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A diesel engine (sometimes capitalized as Diesel engine) is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression. This is in contrast to a petrol engine (known as a gasoline engine in North America) or gas engine (using a gaseous fuel, not gasoline), which uses the Otto cycle, in which an air-fuel mixture is ignited by a spark plug. The diesel cycle was invented by German engineer Rudolf Diesel and it has the highest thermal efficiency of any regular internal or external combustion engine due to its very high compression ratio. Low-speed diesel engines (as used in ships and other applications where overall engine weight is relatively unimportant) often have a thermal efficiency which exceeds 50 percent. Diesel engines are manufactured in two stroke and four stroke versions. They were originally used as a more efficient replacement for stationary steam engines. Since the 1910s they have been used in submarines and ships. Use in locomotives, large trucks and electric generating plants followed later. In the 1930s, they slowly began to be used in a few automobiles. Since the 1970s, the use of diesel engines in larger on-road and off-road vehicles in the USA increased. As of 2007, about 50 percent of all new car sales in Europe are diesel. The world's largest diesel engine is currently a Wärtsilä marine diesel of about 80 MW output. From Wikipedia under the
GNU Free Documentation License  pollentransport.com Danny McCall Wed, 24 Feb 2010 22:27:54 GM TrackBack. TrackBack URL for this entry: Listed below are links to weblogs that reference Introducing the flying odd couple: . diesel engines. and helicopters. ...  zercustoms.com ZerCustoms ue, 02 Mar 2010 00:09:26 GM Thanks to the turbocharged petrol and . diesel engines. , every version of the 2011 Volkswagen Sharan has gained significant extra agility. Completely new styling reinforces this. Its concise front and rear contours, in particular, ...  greenenvironmentnews.com unknown Mon, 22 Feb 2010 06:00:00 GM According to a complaint filed simultaneously with the settlement in federal court in the District of Columbia, between 1998 and 2006, Cummins shipped in excess of 57000 heavy duty . diesel engines. to vehicle equipment manufacturers ... From Google Blog Search: "diesel engines"  mlive.com Sat, 07 Aug 2010 00:42:33 GMT+00:00 MLive.com joseph county two trailers one loaded with two Harley Davidson motorcycles, the other with two diesel engines were stolen within two days of each ...  abcnews.in Tue, 03 Aug 2010 06:21:20 GMT+00:00 for the U.S. Market ABCNews.in (blog) ... of the Cayenne in Canada as well as the US Also it was notice by the company that Canadians are more likely interested in diesel engines in SUVs. ...  mgn.com Fri, 06 Aug 2010 19:05:41 GMT+00:00 Maritime Global Net (press release) FAME can be used neat as a fuel but is more commonly blended with petroleum diesel for use in diesel engines . The different chemical compositions of FAME ... From Google News Search: "diesel engines" Do diesel engines have a longer life than petrol ones regardless of engine capacity? Q. I know diesel engines have a longer life than petrol ones, but not sure where engine capacity comes into this. Asked by unknown - Wed Jun 9 09:17:49 2010 - - 7 Answers - 0 Comments A. No, this is largely a myth. Large diesel engines last longer because they are designed too. If there were similar large gas engines they could be built to last the same way, but there generally aren't any large gasoline engines like that because they are not efficient. Diesel engines in cars last about the same as the equivalent-sized gasoline versions...sometimes not as long. It depends a great deal on the engine design, and not whether it is a diesel or not. Diesel engines run under much higher stresses and shock than gasoline engines, and produce dirtier combustion. If all other things were equal, they would not last as long. The reason they do is that they have substantially heavier construction, thicker parts, and larger bearings.… [cont.] Answered by unknown - Wed Jun 9 09:29:12 2010 Are the newer gasoline engines as reliable and long-living as diesel engines? Q. are gasoline engines that much improved? I am talking diesel engines in cars and light trucks and vans. A car salesman tried to tell me this today. maybe he was right---what do YOU think? Asked by dryBri aka Eatonwrite RETURNS! - Tue Jul 27 23:29:54 2010 - - 5 Answers - 0 Comments A. Diesels on average are always going to last longer. Your average diesel will run to 400,000 miles or more without breaking a sweat, whereas an average gas engine would last 1/2 as long. Again, these are averages, and there are examples of both over 1 million miles without a rebuild. However, the reason for the average to be much higher on the diesel is because they turn lower RPMs than a gas engine. Where you normally cruise at about 3000rpm on the highway at 70mph with a gas engine, your average diesel is turning 1800rpm, because it redlines at 4000, unlike the 7000 for the gas engine. RPM's and heat kill engines quicker than the fuel itself...and the diesels run cooler and turn less RPMs. Answered by unknown - Tue Jul 27 23:50:19 2010 Why diesel engines are used in commercial vehicles rather than gasoline engines?
Q. Why diesel engines are used in commercial vehicles rather than gasoline engines? Also why torque of IC engine decrease as speed increase? Asked by aspP - Sat Apr 10 22:07:55 2010 - - 5 Answers - 0 Comments A. diesel engines, with higher compression, are more efficient than gasoline engines. Answered by linlyons - Sat Apr 10 22:37:04 2010 From Yahoo Answer Search: "diesel engines" |
