Automatic Automotive Vehicle Temperature Verification
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Feb-01
This article describes a technique to automatically verify the accuracy of the coolant temperature sensor on an automotive vehicle. In order to meet and maintain federally regulated levels of fuel economy and exhaust emissions, manufacturers of automotive vehicles have incorporated a large number of electronic components to provide greater control over engine parameters which affect fuel economy and (Image Omitted) emissions. Fig. 1 depicts a typical electronic control system for a normally asperated internal combustion engine. The electronic control module (ECM) contains a programmable microprocessor, significant analog circuitry to read sensors and solid-state drivers to control various switches, relays and actuators.