1.
Bentley
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Bentley Motors Limited is a British manufacturer and marketer of luxury cars and SUVs—and a subsidiary of Volkswagen AG since 1998. The joining and eventual separation of Bentley and Rolls-Royce follows a series of mergers and acquisitions, beginning with the 1931 purchase by Rolls-Royce of Bentley, Rolls-Royce Motors was subsequently sold to engineering conglomerate, Vickers and in 1998, Vickers sold Rolls-Royce to Volkswagen AG. The aerospace company, Rolls-Royce Plc, ultimately sold both to BMW AG, at the DFP factory, in 1913, he noticed an aluminum paperweight and thought that aluminum might be a suitable replacement for cast iron to fabricate lighter pistons. The first Bentley aluminum pistons were fitted to Sopwith Camel aero engines during World War I, in August 1919, W. O. registered Bentley Motors Ltd. and in October he exhibited a car chassis, with dummy engine, at the London Motor Show. Ex–Royal Flying Corps officer Clive Gallop designed an innovative 4 valves per cylinder engine for the chassis, by December the engine was built and running. Delivery of the first cars was scheduled for June 1920, the durability of the first Bentley cars earned widespread acclaim and they competed in hill climbs and raced at Brooklands. Bentleys first major event was the 1922 Indianapolis 500, a race dominated by specialized cars with Duesenberg racing chassis and they entered a modified road car driven by works driver, Douglas Hawkes, accompanied by riding mechanic, H. S. Bertie Browning. Hawkes completed the full 500 miles and finished 13th with an speed of 74.95 mph after starting in 19th position. The team was rushed back to England to compete in the 1922 RAC Tourist Trophy. In ironic reference to his heavyweight boxers stature, Captain Woolf Barnato was nicknamed Babe, in 1925, he acquired his first Bentley, a 3-litre. With this car he won numerous Brooklands races, just a year later he acquired the Bentley business itself. The Bentley enterprise was always underfunded, but inspired by the 1924 Le Mans win by John Duff and Frank Clement, Barnato had incorporated Baromans Ltd in 1922, which existed as his finance and investment vehicle. Via Baromans, Barnato initially invested in excess of £100,000, saving the business, a financial reorganisation of the original Bentley company was carried out and all existing creditors paid off for £75,000. Existing shares were devalued from £1 each to just 1 shilling, Barnato held 149,500 of the new shares giving him control of the company and he became chairman. Barnato injected further cash into the business, £35,000 secured by debenture in July 1927, £40,000 in 1928, with renewed financial input, W. O. Bentley was able to design another generation of cars. The Bentley Boys were a group of British motoring enthusiasts that included Woolf Barnato, Sir Henry Tim Birkin, steeple chaser George Duller, aviator Glen Kidston, sammy Davis, and Dr Dudley Benjafield. The Bentley Boys, favored Bentley cars, many were independently wealthy and often had a military background. They kept the reputation for high performance alive, Bentley was noted for its four consecutive victories at the 24 Hours of Le Mans from 1927 to 1930
2.
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
3.
