Vehicle window washer with washer fluid temperature responsive pressure control

摘要

A vehicle window washer in which the pump outlet pressure is varied in an inverse manner with temperature of the washer fluid so as to maintain a more consistent fluid deposit on the window as fluid viscosity changes with temperature. In particular, it uses a motor driven pump which provides a higher pump outlet pressure with the motor driven in a first direction than with the motor driven in the opposite direction and switches activation of the motor between the two directions based on sensed temperature of the fluid in the washer fluid reservoir.