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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 warn-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.

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ABSTRACT

1.INTRODUCTION (Noriyuki et al., 1999; Akira et al., 1998)

2.RESULTS AND DISCUSSION

3.CONCLUSION

ACKNOWLEDGMENT

REFERENCES

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UCI(KEPA) : I410-ECN-0101-2009-556-013996881