Display unit of fuel consumption meter for automobile

Details Display unit of fuel consumption meter for automobile Display unit of fuel consumption meter for automobile

1983-04-13

1987-03-03

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

34081501, 340753, 340715, B60Q 100

Patent

active

046479023

ABSTRACT:
A display unit of a fuel consumption meter for an automobile, wherein a proper fuel consumption is determined and an actual fuel consumption is measured and signals corresponding thereto are applied to comparing circuit and bar graph detectors. The comparing circuit compares the amplitude to the signals corresponding to proper fuel consumption and actual fuel consumption, and the bar graph decoders, after decoding the signals into a format compatible with a bar graph display, transmits the signals to an EX-OR circuit and an OR circuit. A selector circuit controlled by the output of a comparing circuit selects either the output of the EX-OR circuit or that of the OR circuit for driving plural segments of a bar graph display which accordingly displays both proper fuel consumption and actual fuel consumption either by driving selected display signals corresponding thereto or by driving display segments corresponding to a maximum value thereof and by inhibiting the driving of at least one display segment common to both proper fuel consumption and actual fuel consumption.

REFERENCES:
patent: 4210908 (1980-07-01), Sakakibara
patent: 4251769 (1981-02-01), Ewert et al.

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