Engineering Magazines

It has been 114 years since Rudolph Diesel applied for a patent for his new improved engine. It was hoped to replace the gasoline engine but as we can all see that this has not happened. The gasoline engine having just been invented in 1876 was still considered inefficient in fuel consumption and power. An evaluation of each engine’s performance tells a story that is difficult to reconcile with the way things have shaken out in the beginning of the 21st Century. The invention of the Diesel offered the world a far more efficient and effective fuel based engine. It actually provides more horsepower per gallon or liter than a gasoline. This is why diesel engines power our large earth moving equipment, trucks, marine engines, low mileage cars and now aircraft.

The diesel is a combustion injection engine. Unlike the gasoline engine, air is compressed first and then the fuel is injected into it. The compressed air is hot enough to ignite the diesel fuel without the use of a sparkplug. Diesel engines developed out of the earlier work surrounding two engines; the original diesel design and the solid injection system of Herbert Akroyd Stuart created in his hot bulb engine. This means that the upward stroke of the diesel engine compresses the air to where its’ temperature is between 1300-1650° F. When the piston has reached the top of its’ upward stroke, diesel fuel is then injected, combustion occurs, pressure increases and pushes the cylinder downwards. This motion is transmitted by means of the connecting rods to the crankshaft which itself turns thus transmitting rotating power to a drive shaft which powers ships, cars, generators, aircraft and even motorcycles.

During cold weather, diesel fuel thickens when the wax crystallizes. It becomes a gel and the fuel injection will not easily work. Technological advances have made this a problem of the past. The fuel lines and fuel filter can be pre-warmed, others use a glow plug in the combustion chamber to pre-heat its’ walls, some use resistive heaters in the intake manifold to warm air taken into the combustion chambers and engine block heaters are used in areas like Kansas or Nebraska when automobiles are left in the cold overnight.

Diesel engine speed used to be controlled by governing the rate of fuel through a gear system. Today the use of electronically controlled engines ECM (electronic control module) allows diesel engines to adjust their timing to start according to the environmental conditions of heat and cold, regulate the engine speed in terms of RPM (revolutions per minute) and maintain fuel economy.

Diesel engines may not have beaten its’ chief contender, the gasoline engine, but it has kept ahead in terms of heavy machine and naval engines. It has recently performed outstandingly in the area of remotely piloted vehicle engines, set amazing land speed records for racecars and motorcycles. The diesel engine has improved amazingly in the past 114 years. The use of electronics has given all engines abilities of fuel conservation unheard of in past years. This makes the diesel engine a real budget-winning contender. This year the new 2006, Volkswagen diesel won fourth place in the best mileage evaluation according to http://www.fueleconomy.gov. Diesels may prove to be the green vehicle engine of choice in the future since they have very little carbon monoxide emissions. Catalytic converters and diesel particulate air filters have made diesel engines free from particulate, nitrogen and sulfur oxides. Diesel engines may prove to be the easiest solution to greenhouse gases.

Getting your site listed in search engines and directories is an important part of building a successful site. Most people tend to think of search directories and engines as one in the same. However, they are actually both quite different. The only similarity between the two, in fact, is that they both serve the same purpose: to help people find web sites of interest to them

Search Engines: By far the most popular search engine around is Google. Other search engines include Lorming, Inktomi, AltaVista, AlltheWeb, and MSN.

Directories: Probably the most popular example of a directory is Yahoo. Other directories include Open Directory Project (dmoz.org) and Gimpsy.

The Differences between Search Engines and Directories

Difference #1: Search engines are run by robots; directories are run by human editors

The most notable difference between search engines and directories is that search engines aren’t updated by human editors like directories are. Instead, search engines are updated bi-monthly or monthly by robots—spiders and crawlers. What are spiders and crawlers? They are programs written by programmers at a particular search engine that basically locate a page, browse it, and then report whatever it finds back to the search engine’s database. What is found is then listed on the search engine.

Directories, on the other hand, are completely updated by human editors. What usually happens is that a person submits their site to the directory and then the editor will visit the site and see whether or not it is worthy of being listed in the directory. If it is, it will be grouped with other relevant sites in the directory. If not, it won’t be listed at all. Directories are typically harder to get listed in than search engines are for this reason. Human editors won’t allow in unworthy sites; search engine bots will. Directories are usually updated very frequently by the editors.

Difference #2: Search engines are free to get listed in; some directories are not. Many directories charge money for each submission. Search engines never charge a dime because their bots are solely responsible for listing web sites. There are, however, free directories which you can submit your site to.

Difference #3: Search engines are more popular and more used. People want convenience. Search engines offer this. All people have to do is type in a keyword into the search engine and relevant sites come up. Those who use directories have to go through the hassle of going through categories and sub-categories. This takes time and patience, both things that many busy people just don’t have.