W. O. Bentley
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Walter Owen Bentley, MBE was an English engineer who designed engines for cars and aircraft, raced cars and motorcycles, and founded Bentley Motors Limited in Cricklewood near London. He was known as W. O. without any need to add the word Bentley, Bentley, born in Hampstead, London, was the youngest of his Adelaide-born parents’ nine children. His father was retired businessman Alfred Bentley, and mother was Emily and he later recalled, The sight of one of Patrick Stirlings eight-foot singles could move me profoundly. My longest day, ” he said, “was London to Leeds and back and this was a total days run of 400 miles, entailing a consumption of about seven tons of coal, every pound of it to be shovelled. He completed his apprenticeship in the summer of 1910 but decided that the railways did not offer him enough scope for a satisfying career, in 1909 and 1910 Bentley raced Quadrant, Rex, and Indian motorcycles. He competed in two Isle of Man Tourist Trophy races, on a Rex in 1909 and as a member of Indians factory team in 1910 and he was fascinated by the cabbies ingenuity at fiddling the meters. In 1912 he joined his brother, H. M. Bentley, fitted with the alloy pistons and a modified camshaft, a DFP took several records at Brooklands in 1913 and 1914. As security considerations prevented his broadcasting the information to engine manufacturers and that man, Commander Wilfred Briggs, would be his senior officer throughout the war. Bentley next visited Louis Coatalen at Sunbeam, with the result that the innovation was used in all their aero engines. Bentley also visited Gwynnes, whose Chiswick factory made French Clerget engines under licence, when the Clerget licensees proved unwilling to implement Bentley’s more important suggestions the Navy gave him a team to design his own aero engine at the Humber factory in Coventry. Designated the BR1, Bentley Rotary 1, the engine was different from the Clerget except in the design of the cam mechanism. A prototype was running in the summer of 1916. The bigger BR2 followed in early 1918, in recognition, Bentley was awarded the MBE. After he was invited In 1920 to make a claim, which the Clerget licensees contested unsuccessfully, after the war, in early 1919, W. O. and his brother founded Bentley Motors Limited. They formed a group at small premises in Cricklewood to turn his aero engines business into one of car production, in a group that included Frank Burgess and Harry Varley, they set about designing a high quality sporting tourer for production under the name Bentley Motors. Clive Gallop joined the team as a designer to help develop their 3,000 cubic centimetres straight-4 engine. The 3-litre engine ran for the first time in New Street Mews, Baker Street, a plaque marks the building in what is now Chagford Street NW1. W. O. ’s first complete Bentley 3 Litre car began road tests in January 1920, W. O. ’s motto was To build a good car, a fast car, the best in class.95 mph
4.
Car classification
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Governments and private organizations have developed car classification schemes that are used for innumerable purposes including regulation, description and categorization, among others. This article details commonly used classification schemes in use worldwide, vehicles can be categorized in numerous ways. Regulatory agencies may also establish a vehicle classification system for determining a tax amount, in the United Kingdom, a vehicle is taxed according to the vehicles construction, engine, weight, type of fuel and emissions, as well as the purpose for which it is used. Other jurisdictions may determine vehicle tax based upon environmental principles, such as the user pays principle, another standard for road vehicles of all types that is used internationally, is ISO 3833-1977. In the United States, since 2010 the Insurance Institute for Highway Safety uses a scheme it has developed that takes into account a combination of both shadow and weight. The United States Federal Highway Administration has developed a scheme used for automatically calculating road use tolls. There are two categories depending on whether the vehicle carries passengers or commodities. Vehicles that carry commodities are further subdivided by number of axles and number of units, the United States Environmental Protection Agency has developed a classification scheme used to compare fuel economy among similar vehicles. Passenger vehicles are classified based on a total interior passenger. Trucks are classified based upon their gross vehicle weight rating, heavy duty vehicles are not included within the EPA scheme. A similar set of classes is used by the Canadian EPA, in Australia, the Federal Chamber of Automotive Industries publishes its own classifications. This is a table listing several different methods of vehicle classification. Straddling the boundary between car and motorbike, these vehicles have engines under 1.0 litre, typically only two passengers, and are sometimes unorthodox in construction. Some microcars are three-wheelers, while the majority have four wheels, microcars were popular in post-war Europe, where their appearance led them to be called Bubble cars. More recent microcars are often electric powered, the size of ultracompact cars will be less than minicars, but have engine greater than 50cc displacement and able to transport 1 or 2 persons. Ultracompact cars cannot use standard, because of strict safety standards for minicars. The regulation about running capacity and safety performance of cars will be published in early autumn. Today, there are smaller than ultracompact cars, called category-1 motorized vehicles which it has 50cc displacement or less
5.
