1.
Auto racing
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Auto racing is a sport involving the racing of automobiles for competition. Almost as soon as automobiles had been invented, races of various sorts were organised, by the 1930s specialist racing cars had developed. There are now numerous different categories, each with different rules and it was won by the carriage of Isaac Watt Boulton. Internal combustion auto racing events began soon after the construction of the first successful gasoline-fueled automobiles, the first organized contest was on April 28,1887, by the chief editor of Paris publication Le Vélocipède, Monsieur Fossier. It ran 2 kilometres from Neuilly Bridge to the Bois de Boulogne, on July 22,1894, the Parisian magazine Le Petit Journal organized what is considered to be the worlds first motoring competition, from Paris to Rouen. One hundred and two competitors paid a 10-franc entrance fee, the first American automobile race is generally held to be the Thanksgiving Day Chicago Times-Herald race of November 28,1895. Press coverage of the event first aroused significant American interest in the automobile, brooklands, in Surrey, was the first purpose-built motor racing venue, opening in June 1907. It featured a 4.43 km concrete track with high-speed banked corners, One of the oldest existing purpose-built automobile racing circuits in the United States, still in use, is the 2. 5-mile -long Indianapolis Motor Speedway in Speedway, Indiana. It is the largest capacity venue of any variety worldwide, with a top capacity of some 257. NASCAR was founded by Bill France, Sr. on February 21,1948, the first NASCAR Strictly Stock race ever was held on June 19,1949, at Daytona Beach, Florida. From 1962, sports cars temporarily took a seat to GT cars. From 1972 through 2003, NASCARs premier series was called the Winston Cup Series, the changes that resulted from RJRs involvement, as well as the reduction of the schedule from 48 to 31 races a year, established 1972 as the beginning of NASCARs modern era. The IMSA GT Series evolved into the American Le Mans Series, the European races eventually became the closely related Le Mans Series, both of which mix prototypes and GTs. The best-known variety of racing, Formula One, which hosts the famous Monaco Grand Prix. In single-seater, the wheels are not covered, and the cars often have aerofoil wings front, in Europe and Asia, open-wheeled racing is commonly referred to as Formula, with appropriate hierarchical suffixes. In North America, the Formula terminology is not followed, the sport is usually arranged to follow an international format, a regional format, and/or a domestic, or country-specific, format. In North America, the used in the National Championship have traditionally been similar though less sophisticated than F1 cars. The series most famous race is the Indianapolis 500, the other major international single-seater racing series is GP2
2.
Formula One
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Formula One is the highest class of single-seat auto racing that is sanctioned by the Fédération Internationale de lAutomobile. The FIA Formula One World Championship has been the form of racing since the inaugural season in 1950. The formula, designated in the name, refers to a set of rules, the F1 season consists of a series of races, known as Grands Prix, held worldwide on purpose-built F1 circuits and public roads. The results of each race are evaluated using a system to determine two annual World Championships, one for drivers, one for constructors. The racing drivers are required to be holders of valid Super Licences, the races are required to be held on tracks graded 1, the highest grade a track can receive by the FIA. Most events are held in locations on purpose-built tracks, but there are several events in city centres throughout the world. Formula One cars are the fastest road racing cars in the world. Formula One cars race at speeds of up to approximately 375 km/h with engines currently limited in performance to a maximum of 15,000 RPM, the cars are capable of lateral acceleration in excess of five g in corners. The performance of the cars is very dependent on electronics – although traction control and other driving aids have been banned since 2008 – and on aerodynamics, suspension, the formula has radically evolved and changed through the history of the sport. F1 had a global television audience of 425 million people during the course of the 2014 season. Grand Prix racing began in 1906 and became the most popular internationally in the second half of the twentieth century. The Formula One Group is the holder of the commercial rights. Its high profile and popularity have created a major merchandising environment, since 2000 the sports spiraling expenditures and the distribution of prize money favoring established top teams have forced complaints from smaller teams and led several teams to bankruptcy. On 23 January 2017 it was confirmed that Liberty Media had completed its $8 billion acquisition of Delta Topco, the Formula One series originated with the European Grand Prix Motor Racing of the 1920s and 1930s. The formula is a set of rules that all cars must meet. Formula One was a new formula agreed upon after World War II during 1946, the first world championship race was held at Silverstone, United Kingdom in 1950. A championship for constructors followed in 1958, national championships existed in South Africa and the UK in the 1960s and 1970s. Non-championship Formula One events were held for years, but due to the increasing cost of competition
3.
