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International Journal of Automotive Technology 2001;2(2): 63-75. |
| AN EXPLORATORY STUDY OF THC EMISSION REDUCTION TECHNOLOGIES COMPLIANT WITH SULEV REGULATIONS |
| In Tak Kim, Woo Jik Lee, Jong Seok Yoon, Chung Kook Park |
| Hyundai Motors & Kia Motors |
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| ABSTRACT |
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This paper describes the development of THC reduction technologies compliant with SULEV regulations. Technologies embodied by the developmental work include improvement of fuel spray atomization, quick warm-up through coolant control shut off, and acceleration of fuel atomization for the fast rise of cylinder head temp inside the water jacket as well as the improvement of combustion state. The technologies likewise entail reduced HC while operating in lean A/F condition during engine warm-up with the cold lean burn technology, individual cylinder A/F control for improvement of catalytic converting efficiency, after-treatment such as thin-wall catalyst, HC-adsorber and EHC and etc, through vehicle application evaluation in cold start. We carried out an experimental as well as a practical study against SULEV regulations, and the feasibility of adopting these items in vehicle was likewise investigated. |
| Key Words:
SULEV, Coolant control, Air-shrouded injector (ASI), Improved exhaust manifold, Thin-wall catalyst, HC-absorber, Hybrid catalyst, Electrically heated catalyst (EHC) |
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