Method of estimating the fuel/air ratio of an internal combustio

Details Method of estimating the fuel/air ratio of an internal combustio Method of estimating the fuel/air ratio of an internal combustio

1987-12-07

1988-12-06

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

047888547

ABSTRACT:
A method of estimating the fuel/air ratio of the mixture supplied to an engine is described in which the in-cylinder pressure signal in a combustion cycle is processed to obtain an estimate of the fresh mixture strength supplied to the cylinder. The estimation is obtained by calculating the trapped charge mass and the total fuel mass consumed in a combustion cycle. Based on these values, the fuel/air ratio is estimated.

REFERENCES:
patent: 4556030 (1985-12-01), Aono
Houpt, P. K. and Andreadakis, S. K., "Estimation of Fuel-Air Ratio from Cylinder Pressure in Spark-Ignited Engines," SAE Paper No. 830418, 1983.
Gilkey, J. C. and Powell, J. D., "Fuel-Air Ratio Determination from Cylinder Pressure Time Histories," in Dynamics and Control of Thermofluid Processes and Systems, ASME Winter Annual Meeting, 1984, pp. 39-45.

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