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Development of 2005 Model Year ACCORD Hybrid System

Article of Honda R&D Technical Review Vol.17 No.1

Summary

The 2005 model year ACCORD Hybrid was developed to enhance the driving performance of a V6 luxury sedan while retaining the fuel economy of a compact class, four-cylinder CIVIC sedan. The base 3.0L V6 engine has been equipped with Variable Cylinder Management (VCM) to decrease parasitic pumping losses in the engine, while motor assist has been employed to extend the operating range of the three-cylinder operation mode. Both these factors have contributed to improved fuel economy. The Integrated Motor Assist (IMA) system applies new technologies to the high-voltage electrical equipment, including fine patterning of the inverter chips, as well as the use of an Interior Permanent Magnet (IPM) rotor. The result has been a 20% increase in maximum power and a 26% increase in maximum torque.
A hybrid compressor fitted with a high-voltage drive has been employed to increase the commercial appeal of idle stop. In order to offset the increase in weight from the IMA system, aluminum has been employed in the bumper beams and certain other parts to reduce weight. All of these fuel saving technologies have resulted in a level of fuel economy, equal to that of the compact class, four-cylinder CIVIC sedan, achieving 29 mpg in US City mode and 37 mpg in US Highway mode.

Reference

(1) Aoki, et al.: Development of Motor Type Hybrid Power Train, Automotive Technology Conference Proceedings, No. 98-99
(2) Ochiai, S., Uchibori, K., Hara, K., Tsurumi, T., Suzuki, M.: Development of the Motor Assist System for a Hybrid Car-INSIGHT, HONDA R&D Technical Review, Vol. 12, No. 1, p. 7-14
(3) Matsuki, M., Wakashiro, T., Kamiyama, T., Sato, T., Kaku, T., Kanda, M.: Development of a New Power Train for the Civic Hybrid, Honda R&D Technical Review, Vol. 14, No. 1, p. 39-48
(4) 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, Vol. 16, No. 1, p. 85-92
(5) Trends in Battery Application Product Development: Battery and Configured Material Market 1999 - Market Trends in First Generation Batteries, Second Generation Batteries, Fuel Cells, Solar Batteries, Capacitor and Battery Configured Materials, CMC Publishing Co., Ltd., p. 180 (1999)
(6) Aitaka, K., Hosoda, M., Nomura, T.: Development of Intelligent Power Unit for Civic Hybrid, Honda R&D Technical Review, Vol. 14, No. 2, p. 83-90

Author (organization or company)

Masaaki KAIZUKA(Tochigi R&D Center)、Toshitaka IMAI(Tochigi R&D Center)、Susumu ISHIKAWA(Tochigi R&D Center)、Manabu NIKI(Tochigi R&D Center)、Hiromitsu ADACHI(Tochigi R&D Center)

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