Patent Number: 6,254,011

Title: Non-linear potentiometer heater control

Abstract: A vehicle is provided with an operators cab having a heating system. The vehicle is powered by an internal combustion engine that is a source of heated fluid. Heated fluid from the engine is directed to a supply line where it is carried to a heat exchanger in communication with the interior of the operators cab. A valve having an electrical actuator regulates the flow of heated fluid through the supply line to the heat exchanger. A non-linear potentiometer controls the actuator so that the heat output of the heat exchanger is linear with respect to the operation of the control knob. The non-linear potentiometer drives the actuator so that the valve is opened at an increasing rate until it its fully opened.

Inventors: Kelly; Andrew Wayne (Sherrill, IA), Bollweg; Nicholas Edward (Galena, IL)

Assignee: Deere & Company

International Classification: B60H 1/04 (20060101); B60H 1/00 (20060101); B60H 1/10 (20060101); B60H 001/02 ()

Expiration Date: 07/03/2018