Chassis
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A chassis consists of an internal vehicle frame that supports an artificial object in its construction and use, can also provide protection for some internal parts. An example of a chassis is the underpart of a motor vehicle, if the running gear such as wheels and transmission, and sometimes even the drivers seat, are included, then the assembly is described as a rolling chassis. In the case of vehicles, the rolling chassis means the frame plus the running gear like engine, transmission, drive shaft, differential. An under body, which is not necessary for integrity of the structure, is built on the chassis to complete the vehicle. For commercial vehicles, a rolling chassis consists of an assembly of all the parts of a truck to be ready for operation on the road. The design of a car chassis will be different than one for commercial vehicles because of the heavier loads. Commercial vehicle manufacturers sell chassis only, cowl and chassis, as well as chassis cab versions that can be outfitted with specialized bodies and these include motor homes, fire engines, ambulances, box trucks, etc. In particular applications, such as buses, a government agency like National Highway Traffic Safety Administration in the U. S. defines the design standards of chassis. An armoured fighting vehicles hull serves as the chassis and comprises the part of the AFV that includes the tracks, engine, drivers seat. This describes the hull, although common usage might include the upper hull to mean the AFV without the turret. The hull serves as a basis for platforms on tanks, armoured carriers, combat engineering vehicles. In an electronic device, the chassis consists of a frame or other supporting structure on which the circuit boards. In the absence of a frame, the chassis refers to the circuit boards and components themselves. The combination of chassis and outer covering is called an enclosure. Vietnam Studies, Department of the Army, Washington, D. C.1978
6.
Automobile layout
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In automotive design, the automobile layout describes where on the vehicle the engine and drive wheels are found. Many different combinations of engine location and driven wheels are found in practice, factors influencing the design choice include cost, complexity, reliability, packaging, weight distribution, and the vehicles intended handling characteristics. Layouts can roughly be divided into two categories, front- or rear-wheel drive, four-wheel-drive vehicles may take on the characteristics of either, depending on how power is distributed to the wheels. Front-wheel-drive layouts are those in which the front wheels of the vehicle are driven, the most popular layout used in cars today is the front-engine, front-wheel drive, with the engine in front of the front axle, driving the front wheels. As the steered wheels are also the wheels, FF cars are generally considered superior to FR cars in conditions such as snow, mud. The weight of the engine over the wheels also improves grip in such conditions. Electronic traction control can avoid wheelspin but largely negates the benefit of extra torque/power, a transverse engine is commonly used in FF designs, in contrast to FR which uses a longitudinal engine. This is another reason luxury/sports cars avoid the FF layout, exceptions do exist, such as the Volvo S80 which uses transversely mounted inline 6 and V8 engines, and the Ford Taurus SHO, available with a 60° V8 and front-wheel drive. There are some exceptions to this as rear engine designs do not take away interior space and it also has fewer components overall and thus lower weight. However, this may apply for cars with moderate power-to-weight ratio. According to road test with two Dodge Daytonas, one FWD and one RWD, the layout is also important for what configuration is the fastest. Weight shifting limits the acceleration of a front-wheel-drive vehicle, however, since front-wheel-drive cars have the weight of the engine over the driving wheels, the problem only applies in extreme conditions in which case the car understeers. On snow, ice, and sand, rear-wheel drive loses its traction advantage to front or all-wheel-drive vehicles which have greater weight over the driven wheels. Rear-wheel-drive cars with engine or mid engine configuration retain traction over the driven wheels. A rear-wheel-drive cars centre of gravity is shifted rearward when heavily loaded with passengers or cargo, on front-wheel-drive cars, the short driveshaft may reduce drivetrain elasticity, improving responsiveness. Instead, the tunnel may be used to route the exhaust system pipes. Weight, Fewer components usually means lower weight, improved fuel efficiency due to less weight. Cost, Fewer material components and less installation complexity overall, however, the considerable MSRP differential between a FF and FR car cannot be attributed to layout alone. Few modern family cars have rear-wheel drive as of 2009, so a direct cost comparison is not necessarily possible, assembly efficiency, the powertrain can often be assembled and installed as a unit, which allows more efficient production
7.
