Viscosity nke mmanụ engine - anyị na-ekpebi na-enweghị nsogbu
Ihe
Ịhọrọ mmanu maka injin ụgbọ ala gị adịghị esi ike ma ọ bụrụ na ị chọpụta ihe viscosity nke mmanụ engine bụ na ụfọdụ akụkụ ya ndị ọzọ. Onye ọkwọ ụgbọ ala ọ bụla nwere ike ịghọta okwu a.
Mmanụ viscosity - ihe ọ bụ?
Mmiri mmiri a na-arụ ọtụtụ ọrụ dị mkpa nke na-eme ka arụ ọrụ engine rụọ ọrụ: iwepụ ngwaahịa ndị na-eyi uwe, na-eme ka ihe ngosi kachasị mma nke cylinder siri ike, mmanu nke ihe mating. N'iburu n'uche na ọnọdụ okpomọkụ nke arụ ọrụ nke ike nke ụgbọ ala ọgbara ọhụrụ dị nnọọ obosara, ọ na-esiri ndị na-emepụta ihe ike ịmepụta ihe "dị mma" maka moto.
Ma ha nwere ike ịmepụta mmanụ ndị na-enyere aka iji nweta arụmọrụ engine kachasị mma, ebe ọ na-eme ka ọ ghara ịdị na-arụ ọrụ ya. Ihe ngosi kachasị mkpa nke mmanụ engine ọ bụla bụ klas viscosity ya, nke na-ekpebi ikike nke ihe mejupụtara ya iji nọgide na-enwe mmiri mmiri, nke fọdụrụ n'elu akụkụ nke ike. Nke ahụ bụ, ọ bụ iji mara ihe viscosity na-awụsa engine mmanụ n'ime esịtidem combustion engine, na agaghịkwa na-echegbu onwe ya banyere ya nkịtị ọrụ.
Dị ike na kinematic viscosity nke engine mmanụ
American Union of Automotive Engineers SAE ewepụtala usoro doro anya nke na-ewepụta akara viscosity maka mmanụ moto. Ọ na-eburu n'uche ụdị viscosity abụọ - kinematic na ike. A na-atụ nke mbụ na capillary viscometers ma ọ bụ (nke a na-ahụkarị) na centistokes.
Kinematic viscosity na-akọwa mmụba ya na okpomọkụ dị elu na nke nkịtị (100 na 40 degrees Celsius, n'otu n'otu). Ma viscosity dị ike, nke a na-akpọkwa zuru oke, na-egosi ike nguzogide e guzobere n'oge mmegharị nke mmiri mmiri abụọ nke 1 centimita kewapụrụ na ibe ya na ọsọ 1 cm / s. A na-edobe ebe oyi akwa nke ọ bụla ruru 1 cm. A na-atụ ya na viscometers ntụgharị.
Kedu ka esi achọpụta viscosity mmanụ engine dị ka ọkọlọtọ SAE si dị?
Usoro a anaghị edobe oke mma nke mmanu mmanu. N'ikwu ya n'ụzọ ọzọ, viscosity index nke engine mmanụ enweghị ike inye onye ọkwọ ụgbọ ala ozi doro anya banyere ihe kpọmkwem mmiri mmiri kacha mma maka ya iji jupụta na engine nke "ịnyịnya ígwè" ya. Ma akara mkpụrụedemede ma ọ bụ akara dijitalụ nke ihe mejupụtara SAE na-akọwa okpomọkụ ikuku mgbe enwere ike iji mmanụ mee ihe, yana oge eji ya eme ihe.
Ịchọpụta viscosity nke mmanụ engine dị ka SAE adịghị esi ike. A na-ede mmanụ mmanu ihu igwe niile ka ndị a - SAE 0W-20, ebe:
- nọmba 20 bụ ihe na-egosi viscosity dị elu nke okpomọkụ nke ihe mejupụtara;
- akwụkwọ ozi Bekee W "na-enye ikike" maka iji mmanụ eme ihe n'oge oyi;
- nọmba 0 na-ekpebi uru okpomọkụ kachasị dị ala nke a na-ahapụ ya ka ịmalite engine ahụ ruo -40 Celsius.
Nkewa nke mmanụ moto site viscosity maka oge usoro bụ ọbụna mfe. Oge okpomọkụ dị ka SAE 50, ndị oyi - SAE 20W.
Na omume, a na-ahọrọ klaasị SAE dabere na nkezi oge okpomọkụ oyi na-ahụkarị maka mpaghara ebe eji ụgbọ ala. Ndị ọkwọ ụgbọ ala Russia na-ahọrọkarị ngwaahịa nwere ndeksi 10W-40, n'ihi na ọ kacha mma maka ịrụ ọrụ na okpomọkụ ruo ogo -25. Na ozi kachasị zuru ezu na nrube isi nke otu viscosity ụlọ na klas mba ụwa dị na tebụl viscosity mmanụ moto. Ịchọta ya na ịntanetị adịghị esi ike ma ọlị.
Na mgbakwunye na nhazi ọkwa mmanụ a kọwara site na viscosity, a na-ekewa ha dịka akara ACEA na API. Ha na-akọwapụta mmanụ mmanu moto n'ụzọ dị mma, mana anyị ga-ekwu maka nke a na ihe ọzọ na viscosity nke lubricants maka injin ụgbọ ala.