British Racing Motors
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British Racing Motors was a British Formula One motor racing team. Founded in 1945 and based in the town of Bourne in Lincolnshire, it participated from 1950 to 1977, competing in 197 grands prix. BRM won the title in 1962 when its driver Graham Hill became world champion. In 1963,1964,1965 and 1971, BRM came second in the constructors competition. BRM was founded just after the Second World War by Raymond Mays, who had built several hillclimb and road racing cars under the ERA brand before the war, and Peter Berthon, Owen, whose group primarily manufactured car parts, took over the team in its entirety. Between 1954 and 1970 the team entered its works F1 cars under the name of the Owen Racing Organisation. Berthon and Mays continued to run the team on Rubery Owens behalf into the 1960s, before it was handed over to Louis Stanley, the husband of Sir Alfreds sister Jean Owen. A factory was set up in Spalding Road, Bourne, Lincolnshire, behind Eastgate House, Mays family home, several people involved with ERA returned to the firm to work for BRM, including Harry Mundy and Eric Richter. The team also had access to a test facility at Folkingham aerodrome, the first post-war rules for the top level of motor racing allowed 1. 5-litre supercharged or 4. 5-litre normally aspirated engines. BRMs first engine design was an extremely ambitious 1. 5-litre supercharged V16, Rolls-Royce was contracted to produce centrifugal superchargers, rather than the more commonly used Roots type. The design concept of the V16 had not been used extensively on automobiles before so that problems were many. This made the car very touchy to drive, engineer Tony Rudd was seconded to BRM from Rolls-Royce to develop the supercharging system and remained involved with BRM for nearly twenty years. The Type 15, which was the designation for the V16 car, won the first two races it actually started, the Formula Libre and Formula One events at Goodwood in September 1950, however, it was never to be so successful again. The engine proved unreliable and difficult to develop, and the team were not up to the task of improving the situation, the Type 25 was BRMs next car. The P25 was initially unsuccessful, not winning a race until a victory at the Dutch Grand Prix in 1959, colin Chapman helped to improve the car in 1956. However, the change was the promotion of an exceptional engineer who had been with the team since 1950. Rudd was the first professional engineer to exercise full control over the team. Raymond Mays and Peter Berthon were sidelined, the team had designed their first mid-engined car for 1960, matching the other teams, and won the World Drivers Championship with Graham Hill as driver, in 1962 with the P57
4.
Automotive design
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Automotive design is the profession involved in the development of the appearance, and to some extent the ergonomics, of motor vehicles or more specifically road vehicles. This most commonly refers to automobiles but also refers to motorcycles, trucks, buses, coaches, the functional design and development of a modern motor vehicle is typically done by a large team from many different disciplines included within automotive engineering. Automotive design in context is primarily concerned with developing the visual appearance or aesthetics of the vehicle. Automotive design is practiced by designers who usually have an art background, the task of the design team is usually split into three main aspects, exterior design, interior design, and color and trim design. Graphic design is also an aspect of design, this is generally shared amongst the design team as the lead designer sees fit. Design focuses not only on the outer shape of automobile parts. The aesthetic value will need to correspond to ergonomic functionality and utility features as well, 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 stylist responsible for the design of the exterior of the vehicle develops the proportions, shape, Exterior design is first done by a series of digital or manual drawings. Progressively, drawings that are more detailed are executed and approved by appropriate layers of management, Clay and or digital models are developed from, and 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 model is first designed in a computer program and then carved using the machine. Even in times of high-class 3d software and virtual models on power walls, here the emphasis is on ergonomics and 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, design, and development of all interior and exterior colors and materials used on a vehicle. These include paints, plastics, fabric designs, leather, grains, carpet, headliner, wood trim, Color, contrast, texture, and pattern must be carefully combined to give the vehicle a unique interior environment experience. Designers work closely with the exterior and interior designers, designers draw inspiration from other design disciplines such as, industrial design, fashion, home furnishing, architecture, and sometimes product design. Specific research is done into global trends to design for two to three model years in the future. Trend boards are created from research in order to keep track of design influences as they relate to the automotive industry. The designer then uses this information to develop themes and concepts that are further refined and tested on the vehicle models
5.
