please tell me about piston crank mechanism?
485796
Follow the steps with reference to the webpage ...\n\nStep 1 Characteristics of air\n\nLet's fit a rubber to a can like Figure 1. You can understand easily that the rubber expands when the can is heated (Figure 2), and the rubber contracts when the can is cooled (Figure 3). It is caused that a pressure of the air in the can works to the rubber when the air is heated, shown in allows of Figure 2. Of course, you cannot see the pressure by your eyes.\n\n \nStep 2 What is a displacer piston?\n\nNext, let's put in a piston into the can like Figure 4. A diameter of the piston must be somewhat smaller than that of the can, because the piston works to move (displace) the air up and down in the can. And, please heat the bottom side of the can and cool the upper side of the can. After it has enough temperature difference, move the piston up and down by your hand. When the piston is moved up, the rubber expands because there is a lot of hot air in the can (Figure 5). It corresponds to Figure 2. When the piston is moved down, the rubber contracts because there is a lot of cold air in the can. It corresponds to Figure 3.\nIn the case of the Stirling engine, this piston, which moves (displaces) the air and make the pressure changes is called a displacer piston.\n\n \nStep 3 Crank mechanism ~ from piston motion to rotation ~\n\nDo you understand about the characteristics of the air and the work of the displacer piston? They are very important to understand how does the Stirling engine work.\nFirst, connect from the piston and a bent wire with a thread like Figure 6. When the bent wire is rotated, the piston is moved up and down. This is called a crank mechanism.\nPlease heat the bottom side of the can and cool the upper side of the can, similar to above description. When your hand rotates the bent wire, the piston is moved up and down, and the rubber expands and contracts repeatedly (Figure 7).\n\n \nStep 4 Power piston ~ function of the rubber ~\n\nThe Stirling engine converts from the motion of the rubber to the rotation of the bent wire. Please connect from the rubber to the bent wire with a rod. In this time, a force of the rubber (expansion and contraction) has to be the direction, which rotates the bent wire. In short, you must bend the bent wire the just right angle (90 degrees) from the piston like Figure 8 and 9.\n\n \nStep 5 Flywheel ~ for the smooth rotation ~\n\nThis engine has not worked yet. If you try to work this engine (Figure 8 and 9), the rubber keeps the most expansion or contraction. In order to rotate smoothly and repeatedly, you must fit a rotated mass with the bent wire. It is called a flywheel.\nGenerally, the flywheel is circular like Figure 10. But at this point, please bend the end of the bent wire, and fit a mass at the edge of the wire like Figure 11. The mass works as the flywheel and to be balanced to the weight of the piston. So, you must fit the mass against the piston.\n\nThis page of diagrams courtesy of Koichi Hirata.\n\nPlease click the link for the diagrams ...\nhttp://www.hotairengines.com/WorkingDescription/Work.htm\n\nWith Love\nsridhar
194412
go to http://en.wikipedia.org/wiki/Wankel_engine#How_it_works
664091
The reason is better burning of the fuel in four stroke engine.\n\nThe two strokes have a lower compression ratio. The piston  will start its compression at the point where it passes the exhaust and intake ports located halfway travel on the side of the cylinder.\n\nThe four stroke are more efficient due to higher compression ratio. The compression starts from the lowest point of the piston all the way up to the top of the cylinder.
44858
Pistons are good. But I also like camshafts, connecting rods, and cylinders.
861947
We rebuild cylinder heads from the small aluminum to large diesel, replacing valve guides, seats ... We rebuild cylinder heads from the small aluminum to large diesel, replacing valve guides ... Only place I found it listed was MSN Search besides references to it on Yahoo-answers (CompuServe, Netscape Netcenter, AOL Search). Try using freewebsubmission.com. Usually takes 6-8 weeks for a new site to get listed on Google see your site was modified 10/26/2006 4:33:46 PM so don't get exicited yet about it not being listed, save your money and just use free website submits the pay submits are a waste of money. do a search for my site keywords "Silver Moon Furniture" and see where I place at on Google. My contact information is all visable feel free to e-mail me if you have any questions
681821
I used to be a big 2 stroke fan and didn't want to jump on the 4 stroke (thumper) wagon but now I wouldn't go back. The 2 strokes are just as fast as the thumpers but they have a different kind of power. With the thumper I find it easier to ride, especially through turns and through technical stuff. It's a good usable power curve. They are also less maintnance. No gas mixing. No constant clutching (125cc). Longer gears. Low end power.
867717
Are you looking for a conversion kit to mount a small engine on your bike? Saw some on eBay. Try looking for it on the Internet. There is also a electric motor/battery kit available. Good luck!
4899
You are already stressing the components of the motor by almost doubling the cubic centimeters and in my opinion adding the extra horsepower of nitrous to a motor that wasn't ment for it would cause blown head gaskets, overheating and piston melt down. Those motors are touchy enough without the nitrous!
