Device for indicating the economical operating range of an engin

Details Device for indicating the economical operating range of an engin Device for indicating the economical operating range of an engin

1980-08-26

1982-06-01

Smith, Robert I.

Measuring and testing

Vehicle chassis

Steering

116 624, 116300, G01M 1500, G01L 513

Patent

active

043321623

ABSTRACT:
A device for indicating the economical operating range of an internal combustion engine. The device includes two indicating elements arranged in a common housing. One indicating element indicates the momentary load condition of the internal combustion engine, and the other indicates the momentary speed. Each indicating element has its own measured value scale, lying in a common plane with that of the other, and also has an indicator needle. Each measured value scale includes an upper limit value and a lower limit value which are dependent upon the characteristic of the internal combustion engine being measured, and which define the economical operating range of the internal combustion engine as a function of the parameter being measured. The economical operating range of the internal combustion engine is indicated as a surface externally of both measured value scales, whereby the surface is limited by straight lines which extend from the pivot axes of the indicator elements through the pertaining lower and upper limit values on the respective measured value scale. Furthermore, the indicator needles are of such a length and are so arranged at such a height that they intersect or cross each other in the economical operating range.

REFERENCES:
patent: 791785 (1905-06-01), Hertzberg et al.
patent: 3678742 (1972-07-01), Westcott et al.
patent: 3686941 (1972-08-01), Kramasz et al.

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