four stroke engine

FOUR STROKE ENGINE:
     FOUR STROKE ENGINE is an internal combustion engine in which the piston moves up and down or complete four separate cycles to complete the combustion process.The piston moves up and down by the revolution of crankshaft, The four separate terms as
                    1.suction or intake
                    2.compression
                    3.expansion or power stroke
                    4.exhaust
petrol engine or SI engine
diesel engine
SUCTION:
    The vacuum is produce into the cylinder by moving the piston from TDC (top dead center) to BDC (bottom dead center) where the air-fuel mixture being sucked into the cylinder through inlet valve .

COMPRESSION:
      It starts at the end of the suction stroke or the piston moves from BDC to TDC where intake and exhaust valve are closed,the air-fuel mixture compress into the cylinder during the stroke which leads to increase in pressure and temperature.

POWER STROKE:
       After compression of air-fuel mixture, the crankshaft rotates 360deg revolution.the piston moves from BDC to TDC ignites the air-fuel ratio by sparkplug (in petrol engine) or by heat generated by high ccompression, forcibly return the piston at BDC.

EXHAUST:
     The piston returns from BDC to TDC removing the unnecessary gases through exhaust port.
   

Comments

Post a Comment

Popular posts from this blog

parts of engine

Image
ENGINE :        An engine is a machine designed to convert one form of energy i.e.,chemical energy of fuel in to mechanical energy by the expansion of gases through burning of fuel in combustion chamber to extract work from pressure twin engine BASIC PARTS OF THE ENGINE: Engine parts    CYLINDER BLOCK: Cylinder is a of hollow type in which the combustion takes place and other components are present in it.  CYLINDER HEAD: It is used to cover the hollow space(cylinder) or components  present in the cylinder  CAM: CAM are used to control the opening and closing motion of the inlet and outlet ports. SPARK PLUG: It is used in spark ignition engine in which it ignites the air-fuel mixture in the cylinder. PISTON: It is a reciprocating component which uses to and fro motion to compress the air-fuel mixture and it is connected by crank shaft through connecting rod which converts rotary motion into reciprocating motion. PIS...
Read more

Engines

Image
ENGINE:              An engine is a device that converts energy into mechanical power to perform a specific task, such as propelling a vehicle, generating electricity, or powering a machine. There are many types of engines, including internal combustion engines, turbines, and electric motors, which work on different principles and use various forms of energy. The choice of engine depends on the application and the desired performance criteria, such as power, efficiency, and emissions. . PRINCIPLE:                 The basic principle of an engine is to convert energy stored in fuel into useful mechanical work. This is typically done by burning the fuel in a controlled manner to generate heat, which is then used to power a piston or turbine that moves to perform work. In an internal combustion engine, for example, fuel is mixed with air and ignited in a combustion chamber, generating high-pressure and high-temper...
Read more