Assignment

Charles Law

Jacques Charles

(November 12, 1746 – November 7, 1823)

Jacques Charles was born in Beaugency sur Lorie in 1746, he was married to Julie Francoise Bouchaud des Herettes, she was 37 years younger than charles. He was thought to be very personally intellectual with the opposite sex as well. Charles and his assistance the Robert brothers made the worlds first hydrogen filled baloon in august 1783.

Charle's Law is known as the law of volumes states how gases expand when they are heated in constant temperature.

In 1787 Charles did an experiment where 5 balloons were filled with the same volume but with different gases and were all raised to a constant temperature of 80 °C. He saw that they all increased in volume by the same amount. This just show us the relationship between volume and temperature of a gas. Charles' Law describes that under constant pressure, a gas volume is proportional to its absolute temperature. The gas volume under constant pressure will increase linearly with the temperature of the gas. The formula he created was V₁/T₁ = V₂/T₂.


 Charles created a law known as the charles law on gas. It explains how the gas expands when it's heated. Also at constant pressure, the volume (Gas) will increases or decreases relative to the temperture, depending on weather the temperture will increase or decrease. For example if the temerture increased the gas will expand.
which can be written as:

where V is the volume of the gas; and T is the temperture. The law can also be expressed as follows:

This equation shows us that, as temperature increases, the volume of the gas will also relatively increase in proportion.

What is taper and ovality in the bore, how is it caused how do you check it?

What is side clearance on a piston and how is it checked? 

How can you tell the difference between a inlet and exhaust vavle and why?























What sort of tempatures do the inlet and exhaust valves get up to?

















What temperatures and speeds must the piston be able to cope with?



















Why do we have piston ring end gap clearance ?















What could the result be if the piston ring end gap is too small?











Why do aluminum cylinder heads usually have a steel shim (washer) between the valve spring and the cylinder head surface ?











What is meant by the terms S.I and C.I in a four stroke engine?











7/4/11 What is the purpose of the margin on the valve?













What is the purpose of a core plug?

What is end float and run out on a crankshaft, hows is measured?

                                                           Dismantling the engine

                                                            

                                                     TIMING GEARS AND IDLERS

                                                      CAM BELT,HEAD GASKET

                                           MEASURING CRANKSHAFT DEFLECTION

                                                     CODY REASSEMBLING HEAD

                                          REMOVED FROST PLUG.FROST PLUG HOLE.

                                                 CHECKING PISTON RING END GAP.

how a four stroke engine works..

How Does A Four Stroke Engine Work???

A four stroke engine works through creating power through the four stroke cycle inside the engine cylinders. Engine cylinders (bore) is where the four stroke cycle takes place in. Cylinder's are in the blocks. The hole in the cylinder is called the bore. In order to find out how a four stroke engine works you first need to know what the four strokes are and when they take place and how they take place and what the result of each stroke is. A stroke is one complete down or one complete up movement of the piston, (piston movement from T.D.C to B.D.C)The four stroke's in the four stroke cycle are intake, compression, power, exhaust.

In the Intake Stroke air fuel mixture is suked in through the intake port (valve) which is on top of the cylinder in to to the chamber (cylinder) when the piston is moving down. The exhaust port is closed. The ports (valves) are opened and closed through the lifter resting on camshaft. As the cam turns the lifters get lifted and put back down. The cam is turned by it being connected to the crank by the cam belt. And as the cam shaft gear is bigger it turns at half the speed of the crank.

Once the piston reaches B.D.C the top half of the cylinder is filled with the as much air-fuel mixture it can take which is ready to be compressed. Only the top half gets filled as the piston rings prevent air-fuel mixture going to the bottom through the edges of piston. At this point the inlet valve gets closed up.this is the end of the INTAKE stroke.

Now the piston starts to travel upwards to T.D.C which starts the COMPRESSION stroke. As the piston rises up it compresses the air fuel, at this point both intake and exhaust ports are closed.

Just before T.D.C spark plug ignites air-fuel mixture through ignition system sending a high voltage to spark plug. BANG. Because of air-fuel mixture igniting their is a release of heat and because of pressure send's the piston back down. This is the POWER stroke.

Once the piston reaches B.D.C again the EXHAUST valve opens up releasing pressure inside the cylinder. Piston starts to move up and pushes burnt gases out through the exhaust port through to the exhaust system. This is the EXHAUST stroke.

Once the piston reaches T.D.C the exhaust port closes and inlet valve opens up, and we come back to the INTAKE stroke.

The first practical four stroke piston cycle internal combustion engine was created by a man named Nicolaus Otto in May 1876.

Refrences: http://inventors.about.com/library/inventors/blotto.htm
www.youtube.com/watch?v=_y6PS-2j2U9