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Monday, 28 April 2014

Power steering

In automobiles, a power steering (also known as power assisted steering (PAS) or steering assist system) helps drivers steer by augmenting steering effort of the steering wheel. Hydraulic or electric actuators add controlled energy to the steering mechanism, so the driver needs to provide only modest effort regardless of conditions. Power steering helps considerably when a vehicle is stopped or moving slowly. Also, power steering provides some feedback of forces acting on the front wheels to give an ongoing sense of how the wheels are interacting with the road; this is typically called "rοad feel".
Representative power steering systems for cars augment steering effort via an actuator, a hydraulic cylinder, which is part of a servo system. These systems have a direct mechanical connection between the steering wheel and the linkage that steers the wheels. This means that power-steering system failure (to augment effort) still permits the vehicle to be steered using manual effort alone.
Other power steering systems (such as those in the largest off-road construction vehicles) have no direct mechanical connection to the steering linkage; they require power. Systems of this kind, with no mechanical connection, are sometimes called "drive by wire" or "steer by wire", by analogy with aviation's "fly-by-wire". In this context, "wire" refers to electrical cables that carry power and data, not thin-wire-rope mechanical control cables.
In other power steering systems, electric motors provide the assistance instead of hydraulic systems. As with hydraulic types, power to the actuator (motor, in this case) is controlled by the rest of the power-steering system.
Some construction vehicles have a two-part frame with a rugged hinge in the middle; this hinge 

Sunday, 27 April 2014

Bayerische Motoren Werke - BMW or BMW AG, CAR.

Bayerische Motoren Werke AG  English: Bavarian Motor Works), commonly known as BMW or BMW AG, is a German automobile, motorcycle and engine manufacturing company founded in 1916.
BMW is headquartered in Munich, Bavaria, Germany. It also owns and produces Mini cars, and is the parent company of Rolls-Royce Motor Cars. BMW produces motorcycles under BMW Motorrad. In 2012, the BMW Group produced 1,845,186 automobiles and 117,109 motorcycles across all of its brands. BMW is part of the "German Big 3" luxury automakers, along with Audi and Mercedes-Benz, which are the three best-selling luxury automakers in the world.
BMW was established as a business entity following a restructuring of the Rapp Motorenwerke aircraft manufacturing firm in 1917. After the end of World War Iin 1918, BMW was forced to cease aircraft-engine production by the terms of the Versailles Armistice Treaty.The company consequently shifted to motorcycle production in 1923, once the restrictions of the treaty started to be lifted,followed by automobiles in 1928–29.
The first car which BMW successfully produced and the car which launched BMW on the road to automobile production was the Dixi, it was based on the Austin 7 and licensed from the Austin Motor Company in Birmingham, England.
BMW's first significant aircraft engine was the BMW IIIa inline-six liquid-cooled engine of 1918, much preferred for its high-altitude performance. With German rearmament in the 1930s, the company again began producing aircraft engines for the Luftwaffe. Among its successful World War II engine designs were the BMW 132 and BMW 801 air-cooled radial engines, and the pioneering BMW 003 axial-flow turbojet, which powered the tiny, 1944–1945–era jet-powered "emergency fighter", the Heinkel He 162 Spatz. The BMW 003 jet engine was tested in the A-1b version of the world's first jet fighter, the Messerschmitt Me 262, but BMW engines failed on takeoff, a major setback for the Emergency Fighter Program until successful testing with Junkers engines. Towards the end of the Third Reich BMW developed some military aircraft projects for the Luftwaffe, the BMW Strahlbomber, the BMW Schnellbomber and the BMW Strahljäger, but none of them were built.
By the year 1959, the automotive division of BMW was in financial difficulties and a shareholders meeting was held to decide whether to go into liquidation or find a way of carrying on. It was decided to carry on and to try to cash in on the current economy car boom enjoyed so successfully by some of Germany's ex-aircraft manufacturers such as Messerschmitt and Heinkel. The rights to manufacture the Italian Iso Isetta were bought; the tiny cars themselves were to be powered by a modified form of BMW's own motorcycle engine. This was moderately successful and helped the company get back on its feet. The controlling majority shareholder of the BMW Aktiengesellschaft since 1959 is the Quandt family, which owns about 46% of the stock. The rest is in public float.
BMW acquired the Hans Glas company based in Dingolfing, Germany, in 1966. Glas vehicles were briefly badged as BMW until the company was fully absorbed. It was reputed that the acquisition was mainly to gain access to Glas' development of the timing belt with an overhead camshaft in automotive applications, although some saw Glas' Dingolfing plant as another incentive. However, this factory was outmoded and BMW's biggest immediate gain was, according to themselves, a stock of highly qualified engineers and other personnel. The Glas factories continued to build a limited number of their existing models, while adding the manufacture of BMW front and rear axles until they could be closer incorporated into BMW.

In 1992, BMW acquired a large stake in California based industrial design studio Design works USA, which they fully acquired in 1995. In 1994, BMW bought the British Rover Group (which at the time consisted of the Rover, Land Rover and MG brands as well as the rights to defunct brands including Austin and Morris), and owned it for six years. By 2000, Rover was incurring huge losses and BMW decided to sell the combine. The MG and Rover brands were sold to the Phoenix Consortium to form MG Rover, while Land Rover was taken over by Ford. BMW, meanwhile, retained the rights to build the new Mini, which was launched in 2001
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Friday, 25 April 2014

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Toyota Motor Corporation


Toyota Motor Corporation (Japanese:  is a Japanese automotive manufacturer headquartered in Toyota, Aichi, Japan. In 2013 the multinational corporation consisted of 333,498 employees worldwide and, as of January 2014, is the fourteenth-largest company in the world by revenue. Toyota was the largest automobile manufacturer in 2012 (by production). In July of that year, the company reported the production of its 200-millionth vehicle. Toyota is the world's first automobile manufacturer to produce more than 10 million vehicles per year. It did so in 2012 according to OICA, and in 2013 according to company data. As of November 2013, Toyota was the largest listed company in Japan by market capitalization (worth more than twice as much as #2-ranked Soft Bank) and by revenue.
The company was founded by Kiichiro Toyoda in 1937 as a spinoff from his father's company Toyota Industries to create automobiles. Three years earlier, in 1934, while still a department of Toyota Industries, it created its first product, the Type A engine, and, in 1936, its first passenger car, the Toyota AA. Toyota Motor Corporation produces vehicles under 5 brands, including the Toyota brand, Hino, Lexus, Ranz, and Scion. It also holds a 51.2% stake in Daihatsu, a 16.66% stake in Fuji Heavy Industries, a 5.9% stake in Isuzu, and a 0.27% stake in Tesla, as well as joint-ventures with two in China (GAC Toyota andSichuan FAW Toyota Motor), one in India (Toyota Kirloskar), one in the Czech Republic (TPCA), along with several "nonautomotive" companies. TMC is part of the Toyota Group, one of the largest conglomerates in the world.