What is an engine ?An Engine is any machine that converts power into motion.-Converts energy uses the energy to-Create Mechanical Motion
What Components Make up an Engine???• Components are different for every different type of engine but some of the most common components are:- The spark Plug- The Valves- The Piston- Piston Rings- Connecting rods- The CrankShaft- The Sump
• The Spark Plug – Supplies the Spark that ignites the fuel/air so the combustion can occur• The Valves – Let in air at the correct time to let our exhaust• The Piston – is a cylindrical piece of metal the moves inside the cylinder• The Piston rings – provide a sliding seal between the outer and inter parts of the piston
The connecting rod – connects the piston to the CrankshaftThe Crankshaft – turns the pistons in their motion( it works similar – Jack in the Box)The Sump – Surrounds the Crankshaft and contains oil
Combustion Engines AND HOW THEY Work…Also known as a heat engines, combustion engines are driven by the heat of the combustion processWhat is a Combustion?
A Combustion is…a sequence of exothermic chemical reactions between a fuel and an oxidant.The reactants of a Combustion reaction always yields:H20, CO2 and Energy
Three Types of Combustion Engines1. Internal Combustion Engine4. External Combustion Engine7. Air-Breathing Combustion Engine
Internal Combustion EnginesAn internal combustion engine is an engine in which the combustion of a fuel (usually a fossil fuel) occurs with an oxidizer (usually air) Oxygen (H20) -High temperature and high pressure gases, which are produced by the combustion, directly applies force to components of the engine. -pistons or turbine blades or a nozzle
The Four “Strokes”• Intake stroke - Air and vaporised fuel are drawn in.• Compression stroke - Fuel vapor and air are compressed and ignited.• Power stroke - Fuel combusts and piston is pushed downwards.• Exhaust stroke - Exhaust is driven out.
Where do we see InternalCombustion Engines in our World?The majority of all engines are actually Internal Combustion engines even though many other engines are being introduced and used now-a-days.- Seen in all of our cars- Most of everything else
External Combustion EnginesAn external combustion engine is a heat engine where an (internal) working fluid is heated by combustion in an external source -heat exchanger -engine wallIt is sometimes considered a more efficient version of an Internal Combustion energyOne example is the…
Stirling Combustion EngineA Stirling engine is a heat engine operating by compression and expansion of air or other gas-encloses a fixed quantity of permanently gaseous fluid such as air.
Air-Breathing Combustion Engines-Air-breathing engines are combustion engines that use the oxygen (H20) in atmospheric air to burn the fuel carried.Typical air-breathing engines include: Reciprocating Engines Steam Engines Gas Turbines Pulse Detonation Engines Turbo-propeller Engines
Non-Combustive Heat Engines-Some engines convert heat from noncombustive processes into mechanical work, for example a nuclear power plant uses the heat from the nuclear reaction to produce steam and drive a steam engine, or a gas turbine in a rocket engine may be driven by decomposing hydrogen peroxideNon-Combustive Heat engines are built in a similar form as Combustive Heat engines even though they work in a totally different way.
Engines’ effect on our worldThere are Good and Bad Effects on our World
Positive Effects- The use of engines makes transportation almost simple for those that can afford it- Many everyday items and objects we use on a regular basis are actually run on engines.
Negative EffectsEngines typically have a negative effect on the environmentSome things that engines do to ruin the environment are:- Pollutes air and lowers air quality- Negatively affects ambient sound levels.- The Poisonous Exhaust
The Exhaust of an EngineExhaust from a engine consists of many gases including:N, Water Vapor, C02, H, O, Carbon Monoxide, and many other compound and carbons.The Carbon Monoxide (CO) exhaust from the engine is a very poisonous and toxic gas.The CO can harm both Humans and other things in Nature.- If a running engine that releases Carbon Monoxide is in an enclosed area and is not shut off, It may contaminate the room possibly killing anything in the room- This horrible cause of death that contaminates the lungs has been a leading cause for suicide and has killed many other people by accident
A video on the assembling and parts creation of an Enginehttp://www.youtube.com/watch?v=lsDoT2oVQUQ