Abstract

The use of different casting methods causes differences in the detailed shapes of mass-production and prototype models of the hydraulic valve bodies which make up the hydraulic circuits employed for shift control in automatic transmissions. These differences make it necessary to reset the shift control specifications in mass-production models after their initial setting in the prototypes. This issue could be resolved by replacing the sand molds currently used to cast prototypes with the dies used in mass production, but the length of time required to produce prototypes with the dies renders this method impractical. New production techniques were therefore proposed and the production workflow was studied to reduce the period required to produce dies. As a result, prototype hydraulic valve bodies can now be produced using dies in a shorter period than previously required when using sand molds.

References

1. (1) Uchida, T., Nagai, S., Koyama, S.: Practical Examples and Future Directions for CAE-Based Development for Automobile Transmission by Designers, Honda R&D Technical Review, Vol. 15, No. 1, p. 109-114 (2003)
2. (2) Shimada, H., Ishihama, Y., Kubota, N., Uchida, T.: Establishment of Design Method for Transmission by 3D Media, Honda R&D Technical Review, Vol. 14, No. 2, p. 107-114 (2002)
3. (3) Uchida, T., Nagai, S.: Practical Examples of Virtual Development for Automotive Transmission, JIDOSYAGIJUTSU, Vol. 56, No. 6, p. 71-76 (2002)

Author (organization or company)

• Hiromi SHIMADA（Tochigi R&D Center）
• Yoichiro ISHIHAMA（Tochigi R&D Center）
• Yoshihisa HAYAKAWA（Tochigi R&D Center）
• Shigemi KAWATA（Tochigi R&D Center）
• Takanao UCHIDA（Tochigi R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.16 No.1 (71 - 76)

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Citation Information