A transmission is a machine in a power transmission system, which provides controlled application of the power. The term transmission refers to the gearbox that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device. In British English, the term transmission refers to the whole drivetrain, including clutch, prop shaft and final drive shafts. In American English, the term refers more to the gearbox alone, detailed usage differs; the most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a high rotational speed, inappropriate for starting and slower travel; the transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are used on pedal bicycles, fixed machines, where different rotational speeds and torques are adapted. A transmission has multiple gear ratios with the ability to switch between them as speed varies.
This switching may be done automatically. Directional control may be provided. Single-ratio transmissions exist, which change the speed and torque of motor output. In motor vehicles, the transmission is connected to the engine crankshaft via a flywheel or clutch or fluid coupling because internal combustion engines cannot run below a particular speed; the output of the transmission is transmitted via the driveshaft to one or more differentials, which drives the wheels. While a differential may provide gear reduction, its primary purpose is to permit the wheels at either end of an axle to rotate at different speeds as it changes the direction of rotation. Conventional gear/belt transmissions are not the only mechanism for speed/torque adaptation. Alternative mechanisms include power transformation. Hybrid configurations exist. Automatic transmissions use a valve body to shift gears using fluid pressures in response to speed and throttle input. Early transmissions included the right-angle drives and other gearing in windmills, horse-powered devices, steam engines, in support of pumping and hoisting.
Most modern gearboxes are used to increase torque while reducing the speed of a prime mover output shaft. This means that the output shaft of a gearbox rotates at a slower rate than the input shaft, this reduction in speed produces a mechanical advantage, increasing torque. A gearbox can be set up to do the opposite and provide an increase in shaft speed with a reduction of torque; some of the simplest gearboxes change the physical rotational direction of power transmission. Many typical automobile transmissions include the ability to select one of several gear ratios. In this case, most of the gear ratios are used to slow down the output speed of the engine and increase torque. However, the highest gears may be "overdrive" types. Gearboxes have found use in a wide variety of different—often stationary—applications, such as wind turbines. Transmissions are used in agricultural, construction and automotive equipment. In addition to ordinary transmission equipped with gears, such equipment makes extensive use of the hydrostatic drive and electrical adjustable-speed drives.
The simplest transmissions called gearboxes to reflect their simplicity, provide gear reduction, sometimes in conjunction with a right-angle change in direction of the shaft. These are used on PTO-powered agricultural equipment, since the axial PTO shaft is at odds with the usual need for the driven shaft, either vertical, or horizontally extending from one side of the implement to another. More complex equipment, such as silage choppers and snowblowers, have drives with outputs in more than one direction; the gearbox in a wind turbine converts the slow, high-torque rotation of the turbine into much faster rotation of the electrical generator. These are more complicated than the PTO gearboxes in farm equipment, they weigh several tons and contain three stages to achieve an overall gear ratio from 40:1 to over 100:1, depending on the size of the turbine. The first stage of the gearbox is a planetary gear, for compactness, to distribute the enormous torque of the turbine over more teeth of the low-speed shaft.
Durability of these gearboxes has been a serious problem for a long time. Regardless of where they are used, these simple transmissions all share an important feature: the gear ratio cannot be changed during use, it is fixed at the time. For transmission types that overcome this issue, see Continuously variable transmission known as CVT. Many applications require the availability of multiple gear ratios; this is to ease the starting and stopping of a mechanical system, though another important need is that of maintaining good fuel efficiency. The need for a transmission in an automobile is a consequence of the characteristics of the internal combustion engine. Eng
Alfa Romeo Automobiles S.p. A. is an Italian luxury car manufacturer, founded by Frenchman Alexandre Darracq as A. L. F. A. on 24 June 1910, in Milan. The brand is known for sporty vehicles and has been involved in car racing since 1911; the company was owned by Italian state holding company Istituto per la Ricostruzione Industriale between 1932 and 1986, when it became a part of the Fiat Group. In February 2007, the Alfa Romeo brand became Alfa Romeo Automobiles S.p. A. A subsidiary of Fiat Group Automobiles, now Fiat Chrysler Automobiles Italy; the company that became Alfa Romeo was founded as Società Anonima Italiana Darracq in 1906 by the French automobile firm of Alexandre Darracq, with Italian investors. In late 1909, the Italian Darracq cars were selling and the Italian partners of the company hired Giuseppe Merosi to design new cars. On 24 June 1910, a new company was founded named A. L. F. A. Still in partnership with Darracq; the first non-Darracq car produced by the company was the 1910 24 HP, designed by Merosi.