Steel
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Steel is an alloy of iron and other elements, primarily carbon, that is widely used in construction and other applications because of its high tensile strength and low cost. Steels base metal is iron, which is able to take on two forms, body centered cubic and face centered cubic, depending on its temperature. It is the interaction of those allotropes with the elements, primarily carbon. In the body-centred cubic arrangement, there is an atom in the centre of each cube. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement of dislocations that otherwise occur in the lattices of iron atoms. The carbon in steel alloys may contribute up to 2. 1% of its weight. Steels strength compared to pure iron is possible at the expense of irons ductility. With the invention of the Bessemer process in the mid-19th century and this was followed by Siemens-Martin process and then Gilchrist-Thomas process that refined the quality of steel. With their introductions, mild steel replaced wrought iron, further refinements in the process, such as basic oxygen steelmaking, largely replaced earlier methods by further lowering the cost of production and increasing the quality of the product. Today, steel is one of the most common materials in the world and it is a major component in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Modern steel is generally identified by various grades defined by assorted standards organizations, the noun steel originates from the Proto-Germanic adjective stakhlijan, which is related to stakhla. The carbon content of steel is between 0. 002% and 2. 1% by weight for plain iron–carbon alloys and these values vary depending on alloying elements such as manganese, chromium, nickel, iron, tungsten, carbon and so on. Basically, steel is an alloy that does not undergo eutectic reaction. In contrast, cast iron does undergo eutectic reaction, too little carbon content leaves iron quite soft, ductile, and weak. Carbon contents higher than those of steel make an alloy, commonly called pig iron, while iron alloyed with carbon is called carbon steel, alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include, manganese, nickel, chromium, molybdenum, boron, titanium, vanadium, tungsten, cobalt, and niobium. Additional elements are important in steel, phosphorus, sulfur, silicon, and traces of oxygen, nitrogen, and copper. Alloys with a higher than 2. 1% carbon content, depending on other element content, cast iron is not malleable even when hot, but it can be formed by casting as it has a lower melting point than steel and good castability properties
6.
Body-on-frame
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Body-on-frame is an automobile construction method by which a separate body is mounted on a relatively rigid frame or chassis that carries the engine and drivetrain. It was the method of building automobiles and continues to this day. In the late 19th century frames might be made of wood reinforced by steel flitch plates, mass production of all-metal bodies became general in the 1920s but Europe, with exceptions, followed almost a decade later. Europes custom-made or coachbuilt cars usually contained some wood framing or used aluminium alloy castings, today some new vehicles still have a separate chassis, most commonly pickup trucks and their relatively low volume variants like crossover SUVs. The Ford Model T carried the tradition of body-on-frame over from horse-drawn buggies and it was also easy to use the same chassis and driveline for several very different cars. Especially in the days before computer-aided design, this was a big advantage, most small passenger vehicles switched to unibody construction by the end of the 1930s. The trend had started with cars like the Citroen Traction Avant, trucks, bus manufacturers and large low volume cars or those made in USA continued to use separate bodies on conventional frames. Mass-market manufacturers Ford, General Motors and Chrysler are abandoning true body-on-frame SUVs, opting, when sales volume permits, for more efficient unibody construction. Toyota currently manufactures the most body-on-frame SUVs with the 4Runner, FJ Cruiser, Land Cruiser, Sequoia, Lexus GX and LX followed by Nissan with the Armada, Patrol, Xterra and Infiniti QX56/80. The Ford Panther platform, which was discontinued in 2011, was the last series of passenger cars to be built in this manner. One variant used by Chevrolet for its Corvette incorporates the inner skeleton to the frame, an intermediate to full monocoque construction was the semi-monocoque used by the Volkswagen Beetle and Renault 4. These used a separate chassis made from pressed sheet steel panels forming a platform chassis, to give the benefits of a traditional chassis. Both of these chassis were used for different models. The mid-1930s designed Volkswagen made use of the bodyshell for structural strength as well as the chassis — hence semi-monocoque, traditionally chassis had compliance, they were designed to allow some twisting. As suspensions improved they could not perform correctly unless supporting a rigid structure like that intended to be provided by unibody or monocoque construction. The Lincoln Town Car once dominated the American limousine market because it was the last American luxury car made on the body-on-frame system, with the Town Car discontinued since 2011, the de facto replacement is the Lincoln Navigator SUV. Easier to design, build and modify, quieter, because the stresses do not pass into the body, which is isolated from the frame with rubber pads around the attachment bolts. This is less significant now, but historically bodies would squeak and rattle more as they rusted, lubricants drained, isolated bodies were affected to a lesser degree by these modes of aging
7.
