Saturday, July 30, 2011

mini cooper

The Mini is a small car that was made by the British Motor Corporation (BMC) and its successors from 1959 until 2000. The original is considered a British icon of the 1960s,[3][4][5] and its space-saving front-wheel-drive layout (which allowed 80% of the area of the car's floorpan to be used for passengers and luggage) influenced a generation of car-makers.[6] The vehicle is in some ways considered the British equivalent to its German contemporary, the Volkswagen Beetle, which enjoyed similar popularity in North America. In 1999 the Mini was voted the second most influential car of the 20th Century, behind the Ford Model T.[7][8]
This distinctive two-door car was designed for BMC by Sir Alec Issigonis.[9][10] It was manufactured at the Longbridge and Cowley plants in England, the Victoria Park / Zetland British Motor Corporation (Australia) factory in Sydney, Australia, and later also in Spain (Authi), Belgium, Chile, Italy (Innocenti), Portugal, South Africa, Uruguay, Venezuela and Yugoslavia. The Mini Mark I had three major UK updates: the Mark II, the Clubman and the Mark III. Within these was a series of variations including an estate car, a pick-up truck, a van and the Mini Moke—a jeep-like buggy. The Mini Cooper and Cooper "S" were sportier versions that were successful as rally cars, winning the Monte Carlo Rally four times from 1964 through to 1967, although in 1966 the Mini was disqualified after the finish, along with six other British entrants, which included the first four cars to finish, under a questionable ruling that the cars had used an illegal combination of headlamps and spotlights.[11] Initially Minis were marketed under the Austin and Morris names, as the Austin Seven and Morris Mini Minor, until Mini became a marque in its own right in 1969.[12][13] The Mini was again marketed under the Austin name in the 1980s

