What is suction stroke in petrol engine?

Definition of suction stroke : the stroke of the piston in an internal-combustion engine that effects the drawing in of the gaseous mixture to the engine cylinder.

What is a Morse test?

Morse test is a method to measure the frictional power of a multicylinder SI engine. Morse Test – This test carried out on multi cylinder I.C. engine. In this test, first engine is allowed to run at constant speed and brake power of engine is measured when all cylinders are working and developing indicated power. (

Which of the following Morse test is applicable?

1. To which of the following Morse test is applicable? Explanation: The Morse test is used to measure the indicated power (IP) from multi-cylinder CI engines. The test consists of obtaining the indicated power (IP) of the CI engines without any apparatus.

What is suction stroke in 4-stroke petrol?

The four-stroke engine cycle Suction stroke:The piston descends towards Bottom Dead Center (BDC) and the outside air pressure is equalizing the reduced in-cylinder pressure through the open intake valve. In the vicinity of TDC, the fuel-air mixture is ignited and the in-cylinder pressure is increased.

What happens in suction stroke?

Intake: Also known as induction or suction. This stroke of the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.). In this stroke the piston compresses the air-fuel mixture in preparation for ignition during the power stroke (below).

What is a multi cylinder engine?

A multi-cylinder supercharged diesel engine with low compression ratio, in which for starting and possibly at partial load operation a number of the cylinders are operated as a compressor and the compressed air produced by the same is fed to the remaining cylinders operating as an engine in addition to the combustion …

Why Morse test is not suitable for single cylinder?

But in case of a single cylinder engine if the fuel supply is cut off no output is obtained to conduct the performance test. Therefore Morse test is not suitable for a single cylinder engine. Morse test is conducted to determine the power developed in each cylinder in a multi-cylinder engine.

Why is Morse test conducted?

The purpose of Morse Test is to obtain the approximate Indicated Power of a Multi-cylinder Engine. It consists of running the engine against a dynamometer at a particular speed, cutting out the firing of each cylinder in turn and noting the fall in BP each time while maintaining the speed constant.

Is Morse tested for single cylinder engine?

First indicated power is found out by cut out one cylinder at a time simultaneously. But the main point is that the Morse test is only applicable to multi-cylinder engines.

What is the compression pressure of petrol engine?

Since the gasoline engine has a spark plug, only moderate compression is enough, requiring about 140-160 pounds per square inch (PSI). Depending on their size and application, some engines may require a higher compression such as 220 PSI.