{"id":3400,"date":"2025-08-08T02:12:20","date_gmt":"2025-08-08T02:12:20","guid":{"rendered":"https:\/\/3waycatalyst.com\/?p=3400"},"modified":"2025-08-08T03:57:42","modified_gmt":"2025-08-08T03:57:42","slug":"understanding-emission-standards-and-their-impact-on-catalytic-converter-design","status":"publish","type":"post","link":"https:\/\/3waycatalyst.com\/vi\/understanding-emission-standards-and-their-impact-on-catalytic-converter-design\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 Ti\u00eau chu\u1ea9n Kh\u00ed th\u1ea3i v\u00e0 T\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang \u0111\u1ebfn Thi\u1ebft k\u1ebf B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c"},"content":{"rendered":"

Trong th\u1ebf gi\u1edbi \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i,\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c<\/a><\/strong>\u00a0\u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gi\u1ea3m thi\u1ec3u kh\u00ed th\u1ea3i \u0111\u1ed9c h\u1ea1i. Tuy nhi\u00ean, \u0111\u1eb1ng sau m\u1ed7i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c hi\u1ec7u su\u1ea5t cao, th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p, li\u00ean t\u1ee5c ph\u00e1t tri\u1ec3n, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi c\u00e1c quy \u0111\u1ecbnh ng\u00e0y c\u00e0ng nghi\u00eam ng\u1eb7t.\u00a0ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i<\/strong>Nh\u1eefng ti\u00eau chu\u1ea9n n\u00e0y, \u0111\u01b0\u1ee3c c\u00e1c c\u01a1 quan m\u00f4i tr\u01b0\u1eddng tr\u00ean to\u00e0n c\u1ea7u \u00e1p d\u1ee5ng, quy \u0111\u1ecbnh l\u01b0\u1ee3ng ch\u1ea5t \u00f4 nhi\u1ec5m m\u00e0 xe \u0111\u01b0\u1ee3c ph\u00e9p th\u1ea3i ra v\u00e0 t\u1eeb \u0111\u00f3 \u0111\u1ecbnh h\u00ecnh thi\u1ebft k\u1ebf v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o m\u1ed1i quan h\u1ec7 gi\u1eefa\u00a0quy \u0111\u1ecbnh v\u1ec1 kh\u00ed th\u1ea3i<\/strong>\u00a0v\u00e0 thi\u1ebft k\u1ebf b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c, kh\u00e1m ph\u00e1 c\u00e1ch c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn c\u00f4ng ngh\u1ec7 \u0111\u1eb1ng sau c\u00e1c th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu n\u00e0y.<\/p>\n\n\n\n

\"B\u1ed9<\/a>
B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u \u0111a n\u0103ng<\/a><\/figcaption><\/figure>\n\n\n\n

1. Ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao ch\u00fang l\u1ea1i quan tr\u1ecdng?<\/h2>\n\n\n\n

Ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i<\/strong> l\u00e0 nh\u1eefng quy \u0111\u1ecbnh do ch\u00ednh ph\u1ee7 \u0111\u1eb7t ra nh\u1eb1m h\u1ea1n ch\u1ebf l\u01b0\u1ee3ng ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m c\u00f3 h\u1ea1i m\u00e0 xe c\u1ed9 \u0111\u01b0\u1ee3c ph\u00e9p th\u1ea3i ra kh\u00ed quy\u1ec3n. Nh\u1eefng quy \u0111\u1ecbnh n\u00e0y \u0111\u00e3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng trong cu\u1ed9c chi\u1ebfn ch\u1ed1ng l\u1ea1i \u00f4 nhi\u1ec5m kh\u00f4ng kh\u00ed<\/strong> v\u00e0 nh\u1eefng t\u00e1c \u0111\u1ed9ng li\u00ean quan \u0111\u1ebfn s\u1ee9c kh\u1ecfe, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c b\u1ec7nh v\u1ec1 \u0111\u01b0\u1eddng h\u00f4 h\u1ea5p, kh\u00f3i b\u1ee5i v\u00e0 m\u01b0a axit. C\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m ch\u00ednh<\/strong> m\u1ee5c ti\u00eau c\u1ee7a c\u00e1c ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i bao g\u1ed3m oxit nit\u01a1 (NOx)<\/strong>, hydrocarbon (HC)<\/strong>, V\u00e0 cacbon monoxit (CO)<\/strong>\u0110\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 diesel, tr\u1ecdng t\u00e2m b\u1ed5 sung \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o vi\u1ec7c gi\u1ea3m v\u1eadt ch\u1ea5t d\u1ea1ng h\u1ea1t (PM)<\/strong> V\u00e0 NOx<\/strong> kh\u00ed th\u1ea3i.<\/p>\n\n\n\n