Design and development:
Designed as project ADO15 (Austin Drawing Office project number 15), the Mini came about because of a fuel shortage caused by the 1956 Suez Crisis.[14] Petrol was once again rationed in the UK, sales of large cars slumped, the market for German Bubble cars boomed. Leonard Lord, the somewhat autocratic head of BMC, reportedly detested these cars so much that he vowed to rid the streets of them and design a 'proper miniature car'.[15] He laid down some basic design requirements: the car should be contained within a box that measured 10 × 4 × 4 ft (3 × 1.2 × 1.2 m); and the passenger accommodation should occupy 6 ft (1.8 m) of the 10 ft (3 m) length; and the engine, for reasons of cost, should be an existing unit. Issigonis, who had been working for Alvis, had been recruited back to BMC in 1955 and, with his skills in designing small cars, was a natural for the task. The team that designed the Mini was remarkably small: as well as Issigonis, there was Jack Daniels (who had worked with him on the Morris Minor), Chris Kingham (who had been with him at Alvis), two engineering students and four draughtsmen. Together, by October 1957, they had designed and built the original prototype, which was affectionately named "The Orange Box" because of its colour.[3]
The ADO15 used a conventional BMC A-Series four-cylinder water-cooled engine,[16] but departed from tradition by mounting it transversely, with the engine-oil-lubricated, four-speed transmission in the sump, and by employing front-wheel drive. Almost all small front-wheel-drive cars developed since have used a similar configuration, except with the transmission usually separately enclosed rather than using the engine oil. The radiator was mounted at the left side of the car so that the engine-mounted fan could be retained, but with reversed pitch so that it blew air into the natural low pressure area under the front wing. This location saved precious vehicle length, but had the disadvantage of feeding the radiator with air that had been heated by passing over the engine. It also exposed the entire ignition system to the direct ingress of rainwater through the grille
The suspension system, designed by Issigonis's friend Dr. Alex Moulton at Moulton Developments Limited, used compact rubber cones instead of conventional springs. This ingenious space-saving design also featured rising progressive-rate springing of the cones, and provided some natural damping, in addition to the normal dampers. Built into the subframes, the rubber cone system gave a raw and bumpy ride which was accentuated by the woven-webbing seats, but the rigidity of the rubber cones, together with the wheels being pushed out to the corners of the car, gave the Mini go kart-like handling that would become famous.
Initially an interconnected fluid system was planned—similar to the one that Alec Issigonis and Alex Moulton were working on in the mid-1950s at Alvis. They had assessed the mechanically interconnected Citroën 2CV suspension at that time (according to an interview by Moulton with CAR magazine in the late 1990s), which inspired the design of the Hydrolastic suspension system for the Mini and Morris/Austin 1100, to try to keep the benefits of the 2CV system (ride comfort, body levelling, keeping the roadwheel under good control and the tyre in contact with the road), but with added roll stiffness that the 2CV was very much lacking. The short development time of the car meant this was not ready in time for the Mini's launch. The system intended for the Mini was further developed and the hydrolastic system was first used on the Morris 1100, launched in 1962; the Mini gained the system later in 1964. Ten-inch (254 mm) wheels were specified, so new tyres had to be developed, the initial contract going to Dunlop. Issigonis went to Dunlop stating that he wanted even smaller, 8 in (203 mm) wheels (even though he had already settled on ten-inch). An agreement was made on the ten-inch (254 mm) size, after Dunlop choked on the eight-inch (203 mm) proposition.
Sliding windows allowed storage pockets in the hollow doors; reportedly Issigonis sized them to fit a bottle of Gordon's Gin.[9] The boot lid was hinged at the bottom so that the car could be driven with it open to increase luggage space. On early cars the number plate was hinged at the top so that it could swing down to remain visible when the boot lid was open. This feature was later discontinued after it was discovered that exhaust gases could leak into the cockpit when the boot was open.
The Mini was designed as a monocoque shell with welded seams visible on the outside of the car running down the A and C pillars, and between the body and the floor pan. Those that ran from the base of the A-pillar to the wheel well were described as 'everted' (lit., 'turned outward') to provide more room for the front seat occupants[citation needed]. To further simplify construction, the hinges for the doors and boot lid were mounted externally.
Production models differed from the prototypes by the addition of front and rear subframes to the unibody to take the suspension loads, and by having the engine mounted the other way round, with the carburettor at the back rather than at the front. This layout required an extra gear between engine and transmission to reverse the direction of rotation at the input to the transmission. Having the carburettor behind the engine reduced carburettor icing, but the distributor was then exposed to water coming in through the grille. The engine size was reduced from 948 cc to 848 cc; this, in conjunction with a small increase in the car's width, cut the top speed from 90 mph (145 km/h) to a more reasonable (for the time) 72 mph (116 km/h).
Despite its utilitarian origins, the classic Mini shape had become so well known that by the 1990s, Rover Group—the heirs to BMC—were able to register its design as a trade mark in its own right.
End of production:
Throughout the 1980s and 1990s the British market enjoyed numerous "special editions" of the Mini, which shifted the car from a mass-market item into a fashionable icon. It was this image that perhaps helped the Mini become such an asset for BMW, which later bought the remnants of BMC as the Rover Group. It was even more popular in Japan, where it was seen as a retro-cool icon, and inspired many imitators. The ERA Mini Turbo was particularly popular with Japanese buyers.
In 1994, under Bernd Pischetsrieder, a first cousin once removed of Issigonis, BMW took control of the Rover Group, which included the Mini, fitting an airbag to comply with European legislation.
By March 2000, Rover was still suffering massive losses, and BMW decided to dispose of most of the companies. The sell-off was completed in May that year. MG and Rover went to Phoenix, a new British consortium; and Land Rover was sold to Ford Motor Company. BMW retained the Mini name and the planned new model, granting Rover temporary rights to the brand and allowing it to manufacture and sell the run-out model of the old Mini. By April 2000, the range consisted of four versions: the Mini Classic Seven, the Mini Classic Cooper, the Mini Classic Cooper Sport and—for overseas European markets—the Mini Knightsbridge. The last Mini (a red Cooper Sport) was built on 4 October 2000 and presented to the British Motor Industry Heritage Trust in December of that year.[3] A total of 5,387,862 cars had been manufactured.[25]
After the last of the Mini production had been sold, the 'Mini' name reverted to BMW ownership. The new 'BMW' MINI is technically unrelated to the old car but retains the classic transverse 4-cylinder, front-wheel-drive configuration and iconic "bulldog" stance of the original.
Safety:
Issigonis designed the Mini with an emphasis on active safety. Asked about the crash worthiness of the Mini he said "I make my cars with such good brakes, such good steering, that if people get into a crash it´s their own fault".[69] and "I don’t design my cars to have accidents".[70] It is generally acknowledged that the Mini was designed with excellent handling characteristics.[71]
In July 1965 BMC announced that following "comments by safety experts" about the Mini's external doorhandles, these would be modified on new cars so that the gap between the handle and the door panel would be effectively closed.[72]
Nicholas Faith states in his book that Murray Mackay, one of the UK's leading motor vehicle crash and safety researchers, was critical of the pre-1967 Mini's passive safety features, including the protruding filler cap, the door latch, and the vulnerability of the passenger space to engine intrusion.[69]
The Mini was withdrawn from the American market because it could not meet the 1968 U.S. safety regulations but was sold in Canada until 1979[69][73] and more intense emission standards,[74] and was never updated to comply with those regulations.[73]
Throughout its life, the Mini was modified in various ways to improve its safety. In 1974 a prototype Mini experimental safety vehicle was built (Mini Clubman SRV4) which featured a longer crumple zone, a "pedestrian friendly" front-end, run-flat tyres, strengthened door sills, extra internal padding and recessed door handles.[75] Jack Daniels, one of the original Issigonis team,[76] is stated to have been working on further safety improvements for the Mini when he retired in 1977.[69] Several times it was thought that safety regulations would stop Mini production[77] Safety improved in 1996, with the introduction of airbags and side impact bars.[78] The Mini, challenged by increasingly demanding European safety and pollution standards, was planned by British Aerospace to be taken out of production in 1996, but BMW chose to invest to keep the Mini legal until the launch of the BMW MINI.[79]
In January 2007, the Which? magazine listed the Mini City in its "Ten worst cars for safety (since 1983)" list, alongside other economical, lightweight, fuel efficient cars like the Hyundai Pony 1.2L, Fiat Panda 900 Super, Suzuki Alto GL, Daihatsu Domino, Citroën AX 11 RE, Yugo 45 and 55, Peugeot 205 GL, and the Citroën 2CV6.[80]
A UK Department for Transport statistics publication, presenting estimates of the risk of driver injury in two car injury collisions, based on reported road accident data, estimated that the 1990–2000 Mini was one of two small cars (the other being the Hyundai Atoz), which, with an estimated 84% of drivers likely to be injured, presented the greatest risk of driver injury. The average risk for the small car category was 76%.
New MINI:
When production of the classic Mini ceased in 2000, BMW (the new owner of the brand) announced the successor to the Mini. The brand name for the new car is MINI (written in capital letters),[85] and it is commonly called the "BMW MINI" or the "New MINI".
The new MINI is much larger than the original Mini. It is around 58 centimetres (23 in) longer, 50 centimetres (20 in) wider, 7 centimetres (2.8 in) higher, and weighs around 1,144 kg (2,522 lb) rather than 650 kg (1,433 lb). It is now classified as compact car rather than city car.[86]
On 3 April 2007, the one millionth MINI rolled out of the Oxford Plant after six years of production,[87] just one month longer than it took the classic Mini to reach the same total in March 1965.