Patent ID: 8047451

Claim:
A window washing system for a motor vehicle, comprising: a nozzle located adjacent a vehicle window for directing washer fluid against the window; a washer fluid reservoir to contain a supply of washer fluid; a heat exchanger having an inlet connected to the washer fluid reservoir and an outlet connected to said nozzle, the heat exchanger having a coolant passage plate and a first wiper fluid plate, wherein the first wiper fluid plate and coolant passage plate are held together by a fastening means; the coolant passage plate allows the passage of coolant from the heat exchanger inlet to the heat exchanger outlet and the first wiper fluid plate contains a wiper fluid passage to route wiper fluid through the first plate to transfer heat from the engine coolant, the wiper fluid passage being in the form of a trench recessed in and defined by the first plate, wherein such a trench is only formed on one side of the first plate; pumping means for transferring washer fluid from said washer fluid reservoir into said heat exchanger and from said heat exchanger to said nozzle; and means for circulating coolant from a motor cooling system into the heat exchanger with the washer fluid inside to thereby heat the washer fluid.