Motor vehicle economy measuring instrument

Details Motor vehicle economy measuring instrument Motor vehicle economy measuring instrument

1975-06-16

1976-08-31

Queisser, Richard C.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

73115, G01M 1500

Patent

active

039772381

ABSTRACT:
A device is disclosed for providing an operator of a motor vehicle with a continuous indication of gas mileage and engine efficiency and operating conditions as well as an indication of the effect the operator's driving habits have upon fuel economy. A vacuum gauge device is provided the input of which is coupled to a source of vacuum from the intake manifold of the vehicle's internal combustion engine. Two numeric scales are provided imprinted upon the scale plate of the gauge. A first scale calibrated in miles per gallon (or kilometers per liter) indicates the rate of fuel consumption independent of road conditions or vehicle load. The second numeric scale is calibrated in miles per hour corresponding to efficient engine operation. A reading on that scale higher than the steady speed at which the vehicle is then traveling indicates less than peak operating efficiency. A marker may also be provided upon the gauge scale which indicates the proper intake manifold pressure for efficient operation during engine idling conditions. Means may also be provided adjusting out changes in readings caused by changes in atmospheric pressure.

REFERENCES:
patent: 3084539 (1963-04-01), Wentworth
patent: 3263503 (1966-08-01), White
patent: 3608368 (1971-09-01), Cuff

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