A. L. F. A. Ventured into motor racing, with drivers Franchini and Ronzoni competing in the 1911 Targa Florio with two 24-hp models. In August 1915, the company came under the direction of Neapolitan entrepreneur Nicola Romeo, who converted the factory to produce military hardware for the Italian and Allied war efforts. In 1920, the name of the company was changed to Alfa Romeo with the Torpedo 20–30 HP the first car to be so badged. In 1921, the Banca Italiana di Sconto. Nicola Romeo & Co, went broke and the government needed to support the industrial companies involved, among, Alfa Romeo, through the "Consorzio per Sovvenzioni sui Valori Industriali". In 1925, the railway activities were separated from the Romeo company, in 1928, Nicola Romeo left. In 1933, the state ownership was reorganized under the banner of the Istituto per la Ricostruzione Industriale by Benito Mussolini's government, which had effective control; the company struggled to return to profitability after the Second World War, turned to mass-producing small vehicles rather than hand-building luxury models.
In 1954, it developed the Alfa Romeo Twin Cam engine, which would remain in production until 1994. During the 1960s and 1970s, Alfa Romeo produced a number of sporty cars, but struggled to make a profit, so Istituto per la Reconstruzione, the state conglomerate that controls Finmeccanica sold the marque to the Fiat Group in 1986. Alfa Romeo has competed in Grand Prix motor racing, Formula One, sportscar racing, touring car racing, rallies, it has competed both as a constructor and an engine supplier, via works entries, private entries. The first racing car was made in 1913, three years after the foundation of the company, Alfa Romeo won the inaugural world championship for Grand Prix cars in 1925; the race victories gave a sporty image to the marque, Enzo Ferrari founded the Scuderia Ferrari racing team in 1929 as an Alfa Romeo racing team, before becoming independent in 1939. It has had the most wins of any marque in the world; the company's name is a combination of the original name, "A. L. F.
A.", the last name of entrepreneur Nicola Romeo, who took control of the company in 1915. The company that became Alfa Romeo was founded as Società Anonima Italiana Darracq in 1906 by the French automobile firm of Alexandre Darracq, with some Italian investors. One of them, Cavaliere Ugo Stella, an aristocrat from Milan, became chairman of the SAID in 1909; the firm's initial location was in Naples, but before the construction of the planned factory had started, Darracq decided late in 1906 that Milan would be more suitable and accordingly a tract of land was acquired in the Milan suburb of Portello, where a new factory of 6,700 square metres was erected. Late 1909, the Italian Darracq cars were selling and Stella, with the other Italian co-investors, founded a new company named A. L. F. A. Still in partnership with Darracq; the first non-Darracq car produced by the company was the 1910 24 HP, designed by Giuseppe Merosi, hired in 1909 for designing new cars more suited to the Italian market. Merosi would go on to design a series of new A.
L. F. A. Cars, with more powerful engines. A. L. F. A. Ventured into motor racing, with drivers Franchini and Ronzoni competing in the 1911 Targa Florio with two 24-hp models. In 1914, an advanced Grand Prix car was designed and built, the GP1914, with a four-cylinder engine, double overhead camshafts, four valves per cylinder, twin ignition. However, the onset of the First World War halted automobile production at A. L. F. A. for three years. In August 1915, the company came under the direction of Neapolitan entrepreneur Nicola Romeo, who converted the factory to produce military hardware for the Italian and Allied war efforts. Munitions, aircraft engines and other components and generators based on the company's existing car engines were produced in a vastly enlarged factory during the war. After the war, Romeo invested his war profits in acquiring locomotive and railway carriage plants in Saronno and Naples, which were added to his A. L. F. A. Ownership. Car production had not been considered at first, but resumed in 1919 since parts for the completion of 105 cars had remained at the A.
