Variomatic

Variomatic is the stepless, fully automatic transmission of the Dutch car manufacturer DAF, using a drive belt and two pulleys. It was the first continuously variable transmission (CVT) (as opposed to shifting between separate gears). In theory, this always produces the optimum torque. The variomatic was introduced by DAF in 1958, also putting an automatic gear box in the Netherlands for the first time. The variomatic was introduced on the DAF 600. Because the system does not have separate gears, but one (continuously shifting) gear and a separate 'reverse mode' (as opposed to a reverse gear), the gear works in reverse as well, giving it the interesting side-effect that one can drive backwards as fast as forwards. As a result, in the former Dutch annual backward driving world championship, the DAFs had to be put in a separate competition because no other car could keep up. Thus, these very cheap and simple cars were the 'formula one' in this competition. The continuously variable transmission (CVT) is a transmission in which the ratio of the rotational speeds of two shafts, as the input shaft and output shaft of a vehicle or other machine, can be varied continuously within a given range, providing an infinite number of possible ratios. ... Audi developed a new stepless transmission named Multitronic. ... This article does not cite any references or sources. ... Shimano XT rear derailleur on a mountain bike Derailleur gears are a variable ratio transmission system commonly used on bicycles, consisting of a chain, multiple sprockets and a mechanism to move the chain from one sprocket to another. ... Hub gears or internal-gear hubs are a type of gear system used on bicycles. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... The automatic gear selector in a Ford Five Hundred vehicle An automatic transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, thus freeing the driver from having to shift gears manually (similar but larger devices are also used for railroad locomotives). ... DAF Trucks NV is a Dutch truck manufacturing company and a division of PACCAR. Its headquarters and main plant are in Eindhoven. ... For the band, see Pulley (band). ... The continuously variable transmission (CVT) is a transmission in which the ratio of the rotational speeds of two shafts, as the input shaft and output shaft of a vehicle or other machine, can be varied continuously within a given range, providing an infinite number of possible ratios. ... Torque applied via an adjustable end wrench Relationship between force, torque, and momentum vectors in a rotating system In physics, torque (or often called a moment) can informally be thought of as rotational force or angular force which causes a change in rotational motion. ... The DAF 600 is a small family car that was DAFs first production passenger car, and manufactured from 1959 until 1963. ...

Manual transmission remained dominant in Europe. When DAF was taken over by Volvo, the Variomatic patents were transferred to a company called VDT (Van Doorne Transmissie), later taken over by Bosch. Audi reintroduced an improved version of the variomatic in the early 21st century under the name Multitronic. This system uses a metal belt and lacks a limit to the number of gears available, switching between them without noticeable shocks. These metal drive belts are the most important part of CVT. The only factory still producing these belts, the Bosch factory in the Netherlands, produced the ten millionth belt on 9 May 2007. It is used in over 40 car models, these days even including expensive brands like Mercedes. A manual transmission (also known as a stick shift, straight drive, or standard transmission) is a type of transmission used in automotive applications. ... Audi AG is a German automobile manufacturer with headquarters in Ingolstadt, Bavaria, and has been an almost wholly owned (99. ... Audi developed a new stepless transmission named Multitronic. ... Bosch is the colloquial short name for the German company Robert Bosch GmbH, as well as the last name of: Hieronymus Bosch (1450-1516) - Dutch painter Robert Bosch (1861-1942) - German industrialist Carl Bosch (1874-1940) - German chemist and engineer Juan Bosch (1909-2001) - Dominican politician and writer Orlando Bosch... is the 129th day of the year (130th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... Mercedes may refer to: Things Mercedes-Benz, a German brand of automobiles and trucks Mercedes-Benz (song), by Janis Joplin Mercedes (calculator), an early 20th-century computing device Mercedes College, South Australia Places Mercedes, Buenos Aires, Argentina Mercedes, Paraná, Brazil Mercedes, Camarines Norte, Philippines Mercedes, Eastern Samar, Philippines Mercedes, Texas...

