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Technology for Reducing Exhaust Gas Emissions in Zero Level Emission Vehicles(ZLEV)
Technical Paper
1999-01-0772
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
ZLEV was accomplished by applying the Three-Stage Emission Management System, utilizing ultra-precise combustion and exhaust gas conversion control technology, and dividing the operation into three-stages of just after engine start, the warm-up stage, and normal running. These individual component technologies include improving engine combustion (high swirl combustion by variable valve timing and lift) and performing fuel control optimization during engine startup to reduce unburned HC emission, quick catalyst activation (engine control and catalyst improvements), HC adsorption of a hybrid catalyst (catalyst improvement and desorption conversion control), and high precision air-fuel ratio feed back control (catalyst condition predictive control, and others).
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Kishi, N., Kikuchi, S., Suzuki, N., and Hayashi, T., "Technology for Reducing Exhaust Gas Emissions in Zero Level Emission Vehicles(ZLEV)," SAE Technical Paper 1999-01-0772, 1999, https://doi.org/10.4271/1999-01-0772.Also In
References
- Kishi Noriyuki et. al. Development of the High Performance L4 Engine ULEV System SAE 980415
- Inoue Kazuo et. al. Newly developed Variable-Valve-Lift and -Timing Mechanism SAE 890675
- Kishi Noriyuki et. al. Development of the Ultra Low Heat Capacity Exhaust Manifold for ULEV SAE 980937
- Kikuchi Shinichi et. al. High Cell Concentration and Thin Wall Substrate for Higher Conversion Ratio Catalyst SAE 1999-01-0268
- Naka Takahiro et. al. Investigation of HC Trap Technique with the High Heat Resistance Adsorber JSAE 980937
- Hasegawa Yusuke et. al. Individual Cylinder Air-Fuel Ratio Feedback Control Using Observer SAE 940376
- Maki Hidetaka et. al. Real Time Engine Control Using STR in Feedback System SAE 950007