Railway vehicles generally run under large lateral forces based on their steering performance of bogies in negotiating sharp curves. Those lateral forces are one of the main factors causing wheel flange climb derailment as low speeds on sharp curves, gauge face wear of high rails, wheel flange vertical wear and low rail corrugations Also, squeal generated on sharp curves, which is a kind of typical railway noise, is one of the most important environmental issues. On the other hand, the authors evaluated the effect of top of low rail lubrication and gauge face of high rail lubrication on lateral force and angle of attack. Focusing on the effect of top of low rail lubrication, wheel sliding is the most important key work to develop lubricant suitable for lubrication between wheel tread and top of rail. This paper describes the experimental results of friction moderator the authors developed, and jetting system installed in a bogie to supply the friction moderator into wheel/rail interface the authors proposed.

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