Registers – Transfer mechanism – Traveling pawl
Patent
1975-02-03
1976-09-28
Wise, Edward J.
Registers
Transfer mechanism
Traveling pawl
2351513, 235 61J, 73114, G10M 1500
Patent
active
039833720
ABSTRACT:
The apparatus gives a simultaneous readout of the semi-instantaneous rate of fuel consumption, expressed in terms of miles per gallon; the distance traveled; and the total amount of gallons consumed since the apparatus was last reset for a moving vehicle powered by an internal combustion engine. The fuel is metered by a flow transducer which emits a pulse rate representative of fuel flow rate while at the same time the miles traveled by the moving vehicle are measured by a distance transducer also emitting a pulse rate. Both pulse rates are fed to digital integrated circuitry that provides readouts for miles traveled, total fuel consumed and for the semi-instantaneous miles per gallon.
The apparatus also includes a reset switch, a hold switch to maintain the indicator readings while not inhibiting the accumulation of further counts, and internal switches to accommodate vehicle-to-vehicle variations in rear end ratios and tire sizes.
The method comprises the steps of generating a first series of pulses related to fuel flow to the engine so that a predetermined amount of fuel is consumed by the engine prior to emission of a pulse; generating a second series of pulses related to the distance traveled by the vehicle; summing and displaying a sum of all of the second-series pulses accumulated before a pulse emission from the first series. This displayed sum is then replaced by a subsequent sum accumulated up to emission of a respective subsequent pulse from the first series.
Other steps include summing and displaying the entire first and second pulse series to respectively represent total fuel consumed and total miles traveled.
REFERENCES:
patent: 2282438 (1942-05-01), Thompson
patent: 3549868 (1970-12-01), Watson et al.
patent: 3793882 (1974-02-01), Holben
Chevron Research Company
Freeland, Jr. R. L.
Kloeppel R. T.
Wise Edward J.
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