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Development of a Hollow Crankshaft

Article of Honda R&D Technical Review F1 Special (The third Era Activities)

Summary

A hollow crankshaft of light weight and high quality was realized through the use of friction welding. The oil passage in the journal was made a hollow structure, and this had the effect of increasing average oil pressure by 500 kPa (reducing the pressure drop), reducing the pulsation amplitude by 400 kPa, and raising the minimum oil pressure by 600 kPa. The connecting rod bearing clearance was also adjusted and confirmed to yield 1 kW of performance enhancement and over 1200 km of durability as well as curbing bearing friction. Although this new crankshaft was never used in a race, this developed technology has provided the prospect of the first hollow crankshaft of 10 kg or less for practical use in the Honda Formula One.

Author (organization or company)

Kiyonobu MIZOUE(Automobile R&D Center)、Yasushi KAWAHITO(Automobile R&D Center)、Ken MIZOGAWA(Automobile R&D Center)

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