A Fundamental Study on the Reversal Behavior of an Automobile Wiper Blade

Abstract

Automobile wiper systems provide a clear sight for drivers by creating a very thin layer of water about few dozen nano meters on a windshield. Several studies have been carried out to investigate the dynamic behavior of the wiper systems. However, there are few studies focused on reversal behavior of the wiper blade. Observation was conducted and analytical model is developed from the observation of the real wiper system. A water layer is considered in the analytical model between the wiper blade and the glass surface. The bottom of the model is assumed to always contact the water layer so that the fluid force is always applied. The dimensionless equations, which govern the wiping motion including the reversal behavior, were derived. The equations are discussed neglecting the nonlinear terms to understand the approximate movement and effect of the parameters. Moreover, the equation is solved numerically to obtain the time histories of the wiper blade. As a result, the effect of the fluid force, which acts on the wiper blade on the reversal behavior of the wiper blade, became clear.

A theoretical analysis of friction and vibration characteristics of wiper reversal process

“…To reduce the friction coefficient of blade 21,22 and conduct the active control, [23][24][25][26][27][28] furthermore, some theoretical measures according to the mechanism of vibration and noise of the wiper-windscreen friction system, such as the structure modifications, 16,21,22 the elimination of friction-negative slope characteristic of relative sliding velocity, [22][23][24] were proposed. The attack angle of wiper blade and the pressure of scraper arm are controlled within a certain speed range.…”