The final drive has two pulleys with moveable conical drums. The distance between the drums is controlled by the engine vacuum in the inlet manifold and engine RPM, through centrifugal weights inside the drums. Between the two pulleys runs a drive belt. As a result of change in the distance of the conical drums in both pulleys, the diameters and so also the reduction ratio changes continuously. Image File history File links Variolaag. ... Image File history File links Variohoog. ... For the band, see Pulley (band). ... On a sphere, the sum of the angles of a triangle is not equal to 180° (see spherical trigonometry). ... rpm or RPM may mean: revolutions per minute RPM Package Manager (originally called Red Hat Package Manager) RPM (movie) RPM (band), a Brazilian rock band RPM (magazine), a former Canadian music industry magazine In firearms, Rounds Per Minute: how many shots an automatic weapon can fire in one minute On... Gears on a piece of farm equipment, gear ratio 1:1. ...

With the DAF 600 - 55 each rear wheel was propelled individually by a pair of conical drums and drive belt with the effect of a limited slip differential: if a drive wheel on slippery road revs up, the other wheel can still transfer the full torque. This results in unusually good traction characteristics, which were also a reason for successes of the DAFs in rallies. It was even used in a Formula 1 car, but it was only allowed to start in one race before it was banned since it gave an unfair advantage. There were several disadvantages that accompanied the lack of a true differential gear. Although each belt could settle (independent of the other) into it's optimum position, thus allowing for wheel speed variation, the system was slow to operate and depended on the pulleys being turned. This led to rapid tire wear and placed stress on other transmission components. Snapped drive shafts were common. Low speed handling in icy conditions was interesting as the system tended to drive the car forward against the influence of the steered wheels. Later cars, the 46, 66 and Volvo variants were fitted with a differentially geared axle. In an automobile and other four-wheeled vehicles, a differential is a device, usually consisting of gears, for allowing each of the driving wheels to rotate at different speeds, while supplying equal torque to each of them. ... Rallying (international) or rally racing (US) is a form of automobile racing that takes place on normal roads with modified production or specially built road cars. ... Formula One, abbreviated to F1 and also known as Grand Prix racing, is the highest class of single-seat open-wheel auto racing. ...

The Variomatic is also used in today's motorscooters. It is a standard part of all common scooters since 1985, and several companies such as Malossi, Polini, Doppler and Stage6 are offering tuning clutches and variomatic for most common 50, 70 and 125 cc scooters. A typical mid 1980s twist and go scooter. ... Malossi S.p. ... Polini S.p. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Stage6 is a video sharing website first launched by DivX in 2006 and currently in beta. ...

A version of the Variomatic called Transmatic is still made by DAF's Van Doorne's Transmissie b.v. in Tilburg, The Netherlands and Nissan Primera is offered with this transmission. Tilburg ( (help· info)) is a municipality and a city in the Netherlands, located in the southern province of Noord-Brabant. ... The Nissan Primera is a large family saloon produced by the Japanese automaker Nissan for the domestic and European markets. ...

Today the Continuously Variable Transmission (CVT) works according to the same principle. Rather than rubber drive belts, the modern transmission is made much more durable by the use of steel link belts. The CVT is available in cars such as Audi, Honda and the MINI ONE and MINI Cooper. The continuously variable transmission (CVT) is a transmission in which the ratio of the rotational speeds of two shafts, as the input shaft and output shaft of a vehicle or other machine, can be varied continuously within a given range, providing an infinite number of possible ratios. ... Audi AG is a German automobile manufacturer with headquarters in Ingolstadt, Bavaria, and has been an almost wholly owned (99. ... The logo of the Honda automobiles The logo of the Honda motorcycles Honda Motor Company, Limited )   (TYO: 7267 , NYSE: HMC), or simply called Honda, is a Japanese multinational corporation, engine manufacturer and engineering corporation. ... The BMW or New MINI is a car produced by BMW since 2001. ... The BMW or New MINI is a car produced by BMW since 2001. ...