INDICATOR DIAGRAM
indicator diagram At the same time it will indicate pressure and the position of piston. Purpose: To indicate the power developed in the system (cylinder). To indicate the pressure maximum (Pmax) and compression pressure To find the exhaust and scavenging condition To evaluate the combustion process. Types of indictor diagram. Draw card Power card Compression card Light spring diagram DRAW CARD Its used to find the Pmax & Pcom accurately With this draw card we can find the ignition delay,fuel pump timing and after burning and the loss of compression. Its 90° out off phase with piston movement. POWER CARD Its used to find the indictor power. And to find the peak pressure and compression pressure. Its in-phase with piston with fuel on. It can be find by planimeter. COMPRESSION CARD Its used to find the compression pressure. Ans the cylinder thickness. Its in-phase cut off fuel and reduce rpm. LIGHT SPRING DIAGRAM Its used to find the pressure variation in the cylinder. With