refers to a diesel engine as a diesel fuel, the chemical energy into mechanical energy of the heat engine.
1. What diesel engine is
Diesel engine operating cycle gasoline engine has many of the same places, but ignition gasoline engine different from a diesel engine cylinder gas mixture is compression ignition, but not ignited.
2. Advantages of a diesel engine
– to have a greater displacement at the same torque.
good
· economic performance.
3. Disadvantage diesel engine
· bulky than gasoline.
· Working noisy.
* higher manufacturing costs than the gasoline engine, is not easy to repair.
· winter cold start problems.
· soot particle emissions (PM) more.
4. The diesel engine works
is produced by the combustion within the diesel cylinder kinetic energy to drive the toggle mechanism connected to the piston, a reciprocating circular motion around the crankshaft and the power output, four stroke diesel engine by an intake, compression, power, exhaust four stroke (stroke) composition.
of the intake stroke of the piston is driven by the crankshaft by a stopMoving down the top dead center point, while the intake valve opening, exhaust valve closing.
When the piston top dead center from the bottom dead center moves, the volume above the piston increases, the gas pressure in the cylinder drops, a certain degree of vacuum.
Since the intake valve opening, intake pipe communicating with the cylinder, the fresh air drawn into the cylinder.
When the piston moves to the bottom dead center, the cylinder is filled with fresh air.
the compression stroke of the piston moves from the bottom dead center to top dead center, intake and exhaust valves closed.
crankshaft driven under the influence of flywheel rotation inertia force, by pushing upward movement of the piston rod, the volume of gas in the cylinder is gradually reduced, the gas is compressed, air pressure and temperature within the cylinder was dramatically increased (up to a temperature of 600 -700C °).
At this time, the power stroke, while closing the intake and exhaust valves, temperature in the cylinder, a sharp rise in pressure, at this time the cylinder temperature is much higher than the ignition diesel injector fuel injected into the cylinder at high temperature, the case where high pressure air is mixed with the diesel combustion itself and immediately push the piston moves downward, through the connecting rod rotates the crankshaft.
the exhaust stroke the exhaust valve opens, the piston moves from the bottom dead center to the top dead center, the exhaust gas with the piston upward, the cylinder is discharged.