C\u00e1c C\u01a1 quan B\u1ea3o v\u1ec7 M\u00f4i tr\u01b0\u1eddng Hoa K\u1ef3 (EPA)<\/strong> v\u00e0 Ban T\u00e0i nguy\u00ean Kh\u00f4ng kh\u00ed California (CARB)<\/strong> \u0111\u1eb7t ra m\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n nghi\u00eam ng\u1eb7t nh\u1ea5t v\u1ec1 kh\u00ed th\u1ea3i xe c\u1ed9. \u1ede Ch\u00e2u \u00c2u, Ti\u00eau chu\u1ea9n Euro<\/strong> (t\u1eeb Euro 1 \u0111\u1ebfn Euro 7 s\u1eafp t\u1edbi) th\u1eaft ch\u1eb7t gi\u1edbi h\u1ea1n kh\u00ed th\u1ea3i c\u1ee7a xe c\u1ed9, trong khi Trung Qu\u1ed1c<\/strong> c\u0169ng \u0111\u00e3 x\u00e2y d\u1ef1ng c\u00e1c ti\u00eau chu\u1ea9n nghi\u00eam ng\u1eb7t ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng l\u1ec7 to\u00e0n c\u1ea7u. Nh\u1eefng quy \u0111\u1ecbnh n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c c\u1ee7a kh\u00ed th\u1ea3i xe c\u1ed9<\/strong> v\u1ec1 c\u1ea3 s\u1ee9c kh\u1ecfe c\u1ed9ng \u0111\u1ed3ng v\u00e0 m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n

2. Vai tr\u00f2 c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c trong ki\u1ec3m so\u00e1t kh\u00ed th\u1ea3i<\/h2>\n\n\n\n

M\u1ed8T b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c<\/strong> l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a m\u1ed9t chi\u1ebfc xe h\u1ec7 th\u1ed1ng x\u1ea3<\/strong>, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng kh\u00ed th\u1ea3i \u0111\u1ed9c h\u1ea1i b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i kh\u00ed \u0111\u1ed9c th\u00e0nh c\u00e1c ch\u1ea5t \u00edt \u0111\u1ed9c h\u1ea1i h\u01a1n. N\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y th\u00f4ng qua m\u1ed9t lo\u1ea1t ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc<\/strong> \u0111\u01b0\u1ee3c t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i b\u1edfi kim lo\u1ea1i qu\u00fd<\/strong> gi\u1ed1ng b\u1ea1ch kim<\/strong>, paladi<\/strong>, V\u00e0 rhodi<\/strong>. C\u00e1c ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m ch\u00ednh\u2014cacbon monoxit<\/strong>, hydrocarbon<\/strong>, V\u00e0 oxit nit\u01a1<\/strong>\u2014\u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh kh\u00ed cacbonic<\/strong>, N\u01b0\u1edbc<\/strong>, V\u00e0 nit\u01a1<\/strong>, \u00edt g\u00e2y h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng h\u01a1n.<\/p>\n\n\n\n

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ho\u1ea1t \u0111\u1ed9ng song song v\u1edbi\u00a0b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 (ECU)<\/strong>, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u\u00a0t\u1ef7 l\u1ec7 kh\u00f4ng kh\u00ed-nhi\u00ean li\u1ec7u<\/strong>\u00a0\u0111\u1ec3 \u0111\u1ed1t ch\u00e1y hi\u1ec7u qu\u1ea3. Nh\u1eefng ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc n\u00e0y, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong th\u1eddi hi\u1ec7n \u0111\u1ea1i\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u (TWC)<\/a><\/strong>, l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u ng\u00e0y c\u00e0ng nghi\u00eam ng\u1eb7t\u00a0ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i<\/strong>\u00a0do c\u00e1c c\u01a1 quan m\u00f4i tr\u01b0\u1eddng \u0111\u1eb7t ra.<\/p>\n\n\n\n

\"Mitsubishi-Asx-1.8L-Diesel-B\u1ed9<\/a>
Mitsubishi-Asx-1.8L-Diesel-B\u1ed9 l\u1ecdc h\u1ea1t-B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c<\/a><\/figcaption><\/figure>\n\n\n\n