Difference #4: Directories have listings grouped together by topic; search engines can sometimes be disorganized. When someone visits a directory, all they have to do is choose a category that interests them. Then, all the sites are relevant to that category will come up on the page. While search engines are usually effective, unrelated listings can sometimes come up in a search for a particular thing. There’s nothing worse than doing a search for cars and having an unrelated listing for cats come up. Unfortunately, this is occasionally the case with search engines because they are updated by robots, not humans.

Why are Search engines and Directories important to your site? There are a few reasons for why both are important to your site’s traffic. The most obvious reason is that the more you are listed, the more likely it is people will visit your site. If people see your site in both search engines and directories, they are more likely to visit it than if they just saw it in a search engine.

Even though directories aren’t as popular now, they are still well-used by people because they neatly group together sites in a particular category. So if you run an online web design business and are listed in the web design category of the directory, everyone who looks for web design in that directory will see your site.

Search engines are also important to your site because they will show your site if a particular keyword(s) is typed into the engine. If your site is listed in both directories and search engines, you will have more traffic than if your site were listed in one or the other.

Be sure to do whatever it takes to ensure that your site gets listed in both and you will reap the benefits.

Search engine bots and easy directory submission make it quick and painless for your site to get maximum exposure from both of these wonderful tools. So go ahead and take the steps necessary to get listed!

Your car is a very important investment that you would never want it to experience a breakdown especially if it is new and you are also new as a driver.

Aside from your parents’ pieces of advice on road safety, it is also better to read some tips on the magazines or on the internet perhaps. Your parents may be experts on raising kids but they may not be when it comes to vehicular concerns. There are several write ups on car safety, repair and maintenance that you as a neophyte on the road should always keep in mind.

Examples of these tips are as follows:

Read your owner’s manual first. Written there is everything about your car that you need to know and remember always. From the auto parts to the proper repair and maintenance, all are written there. It is also important to obey the manufacturer’s recommended service schedule as written there.

To ensure excellent engine performance, at a good repair shop, have your engine drivability problems corrected. These problems include hard starts, rough idling, stalling, diminished power, etc. It is also much better to replace dirty air, fuel and PCV fuels to ensure a real quality engine performance.

In order to keep moisture from freezing in the fuel line, place a bottle of fuel de-icer in your fuel tank once a month. Remember that moisture formation is prevented in a gas tank that is always filled.

The oil and filter concerns are also specified in your owner’s manual. Change them according to the stated schedule. Most often, they are changed at least every 3,000 miles. This is so if driving is mostly stop-and-go or consists of regular short trips.

Flush and refill the cooling system as recommended in the manual. Needed to be inspected periodically are the level, condition, and the concentration of the coolant. The usually recommended concentration is a 50/50 mix of anti-freeze and water. If you are checking this part by yourself, do not remove the radiator cap until the engine has thoroughly cooled. Let the tightness and condition of drive belts, clamps, and hoses be checked by a reliable auto technician.

To achieve further comfort, the heater and defroster should be in good working condition.

Old windshield blades must be replaced. Buying rubber-clad or winter blades so that ice will not build up is a must in a winter season.

The brakes should be regularly checked. Consult the manual if you can replace the original ones with other brands such as EBC brakes.

Inspect the battery through professional equipment. This is the only appropriate way to detect a weak one. Remove the corrosion from posts and cable connections. Clean the entire surface. Make sure all connections are tightened. These should be your routine. Also check the level of fluid monthly if battery caps are removable.

Removal of cables might damage or loose data or codes on some newer vehicles. For further guidance, it is always safe to check your manual. Contact to acids is dangerous. Avoid contact with corrosive deposits and battery acid by wearing an eye protection and rubber gloves.

Before going out with the car, check all lights and bulb. Burned out bulbs must be replaced immediately. All lenses should be free from road grime. For simple lights cleaning, a dry rag can be used.

Examine the exhaust system for leaks through putting your vehicle on a lift. See to it that the exhaust trunk and floorboards do not have small holes. And take note of this: any sweat in the exhaust is deadly. To avoid this, regularly check the system.

Worn tires are also dangerous. Regularly check them to avoid short tread life, uneven wearing, and cupping. The sidewall should also be checked. Tire pressure should be checked once a month, but be sure tires are in cool condition before checking them. The manufacturer’s recommended rotation must be followed. And remember to always bring with you your spare that is in good condition. The jack, which should also be always present in your tools area, should also be in good condition.

And lastly, in case of emergency, you need to have some equipment to back you up. Always bring with you gloves, boots, blankets, flares, a small shovel, sand or kitty litter, tire chains, a flashlight, and a cell phone. This will further ensure your safety especially that you are a neophyte on the road.

Reading some materials on automotive can further add to your knowledge on cars.