Ferdinand Porsche
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Ferdinand Porsche was an automotive engineer and founder of the Porsche car company. He is best known for creating the first gasoline-electric hybrid vehicle, the Volkswagen Beetle, in addition, Porsche designed the 1923 Benz Tropfenwagen, which was the first racing car with a mid-engine, rear-wheel drive layout. Porsche was an important contributor to the German war effort during World War II. He was involved in the production of advanced tanks such as the VK4501, Tiger I, Tiger II, Elefant, Porsche was a member of the German Nazi party and allegedly the SS. He was a recipient of the German National Prize for Art and Science, the SS-Ehrenring and he was called the Great German Engineer by Nazi propaganda. In 1996 Porsche was inducted into the International Motorsports Hall of Fame, Ferdinand Porsche was born to German-speaking parents in Maffersdorf, northern Bohemia, part of the Austrian Empire at that time, and today part of the Czech Republic. Ferdinand was his parents third child and his father, Anton Porsche, was a master panel-beater. He showed an aptitude for mechanical work at a very early age. He attended classes at the Imperial Technical School in Reichenberg at night while helping his father in his shop by day. Thanks to a referral, Porsche landed a job with the Béla Egger Electrical company in Vienna when he turned 18, in Vienna he would sneak into the local university whenever he could after work. Other than attending classes there, Porsche never received any higher engineering education, during his five years with Béla Egger, Porsche first developed the electric hub motor. After the breakup of the Austro-Hungarian Empire at the end of World War I, in 1934 Adolf Hitler or Joseph Goebbels made Porsche a naturalized German citizen. In 1898, Porsche joined the Vienna-based factory Jakob Lohner & Company, which produced coaches for Emperor Franz Joseph I of Austria as well as for the monarchs of the UK, Sweden, and Romania. Jakob Lohner had begun construction of automobiles in 1896 under Ludwig Lohner in the suburb of Floridsdorf. Their first design was the Egger-Lohner vehicle, first unveiled in Vienna, Austria, on 26 June 1898, Porsche had engraved the code P1 onto all the key components. The Egger-Lohner was a car driven by two electric motors within the front wheel hubs, powered by batteries. This drive train construction was expanded to four-wheel drive, by mounting two more electric motors to the rear wheels, and a four-motor example was ordered by Englishman E. W. Hart in 1900. In December that year, the car was displayed at the Paris World Exhibition under the name Toujours-Contente, even though this one-off vehicle had been commissioned for the purposes of racing and record-breaking, its 1,800 kg of lead–acid batteries was a severe shortcoming
8.
