|
Opposed-piston
An opposed-piston engine is a piston engine in which each cylinder has a piston at both ends, and no cylinder head. Petrol and diesel opposed-piston engines have been used mostly in large-scale applications such as ships, military tanks, and factories. Current manufacturers of opposed-piston engines include Fairbanks-Morse, Cummins and Achates Power. Design Compared to contemporary two-stroke engines, which used a conventional design of one piston per cylinder, the advantages of the opposed-piston engine have been recognized as: * Eliminating the cylinder head and valvetrain, which reduces weight, complexity, cost, heat loss, and friction loss of the engine. * Creating a uniflow-scavenged movement of gas through the combustion chamber, which avoided the drawbacks associated with the contemporary crossflow-scavenged designs (however later advancements have provided methods for achieving uniflow scavenging in conventional piston engine designs). * A reduced height of the en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achates Power
Achates Power is an American developer of opposed-piston engine, opposed-piston, two-stroke engine, two-stroke, compression ignition engines for use in commercial and passenger vehicles. Based in San Diego, California, the company was founded in 2004 by James U Lemke. According to Achates Power, its opposed-piston, two-stroke engine has demonstrated an increase in fuel efficiency and similar engine-out emissions levels. In 2014, the company published a technical paper citing a 30 percent fuel economy improvement when its engine was benchmarked against a next-generation diesel fuel, diesel engine equipped with advanced technologies. In December 2012, the company announced that it had been selected as a subcontractor to AVL Powertrain Engineering, Inc. to build the next-generation combat engine for the U.S. Army. Less than a year later, in October 2013, Achates Power and Fairbanks-Morse, Fairbanks Morse Engine signed a joint development and licensing agreement to reduce emissions an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Napier Deltic
The Napier Deltic engine is a British opposed-piston valveless, supercharged uniflow scavenged, two-stroke diesel engine used in marine and locomotive applications, designed and produced by D. Napier & Son. Unusually, the cylinders were disposed in a three-bank triangle, with a crankshaft at each corner of the triangle. The term Deltic (meaning "in the form of the Greek letter (capital) delta") is used to refer to both the Deltic E.130 opposed-piston, high-speed diesel engine and the locomotives produced by English Electric using these engines, including its demonstrator locomotive named ''DELTIC'' and the production version for British Railways, which designated these as (TOPS) Class 55. A single, half-sized, turbocharged Deltic power unit also featured in the English Electric-built Type 2 locomotive, designated as the Class 23. Both locomotive and engine became better known as the "Baby Deltic". History and design The Deltic story began in 1943 when the British Admiral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leyland L60
The Leyland L60 was a British vertical six-cylinder opposed-piston two-stroke multi-fuel diesel engine designed by Leyland Motors in the late 1950s/early 1960s for the Chieftain main battle tank (MBT). The engine was also used in the Vickers MBT and its Indian-built derivative, the Vijayanta. Development The initial engine choice in 1954 for what was known at the time as "Medium Gun Tank No.2", later designated the "FV4201" and given the service name 'Chieftain', was a Rolls-Royce diesel V8, however during the Chieftain's design phase NATO introduced a policy in 1957 requiring all armoured fighting vehicles to have a multi-fuel capability. This left the Rolls-Royce engine an unsuitable option and so a new engine with this capability was required. Leyland Motors, under the direction of the Fighting Vehicles Research and Development Establishment (FVRDE) at Chertsey, was asked to develop an opposed-piston two-stroke diesel of similar design to those previously produced by N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairbanks Morse 38 8-1/8 Diesel Engine
The Fairbanks-Morse 38 8-1/8 is a diesel engine of the two-stroke, opposed-piston type. It was developed in the 1930s, and is similar in arrangement to a contemporary series of German Bombers aircraft diesels. The engine was used extensively in US diesel electric submarines of the 1940s and 1950s, as backup power on most US nuclear submarines, as well as in other marine applications, stationary power generation, and briefly, locomotives. A slightly modified version, the 38ND 8-1/8, continues in service on ''Los Angeles''-, ''Seawolf''-, and ''Ohio''-class nuclear submarines of the US Navy. The 38 8-1/8 has been in continuous production since its development in 1938, and is currently manufactured by a descendant of Fairbanks-Morse, FMDefense, in Beloit, Wisconsin. Specifications The 38 8-1/8 engines are inline diesel engines, with combustion occurring between two opposed pistons within a single cylinder liner. The engine has a bore of 8-1/8 inches (206.4 mm), a stroke of 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gobron-Brillié
Gobron-Brillié was an early French automobile manufactured from 1898 to 1930.P. Roberts (1973). ''A Picture History of the Automobile'', Ward Lock Ltd, London, UK. The original company, ''Societé des Moteurs Gobron-Brillié'', was founded by the French engineer, Eugène Brillié, and industrialist, Gustave Gobron, at 13, quai de Boulogne, Boulogne-sur-Seine, near Paris, in 1898. History Before 1898 Eugène Brillié studied at the École centrale des arts et manufactures, and then went on to work, from 1887 to 1898, at the Compagnie des chemins de fer de l'Ouest. Meanwhile, Gustave Gobron (15 June 1846 to 27 September 1911) started as director of ''Godillot'', a supply company to the military, but took up politics, and was elected to the National Assembly, from 1885 to 1889, at which point he created a car manufacturing company, under his own name. The two men went into partnership, creating the ''Société des Moteurs Gobron-Brillié''. 1898–1903 Brillié had developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commer TS3
