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New In-Line 4-Cylinder Gasoline Direct Injection Turbocharged Downsizing Engine

Article of Honda R&D Technical Review Vol.28 No.1

Summary

Two new models of in-line four-cylinder VTEC turbo engine have been developed as part of the cluster of new-generation power train technologies known as EARTH DREAMS TECHNOLOGY, which achieves a high-level balance between driving performance and fuel consumption. Both VTEC engines use high-tumble ports, valve timing control (dual VTC) of both intake and exhaust camshafts, multi-hole direct side injectors, and high-response turbochargers with attached electric waste gate actuator. With these technologies in common, the new engines successfully yield maximum thermal efficiency and power through cooperative control and turbocharging conditions based on combustion technology that uses high-tumble flow. The 1.5 L engine puts out the same 110 kW of maximum power as the 2.0 L naturally aspirated engine while increasing low- and medium-speed torque by a maximum of 30%. A vehicle with this engine installed achieved fuel consumption of 17 km/L in JC08 mode, which puts it at the top of the minivan class, and a 75% reduction relative to the level required by Japanese 2005 regulations for exhaust emissions. As a high-powered sport engine, the 2.0 L model achieves maximum output of 228 kW and maximum torque of 400 Nm. A vehicle with this engine installed achieved CO2 emissions of 170 g/km in European fuel economy mode and Euro 6b compliance.

Reference

(1) Petitjean, D., Bernardini, L., Middlemass, C., Shahed, S. M.: Advanced Gasoline Engine Turbocharging Technology for Fuel economy Improvements, SAE Technical Paper, 2004-01-0988, (2004)
(2) Shahed, S. M., Bauer, K.: Parametric Studies of the Impact of Turbocharging on Gasoline Engine Downsizing, SAE Technical Paper, 2009-01-1472, (2009)
(3) Suzuki, M., Hayakawa, S., Ishihaya, Y., Shindo, T.: Development of the New L4 Gasoline Engine for Compact Cars, JSAE Annual Congress Proceedings, No. 91-14, p.9-12, (2014)

Author (organization or company)

Koji NAKANO(Automobile R&D Center)、Yusuke WADA(Automobile R&D Center)、Mitsutaka JONO(Automobile R&D Center)、Shigeru NARIHIRO(Automobile R&D Center)

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