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Development of SH-AWD (Super Handling-All Wheel Drive) System

Article of Honda R&D Technical Review Vol.16 No.2

Summary

In a world first, Honda has developed the SH-AWD (Super Handling-All Wheel Drive) system, enabling complete control of torque distribution to any wheel, front or rear, left or right.
A direct electromagnetic clutch in which solenoid attraction acts directly on the clutch was newly developed to enable the system to be realized. In addition, a 2-speed shift unit was developed to adjust differential revolutions in the clutch in order to enable the system to exert control under all conditions.
The use of this system in a vehicle provided incredibly neutral steering and high vehicle stability by direct control of turning yaw moment through differential distribution of torque to the right and left wheels. And the vehicle has enhanced cornering limit performance by equalization of the load ratio between the wheels through differential distribution of torque to all four wheels.

Reference

(1) Tanaka, S., Sawase, K., Takada, K., Sano, R., Okabe, T.: Development of Vehicle Cornering Control System Utilizing Driving/Braking Force Differences Between Right and Left Wheels, Mitsubishi Motors Technical Review, No. 9, p. 40-51 (1995)
(2) Shibahata, Y., Shimada, K., Tomari, T.: The Improve of Vehicle Maneuverability by Direct Yaw Control, Proceedings of the International Symposium on Advanced Vehicle Control, p. 452-457 (1992)
(3) Shibahata, Y., Kuriki, N., Kitamura, K., Honda, K., Wada, K., Kajiwara, H., Mori, A., Kuwahara, K., Ohkuma, S.: Development of Active Torque Transfer System, HONDA R&D Technical Review, Vol. 9, p. 70-79
(4) Shimada, K., Shibahata, Y.: Analysis of Vehicle Maneuverability by β-Yaw Moment Diagram, Transactions of Society of Automotive Engineers of Japan, No. 25, p. 122-127 (1994)

Author (organization or company)

Rikiya KUNII(Tochigi R&D Center)、Akihiro IWAZAKI(Tochigi R&D Center)、Yoshihiro ATSUMI(Tochigi R&D Center)、Atsushi MORI(Tochigi R&D Center)

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