọ radiator (cooler) nke etinyere n'etiti usoro ikpochapu na valvụ. Ọ bụ akụkụ nke sistemụ jụrụ oyi nke ụgbọ ala ahụ.

N'ime igwe dizel, valvụ EGR na-emepe n'enweghị ọrụ. N'okwu a, ikuku ikuku na-eme 50% nke ikuku na-abanye n'ime ụlọ ọkụ. Ka ibu ahụ na-abawanye, valvụ ahụ ji nwayọọ nwayọọ mechie. Maka igwe mmanụ ụgbọ ala, usoro mgbasa ozi na-arụkarị ọrụ naanị na ọkara na obere injin na-ebuga ihe ruru 10% nke ikuku ikuku na mkpokọta ikuku.

Gịnị bụ EGR valves

Ugbu a, e nwere ụdị atọ nke valvụ recirculation iyuzucha, nke dị iche na ụdị actuator:

  • Pneumatic. Nke kachasị mfe, mana emebelarị ihe na-eme ihe na-eme ka ikuku ikuku recirculation sistemu. N'ezie, mmetụta dị na valvụ ahụ na-eme site na oghere dị n'ime ihe oriri nke ụgbọ ala.
  • Electropneumatic. A na-achịkwa valve EGR pneumatic site na valvụ solenoid, nke na-arụ ọrụ site na akara sitere na engine ECU dabere na data sitere na ọtụtụ sensọ (nrụgide gas na-ekpo ọkụ na okpomọkụ, ọnọdụ valve, nrụgide oriri na oyi oyi). Ọ na-ejikọ ma na-ewepụ isi iyi na-emeghe ma mepụta naanị ọnọdụ abụọ nke valvụ EGR. N'aka nke ya, enwere ike ịmepụta oghere dị na usoro dị otú ahụ site na mgbapụta mgbapụta dị iche iche.
  • Kọmputa. Ụdị valvụ recirculation a bụ nke injin ụgbọ ala ECU na-achịkwa ozugbo. Ọ nwere ọnọdụ atọ maka njikwa iyuzucha mmiri dị nro. A na-agbanwe ọnọdụ nke valvụ EGR site na magnet na-emeghe ma mechie ya na ngwakọta dị iche iche. Usoro a anaghị eji oghere.
Sistemụ EGR

Ụdị EGR na mmanụ dizel

Igwe mmanụ dizel na-eji ụdị dị iche iche nke ikuku ikuku recirculation nke gas, nke a na-ekpebi mkpuchi ya site na ụkpụrụ gburugburu ebe obibi ụgbọ ala. Enwere ugbu a atọ n'ime ha:

  • Nnukwu nrụgide (dakọtara na Euro 4). Valvụ recirculation na-ejikọta ọdụ ụgbọ mmiri iyuzucha, nke etinyere n'ihu turbocharger, ozugbo na ntinye ihe oriri. Nke a sekit na-eji electro-pneumatic mbanye. Mgbe emechiri trotul ahụ, a na-ebelata nrụgide oriri nke ukwuu, na-ebute oghere dị elu. Nke a na-eme ka mmụba nke ikuku na-ekpochapụ. N'aka nke ọzọ, mmụba ike na-ebelata n'ihi na obere ikuku ikuku na-enyefe n'ime turbine. N'ebe a na-emeghe trotul, usoro ịgbagharị ikuku gas anaghị arụ ọrụ.
  • Obere nrụgide (dakọtara na Euro 5). N'ime atụmatụ a, a na-ejikọta valvụ ahụ na usoro ikpochapu na mpaghara dị n'etiti nzacha na-ekpo ọkụ na muffler, na n'ime usoro oriri - n'ihu turbocharger. N'ihi onyinye a, a na-ebelata okpomọkụ nke gas na-ekpocha ọkụ, a na-ehichapụkwa ha site na adịghị ọcha soot. N'okwu a, ma e jiri ya tụnyere atụmatụ nrụgide dị elu, a na-eme nrụgide na ike zuru oke, ebe ọ bụ na gas dum na-agafe na turbine.
  • Ejikọtara (dakọtara na Euro 6). Ọ bụ ngwakọta nke sekit nrụgide dị elu na nke dị ala, nke ọ bụla nwere valves recirculation nke ya. Na ọnọdụ nkịtị, sekit a na-arụ ọrụ na ọwa nrụgide dị ala, na-ejikọta ọwa nrụgide nrụgide dị elu mgbe ibu na-abawanye.

Ná nkezi, valvụ recirculation gas na-ekpochapụ na-adịru ihe dị ka 100 km, mgbe nke ahụ gasịrị, ọ nwere ike mechie ma daa. N'ọtụtụ oge, ndị ọkwọ ụgbọ ala na-amaghị ihe sistemụ recirculation bụ maka iwepu ha kpamkpam.

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