ʻO ke apo piston kekahi o nā ʻāpana koʻikoʻi o ka ʻenekini. Pono nā mea o ke apo piston e kūpono i ka ikaika, ka paʻakikī, ka elasticity a me ka pale ʻana i ka luhi, ke kūpaʻa maikaʻi loa, ka pale wela a me ka pale ʻana i ka corrosion. Me ka hoʻomohala ʻana o nā ʻenekini hou i ka wikiwiki kiʻekiʻe, ka ukana kiʻekiʻe, a me nā haʻahaʻa haʻahaʻa, ʻoiai ke piʻi aʻe nei nā koi no nā mea kani piston, ʻoi aku ka kiʻekiʻe o ka mālama ʻana i ka ʻili. ʻOi aku ka nui o nā ʻenehana lapaʻau wela hou Ua hoʻohana ʻia a hoʻohana ʻia paha i ka mālama wela o nā apo piston, e like me ka ion nitriding, surface ceramics, nanotechnology, etc.

ʻO ka lāʻau piston ring immersion ceramic treatment he haʻahaʻa haʻahaʻa plasma chemical vapor deposition technology (PCVD no ka pōkole). Hoʻoulu ʻia kahi kiʻiʻoniʻoni seramika me ka mānoanoa o kekahi mau micrometers ma ka ʻili o ka substrate metala. I ka manawa like i ka wā e komo ai ka ceramic i loko o ka ʻili metala, komo pū nā ion metala i ka ceramic ʻO ke kiʻiʻoniʻoni e komo i loko a hana i ka diffusion ʻelua ala, lilo i "cermet composite film". ʻO ka mea kūikawā, hiki i ke kaʻina hana ke ulu i ka mea metala composite ceramic ma luna o kahi substrate metala i paʻakikī i nā mea semiconductor e like me ka chromium e laha i loko.

ʻO kēia "metal ceramic composite film" nā hiʻohiʻona penei:

1. Ke ulu nei ma kahi haʻahaʻa haʻahaʻa ma lalo o 300 ℃ me ka ʻole o ka hopena ʻino i ke apo piston;

2. ʻO ka metala ma luna o ka ʻili o ke apo piston e hoʻopuehu i ʻelua ala me ka boron nitride a me ka cubic silicon nitride i loko o kahi mokuʻāina plasma vacuum, e hana ana i kahi mea hana me ka gradient gradient, no laila ua hui pū ʻia;

3. No ka mea, ʻo ke kiʻi ʻoniʻoni ʻeleʻele a me ka metala he mea hana oblique gradient, ʻaʻole wale ia e hana i ke kuleana i ka hoʻopaʻa paʻa ʻana i ka papa hoʻololi, akā hoʻololi pū i ka ikaika o ka lihi pili ceramic, hoʻomaikaʻi i ke kūpaʻa kūlou, a hoʻomaikaʻi nui i ka ʻili. ka paakiki a me ka paakiki o ke apo;

4. ʻOi aku ka maikaʻi o ke ana wela kiʻekiʻe;

5. Hoʻonui i ka mana antioxidant.

No ka mea he hana hoʻomaʻamaʻa ponoʻī ka kiʻiʻoniʻoni seramika, hiki i ke apo piston i hoʻopili ʻia me ke apo piston seramika ke hōʻemi i ka coefficient friction o ka mīkini e 17% 30%, a ua hoʻemi ʻia ka nui o ka lole ma waena o ia mea a me ka hui friction e 2 / /5 1/2, a hiki ke hoemi nui ia. ʻO ka haʻalulu a me ka walaʻau. I ka manawa like, ma muli o ka hana hoʻopaʻa maikaʻi ma waena o ke kiʻi ceramic a me ka liner cylinder engine, ua emi pū ka leakage ea o ka piston e 9.4%, a hiki ke hoʻonui ʻia ka mana engine e 4.8% 13.3%. A e hoola wahie 2.2% 22.7%, engine aila 30% 50%.