What is indicator diagram in IC engine?
An indicator diagram is a chart used to measure the thermal, or cylinder, performance of reciprocating steam and internal combustion engines and compressors. The indicator diagram is used to calculate the work done and the power produced in an engine cylinder or used in a compressor cylinder.
How many types of indicator diagrams are there?
There are four types of indicator diagrams: Power card. Draw card. Compression diagram. Light spring diagram.
What is an engine indicator?
An engine indicator is an instrument for graphically recording the pressure versus piston displacement through an engine stroke cycle. Engineers use the resulting diagram to check the design and performance of the engine. A mechanical indicator consists of a piston, spring, stylus, and recording system.
What is sketch indicator diagram?
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The indicator diagram (pv diagram or power card or work diagram), illustrates the pressure variations in the engine cylinder as a function of the main piston position. The diagram area can be integrated by means of a planimeter, and the mean indicated pressure calculated.
What is important of indicator diagram?
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Indicator diagrams are used to assess the performance of each unit of the ship’s main engine. It is based on the indicator diagram that the overall performance of the engine is assessed. If there is any difference, it is important that the problem is rectified before starting the engine.
What is PMAX and Pcom?
Pcom – Compression Pressure. Pmax – Maximum Pressure. There are 4 types of indicator diagrams that can be taken from the engine cylinder to know the condition and performance of the engine. Power card / Power indicator diagram.
What is draw card diagram?
Draw Card / Out of Phase Diagram Draw card is taken in a similar manner to power card with fuel pump engaged but with the indicator drum 90 degree out of phase with the piston stroke. This diagram illustrates more clearly the pressure changes during fuel combustion.
What is the use of indicator valves on the main engine?
Indicator Valves measure and monitor the cylinder pressure of diesel engine while the engine is running. This is to analyze the condition and effectiveness of the engine. Valve is mounted over the each cylinder head of diesel engine. Through a bore the indicator valve is connected to combustion chamber (cylinder).
What is BSFC in engine?
From Wikipedia, the free encyclopedia. Brake-specific fuel consumption (BSFC) is a measure of the fuel efficiency of any prime mover that burns fuel and produces rotational, or shaft power. It is typically used for comparing the efficiency of internal combustion engines with a shaft output.
What is draw card in engine?
Draw card is taken in a similar manner to power card with fuel pump engaged but with the indicator drum 90 degree out of phase with the piston stroke. This diagram illustrates more clearly the pressure changes during fuel combustion. Fuel timings or injector faults may be detected from its shape.
What is area indicator diagram?
4: Indicator diagram. The area which is encircled clockwise represents the positive work produced by combustion. The very narrow area which is encircled counterclockwise represents the work required to pump gases through the cylinder.
What is an indicator diagram what is its importance?
Indicator diagrams are used to assess the performance of each unit of the ship’s main engine. It is based on the indicator diagram that the overall performance of the engine is assessed.
