Ic Engine Essay

A mixture of fuel and air within each cylinder is ignited by a spark from the spark plug. As the fuel combusts, it goes a chemical reaction, yielding gaseous byproducts. Gasoline can only burn if it is in a vapor. The chemical equation for the combustion of the octane within gasoline is: 2 C8H18(g) + 25 O2 Þ 16 CO2(g) + 18H2O(g).” (Science Of NASCAR) The gases the begin to expand, this expansion pushes against the piston, causing it to move downward. Each of the following eight cylinders will then fire, and once all eight cylinders fire, the process repeats itself over again. Indy cars use pure Methanol (CH3OH), while NASCAR’s use the same fuel as your everyday car a “leaded 110-octane gasoline. The lead is in the form of a compound known as tetraethyl lead (Pb(CH2CH3)4).”(Science of Nascar) A small amount of Pb(CH2CH3)4 which is Tetraethyllead this is used to keep the gas from igniting when compressed. Octane, C8H18 (sometimes called noctane or normal octane), is a hydrocarbon that can be compressed fairly well without igniting. Isooctane is an isomer of octane, it’s better at being compressed without igniting, so it’s used in regular gasoline and is given the value of 100 in the octane rating

The continuing rotation of the crankshaft drives the piston back up, ready for the next cycle. The piston moves in a reciprocating motion, which is converted into circular motion of the crankshaft, which ultimately propels the car. Gas engines usually have about the same about of horsepower as they do torque. The diesel engine usually has twice as much torque as it does horsepower, thus it is the better hill climber and load carrier.

Thesis Statement: Internal combustion engines are very important to today 's society, the four stroke engine is the most popular and important due to it long history of achievement and durability.

On the intake stroke, the intake valve has opened. (The intake valve is the opening that the air and fuel are released into the cylinder) The piston is moving down, and a mixture of air and vaporized fuel is being

A. A gas engine uses spark to ignite gasoline while a diesel engine uses compressed air to ignite the diesel fuel.

Tires squealing, superchargers whining, turbos screaming as the air is forced to mix with fuel. A concoction resulting in immense, intense power from what some would call a box of metal. A meaningless, mass produced, grocery getter. However, these stereotypes are not true, due to one attribute. When that pedal touches the floor, magic is in progress, and pure, raw, unkempt power is unleashed. Air and fuel forced to mix, as if they were great enemies fighting one another. The spark plugs, igniting the furious battle between them, causes an earth shaking explosion. The pistons scream as the energy forces them to slam downwards, turning the ever-mighty crankshaft. The energy rushes through the flywheel, turning the many transmission gears, funneling angry horsepower through the drive shaft. The rear axle is the surrogate through which the tires squeal, launching the car down a ¼ mile track in under 10 seconds.

A car fueled by a typical gasoline engine runs differently than an electric. Instead of having a battery to power the engine, the car uses an internal combustion unit to propel the car. The gasoline that the owner adds to the vehicle is heated by the combustion unit and is mixed with oxygen to power the engine. When the driver pushes the pedal down, that activates the combustion unit.

7). The combustion increases the temperature of the exhaust gases, any residual air in the combustion chamber, and the combustion chamber itself. From the ideal gas law, the increased temperature of the gases also produces an increased pressure in the combustion chamber; the high pressure of the gases acting on the face of the piston cause the piston to move to which initiates the power stroke (para. 8). Unlike the compression stroke, the hot gas does work on the piston during the power stroke. The force on the piston is transmitted by the piston rod to the crankshaft, where the linear motion of the piston is converted to angular motion of the crankshaft. Hall’s article for NASA states that the work done on the piston is then used to turn the shaft (para. 8). Having produced the igniting spark, the electrical contact remains opened. During the power stroke, the volume occupied by the gases is increased because of the piston motion and no heat is transferred to the fuel/air mixture (para. 9). As the volume is increased because of the piston 's motion, the pressure and temperature of the gas are decreased. Heat that is left over from the power stroke is now transferred to the water in the water jacket until the pressure approaches atmospheric pressure; the

An automotive engine extracts work from its chemical fuel by burning that fuel inside its cylinders and making the resulting burned gas do work on the engine. Most engines have at least four cylinders, each of which requires four strokes of the piston to extract work from the fuel. During the induction stroke, a piston moves out of the cylinder and the fuel and air enter it. During the compression stroke, the piston moves into the cylinder, compressing this fuel-air mixture to high density, pressure and temperature. An electric spark then ignites the mixture and converts it into extremely hot burned gas. During the power stroke, the piston again moves out of the cylinder while the hot gas does work on it. This work is what powers the car. Finally, during the exhaust stroke, the piston moves into the cylinder and

In today’s world there are many different engines that gets assembled in vehicles. The main difference in the engines are if they are gas or if they are diesel. While bearing some minor similarities, the differences between gas and diesel are remarkable.

To Invent The Auto Age analyzes how the internal combustion engine, a “theory looking for an

To understand how it works one must recall how a person draws juice from its container. The pressure drops in the straw as air flows in a particular speed toward the person. It causes the juice to flow towards the mouth of the person. The same thing happens inside the fuel jet. The fuel will enter the venturi, as it does it expand to make a fine spray. It expands due to the change in the cross-sectional area it transverse. What happens here is akin to what happens with a spray gun or a flexible hose. The liquid passes through a narrow pathway with a low fluid pressure and high fluid velocity. As it comes out the opening the fluid the pathway broadens; thus, its pressure rises and its velocity drops. The force it exerts on the side of the pathway causes it to expand once it's out the nozzle creating a fine spray. The fuel jet creates the same spray at the side of the venturi. This fine spray mixes with the air flowing into the venturi. As the mixture flows past the venturi the pressure rises and the fuel and air get better mixed in a wider cross-section of the tube. The stoichiometric mixture would flow past the throttle valve and then enter the intake manifold of the

Next is the compression stage, the crankshaft and connector rod following a circular motion causes the piston to move upward within the cylinder, the valves are closed and the volume begins to decrease which compresses the fuel air mixture. Increasing both pressure and temperature of the mixture within the cylinder.

That covers the basic function of an engine fron intake to exhaust. Next we will explore the relationship of Horsepower vs Torque.

Hence, it is an urgent need for a country like India to search for an option to run CI engine using a different fuel than the conventional and petroleum based diesel and recently biodiesel, as CI engine fuel alternative, has received more attention among many other possible options. Biodiesel has also