The Commer TS3 was a diesel engine fitted in Commer trucks built by the Rootes Group in the 1950s and 1960s. It was the first diesel engine used by the company. Development Rootes' intention for the engine was for it to fit under the QX "cab forward" design fitted to the R7 7ton truck released in 1948. This very advanced design had been built with the engine under the seat to allow three men to fit comfortably across the cab. The petrol version used a development of the Humber Super Snipe engine, lying at a 66 degree angle, and the opposed piston design of the TS3 was used so that it would fit in the same space. It is often thought that "TS" in the engine's name derives from its Tilling-Stevens origins, a company acquired by Rootes in 1950 but this is incorrect. It stands for Two-stroke. Development of the engine started at the Humber plant at Stoke Aldermoor some four years before Rootes had acquired Tilling-Stevens. The small design team headed by Chief Engineer Eric Coy, began w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chieftain Tank
The FV4201 Chieftain was the main battle tank of the United Kingdom during the 1960s–1990s. A development of the Centurion, the Chieftain introduced the supine (reclining) driver position to British design allowing a heavily sloped hull with reduced height. A new powerpack and improved transmission gave it higher speed than the Centurion despite being heavier due to major upgrades to armour protection and the armament; this allowed it to replace both the Conqueror and Centurion while performing their roles effectively. It remained in service until replaced by the Challenger 1 which shared many of the Chieftain's features. Development The Chieftain was an evolutionary development of the successful cruiser line of tanks that had emerged at the end of the Second World War. Its predecessor, the Centurion main battle tank (MBT), is widely considered to be one of the most successful of post-war MBT designs. However, the introduction of the Soviet IS-3 /IS-4 heavy tank along with S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairbanks-Morse
Fairbanks, Morse and Company was an American manufacturing company in the late 19th and early 20th century. Originally a weighing scale manufacturer, it later diversified into pumps, engines, windmills, coffee grinders, radios, farm tractors, feed mills, locomotives, and industrial supplies until it was purchased by Penn Texas in 1958. There are three separate corporate entities that could be considered successors to the company, none of which is a complete and direct descendant of the original company. All claim the heritage of Fairbanks Morse and Company: * Fairbanks Scales is a privately owned company in Kansas City, Missouri, that manufactures scales * Fairbanks Morse Defense, a subsidiary company of Arcline Investment Management, is a company based in Beloit, Wisconsin, that manufactures and services engines * Fairbanks Nijhuis is a part of Pentair Water in Kansas City, Kansas, and manufactures pumps Founding and early history Fairbanks Morse and Company began in 1823 whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrol-Johnston
Arrol-Johnston (later known as Arrol-Aster) was an early Scottish manufacturer of automobiles, which operated from 1895 to 1931 and produced the first automobile manufactured in Britain. The company also developed the world's first "off-road" vehicle for the Egyptian government, and another designed to travel on ice and snow for Ernest Shackleton's Nimrod Expedition to the South Pole. History George Johnston was by training a locomotive engineer from Neilson, Reid and Company Limited of Springburn, Glasgow. Johnston was commissioned by Glasgow Corporation Tramways in 1894 to build an experimental steam-powered tramcar to replace their fleet of horse-drawn trams. During a final test before a Corporation committee, it caught fire and work was abandoned. Johnston's attention was then turned to a detailed examination of continental makes of motor cars and he came to the conclusion that he could design and make a better vehicle than any of them and, in particular, a better engine. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atkinson Cycle
The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density. A variation of this approach is used in some modern automobile engines. While originally seen exclusively in hybrid electric applications such as the earlier-generation Toyota Prius, later hybrids and some non-hybrid vehicles now feature engines with variable valve timing, which can run in the Atkinson cycle as a part-time operating regimen, giving good economy while running in Atkinson cycle, and conventional power density when running as a conventional, Otto cycle engine. Design Atkinson produced three different designs that had a short compression stroke and a longer expansion stroke. The first Atkinson-cycle engine, the ''differential engine'', used opposed pistons. The second and best-known design was the ''cycle engine'', which used an over-center arm to create four piston strokes in one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junkers Jumo 205
The Jumo 205 aircraft engine was the most famous of a series of aircraft diesel engines produced by Junkers. The Jumo 204 first entered service in 1932. Later engines of this type comprised the experimental Jumo 206 and Jumo 208, with the Jumo 207 produced in some quantity for the Junkers Ju 86P and -R high-altitude reconnaissance aircraft, and the 46-meter wingspan, six-engined Blohm & Voss BV 222 ''Wiking'' flying boat. All three of these variants differed in stroke and bore and supercharging arrangements. In all, more than 900 of these engines were produced, in the 1930s and through most of World War II. Design and development These engines all used a two-stroke cycle with 12 pistons sharing six cylinders, piston crown to piston crown in an opposed configuration. This unusual configuration required two crankshafts, one at the bottom of the cylinder block and the other at the top, geared together. The pistons moved towards each other during the operating cycle. The intake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Doxford & Sons
William Doxford & Sons Ltd, often referred to simply as Doxford, was a British shipbuilding and marine engineering company. History William Doxford founded the company in 1840. From 1870 it was based in Pallion, Sunderland, on the River Wear in Northeast England. The Company was managed by William Doxford's four sons following his death in 1882. It was acquired by Northumberland Shipbuilding Company in 1918. It was renamed ''Doxford & Sunderland Shipbuilding & Engineering Co Ltd'' in 1961 and ''Doxford & Sunderland Ltd'' in 1966. Court Line took it over in 1972 and renamed it ''Sunderland Shipbuilders Ltd''. In the 1970s a new all-weather Pallion yard was built which could build two ships of up to 30,000 tons deadweight side-by-side. The steel came in at one end, and the completed ship left from the other with engines installed and sometimes with the machinery running. Court Line collapsed in 1974 and the company was nationalised. It was privatised in 1986 when it was me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Leyland L60")
.jpg "Click for more on -> William Doxford & Sons")