Lockheed Corporation
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The Lockheed Corporation was an American aerospace company. Lockheed was founded in 1912 and later merged with Martin Marietta to form Lockheed Martin in 1995, the Alco Hydro-Aeroplane Company was established in San Francisco in 1912 by the brothers Allan and Malcolm Loughead. Following the Model F-1, the company invested heavily in the design, however, the asking price of $2500 could not compete in a market that was saturated with post World War 1 $350 Curtiss JN-4s and De Haviland trainers. The Loughead Aircraft Manufacturing Company closed its doors in 1921, in 1926, Allan Loughead, Jack Northrop, and Kenneth Jay secured funding to form the Lockheed Aircraft Company in Hollywood. This new company utilized some of the technology originally developed for the Model S-1 to design the Vega Model. In March 1928, the relocated to Burbank, California. From 1926-28 the company produced over 80 aircraft and employed more than 300 workers who by April 1929 were building five aircraft per week, in July 1929, majority shareholder Fred Keeler sold 87% of the Lockheed Aircraft Company to Detroit Aircraft Corporation. In August 1929, Allan Lockheed resigned, the Great Depression ruined the aircraft market, and Detroit Aircraft went bankrupt. A group of headed by brothers Robert and Courtland Gross. The syndicate bought the company for a mere $40,000, ironically, Allan Lockheed himself had planned to bid for his own company, but had raised only $50,000, which he felt was too small a sum for a serious bid. In 1934, Robert E. Gross was named chairman of the new company, the Lockheed Aircraft Corporation and his brother Courtlandt S. Gross was a co-founder and executive, succeeding Robert as Chairman following his death in 1961. The company was named the Lockheed Corporation in 1977, in the 1930s, Lockheed spent $139,400 to develop the Model 10 Electra, a small twin-engined transport. The company sold 40 in the first year of production, amelia Earhart and her navigator, Fred Noonan, flew it in their failed attempt to circumnavigate the world in 1937. Subsequent designs, the Lockheed Model 12 Electra Junior and the Lockheed Model 14 Super Electra expanded their market. The Lockheed Model 14 formed the basis for the Hudson bomber and its primary role was submarine hunting. The Model 14 Super Electra were sold abroad, and more than 100 were license-built in Japan for use by the Imperial Japanese Army, the P-38 was the only American fighter aircraft in production throughout American involvement in the war, from Pearl Harbor to Victory over Japan Day. It filled ground-attack, air-to-air, and even strategic bombing roles in all theaters of the war in which the United States operated, the Lockheed Vega factory was located next to Burbanks Union Airport which it had purchased in 1940. During the war, the area was camouflaged to fool enemy aerial reconnaissance
9.
Internal combustion engine
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An internal combustion engine is a heat engine where the combustion of a fuel occurs with an oxidizer in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine the expansion of the high-temperature and high-pressure gases produced by combustion applies direct force to some component of the engine, the force is applied typically to pistons, turbine blades, rotor or a nozzle. This force moves the component over a distance, transforming chemical energy into mechanical energy. The first commercially successful internal combustion engine was created by Étienne Lenoir around 1859, firearms are also a form of internal combustion engine. Working fluids can be air, hot water, pressurized water or even liquid sodium, ICEs are usually powered by energy-dense fuels such as gasoline or diesel, liquids derived from fossil fuels. While there are many applications, most ICEs are used in mobile applications and are the dominant power supply for vehicles such as cars, aircraft. Typically an ICE is fed with fossil fuels like natural gas or petroleum products such as gasoline, there is a growing usage of renewable fuels like biodiesel for compression ignition engines and bioethanol or methanol for spark ignition engines. Hydrogen is sometimes used, and can be made from fossil fuels or renewable energy. Various scientists and engineers contributed to the development of internal combustion engines, in 1791, John Barber developed a turbine. In 1794 Thomas Mead patented a gas engine, also in 1794 Robert Street patented an internal combustion engine, which was also the first to use liquid fuel, and built an engine around that time. In 1798, John Stevens built the first American internal combustion engine, in 1807, Swiss engineer François Isaac de Rivaz built an internal combustion engine ignited by electric spark. In 1823, Samuel Brown patented the first internal combustion engine to be applied industrially, in 1860, Belgian Jean Joseph Etienne Lenoir produced a gas-fired internal combustion engine. In 1864, Nikolaus Otto patented the first atmospheric gas engine, in 1872, American George Brayton invented the first commercial liquid-fuelled internal combustion engine. In 1876, Nikolaus Otto, working with Gottlieb Daimler and Wilhelm Maybach, patented the compressed charge, in 1879, Karl Benz patented a reliable two-stroke gas engine. In 1892, Rudolf Diesel developed the first compressed charge, compression ignition engine, in 1926, Robert Goddard launched the first liquid-fueled rocket. In 1939, the Heinkel He 178 became the worlds first jet aircraft, at one time, the word engine meant any piece of machinery — a sense that persists in expressions such as siege engine. A motor is any machine that produces mechanical power, traditionally, electric motors are not referred to as Engines, however, combustion engines are often referred to as motors. In boating an internal combustion engine that is installed in the hull is referred to as an engine, reciprocating piston engines are by far the most common power source for land and water vehicles, including automobiles, motorcycles, ships and to a lesser extent, locomotives
10.
