Engine analyzer with simulated analog meter display

Details Engine analyzer with simulated analog meter display Engine analyzer with simulated analog meter display

1981-12-04

1984-08-21

Krass, Errol A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340720, 340722, 364551, G09G 100

Patent

active

044673230

ABSTRACT:
An engine analyzer for an internal combustion engine includes circuitry, under the control of a microprocessor, which senses parameters of operation of the internal combustion engine and supplies digital signals indicative of those sensed parameters. A raster scan cathode ray tube (CRT) display is controlled by the microprocessor to display a simulation of an analog meter having a pointer or needle which moves as a function of the digital signals. When an analog display, such as a tachometer, is selected, the microprocessor controls the raster scan CRT to display a visual depiction of a meter having the appropriate range of values and having a needle which moves according to the measurements made by the system. The microprocessor automatically changes the scale of the simulated meter as appropriate without operator intervention. When operation within a predetermined range of values is required, the microprocessor causes the raster scan CRT display to produce a shaded area representing the range within which the needle should remain.

REFERENCES:
patent: 3726250 (1973-04-01), Merk
patent: 3908355 (1975-09-01), Wiesner
patent: 4376934 (1983-03-01), Prohaska et al.

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