L. F. A. Factory since 1915. In 1920, the name of the company was changed to Alfa Romeo with the Torpedo 20–30 HP the first car to be so badged, their first success came in 1920 whe
Alfa Romeo Montreal
The Alfa Romeo Montreal is a 2+2 coupé sports car produced by the Italian manufacturer Alfa Romeo from 1970 to 1977. The Alfa Romeo Montreal was introduced as a concept car in 1967 at Expo 67, held in Montreal, Canada; the concept cars were displayed without any model name, but the public took to calling it The Montreal. It was a 2+2 coupe using the 1.6-litre engine of the Alfa Romeo Giulia TI and the short wheelbase chassis of the Alfa Romeo Giulia Sprint GT, with a body designed by Marcello Gandini at Bertone. One of the two concept cars built for Expo 67 is displayed in the Alfa Romeo Historical Museum in Arese, while the other is in museum storage; the first production car, Tipo 105.64, was shown at the 1970 Geneva Motor Show and was quite different from the original, using a 2593 cc 90° dry-sump lubricated, cross-plane V8 engine with SPICA fuel injection that produced around 200 PS, coupled to a five-speed ZF manual gearbox and a limited-slip differential. This engine was derived from the 2-litre V8 used in the 33 Stradale and in the Tipo 33 sports prototype racer.
The chassis and running gear of the production Montreal were taken from the Giulia GTV coupé and comprised double wishbone suspension with coil springs and dampers at the front and a live axle with limited slip differential at the rear. Since the concept car was unofficially known as The Montreal, Alfa Romeo kept the model name in production. Stylistically, the most eye catching feature is the car's front end with four headlamps covered by unusual "grilles", that retract when the lights are switched on. Another stylistic element is the NACA duct on the bonnet; the duct is blocked off since its purpose is not to draw air into the engine, but to optically hide the power bulge. The slats behind the doors contain the cabin vents, but apart from that only serve cosmetic purposes. Paolo Martin is credited for the prototype instrument cluster; the Montreal was more expensive to buy than the Jaguar E-Type or the Porsche 911. When launched in the UK it was priced at GB£5,077, rising to GB£5,549 in August 1972 and to GB£6,999 by mid-1976.
Production was split between the Alfa Romeo plant in Arese and Carrozzeria Bertone's plants in Caselle and Grugliasco outside Turin. Alfa Romeo produced the chassis and engine and mechanicals and sent the chassis to Caselle where Bertone fitted the body. After body fitment, the car was sent to Grugliasco to be degreased zinc coated, manually spray painted and have the interior fitted; the car was returned to Arese to have the engine and mechanicals installed. It is worth noting that because of this production method, there is not any correspondence between chassis number, engine number and production date; the Montreal remained unchanged until it was discontinued in 1977. By production had long ceased as Alfa were struggling to sell their remaining stock; the total number built was around 3900. None of them were sold in Montreal since Alfa did not develop a North American version to meet the emission control requirements in the United States & Canada. A Montreal can be seen in the 1974 movie The Marseille Contract where Michael Caine drives a metallic dark brown example.
A careful observer can find a red Montreal in the beginning of the James Cameron movie True Lies prior to the lead character saying "Here is my invitation." A Montreal is featured in the 2017 movie Atomic Blonde. Autodelta completed late in 1972 a Group 4 Montreal, it was launched at the London Racing Car Show in January 1973, it was sold to Alfa Romeo Germany to be used in the DRM series for GT cars. Ready to race in May 1973, the car was entrusted to specialist racing team of Dieter Gleich, the principle driver; the Autodelta version had 2997 cc engine with maximum power of 370 hp at 9000 rpm. Without any further development the car was outdated soon. A Montreal was campaigned in the United States but without success. Alfa Romeo 33 Stradale The Alfa Romeo Montreal Website Classic Motorsports magazine Alfa Romeo Montreal buyer's guide
Alfa Romeo Alfasud
The Alfa Romeo Alfasud was a small family car, manufactured from 1971 to 1989 by Industria Napoletana Costruzioni Autoveicoli Alfa Romeo-Alfasud S.p. A of Italy, a new company owned by Alfa Finmeccanica; the company was based in the southern region of Italy as a part of the labour policy of the government. It is considered one of Alfa Romeo's most successful models, with 893,719 examples sold between 1972 and 1983, plus 121,434 Sprint coupé versions between 1976 and 1989. A common nickname for the car is ’Sud; the car went through two facelifts, the first in 1977 and the second one in 1980. Alfa Romeo had explored building a smaller front wheel drive car in the 1950s but it was not until 1967 that firm plans were laid down for an all-new model to fit in below the existing Alfa Romeo range, it was developed by Austrian Rudolf Hruska, who created a unique engineering package, clothed in a body styled by Giorgetto Giugiaro of ItalDesign. The car was built at a new factory at Pomigliano d'Arco in southern Italy, hence the car's name, Alfa Sud.