3. T\u00e1c \u0111\u1ed9ng c\u1ee7a Ti\u00eau chu\u1ea9n Kh\u00ed th\u1ea3i \u0111\u1ebfn Thi\u1ebft k\u1ebf B\u1ed9 chuy\u1ec3n \u0111\u1ed5i X\u00fac t\u00e1c<\/h2>\n\n\n\n

B\u1eb0NG quy \u0111\u1ecbnh v\u1ec1 kh\u00ed th\u1ea3i<\/strong> tr\u1edf n\u00ean nghi\u00eam ng\u1eb7t h\u01a1n, thi\u1ebft k\u1ebf v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c<\/strong> \u0111\u00e3 ph\u00e1t tri\u1ec3n \u0111\u00e1ng k\u1ec3. M\u1ed9t trong nh\u1eefng t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp nh\u1ea5t c\u1ee7a vi\u1ec7c th\u1eaft ch\u1eb7t ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i l\u00e0 nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng v\u1ec1 c\u00e1c bi\u1ec7n ph\u00e1p hi\u1ec7u qu\u1ea3 h\u01a1n h\u1ec7 th\u1ed1ng x\u1eed l\u00fd sau<\/strong> c\u00f3 th\u1ec3 x\u1eed l\u00fd \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 \u00f4 nhi\u1ec5m cao h\u01a1n trong kh\u00ed th\u1ea3i. K\u1ef9 s\u01b0<\/strong> \u0111\u00e3 ph\u1ea3n \u1ee9ng b\u1eb1ng c\u00e1ch ph\u00e1t tri\u1ec3n c\u00f4ng th\u1ee9c ch\u1ea5t x\u00fac t\u00e1c ph\u1ee9c t\u1ea1p h\u01a1n<\/strong>, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/p>\n\n\n\n

V\u00ed d\u1ee5, nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng v\u1ec1 vi\u1ec7c gi\u1ea3m\u00a0Kh\u00ed th\u1ea3i NOx<\/strong>\u00a0\u0111\u00e3 d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a\u00a0kh\u1eed x\u00fac t\u00e1c ch\u1ecdn l\u1ecdc (SCR)<\/strong>\u00a0h\u1ec7 th\u1ed1ng v\u00e0 ti\u00ean ti\u1ebfn\u00a0b\u1ed9 l\u1ecdc h\u1ea1t diesel (DPF)<\/a><\/strong>. C\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng song song v\u1edbi\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c<\/strong>, \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c xe ch\u1ea1y b\u1eb1ng d\u1ea7u diesel \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n kh\u00ed th\u1ea3i nghi\u00eam ng\u1eb7t h\u01a1n. S\u1ef1 ra \u0111\u1eddi c\u1ee7a\u00a0Euro6<\/strong>\u00a0V\u00e0\u00a0Euro 7<\/strong>\u00a0c\u00e1c quy \u0111\u1ecbnh \u0111ang th\u00fac \u0111\u1ea9y s\u1ef1 \u0111\u1ed5i m\u1edbi h\u01a1n n\u1eefa trong thi\u1ebft k\u1ebf b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, d\u1eabn \u0111\u1ebfn c\u00e1c gi\u1ea3i ph\u00e1p tinh vi h\u01a1n \u0111\u1ec3 ki\u1ec3m so\u00e1t kh\u00ed th\u1ea3i \u1edf nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh \u0111\u1ed9ng c\u01a1 kh\u00e1c nhau.<\/p>\n\n\n\n

4. Th\u00e0nh ph\u1ea7n b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c: Kim lo\u1ea1i qu\u00fd v\u00e0 vai tr\u00f2 c\u1ee7a ch\u00fang<\/h2>\n\n\n\n

C\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c hi\u1ec7u qu\u1ea3 nh\u1ea5t ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o kim lo\u1ea1i qu\u00fd<\/strong> ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ea1ch kim (Pt)<\/strong>, paladi (Pd)<\/strong>, V\u00e0 rhodi (Rh)<\/strong>. Nh\u1eefng kim lo\u1ea1i n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 ch\u1ea5t x\u00fac t\u00e1c<\/strong> gi\u00fap t\u0103ng t\u1ed1c c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc c\u1ea7n thi\u1ebft \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i kh\u00ed \u0111\u1ed9c h\u1ea1i th\u00e0nh c\u00e1c ch\u1ea5t \u00edt \u0111\u1ed9c h\u1ea1i h\u01a1n. Sau \u0111\u00e2y l\u00e0 c\u00e1ch ch\u00fang \u0111\u00f3ng g\u00f3p:<\/p>\n\n\n\n