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Development of High-Performance and Low-Emission Gasoline Engine
Technical Paper
2008-01-0608
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Honda has developed a new 2.4 L engine that clears the U.S. SULEV (Super Ultra Low Emission Vehicle) emissions regulations. The new engine incorporates a unique VTEC mechanism (Variable valve Timing and lift Electronic Control system: It is the mechanism which performs proper use of the valve rocker arms driven by the cams of the different characteristic by the connection or separation of internal organs pistons by oil pressure control.), an integrated exhaust manifold / cylinder head, and a layout featuring a close-coupled catalyst converter to significantly increase power against the previous model, while maintaining that model's emissions performance. A mechanism enabling deactivation of one valve on the exhaust side has been employed in the new VTEC system to reduce emissions and increase low-speed torque. One-valve operation during warm-up from a cold start promotes after-burn of the HC component of the feed gases by increasing the flow motion of the exhaust gas, resulting in a significant reduction of HC emissions. In addition, one-valve operation at low engine speeds when there is a low exhaust gas flow reduces the level of exhaust blow-back into the cylinders caused by exhaust interference, increasing low-speed torque. On the inlet side, a VTEC mechanism has been employed which, in combination with VTC (Variable Timing Control), enables optimum valve timings to be set for the low- and high-speed sides. Decreased intake and exhaust resistance and an increased compression ratio in the new i-VTEC (intelligent-VTEC: it consists of VTEC and VTC) engine, among other factors, have enabled the engine to clear the U.S. SULEV emissions regulations while achieving a power of 190 HP. The new engine will be fitted in some ACCORD models to be marketed in California in 2007.
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Topic
Citation
Kojima, S., "Development of High-Performance and Low-Emission Gasoline Engine," SAE Technical Paper 2008-01-0608, 2008, https://doi.org/10.4271/2008-01-0608.Also In
References
- FOURIN, Inc. Global environment problems and the automotive industry in the 21st century 1992 92 97
- Kobayashi M. Exhaust emission reduction device and maintenance of a vehicle 1978 Sankaido Inc.
- Kitagawa H. Mibe T. Okamatsu K. Yasui Y. Super Ultra Low Emission System for the ACCORD SULEV HONDA R&D Technical Review 12 2 2000 37 44
- Niizato T. Hayashi A. Development of New 2.0 L Lean-burn Engine HONDA R&D Technical Review 12 2 2000 45 54
- Noguchi K. Fujiwara M. Segawa M. Sawamura K. Suzuki S. Development of V6 i-VTEC Engine with Variable Cylinder Management Honda R&D Technical Review 16 1 2004 85 92
- Wada Y. Ohtsu K. Narita K. Shinohara T. Development of i-DSI 2Plug Engine for 2004 Model Year Honda LIFE Honda R&D Technical Review 16 1 2004 93 102
- Seko K. Taga W. Torii K. Nakamura S. Akima K. Sekiya N. Development of 1.8 L i-VTEC Gasoline Engine for 2006 Model Year Honda CIVIC Honda R&D Technical Review 18 1 2006 8 15