Fuel economy measuring circuit employing rate multiplier compone

Details Fuel economy measuring circuit employing rate multiplier compone Fuel economy measuring circuit employing rate multiplier compone

1977-01-18

1978-09-05

Morrison, Malcolm A.

Boots, shoes, and leggings

73114, 235 61J, 235 92FL, 364703, G01M 1500

Patent

active

041124928

ABSTRACT:
In a fuel economy measuring circuit a first train of pulses having a rate which is a function of the velocity of the vehicle or of the fuel consumption rate is fed into one input terminal of an up-down counter for causing the counter to count up or down as the case may be. A second train of pulses having a pulse rate which is a function of the fuel consumption of the vehicle per unit time or velocity of the vehicle is fed into one input of a rate multiplier for multiplication with the output of the up-down counter to derive a product output train of pulses having a pulse rate which is a function of the product of the output signal of the counter and the other input. The output pulse train of the rate multiplier is fed to the other input terminal of the up-down counter. The up-down counter serves as a null detector and the output of the up-down counter is proportional to the fuel economy either in distance per unit fuel quantity or fuel quantity per unit of distance of the vehicle (miles per gallon or gallons per mile). The output signal from the up-down counter is fed to a display for displaying to the operator the fuel economy measurement.

REFERENCES:
patent: 3793882 (1974-02-01), Holben
patent: 3927305 (1975-12-01), Gruhl
patent: 3967097 (1976-06-01), Moretti
patent: 3983372 (1976-09-01), Klaver
patent: 4046998 (1977-09-01), Kuno et al.

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