More

    BASICS OF: INTERNAL COMBUSTION ENGINE

    INTRODUCTION

    The internal combustion engine is the engine installed in every auto vehicle. The internal combustion engine provides the power to run the auto vehicle. Autos, Cars, Lorries, and trains can not move without an internal combustion engine. The internal combustion engine is the lifeline of our transportation sector. Our life in this world will be standstill if the internal combustion engine were not existing. Internal combustion engine as the name implies combustion of fuel takes place inside the engine cylinder. This combustion of fuel develops power. Power developed in the engine cylinder exerts the thrust on the central shaft of the engine, which gives motion to the wheel connected to the central shaft. Thus, our vehicle starts running.

    PARTS OF SPARK IGNITION ENGINE

    (1)Crankshaft

    (2)Connecting rod

    (3)Piston

    (4)Pushrod

    (5)Rocker arm

    (6)Camshaft

    (7)Intake valve

    (8)Exhaust valve

    (9)Carburettor

    (10)Ignition leads

    (11)Spark plug

    (12)Air filter

    (13)Intake manifold

    (14)Exhaust manifold

    TYPES OF COMBUSTION ENGINE

    Depending on the process of ignition of fuel inside the engine cylinder, they are classified as follows:

    (1)Spark Ignition Engine

    (2)Compression Ignition Engine

    SPARK IGNITION ENGINE

    The spark-ignition engine works on the Otto Cycle. Spark ignition engine is mainly used in Cars, Busses, Boats, Aircraft, and Agricultural equipment. Spark ignition engine may operate on a 2-stroke cycle or 4-stroke cycle. In the 2-stroke cycle, there is one power stroke for each revolution of the crankshaft. In 4- stroke cycle there is one power stroke for every two revolutions of the crankshaft.

    Most SI engines operate on 4- stroke cycle. Operation of 4- stroke cycle is explained below:

    INTAKE STROKE

    The intake valve opens and the exhaust valve remains closed. The piston moves down in the cylinder. This action brings the combustible mixture of fuel and air from the carburetor to the cylinder.

    COMPRESSION STROKE

    Intake and exhaust valves closed. The combustible mixture in the cylinder is compressed by the upward movement of the piston.

    POWER STROKE

    Intake and exhaust valves are closed. The compressed combustible mixture is ignited by a spark plug, and the expanding gases force the piston downward.

    EXHAUST STROKE

    The exhaust valve opens and the Intake valve remains closed. Combustion gases are forced out through the exhaust valve by the upward movement of the piston.

    COMPRESSION IGNITION ENGINE

    The compression ignition engine works on the Diesel cycle. The compression ignition engine is rugged in construction. It is mostly used for heavy lorries, busses, and agricultural equipment. It is also used in power plants and marine propulsion equipment. CI’s engines also operate on 4- stroke cycle as SI engines do. In the compression-ignition engine, only air is inducted in the intake stroke. Air is compressed during the compression stroke, which increases the pressure and temperature of the air. At the end of the compression stroke fuel is injected into the hot compressed air, which ignites the fuel. No carburetor is used in the CI engine to prepare the fuel-air mixture for combustion. A fuel injection pump is used in the CI engine. In CI engines heat of compression of air ignites the fuel. The working of the diesel engine is in the following fig.

    Working of Diesel Engine

    Recent Articles

    OXYGEN IS AN ESSENTIAL ELEMENT FOR HUMAN BODY

    INTRODUCTION Oxygen is a medicinal element present in the atmosphere. Oxygen has many uses in health care. Oxygen has therapeutic use in hospital ICUs. Our...

    Water pollution and its effects on human life

      INTRODUCTION Water is a God-created commodity. It is in the purest form in clouds before falling on the earth. Water is crystal clear when it...

    GLOBAL WARMING: CAUSES AND EFFECTS 

      INTRODUCTION Global warming is a hot topic nowadays worldwide. It is being discussed in every place within society. It is discussed in the scientific community....

    WATER, WATER, EVERYWHERE!

      INTRODUCTION Water, water, everywhere is the term that was taught to us when we were in primary school. Magicians were to be called in school...

    URBANIZATION IMPACT ON WATER MANAGEMENT

    INTRODUCTION Urbanization is a global issue nowadays. All the countries in the world are facing the problem of urbanization. Urbanization means shifting people, from village...

    Related Stories

    Leave A Reply

    Please enter your comment!
    Please enter your name here

    Stay on op - Ge the daily news in your inbox