| What is a 4-stroke diesel engine?As the name | | | | the piston reaches |
| suggests, these engines work on reciprocating | | | | |
| | | | slightly beyond the top dead center, the |
| | | | fuel has acquired the |
| actions of pistons. One stroke means one | | | | |
| linear motion of the | | | | temperature high enough for ignition.The |
| | | | fuel is supposed to burn so fast as to |
| piston in one direction. When the piston | | | | explode. So there is |
| moves in the opposite | | | | |
| | | | no point in injecting it more than it can |
| direction, that is counted as another | | | | burn. If the fuel is |
| stroke.For a 4-stroke engine, the piston has | | | | |
| to move up, then down, | | | | not able to catch fire, it will remain in |
| | | | the piston as unburnt |
| then up again, and then down again to | | | | |
| complete one cycle of the | | | | fuel.So the timing of the fuel injection |
| | | | will stop slightly after the |
| engine. In that 4 stroke of the piston, the | | | | |
| crankshaft will have | | | | piston has reached top dead center.The |
| | | | explosion inside the piston is the driving |
| turned 2 revolutions.The 4 strokes of the | | | | force for the |
| piston is to complete 4 stages of the | | | | |
| | | | engine. It will create the momentum to turn |
| combustion cycle. As you might have known, | | | | the engine for the |
| in order for a fire | | | | |
| | | | next 2 cycles.The next cycle is the exhaust |
| (or explosion) to occur to power the engine, | | | | stroke. In this stroke, all the |
| we need a fuel, a | | | | |
| | | | products of combustion is driven off from |
| heat source, and oxygen coming together at | | | | the piston top. The |
| the same time.At the start of the cycle, air | | | | |
| must be introduced into the | | | | exhaust valve(s) will have opened to allow |
| | | | the combustion gases |
| combustion space inside the cylinder. In the | | | | |
| 4-stroke (also | | | | to escape. In an ideal engine, these include |
| | | | carbon dioxide gas, |
| called 4-cycle) engine, this is the air | | | | |
| intake stroke. The | | | | water vapor and excess air.However, in |
| | | | actual practice, the combustion may not be so |
| piston moving down will suck fresh air into | | | | perfect. |
| the cylinder through | | | | |
| | | | Carbon particles, unburnt fuel particles, |
| the air inlet valve(s) that is opened.The | | | | lubricating oil |
| next stroke is the compression stroke. With | | | | |
| all the valves | | | | particles, sulphur dioxide, carbon monoxide, |
| | | | and ash may also be |
| at the cylinder head closed, the piston | | | | |
| moves up again. The air | | | | discharged. As the piston will not be able |
| | | | to reach the the |
| becomes compressed to a very high degree. So | | | | |
| high that the | | | | cylinder head perfectly, not all the exhaust |
| | | | gas can be driven |
| temperature of the air becomes sufficiently | | | | |
| hot to ignite a | | | | off completely. A small quantity of these |
| | | | exhaust products will |
| finely sprayed fuel mist on contact.That is | | | | |
| precisely what happens. Before the piston | | | | remain inside the cylinder even as the next |
| reaches the | | | | cycle starts.Once the exhaust gases have been |
| | | | driven off, the next stroke |
| top-dead center (the maximum height the | | | | |
| piston can reach before | | | | starts. This is the air intake stroke that |
| | | | we started off with. |
| coming down again), the fuel is injected as | | | | |
| a very fine mist | | | | The cycles repeat itself as the engine runs |
| | | | continuously.Obviously the more the exhaust |
| into combustion space at the piston top. In | | | | gas can be driven off, and the |
| order for this fuel | | | | |
| | | | more oxygen content the cylinder can |
| to be injected into the highly compressed | | | | contain, the more efficient |
| air inside the cylinder | | | | |
| | | | the combustion of the fuel can be |
| the fuel itself must be at a higher | | | | achieved.This can be achieved by |
| pressure. This is achieved by | | | | supercharging and cooling the air intake.Well |
| | | | folks, that should boost up your power! |
| a fuel pump.There is a reason for injecting | | | | Meanwhile look for |
| the fuel slightly before the | | | | |
| | | | the best tools for the job.Many years of |
| piston reaches top dead center. The fuel | | | | working experience in Marine, Facilities, |
| takes some time to reach | | | | |
| | | | Construction has given the author material |
| the temperature that it can burn. So the | | | | for writing e-books |
| timing of the injection | | | | |
| | | | and articles related to engineering, and |
| of the fuel is adjusted so that by the time | | | | management. |