1
مکانیک::
دریچه کاملا باز
Measured (dots) and calculated temperature (°C) distributions in piston pin and thrust planes of the piston of a four-cylinder 2.5-dm3 spark- ignition engine at 4600 rev/min and wide-open throttle.44
Spark-ignition engine at 5520 rev/min and wide-open throttle. rc = 8.5.
Assuming appropriate values for the engine geometry and operating conditions at wide-open throttle with the wall temperature at 400 K, at an engine speed of 2500 rev/min, and using the cylinder pressure versus crank angle curve of Fig. 14-9, calculate the following:
Figure 13-8 shows total motored friction mep for several four-stroke cycle four- cylinder SI engines between 845 and 2000 cm3 displacement, at wide-open throttle, as a function of engine speed.6 The data are well correlated by an equation of the form of (13.5):
Figure 13-9 shows how mechanical efficiency and the relative importance of pumping work vary over the load range idle to wide-open throttle under midspeed operating conditions.
واژگان شبکه مترجمین ایران