January 18, 1968, saw the registration at Naples of a new company named "Industria Napoletana Costruzioni Autoveicoli Alfa Romeo-Alfasud S.p. A.". 90% of the share capital was subscribed by Alfa Romeo and 10% by Finmeccanica, at that time the financial arm of the government controlled IRI. Construction work on the company's new state-sponsored plant at nearby Pomigliano d'Arco began in April 1968, on the site of an aircraft engine factory used by Alfa Romeo during the Second World War; the Alfasud was shown at the Turin Motor Show three years in 1971 and was praised by journalists for its styling. The four-door saloon featured a cutting-edge technology, following the technical scheme experimented in Lancia since 1960 on the Lancia Flavia, that is: a front wheel drive with Boxer of 1,186 cc water-cooled engine with a belt-driven overhead camshaft on each cylinder head, it featured an elaborate suspension setup for a car in its class:. Other unusual features for this size of car were four-wheel disc brakes, rack and pinion steering.
The engine design allowed the Alfasud to have a low bonnet line, making it aerodynamic for its day giving it a low centre of gravity. As a result of these design features, the car had excellent performance for its engine size, levels of road-holding and handling that would not be equalled in its class for another ten years. Despite its two-box shape, a hatchback was not part of the range; some of the controls were unorthodox, the lights, turn indicators, horn and heater fan all being operated by pulling, turning or pushing the two column stalks. In November 1973 the first Alfasud sport model joined the range, the two-door Alfasud ti—. Along with a 5-speed gearbox, it featured a more powerful version of the 1.2 litre engine, brought to 68 PS by adopting a Weber twin-choke carburettor, allowing the small saloon to reach 160 km/h. Quad round halogen headlamps, special wheels, a front body-colour spoiler beneath the bumper and rear black one around the tail distinguished the "ti", while inside there was a three-spoke steering wheel, auxiliary gauges, leatherette/cloth seats, carpets in place of rubber mats.
In 1974, Alfa Romeo launched a more upscale model, the Alfasud SE. The SE was replaced by the Alfasud L model introduced at the Bruxelles Motor Show in January 1975. Recognizable by its bumper overriders and chrome strips on the door sills and on the tail, the Lusso was better appointed than the standard Alfasud, with such features as cloth upholstery, padded dashboard with glove compartment and optional tachometer. A three-door estate model called the Alfasud Giardinetta was introduced in May 1975, with the same equipment of the Alfasud "L"; the Lusso model was produced until 1976, was replaced by the new Alfasud 5m model, the first four-door Alfasud with a five-speed gearbox. Presented at the March 1976 Geneva Motor Show, it was equipped like the Lusso. In September 1976, the Alfasud Sprint coupé was launched. Built on the same platform of the saloon, it featured lower, more angular bodywork, again by Giorgetto Giugiaro, featured a hatchback; the Sprint was powered by a new, more powerful Boxer, stroked from the 1.2 to displace 1,286 cc and develop 76 PS, was paired the five-speed gearbox.
