Adaptive tachometer redline

Details Adaptive tachometer redline Adaptive tachometer redline

2005-11-01

2005-11-01

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Quality evaluation

C702S145000, C324S166000

Reexamination Certificate

active

06961667

ABSTRACT:
A tachometer system is provided for a motor vehicle having an engine selected from a plurality of engines having unique maximum rated engine RPMs. The system has an RPM data signal and scale correction data. A microcontroller receives the RPM data signal and said scale correction data and generates a scaled tachometer signal therefrom in accordance with a computer program stored in a memory. A gauge drive circuit receives the scaled tachometer signal from the microcontroller. A tachometer gauge has a pointer driven by the gauge driver circuit. The computer program calculates the scaled tachometer signal according to a first scaling constant while the RPM data signal represents less than a predetermined RPM, and calculates the scaled tachometer signal according to a second scaling constant while the RPM data signal represents greater than the predetermined RPM. The second scaling constant is selected from a set of predetermined scaling constants according to the scale correction data.

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