Vehicle fuel economy calculator and indicator

Registers – Transfer mechanism – Traveling pawl

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

Patent

active

039670970

ABSTRACT:
A vehicle fuel economy calculator including a digital circuit for generating a first series of pulse groups with the number of pulses in each group representing a calculation of instantaneous vehicle fuel economy. A digital averaging circuit generates a second series of pulse groups with the number of pulses in each group representing an average vehicle fuel economy determined by the average number of pulses in each pulse group in a predetermined number of consecutive pulse groups in the first series. A gating and indicating circuit is responsive to the vehicle speed and fuel consumption rate for providing an indication of zero fuel economy when the vehicle speed is below a predetermined speed, for coupling the first series of pulse groups to the indicator during a specified period of time after the vehicle reaches the predetermined speed or when the fuel consumption exceeds a predetermined rate, and for coupling the second series of pulse groups to the indicator circuit at all other times.

REFERENCES:
patent: 2282438 (1942-05-01), Thompson
patent: 3549868 (1970-12-01), Watson et al.
patent: 3793882 (1974-02-01), Holben
patent: 3927305 (1975-12-01), Gruhl

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