StudentShare solutions
Triangle menu

Cast versus forged engine pistons - Research Paper Example

Not dowloaded yet

Extract of sample
Cast versus forged engine pistons

Centrifugal casting has been used for the production of cylindrical parts since time immemorial. The two types of machines used to achieve these are broadly classified as horizontal and vertical types. The horizontal ones are named so because they usually rotate around a horizontal axis while the vertical ones rotate around a vertical one. The horizontal machines are typically used to make pistons and other castings that are simple in shape. The vertical machines are best suited for making castings that are not regular in shape (Soares, 22). The importance of pistons can not be bargained. In a typical engine, pistons are used in order to convert the thermal energy into mechanical energy. Pistons are used to convey the gas forces through the linking rods to the crank shaft. They are also used in order to seal off the combustion part against the possible gas leaks in the crankcase. In addition to preventing leakages, they also help to avert any possible infiltration of oil that might emanate from the crankcase into the combustion part of the system. Last but not least, pistons are used to release the heat absorbed as a result of the combustion thereby assisting in the function of the cooling oil. The pros and cons As we have observed, aluminium is a preferred material in pistons, whether one is using casting or forging. Aluminium has a high thermal conductivity which makes it a very ideal material for the job. The modern gasoline as well as diesel engines have created a need for the creation of pistons that are lighter in weight but at the same time that have a greater capacity of thermal load. This has been made possible due to the novel designs through the use of innovative coating technologies. Pistons are usually exposed to very robust conditions. The mechanical load that the pistons have to handle comes from the very high pressure in the combustion part. The pressure typically goes up to 200 bars. Another source of mechanical load is the extreme force of inertia. This is as a result of heightened acceleration of reciprocating motion pistons (Soares, 27). Pistons can either be produced from cast or from forged aluminium alloys. There are different types of alloys that are used in the casting or forging of pistons. The first type is the standard piston alloy. It is an eutectic Al-12% Si alloy. On average, it has at least one percent each of Cu, Mg and Ni. In order to meet the demands of the current modern engines, there have been special eutectic alloys developed in order to achieve better resistance to extreme conditions. The hypereutectic alloys typically have eighteen and twenty four percent of Si. They come with the advantage of lower thermal expansion but they have the disadvantage of lower strength. Developers of pistons usually have their own customizations in order to fit the different unique requirements but they are generally based on these underlying principles. Most of the pistons on the market are developed using the gravity die casting technique. One important advantage of casting is that the optimized alloys in conjuction with the controlled environemtn of production make the development of the pistons that are low in weight possible (Soares, 23). Forged pistons however, win over their casted counterparts when it comes to withstanding higher pressure. The forged ...Show more

Summary

Lecturer Date Cast versus forged engine pistons The suitability of structural materials is largely determined by the physical properties as well as the mechanical properties of the metal. Physical properties are only influenced by the chemical composition of the material while the mechanical characteristics are governed not only by the chemical composition but also by the microstructure of the metal…
Author : zelda46
Cast versus forged engine pistons essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the research paper on your topic
"Cast versus forged engine pistons"
with a personal 20% discount.
Grab the best paper

Related Essays

Twin Turbo Engine Repair
A typical turbocharger consists of a gas turbine coupled with a centrifugal compressor. Gas turbine is run by the high temperature exhaust gases obtained from the engine and drive the compressor. The compressor then compresses the charge (or air) and supplies it at high pressure to the intake manifold.
2 pages (500 words) Research Paper
Steam Engine
The paper basically aims at illuminating the reality of the claim that “the concept of stationary steam engines proposed first by Thomas Savery and later developed by Thomas Newcomen led to a major turning point in the history. Animal and human-based manual labor laid the foundation of the mills, factories, and mining.
12 pages (3000 words) Research Paper
Search Engine Optimization
As such, some of these strategies are approved, while others remain unapproved due to the use of inappropriate words used in optimization, or a breach inn search engine user policy, on the side of website administrators. Of these strategies, there is white hat and black hat, which are applied and evaluated in respect to the terms of use by search engines, where black hats are in contravention of terms, while white hats or pro convention of terms of use.
3 pages (750 words) Research Paper
V8 engine block assambley
The block is one of the largest parts of the engine and is where all of the other parts are mounted. The V8 engine can either be mounted on an engine stand or bolted directly into the vehicle and then assembled. Depending on which vehicle the engine is going in will depend
1 pages (250 words) Research Paper
History of Multi-Engine Flight
A multiengine consists of gas powered cabin heater in the nose. In November 1935, Donald W., the then president of aeronautical sciences addressed the aeronautical society of London. In his speech, he put emphasis on the
5 pages (1250 words) Research Paper
Turbine Engine Essay
Turbine engines are classified according to the compressors they use, which include ; When the air outward is accelerated, compression of air inlet is achieved in a centrifugal flow to longitudinal
4 pages (1000 words) Research Paper
Sadi Carnot & Heat Engine
However not all heat energy is converted to useful work as some are lost in form sound, friction and wear and tear of the machine parts. Therefore the rate at which any
7 pages (1750 words) Research Paper
Search engine marketing
extranet and air space communication and have enhanced cost effectiveness, more online bookings, price integrity and easy reach of targeted segments of customers (Kennedy & Hauksson, pg.67). Their major characteristics relate to speed, effectiveness and vast storage. Players
1 pages (250 words) Research Paper
Aircraft Engine Anti-Icing systems
This causes critical changes in the applied forces on the aircraft which can prove dangerous at most circumstances. The smooth flow of air is restricted which raises the drag forces and
12 pages (3000 words) Research Paper
SEO Search Engine Optimization
In general, websites that appear on top of the stack of the search will get more traffic and therefore more potential business (Lines). SEO is also more commonly known as the process where websites are ranked by search engines such Google,
2 pages (500 words) Research Paper
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Rate this paper:
Thank you! Your comment has been sent and will be posted after moderation