| 摘要 |
Apparatus particularly useful in a motor driven vehicle for calculating and displaying both the current and historical fuel efficiency and/or rates of fuel consumption. The apparatus includes means for measuring the value of a variable quantity, e.g., miles traversed, accumulated during the most recent interval defined by a unit quantity, e.g., 0.01 gallon, consumed, for the purpose of displaying current fuel efficiency. Additionally, the apparatus includes arithmetic means for developing the average of the variable quantity accumulated over many such unit quantity intervals. Thus, when the apparatus is used in an automobile, for example, it is able to display to the driver the fuel efficiency in miles per gallon for the most recent 0.1 gallon consumed as well as for the most recent hundred or so gallons consumed.
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