Articles Posted in the " Internal and External Engines " Category

  • COMBUSTION IN IC ENGINES, Ignition delay, Detonation, Knocking and Dopes

    COMBUSTION IN IC ENGINES, Ignition delay, Detonation, Knocking and Dopes

    COMBUSTION IN IC ENGINES Keywords: Ignition delay, Detonation, Knocking and Dopes  Combustion is rapid burning of the air fuel mixture (carbon + Oxygen and hydrogen + oxygen) to liberate heat energy. Combustion takes place differently in spark ignition engines and diesel engines Combustion in spark ignition engines (Petrol engines or gasoline engines) takes place by […]



  • HIGHLIGHTS OF IC ENGINE EMISSIONS: CO2, CO, Nox, SO2, PM and Unburnt Hydro-carbons

    HIGHLIGHTS OF IC ENGINE EMISSIONS: CO2, CO, Nox, SO2, PM and Unburnt Hydro-carbons

    HIGHLIGHTS OF IC ENGINE EMISSIONS Keywords: CO2, CO, Nox,SO2, PM and unburnt Hydro-carbons Emission of an IC engine is hot mixture of gases coming out of the engine. These emissions create pollution of the atmosphere. These emissions may contain Carbon dioxide (Co2), Carbon monoxide (Co), unburnt hydrocarbons (UBHC),Oxides of nitrogen (Nox), sulphur dioxide (SO2), Aldehydes, lead, water […]


  • HIGHLIGHTS OF SUPERCHARGING OF IC ENGINES AND TURBOCHARGERS

    HIGHLIGHTS OF SUPERCHARGING OF IC ENGINES AND TURBOCHARGERS

    HIGHLIGHTS OF SUPERCHARGING OF IC ENGINES AND TURBOCHARGERS The process of increasing the density of inlet air for increased output of power by the engine is called supercharging. Methods of supercharging are Engine driven superchargers Rotary blowers Centrifugal compressors Turbochargers driven by exhaust gases of the engine Advantages of supercharging Increase in power output Reduction […]


  • PERFORMANCE TESTING OF IC ENGINES

    PERFORMANCE TESTING OF IC ENGINES

    PERFORMANCE TESTING OF IC ENGINES Purpose of Testing The testing is carried out in order to verify the designed and developed engine to achieve the following objectives: To get and know information which is not possible by calculations To confirm the validity of the data and assumptions used in design To satisfy the customer of […]


  • HIGHLIGHTS OF INTERNAL COMBUSTION ENGINES

    HIGHLIGHTS OF INTERNAL COMBUSTION ENGINES

    HIGHLIGHTS OF INTERNAL COMBUSTION ENGINES In a two stroke cycle, there is one working stroke in one revolution. In a four stroke cycle, there is one working stroke in two revolutions. In the petrol or diesel engine, exhaust gases are forced out. This process is called Scavenging. In the four stroke engine , burnt gases […]


  • NUMERICAL PROBLEMS ON INTERNAL COMBUSTION ENGINES

    NUMERICAL PROBLEMS ON INTERNAL COMBUSTION ENGINES

    NUMERICAL PROBLEMS ON INTERNAL COMBUSTION ENGINES PROBLEM 1 The following data was recorded during testing of a TWO STROKE gas engine: Diameter of the piston                  d= 150 mm Stroke length                                     L= 180 mm Clearance volume                            Vc […]


  • OTTO CYCLE–INTRODUCTION

    OTTO CYCLE–INTRODUCTION

    OTTO CYCLE INTRODUCTION Otto Cycle is  known as 4 stroke cycle. Otto Cycle is used in internal combustion engines. The first engine based on Otto cycle was such engine was built by the German engineer Otto in 1861. FOUR STROKE OF THE OTTO CYCLE ARE SUCTION STROKE Piston moves outwards and Intake valve opens but […]


  • GAS POWER CYCLES—-INTRODUCTION

    GAS POWER CYCLES—-INTRODUCTION

    GAS POWER CYCLES   Definition A gas power cycle is one where the working substance is gas. In the analysis of gas power cycles.  We take the working substance as air  for simplicity. Thus these are also called Air Standard Cycles. LIST OF AIR STANDARD CYCLES Otto cycle: It is used in petrol engines. Diesel […]


  • COMPARISON OF COMBUSTION PROCESS OF SI AND CI ENGINES

    COMPARISON OF COMBUSTION PROCESS OF SI AND CI ENGINES

    COMPARISON OF COMBUSTION PROCESS OF SI AND CI ENGINES Combustion is a process of burning hydrogen and carbon in the fuel with oxygen. There are major differences in the combustion process in SI and CI engines. These have been tabulated below:     Sr. No. SI Engine CI Engine   1. There is a carburetor […]