Inline-four engine
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The inline-four engine or straight-four engine is a type of inline internal combustion four-cylinder engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or a plane with all the pistons driving a common crankshaft. Where it is inclined, it is called a slant-four. In a specification chart or when an abbreviation is used, an engine is listed either as I4 or L4. The inline-four layout is in primary balance and confers a degree of mechanical simplicity which makes it popular for economy cars. However, despite its simplicity, it suffers from an imbalance which causes minor vibrations in smaller engines. These vibrations become more powerful as engine size and power increase, the inline-four is the most common engine configuration in modern cars, while the V6 engine is the second most popular. This inline engine configuration is the most common in cars with a displacement up to 3.0 L, in practice, the displacement of inline-four petrol engines in cars rarely exceeds this figure. For example, the largest engine of this form on the U. S. market in model year 2015 is the Toyota 2TR-FE, however, there are some notable exceptions. Early vehicles also tended to have engines with larger displacements to develop horsepower, the Model A Ford was built with a 3.3 L inline-four engine. Inline-four diesel engines, which are lower revving than gasoline engines, Mitsubishi still employs a 3.0 L inline-four diesel. Generally, European and Asian manufacturers of trucks with a vehicle weight rating between 7.5 and 18 tonnes use inline four-cylinder diesel engines with displacements around 5 L. The MAN D0834 engine is a 4.6 L inline-4 with 220 hp and 627 lb·ft, the Isuzu Forward is a medium-duty truck which is available with a 5.2 L inline-four engine that delivers 210 hp and 470 lb·ft. The Hino Ranger is a medium-duty truck which is available with a 5.1 L inline-four engine that delivers 175 hp and 465 lb·ft, the earlier Hino Ranger even had a 5.3 L inline-four engine. The Kubota M135X is a tractor with a 6.1 L inline-four and this turbo-diesel engine has a bore of 118 mm and a relatively long stroke of 140 mm. One of the strongest Powerboat-4-cylinders is the Volvo Penta D4-300 turbodiesel and this is a 3.7 L-inline-4 with 300 hp and 516 lb·ft. Brunswick Marine built a 127 kW3.7 L 4-cylinder gasoline engine for their Mercruiser Inboard/outboard line, the block was formed from one half of a Ford 460 cubic inch V8 engine. This engine was produced in the 1970s and 1980s, One of the largest inline-four engines is the MAN B&W 4K90 marine engine
11.
