Method and apparatus for obtaining an efficiently running intern

Measuring and testing – Steam or water operated engine; related engine system or...

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G01M 1500

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active

043642659

ABSTRACT:
A method of providing an efficiently running internal combustion engine including the steps of operating an engine at a constant rpm while increasing the torque load on the engine, measuring the torque value at predetermined intervals of the torque load to obtain a brake mean effective pressure for each of the intervals, and measuring the fuel consumption at the predetermined intervals. The common log of the brake mean effective pressure is plotted against the common log of the fuel consumption for each interval to obtain a straight line curve (10) which extends linearly with a constant first slope to a D-point coordinate (16) after which it continues at a different second slope. A straight line extension (20) is plotted having the first slope and extending upwardly from the D-point coordinate (16). The instant invention is characterized by controlling at least one of the fuel inputs to the engine and the spark timing so that the plot of the common log of the brake mean effective pressure against the common log of the value of the fuel consumption for the constant rpm falls on the straight line extension (20).
The instant invention further provides an internal combustion engine assembly including an engine, a fuel input mechanism for supplying fuel to the engine, and a spark-generating mechanism for igniting the fuel within the engine. The assembly is characterized by a control mechanism for controlling at least one of the fuel input mechanisms and the timing of the spark-generating mechanism at predetermined values which result in the substantially straight line plot of the common log of the brake mean effective pressure against the common log of the fuel consumption of the assembly extending linearly with a constant slope at the operating rpm.

REFERENCES:
patent: 4261315 (1981-04-01), Geiger et al.

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