Diesel Engine Spark Ignition Cylinder Fuel
Diesel engines are used primarily for heavy duty work. There are two fundamental forms of internal combustion engines, and these are diesel and gasoline engines. A gasoline engine otherwise known as a spark ignition engine is found within most automobiles i.e. cars. It employs electricity the combination of a spark plug to ignite the engine's fuel and air mixture in cylinders of the engine. On the other hand a diesel engine is known as a compression ignition engine which uses compressed air within the engine cylinders because the temperature of the air to increase. The fuel which is injected into the compressed hot air ignites immediately. Here the chemical energy which is stored in the fuel, during the combustion process is then converted to thermal energy.
The temperature within the cylinder will increase exponentially to a maximum of 4500°F further establishing pressures of up to 1500 pounds per square inch. This pressure then forces itself against the pistons top in which will drive them to the opposite end of the cylinders used throughout the process. These pistons are attached by a rod to a device like crankshaft which turns continuously.
Through this process the diesel engine will supply additional rotary power to power automobiles and other mechanized devices. There must be a certain temperature high enough to ignite the fuel. This largely depends on the level of work performed by the piston in compressing the air in which will later determine the temperature of the compressed air. When the Pistons compression stroke is near the end fuel is then to be injected into the engines working cylinders.
As a requirement for the air in fuel to incorporate itself well the fuel is to be inserted under high enough pressure such as a spray. The combustion process usually begins before the piston finishes its compression stroke processes. A process known as supercharging is used to increase the power of diesel engines which forces pressurized air into the engine cylinder. Engines of the diesel kind are known to have high levels of thermal efficiency which simply means they possess the capability to convert inventoried chemical energy within the fuel into work i.e. mechanical energy.
When speaking of spark ignition engines throttle determines the level of power which will be produced as well regulating the amount of air and fuel which comes into the cylinder. This throttle may function in a narrowly position most of the time, therefore decreasing the engines air intake as well efficiency. Diesel engines on the other hand do not need a throttle, which makes them more efficient than those engines of the gasoline kind.