The same 1286 cc engine was fitted into the 2-door saloon, creating the Alfasud ti 1.3, put on sale alongside the "ti" 1.2 in July 1977. In late 1977 the Alfasud Super replaced the range-topping four-door "5m", it was available with both the 1.2- and 1.3-litre engines from the "ti", though both were equipped with a single-choke carburettor. The Super introduced improvements both outside, with new bumpers including large plastic strips, inside, with a revised dashboard, new door cards and two-tone cloth seats. Similar upgrades were applied to the Giardinetta. In May 1978 the Sprint and "ti" got new engines, a 79 PS 1.3 and a 85 PS 1.5, both with a twin-choke carburettor. At the same time the Alfasud ti received cosmetic updates: bumpers from the Super, new rear spoiler on the boot lid, black wheel arch extensions and black front spoiler, was upgraded to the revised interior of the Super; the 1.3 and 1.5 engines were soon made available alongside the 1.2 on the Giardinetta and Super, with a lower output compared to the sport models, due to having a single-choke carburettor.
In 1979 the Sprint was given a double twin-choke carbur
ALFA 40/60 HP
The ALFA 40/60 HP is a road car and race car made by Italian car manufacturer ALFA. This model was made between 1913 and 1922 and was designed by Giuseppe Merosi, as were all other Alfas at that time; the 40/60 HP has a 6082 cc straight-4 engine with overhead valves, which produced 70 bhp and its top speed was 125 km/h. The race model 40-60 HP Corsa had 73 bhp and a top speed of 137 km/h, it won its own category in the Parma-Berceto race. In 1914 the milanese count Marco Ricotti commissioned to Carrozzeria Castagna the ALFA 40/60 HP Aerodinamica, a prototype model which could reach 139 km/h top speed. A replica of that car was created in the 1970s, now it is shown in the Alfa Romeo Historical Museum.40/60 HP production and development was interrupted by the First World War, but resumed afterwards. 40-60 HP Corsa had now a top speed of around 150 km/h. Giuseppe Campari won the 1921 races at Mugello with this car; the 40-60 HP was based on a ladder chassis of C-shaped stamped steel rails. Its engine was a 6,082 cc or 371 cu in overhead valve inline-four cylinder, fed by a single vertical carburettor.
The en bloc cylinder block and cylinder head were split in two groups of two cylinders, made of cast iron. The two in-block camshafts were driven by a gear train located at the front of the engine; the driveline comprised a dry multi-plate clutch, a four-speed gearbox and a one-piece propeller shaft, spinning inside a tube attached to the rear differential housing. At its open end, towards the gearbox, this tube forked out into two ends which, linked to the chassis, located the rear axle; the gearbox was positioned towards the middle of the chassis underneath the driver, rather than in block with the engine—to which it was connected by a short prop shaft. Front and rear solid axles were sprung on longitudinal semi-elliptic leaf springs. Brakes were drums on the rear wheels, with both hand controls; the wheels were 5.5 x19". The tipo corsa sat on a shortened wheelbase of 2,950 mm, instead of the road car's 3,200 mm. Kerb weight was 1,100 kg versus 1,250 kg; the racing-prepared engine had a 5.50:1 compression ratio.
It produced 73 bhp at 2,000 rpm. Top speed was 150 km/h; the final drive ratio was 18/49 instead of the standard 17/49. The Sankey steel wheels were replaced by 6.0x20" knock-off wire wheels. Fuel tank capacity was expanded from the standard 70 l to 120 l. ALFA 40-60 HP Castagna Siluro Aerodinamica 1914 on autoconcept-reviews.com
Alfa Romeo RL
The Alfa Romeo RL was produced between 1922-1927. It was Alfa's first sport model after World War I; the car was designed in 1921 by Giuseppe Merosi. It had a straight-6 engine with overhead valves. Three different versions were made: Normale and Sport. RL total production was 2640; the RLTF was the race version of RL - it weighed half of normal versions, the engine had seven main bearings instead of four and double carburetors. In 1923 Alfa's race team had drivers like Ugo Sivocci, Antonio Ascari, Giulio Masetti and Enzo Ferrari. Sivocci's car had green cloverleaf symbol on white background and when he won Targa Florio 1923, that symbol was to become the Alfa team's good luck token. In 1927, 2 different RLSS were entered in the first Mille Miglia, but both dropped out after leading the race. A 1925 RLSS version with rare, original bodywork by Thornton Engineering Company in Bradford, UK, is on permanent display in the Brooklands exhibit at the Simeone Foundation Automotive Museum in Philadelphia, PA, USA.
