1987-11-08

The Prediction of Volumetric Efficiency Considering Gas Exchange Process in Spark Ignition Engine 871170

The volumetric efficiency for a 4-stroke, single- cylinder, spark- ignition engine is considered.
The mathematical model for the gas exchange process was formulated and solved by numerical technique. The mass flow rate, the pressure-time history in cylinder, intake and exhaust pipes, and the volumetric efficiency were calculated. The important parameter affecting volumetric efficiency was the pressure in the pipes. But, the effect of valve timing on volumetric efficiency was small (1, 2)*.
The experiments with 3-different cams were performed. The predicted results were compared with experimental data and satisfactory agreement was obtained. As a result, the volumetric efficiency could be predicted with a relatively simple mathematical model.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X