The characteristics of the cylinder pressure rise during the power stroke can be analyzed by the cylinder pressure on a piston stroke (Cylinder Volume) base indicator diagram (P-V Diagram). The combustion process can be broken into three phases or periods, (1)the delay period, (2)the rapid pressure rise period and (3)the after burning period. All of the pertinent data can be made available by using a dynamometer and a PC based spark ignition combustion analysis system. These systems can be expensive and difficult to set up. Using the Yokogawa DL708E/DL716 can simplify making the Indicator Diagram.
The Yokogawa Model DL708E 8-Channel/ DL716 16-Channel provide the following solutions for this application :
|The figure (left) is an example of drawing an Indicator Diagram. CH1 (yellow) is pressure signal of cylinder and CH2 (green) is cylinder volume curve by the above calculation in user define math.