On the Time Delay in Continuous In-Cylinder Sampling From IC Engines 890579
When gas sample is continuously drawn from the cylinder of an internal combustion engine, the sample that appears at the end of the sampling system corresponds to the in-cylinder content sometime ago because of the finite transit time which is a function of the cylinder pressure history. This variable delay causes a dispersion of the sample signal and makes the interpretation of the signal difficult An unsteady flow analysis of a typical sampling system was carried out for selected engine loads and speeds. For typical engine operation, a window in which the delay is approximately constant may be found. This window gets smaller with increase in engine speed, with decrease in load, and with the increase in exit pressure of the sampling system.
Citation: Cheng, W., Galliot, F., and Collings, N., "On the Time Delay in Continuous In-Cylinder Sampling From IC Engines," SAE Technical Paper 890579, 1989, https://doi.org/10.4271/890579. Download Citation
Author(s):
Wai K. Cheng, Franscois Galliot, Nick Collings
Pages: 11
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE Transactions Journal of Engines-V98-3
Related Topics:
Engine cylinders
Combustion and combustion processes
Windows and windshields
Pressure
Historical reference
Technical review
Gases
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »