MEANS FOR HEATING WINDSHIELD WASHER FLUID

• US 3,756,510 A
• Filed: 03/15/1972
• Issued: 09/04/1973
• Est. Priority Date: 03/16/1971
• Status: Expired due to Term

• Current Assignee: Karsten Ehlers, Ludwig Nitterl
• Original Assignee: Karsten Ehlers, Ludwig Nitterl
• Inventors: Nitterl, Ludwig, Ehlers, Karsten
• Primary Examiner(s): Ward, Jr., Robert S.
• Application Number:
  US05/234,882
• Time in Patent Office: 538 Days
• Field of Search: 239/129-131
• US Class Current: 239/129
• CPC Class Codes: B60S 1/487 the liquid being heated nozzles provided with heating means B60S1/52

Abstract

A washing device for windows of motor vehicles, in which the washing fluid coming from a container is heated in a heat exchanger located in a duct connecting the cooling jacket of an internal combustion engine with a special heat exchanger which surrounds the wall of the intake manifold of the internal combustion engine to prevent vapor lock. The washer fluid is conducted to the window spray jets after passage through the first mentioned heat exchanger.

Claims

1. Apparatus for supplying heated washing fluid to the spray jets of a window washer device of a motor vehicle, the vehicle having an internal combustion engine with an intake manifold, and a cooling jacket for flow of coolant around the engine, said apparatus comprising a container for washing fluid, conduit means extending from said container to the spray jets for conveying washing fluid therebetween, a heat exchanger surrounding the intake manifold of the engine, a duct connected between the cooling jacket of the internal combustion engine and the heat exchanger surrounding the intake manifold engine for flow of coolant, the heat exchanger serving to prevent vapor lock, and a second heat exchanger incorporated in said duct between the heating jacket and the first heat exchanger, said conduit means passing through said second heat exchanger so that washing fluid passing therethrough can undergo heat exchange with coolant passing through said duct.

2. Apparatus as claimed in claim 1 wherein the construction of the second heat exchanger is such that the coolant and washing fluid flow in countercurrent in said second heat exchanger.

3. Apparatus as claimed in claim 1 wherein said second heat exchanger comprises a housing, said conduit means including a coil-shaped portion in said housing defining a clear passageway through which the coolant travels.

4. Apparatus as claimed in claim 3 wherein said duct has an inlet leading into said second heat exchanger and an outlet leading from said second heat exchanger, said inlet and outlet having equal cross-sectional areas which are respectively equal to the cross-sectional area of said passageway.

5. Apparatus as claimed in claim 4 wherein said coil shaped portion comprises windings in abutment with one another.

6. Apparatus as claimed in claim 5 wherein said housing comprises a cylindrical casing having opposite ends, and cover plugs closing the ends of the casing.

7. Apparatus as claimed in claim 6 wherein said coil-shaped portion of the duct is confined to the cylindrical casing.

8. Apparatus as claimed in Claim 6 wherein said plugs each has an opening for passage of the conduit means therethrough.

9. Apparatus as claimed in claim 8 wherein said duct is connected to said plugs for flow of the coolant into and from the second heat exchanger.