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Torque Steer Simulation Technology for Performance Design in Model Based Development

Article of Honda R&D Technical Review Vol.31 No.1

Summary

A differential gear model was devised that can be used to examine torque steer when the vehicle is launching from standstill in MBD performance design. The model was expanded to enable reproduction of the transient left-right torque bias ratio, which was previously treated as a constant, by adding an element that takes into account the left-right difference in rotational speed derived from uneven torsional stiffness of driveshaft. Conventional methods needed a complex model using a multibody dynamics model. The proposed method uses a simple essential model to express the torque steer mechanism. This enabled analysis of the contribution due to the difference in transient drive torque in MBD performance design. As a result, countermeasure methods could be quantitatively and efficiently examined in performance design in the initial stages of development. The proposed method was applied to development of 2016 model year mass-production vehicles, and its usefulness was confirmed.

Reference

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(2) Toyoshima, T., Azekatsu, Y., Kobayashi, Y., Ikeda, N., Takano, H., Obata, I.: Technique for Simulating Vehicle Handling in Very Low Speed Range for Model Based Development, Honda R&D Technical Review, Vol. 30, No. 2, p. 110-118
(3) Toyoshima, T., Azekatsu, Y., Ikeda, N.: Crosswind Stability Simulation Technology for Performance Design in Model Base Development of Mass-production Vehicles, Honda R&D Technical Review, Vol. 30, No. 1, p. 66-73
(4) Toyoshima, T., Matsuzawa, T., Ushimura, T.: Lap Time Simulation Technology for Performance Design during Production Car Development, Honda R&D Technical Review, Vol. 29, No. 2, p. 124-133
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(10) Dornhege, J.: Torque Steer Influences on McPherson Front Axles, 2002 European MSC. ADAMUS User Conference, (2002)
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Author (organization or company)

Naofumi IKEDA(Automobile R&D Center)、Takayuki TOYOSHIMA(Automobile R&D Center)

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