It is one of only 9 RLSS still in existence
Automotive design is the process of developing the appearance, to some extent the ergonomics, of motor vehicles, including automobiles, trucks, buses and vans. The functional design and development of a modern motor vehicle is done by a large team from many different disciplines included within automotive engineering, design roles are not associated with requirements for Professional or Chartered-Engineer qualifications. Automotive design in this context is concerned with developing the visual appearance or aesthetics of the vehicle, though it is involved in the creation of the product concept. Automotive design as a professional vocation is practiced by designers who may have an art background and a degree in industrial design or transportation design. Terminology used in the field is found in the glossary of automotive design; the task of the design team is split into three main aspects: exterior design, interior design, color and trim design. Graphic design is an aspect of automotive design.
Design focuses not only on the isolated outer shape of automobile parts, but concentrates on the combination of form and function, starting from the vehicle package. The aesthetic value will need to correspond to ergonomic utility features as well. In particular, vehicular electronic components and parts will give more challenges to automotive designers who are required to update on the latest information and knowledge associated with emerging vehicular gadgetry dashtop mobile devices, like GPS navigation, satellite radio, HD radio, mobile TV, MP3 players, video playback, smartphone interfaces. Though not all the new vehicular gadgets are to be designated as factory standard items, some of them may be integral to determining the future course of any specific vehicular models; the designer responsible for the exterior of the vehicle develops the proportions and surfaces of the vehicle. Exterior design is first done by a series of manual drawings. Progressively, drawings that are more detailed are executed and approved by appropriate layers of management.
Industrial plasticine and or digital models are developed from, along with the drawings. The data from these models are used to create a full-sized mock-up of the final design. With three- and five-axis CNC milling machines, the clay model is first designed in a computer program and "carved" using the machine and large amounts of clay. In times of high-class 3d software and virtual models on power walls, the clay model is still the most important tool to evaluate the design of a car and, therefore, is used throughout the industry; the designer responsible for the vehicles' interior develops the proportions, shape and surfaces for the instrument panel, door trim panels, pillar trims, etc. Here the emphasis is on the comfort of the passengers; the procedure here is the same as with exterior design. The color and trim designer is responsible for the research and development of all interior and exterior colors and materials used on a vehicle; these include paints, fabric designs, grains, headliner, wood trim, so on.
Color, contrast and pattern must be combined to give the vehicle a unique interior environment experience. Designers work with the exterior and interior designers. Designers draw inspiration from other design disciplines such as: industrial design, home furnishing and sometimes product design. Specific research is done into global trends to design for projects two to three model years in the future. Trend boards are created from this research in order to keep track of design influences as they relate to the automotive industry; the designer uses this information to develop themes and concepts that are further refined and tested on the vehicle models. The design team develops graphics for items such as: badges, dials, kick or tread strips, liveries; the sketches and rendering are transformed into 3D Digital surface modelling and rendering for real-time evaluation with Math data in initial stages. During the development process succeeding phases will require the 3D model developed to meet the aesthetic requirements of a designer and well as all engineering and manufacturing requirements.
The developed CAS digital model will be re-developed for manufacturing meeting the Class-A surface standards that involves both technical as well as aesthetics. This data will be further developed by Product Engineering team; these modelers have a background in Industrial design or sometimes tooling engineering in case of some Class-A modelers. Autodesk Alias and ICEM Surf are the two most used software tools for Class-A development. Several manufacturers have varied development cycles for designing an Automobile, but in practice these are the following. Design and User Research Concept Development sketching CAS Clay modeling Interior Buck Model Vehicle ergonomics Class-A Surface Development Colour and Trim Vehicle GraphicsThe design process occurs concurrently with other product Engineers who will be engineering the styling data for meeting performance and safety regulations. From mid-phase and forth interactions between the designers and product engineers culminates into a finished product be manufacturing ready.
Apart from this the Engineering team parallelly works in the following areas. Product Engineering, NVH Development team, Prototype