과도운전시 가솔린기관의 성능평가

다국어 초록 (Multilingual Abstract)

An experimental study was carried out to evaluate the characteristics of transient performance of carburet-tered gasoline engine under rapid accelerating transient driving conditions.<br/>
In order to evaluate the characteristics of transient performance quantitatively, the concept of dead time to and response delay time t, are introduced.<br/>
Performance parameters such as air mass flowrate Gat, engine speed N, manifold boost pressure Pb, and output torque T are measured simultaneously during the rapid opening of the throttle valve by the stepping motor.<br/>
During the rapid opening of the throttle valve, air mass flowrate Gat is increased immediately without delay time, but response of engine revolution N, and output torque T are delayed. Therefore hesitation, and stumble phenomena are occurred.<br/>
Dead time td and response delay time t, of engine revolution N, which is extremely delayed comparing to other performance parameters, are respectively 0.2 - 0.3sec., 3.0-- 4.6sec., and dead time rate t??/ △t and response delay time rate t??/△t are linearly increased with the throttle valve opening rate e during the acceleration from 12 degree to 20 degree at 1250rpm.