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Development of i-VTEC Gasoline Engine for 2008 Model Year Honda FIT

Article of Honda R&D Technical Review Vol.20 No.1

Summary

Lightweight, compact 1.3-L and 1.5-L 4-cylinder SOHC i-VTEC gasoline engines were developed that achieve a balance of environmental performance (low fuel consumption, low exhaust emissions) and high output. The 1.3-L model employs a 4-valve cylinder head, VTEC that operates with one intake valve inactive for rapid combustion, and friction reduction technology.
As a result, it achieves 24-km/L fuel consumption in 10-15 mode as well as high power with 73 kW of maximum output and 127 Nm of maximum torque. The 1.5-L model has a high-output VTEC for a maximum output of 88 kW and maximum torque of 145 Nm, the same friction reduction technology as that of the 1.3-L model, and achieves 19.6 km/L fuel consumption in 10-15 mode. The technology for low exhaust emissions includes a close-coupled catalyst, high-accuracy adaptive air-fuel control, and a cylinder head with integrated exhaust manifold, the same as that employed in the CIVIC. As a result, using the 10-15 and JC08C mode, the engines to be used in all 2008 FIT models have achieved an emissions level 75% below the level required by Japanese 2005 regulations.

Reference

(1) Nakayama, Y., Suzuki, M., Iwata, Y., Yamano, J.: Development of a 1.5L 2PLUG Engine for the 2002 year Model Fit, Honda R&D Technical Review, Vol. 13, No. 2, p. 43-52
(2) Seko, K., Taga, W., Torii, K., Nakamura, S., Akima, K., Sekiya, N.: Development of 1.8L i-VTEC Gasoline Engine for 2006 Model Year Honda CIVIC, Honda R&D Technical Review, Vol. 18, No. 1, p. 8-15
(3) Noumura, K., Yoshida, J.: Method of Transfer Path Analysis for Interior Vehicle Sound Using Principal Component Regression Method, Honda R&D Technical Review, Vol. 18, No. 1, p. 136-141
(4) Kobayashi, T., Take, K., Kamiya, M., Takahashi, Y.: Piston Slap-noise Prediction Using 3-dimentional Piston Secondary Motion Simulation, Honda R&D Technical Review, April 2007, p. 163-169
(5) Sato, K., Fujii, K., Ito, M., Koda, S.: Friction Analysis by Piston Secondary Motion Simulation in Consideration of Cylinder Block Bore Distortion, Honda R&D Technical Review, Vol. 18, No. 1, p. 94-100

Author (organization or company)

Ryutaro TAGISHI(Automobile R&D Center)、Tsutomu SATO(Automobile R&D Center)、Hiroshi KAWAGUCHI(Automobile R&D Center)、Yoshiharu HAGIWARA(Automobile R&D Center)

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