288936
.030 over - 355\n.030 over/w 400 crank - 383\n.030 over 400 block  - 406\n.030 over 400 block/w 350 crank - 377 (nice combo, BTW)\n.030 over 400 block/w 327 crank (3.25) about 350 ci
284498
they are a four stroke just like gas engines but gas engines are spark ignition and diesel engines are compression ignition, that is whey there is no spark plugs the heat from the piston compressing the air and fuel mixture gets to a point of explosion and boom down goes the piston and over and over it goes and away you go (Intake compression, power, exhaust)
460378
The basic theory is that if you pump steam into a place where there is a piston, the piston will move up.  Then you release the steam and the piston will go down.  You connect the piston to something to get movement, such as some gears that turn the propellers or connect them to the wheels.  It's a bit more complicated than that, but that's basically how it's done.
95627
i have study about this before 3 yrs but i will check my memory. this engine is called so because the fuel is burnt inside the combustion chamber means internally.it consists of a combustion chamber having an inlet valve so that fuel can enter inside the chamber and an outlet valve to forward the burnt fuel to the other stage. it also consist the piston which is one of the main parts of the engine without it we cant rotate the wheels. piston is also is in a closed cylinder which also have two valves andperform the same functions as they do in comb. chamb. after piston there is another cylinder which is used to throw out the exhausted fuel outside. i think this is enough
473616
Worn piston rings is usually the culprit. Lower combustion chamber pressure results in incomplete combustion as well as the worn rings allowing blowby into the crankcase. Worn valve guides can contribute to this as well. I'd say it was time for an overhaul or exchange.
996285
hi friend! it seems we share the same interest. i do not know which part of the world you r from. i am from India. i can surely provide you with the blue print of a rocket engie, jet engine and rciprocating engine. however i would need your e-mail address for that. mine is\nmangeshome1982@yahoo.co.in\nhope to hear from u soon. i have even designed a new model of piston engine which is a combination of both 2-stroke and 4-stroke engine. just informed you. might be that you could be interested to develop it with me.
466612
It's the past tense of 'to crank' in Tennessee.  Ex. The motor crunk, but didn't start.\n\nI know that's not what you're lookin' for, just thought it was funny.
432964
It is a car part...since Detroit is known for the car industry, it makes sense.  If you want to see what the part looks like, go here;\nhttp://en.wikipedia.org/wiki/Piston
355757
Four Stroke Bike Engine just like a car is as follows.\nThe Intake Stroke: \nOn the intake stroke, the intake valve has opened. The piston is moving down, and a mixture of air and vaporized fuel is being pushed by atmospheric pressure into the cylinder through the intake valve port. \n\nThe Compression Stroke: \n\nAfter the piston reaches the lower limit of its travel, it begins to move upward. As this happens, the intake valve closes. The exhaust valve is also closed, so the cylinder is sealed. As the piston moves upward, the air/fuel mixture is compressed. On some small high compression engines, by the time the piston reaches the top of its travel, the mixture is compressed to as little as one-tenth its original volume. Thus, the compression of the air/fuel mixture increases the pressure in the cylinder. The compression process also creates the air/fuel mixture to increase in temperature. \n\nThe Power Stroke: \nAs the piston reaches the top of its travel on the compression stroke, an electric spark is produced at the spark plug. The ignition system delivers a high voltage surge of electricity to the spark plug to create the spark. The spark ignites the air/fuel mixture. The mixture burns rapidly and cylinder pressure increases to as much as (600psi). All of this pressure against the piston forces it down in the cylinder. The power impulse is transmitted down through the piston, through the piston rod (connecting rod), and to the crankshaft. The crankshaft is rotated due to the force. \n\nThe Exhaust Stroke: \nAs the piston reaches the bottom of its travel, the exhaust valve opens. Now, as the piston moves up on the exhaust stroke, it forces the burned gases out of the cylinder through the exhaust port. When the piston reaches the top of its travel, the exhaust valve closes, and the intake valve opens. The cycle repeats again with the intake stroke. The four strokes are continuously repeated during the operation of the engine. \nThe system repeats itself until you cut the engine off.\n\nTwo Stroke Engine (Those load noisy dirt bikes)\n1st stroke: The piston is at the bottom of the cylinder. A pipe at the left side is opened and lets the fuel mixture, which is already compressed a bit, flow from the lower to the upper part of the cylinder. The fresh gases expulse now the exhaust through an ejection pipe, which is not closed by the piston at this moment.\n\n2nd stroke: After being hurried upward, the piston now covers the pipe on the left side and the ejection pipe. Because there is no way out any more, the upper, fresh gas mixture gets compressed now. At the same time in the part below fresh gas is taken in by the piston driving upward through the open suction pipe. At the upper dead-center, the compressed fuel mixture is ignited by the sparking plug, the piston is pressed downward while he compresses at the same time the fresh gas below. The process begins again as soon as the piston arrives at its lowest point.