Basic Parts of the Gasoline Engine are listed below/Why not diesel engines are not preferred in commercial?/Advantages diesel engines.

Basic Parts of the Gasoline Engine:

Basic Parts of the Gasoline Engine are listed below:

1. Cylinder block

2. Piston

3. Piston rings

4. Piston pin

5. Connecting rod

6. Crankshaft

7. Cylinder head

8. Intake valve

9. Exhaust valve

10. Camshaft

11. Timing gears

12. Spark plug

Cylinder Block:

      Cylinder Block is the Basic frame of gasoline engine. Contains the cylinder.

Piston:

      Piston is a sliding plug that harnesses the force of the burning gases in the cylinder.

Piston Rings:

      Piston rings seal the compression gases above the piston keep the oil below the piston rings.

Piston Pins:

      Piston Pins Also known as the wrist pin, it connects the piston to the small end of the connecting rod. It transfers the force and allows the rod to swing back and forth.

Connecting Rod:

      Connecting Rod Connects the piston and piston pin to the crankshaft.

Crankshaft:

      Crankshaft Along the piston pin and connecting rod it converts the up and down motion (reciprocating) of the engine to spinning (rotary) motion.

Flywheel:

     Flywheel Carries the inertia when there is no power stroke.

Cylinder Head:

     Cylinder Head Forms the top of the combustion chamber. Contains the valves, the passage ways for the fuel mixture to move in and out of the engine.

Intake and Exhaust Valves:

      Intake and Exhaust Valves Doorway that lets the gases in and out of the engine.

Camshaft:

      Camshaft Through the use of an eccentric the cam lobes push the valves open. The valve springs close them.

Timing Gears:

       Timing Gears These gears drive the camshaft from the crankshaft.

Fly Wheel:

      The net torque imparted to the crankshaft during one complete cycle of operation of the engine fluctuates causing a change in the angular velocity of the shaft. In order to achieve a uniform torque an inertia mass in the form of a wheel is attached to the output shaft and this wheel is called the flywheel.

Why not diesel engines are not preferred in commercial?:

1. Diesel engines, because they have much higher compression ratios (20:1 for a typical diesel vs. 8:1 for a typical gasoline engine), tend to be heavier than an equivalent gasoline engine.

2. Diesel engines also tend to be more expensive.

3. Diesel engines, because of the weight and compression ratio, tend to have lower maximum RPM ranges than gasoline engines. This makes diesel engines high torque rather than high horsepower, and that tends to make diesel cars slow in terms of acceleration.

4. Diesel engines must be fuel injected, and in the past fuel injection was expensive and less reliable

5. Diesel engines tend to produce more smoke.

6. Diesel engines are harder to start in cold weather, and if they contain glow plugs, diesel engines can require you to wait before starting the engine so the glow plugs can heat up.

7. Diesel engines are much noisier and tend to vibrate.

8. Diesel fuel is less readily available than gasoline

Advantages diesel engines:

       The two things working in favour of diesel engines are better fuel economy and longer engine life. Both of these advantages mean that, over the life of the engine, you will tend to save money with a diesel.

    

      However, you also have to take the initial high cost of the engine into account. You have to own and operate a diesel engine for a fairly long time before the fuel economy overcomes the increased purchase price of the engine.

     The equation works great in a big diesel tractor-trailer rig that is running 400 miles every day, but it is not nearly so beneficial in a passenger car.