Differential (mechanical device)
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In automobiles and other wheeled vehicles, the differential allows the outer drive wheel to rotate faster than the inner drive wheel during a turn. This is necessary when the vehicle turns, making the wheel that is traveling around the outside of the turning curve roll farther and faster than the other, the average of the rotational speed of the two driving wheels equals the input rotational speed of the drive shaft. An increase in the speed of one wheel is balanced by a decrease in the speed of the other, when used in this way, a differential couples the input shaft to the pinion, which in turn runs on the ring gear of the differential. This also works as reduction gearing, on rear wheel drive vehicles the differential may connect to half-shafts inside an axle housing, or drive shafts that connect to the rear driving wheels. Front wheel drive tend to have the pinion on the end of the main-shaft of the gearbox. There are individual drive-shafts to each wheel, non-automotive uses of differentials include performing analog arithmetic. The ball was painted black and white in hemispheres, and graphically showed the phase of the moon at a point in time. See also the Chinese South-pointing chariot, an equation clock that used a differential for addition was made in 1720. In the 20th Century, large assemblies of many differentials were used as analog computers, calculating, for example, however, the development of electronic digital computers has made these uses of differentials obsolete. Practically all the differentials that are now made are used in automobiles, there are many claims to the invention of the differential gear, but it is possible that it was known, at least in some places, in ancient times. Some historical milestones of the include,100 BC–70 BC. Some such chariots may have used differential gears,658,666 AD, two Chinese Buddhist monks and engineers create south-pointing chariots for Emperor Tenji of Japan. 1720, Joseph Williamson uses a gear in a clock. 1810, Rudolph Ackermann of Germany invents a four-wheel steering system for carriages,1827, modern automotive differential patented by watchmaker Onésiphore Pecqueur of the Conservatoire National des Arts et Métiers in France for use on a steam wagon. 1832, Richard Roberts of England patents gear of compensation, a differential for road locomotives,1874, Aveling and Porter of Rochester, Kent list a crane locomotive in their catalogue fitted with their patent differential gear on the rear axle. 1876, James Starley of Coventry invents chain-drive differential for use on bicycles,1897, first use of differential on an Australian steam car by David Shearer. 1958, Vernon Gleasman patents the Torsen dual-drive differential, a type of differential that relies solely on the action of gearing, instead of a combination of clutches. An epicyclic differential can use epicyclic gearing to split and apportion torque asymmetrically between the front and rear axles, an epicyclic differential is at the heart of the Toyota Prius automotive drive train, where it interconnects the engine, motor-generators, and the drive wheels
12.
Gasoline
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Gasoline /ˈɡæsəliːn/, known as petrol /ˈpɛtrəl/ outside North America, is a transparent, petroleum-derived liquid that is used primarily as a fuel in internal combustion engines. It consists mostly of organic compounds obtained by the distillation of petroleum. On average, a 42-gallon barrel of oil yields about 19 US gallons of gasoline when processed in an oil refinery. The characteristic of a gasoline blend to resist igniting too early is measured by its octane rating. Gasoline is produced in several grades of octane rating, sometimes, gasoline also contains ethanol as an alternative fuel, for economic or environmental reasons. Gasoline, as used worldwide in the vast number of combustion engines used in transport and industry, has a significant impact on the environment. Gasoline may also enter the environment uncombusted, as liquid and as vapors, from leakage and handling during production, transport and delivery, from tanks, from spills. As an example of efforts to control leakage, many storage tanks are required to have extensive measures in place to detect. Gasoline contains benzene and other known carcinogens, Gasoline inhalation can produce an intense high, however the practice is thought to cause severe organ damage, including mental retardation. The first automotive combustion engines, so-called Otto engines, were developed in the last quarter of the 19th century in Germany, the fuel was a relatively volatile hydrocarbon obtained from coal gas. With a boiling point near 85 °C, it was suited for early carburetors. The development of a spray nozzle carburetor enabled the use of less volatile fuels, further improvements in engine efficiency were attempted at higher compression ratios, but early attempts were blocked by knocking. In the 1920s, antiknock compounds were introduced by Thomas Midgley Jr. and Boyd and this innovation started a cycle of improvements in fuel efficiency that coincided with the large-scale development of oil refining to provide more products in the boiling range of gasoline. In the 1950s oil refineries started to focus on high octane fuels, the 1970s witnessed greater attention to the environmental consequences of burning gasoline. These considerations led to the out of TEL and its replacement by other antiknock compounds. Subsequently, low-sulfur gasoline was introduced, in part to preserve the catalysts in modern exhaust systems, Gasoline is the term that is used in North America to refer to the most popular automobile fuel. The Oxford English Dictionary dates the first use to 1863, when it was spelled gasolene and it was never a trademark, although it may have been derived from older trademarks such as Cazeline and Gazeline. Variant spellings of gasoline had been used to refer to raw petroleum since the 16th century, Petrol is the preferred term in most Commonwealth countries
