Economic speed indicator
First Claim
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1. A method of finding and holding the most economical speed of an engine or vehicle, comprising the steps of:
- continuously monitoring the ratio of instantaneous fuel consumption rate to engine torque or vehicle speed;
generating impulses in accordance with said ratio;
obtaining a derivative of said impulses;
determining the point of the most economic speed based on the value of said impulses; and
controlling the speed of the engine or vehicle according to the determined point of the most economic speed.
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Abstract
A method of finding and device for indicating and holding the economic speed of engines and vehicles, wherein the ratio of fuel consumption to engine torque or vehicle speed is continuously monitored based on the amplitude of impulses of such ratio, value and sign of the derivative of said ratio impulses, and wherein the point of maximum of the economic speed is used to control geared and travelling speed of the vehicle.
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Citations
7 Claims
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1. A method of finding and holding the most economical speed of an engine or vehicle, comprising the steps of:
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continuously monitoring the ratio of instantaneous fuel consumption rate to engine torque or vehicle speed; generating impulses in accordance with said ratio; obtaining a derivative of said impulses; determining the point of the most economic speed based on the value of said impulses; and controlling the speed of the engine or vehicle according to the determined point of the most economic speed.
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2. A device for finding and holding the most economical speed of an engine or vehicle, comprising:
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means for continuously monitoring the ratio of instantaneous fuel consumption rate to engine torque or vehicle speed; means for generating impulses in accordance with said ratio; means for obtaining continuously derivative of said impulses; means for determining the point of the most economic speed based on the value of said impulses; and means for controlling the speed of the engine or vehicle according to the determined point of the most economic speed. - View Dependent Claims (3, 4, 5, 6, 7)
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Specification