Combustion engines

2010-02-09
Combustion engines are also called heat engines (Heat Engine Principle). Most vehicle engines are installed on fire engines belonging to the group. Fire engines are heat engines burn fuel, these engines are fuel energy converting heat energy creates energy apostate pressure cylinders are being exploited in the engine itself.
Combustion engines are divided into two groups, according to the location of the fire process:
Internal combustion engines engines that are fuel burning process in the body of the engine (for example, car engines gasoline and diesel, jet engine), there are many types of internal combustion engines, suitable for different types of applications.
External combustion engines engines that process the fuel is burned outside the engine body (eg steam engines).
Motor structure: The main parts are the engine components: cylinder, piston crank shook wave.
Combustion engines depend on fuel, fuel oil produced, converting fuel energy supplied to them is done through chemical process of rapid oxidation (which is actually a process of cremation). There are different types of fuel used and combustion engine: gasoline, diesel and natural gas refineries in different levels, they emit carbon dioxide oxygen.
All the fire engines thermodynamic cyclical process is also called the Otto cycle, cycle of four moves by Otto cycle:
Suction valve opens, a fresh mixture of air and fuel into cylinder crammed with piston, the suction valve is closed, the mixture is ignited by a spark plug fixed at the top of the cylinder, resulting in temperature and pressure of gas rises, the burned gases spread and push the piston down, resulting in pressure and temperature down, the exhaust valve opens, pushing the burned gases are emitted out of the cylinder will move the suction cylinder.
Twocycle moves by Otto cycle:
Two fire engine users simultaneously moves the cylinder space above the piston cavity crank this way can perform two simultaneous processes: the compression process: piston moving up and imprisoned mixture a top hat and crammed mixture comes to crank through the suction. Course of expansion the burned gases at the same time spread within the cylinder, piston moves down, gases are emitted out of the mixture were compressed in cylinder crank transmitted.