Cylinder-by-cylinder engine pressure and pressure torque wavefor

Details Cylinder-by-cylinder engine pressure and pressure torque wavefor Cylinder-by-cylinder engine pressure and pressure torque wavefor

1988-07-25

1989-07-04

Myracle, Jerry W.

Measuring and testing

Test stand

For engine

73660, G01M 1500

Patent

active

048438707

ABSTRACT:
An elastic model of the engine-drivetrain system is proposed. Measured crankshaft speed fluctuation data is developed and computations are made from the model to determine the fluctuation waveform of both the total engine torque being developed and the engine pressure torque. Utilizing the engine pressure torque fluctuation waveform, the mean level of engine torque being developed is obtained, thus providing the full engine pressure torque waveform. Finally, the engine pressure torque waveform is used to obtain the cylinder pressure waveform which gave rise to it. Knowledge of these torques and of the cylinder pressure provides the basis for both open loop and adaptive engine control strategies.

REFERENCES:
patent: 3657922 (1972-04-01), Sibeud
patent: 4581923 (1986-04-01), Nitao et al.

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