Front-engine, rear-wheel-drive layout
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In automotive design, an FR, or front-engine, rear-wheel-drive layout is one where the engine is located at the front of the vehicle and driven wheels are located at the rear. This was the automobile layout for most of the 20th century. Modern designs commonly use the front-engine, front-wheel-drive layout, the first FR car was an 1895 Panhard model, so this layout was known as the Système Panhard in the early years. The layout has the advantage of minimizing mechanical complexity, as it allows the transmission to be placed in-line with the output shaft. In comparison, a vehicle with the engine over the driven wheels eliminates the need for the drive shaft, in order to reduce the relative weight of the drive shaft, the transmission was normally split into two parts, the gearbox and the final drive. The gearbox was produced with its highest gear being 1,1. The final drive, in the axle, would then reduce this to the most appropriate speed for the wheels. As power is the product of torque and angular velocity, spinning the shaft faster for any given power reduces the torque, in an era when gasoline was cheap and cars were heavy, the mechanical advantages of the FR drivetrain layout made up for any disadvantage in weight terms. It remained almost universal among car designs until the 1970s, after the Arab oil embargo of 1973 and the 1979 fuel crises, a majority of American FR vehicles were phased out for the FF layout – this trend would spawn the SUV-van conversion market. Throughout the 1980s and 1990s, most American companies set as a priority the eventual removal of rear-wheel drive from their mainstream, chrysler went 100% FF by 1990 and GMs American production went entirely FF by 1997 except the Corvette, Firebird and Camaro. This configuration is referred to as a transaxle since the transmission. In Europe, front-wheel drive was popularized by small cars like the Mini, Renault 5 and Volkswagen Golf, upscale marques like Mercedes-Benz, BMW, and Jaguar remained mostly independent of this trend, and retained a lineup mostly or entirely made up of FR cars. Japanese mainstream marques such as Toyota were almost exclusively FR until the late 1970s, toyotas first FF vehicle was the Toyota Tercel, with the Corolla and Celica later becoming FF while the Camry was designed as an FF from the beginning. The Supra, Cressida, Crown, and Century remained FR, luxury division Lexus has a mostly FR lineup. Subarus BRZ is an FR car, currently most cars are FF, including all front-engined economy cars, though FR cars are making a return as an alternative to large sport-utility vehicles. In North America, GM returned to production of FR-based luxury vehicles with the 2003 Cadillac CTS, as of 2012, all but the SRX and XTS are FR-based vehicles. Chevrolet reintroduced the FR-based Camaro in 2009, and the Caprice PPV in 2011, Pontiac also had a short run with the FR-based G8 and Pontiac Solstice. A Chevrolet replacement for the G8 called the Chevrolet SS was released in 2013, chrysler and Dodge reintroduced the 300 and Charger on a FR platform
8.
Engine
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An engine or motor is a machine designed to convert one form of energy into mechanical energy. Heat engines burn a fuel to heat, which is then used to create a force. Electric motors convert electrical energy into motion, pneumatic motors use compressed air. In biological systems, molecular motors, like myosins in muscles, use energy to create forces. The word engine derives from Old French engin, from the Latin ingenium–the root of the word ingenious. Pre-industrial weapons of war, such as catapults, trebuchets and battering rams, were called siege engines, the word gin, as in cotton gin, is short for engine. Most mechanical devices invented during the revolution were described as engines—the steam engine being a notable example. However, the steam engines, such as those by Thomas Savery, were not mechanical engines. In this manner, an engine in its original form was merely a water pump. Devices converting heat energy into motion are commonly referred to simply as engines, examples of engines which exert a torque include the familiar automobile gasoline and diesel engines, as well as turboshafts. Examples of engines which produce thrust include turbofans and rockets, the term motor derives from the Latin verb moto which means to set in motion, or maintain motion. Thus a motor is a device that imparts motion, motor and engine later came to be used largely interchangeably in casual discourse. However, technically, the two words have different meanings, however, rocketry uses the term rocket motor, even though they consume fuel. A heat engine may also serve as a prime mover—a component that transforms the flow or changes in pressure of a fluid into mechanical energy. An automobile powered by a combustion engine may make use of various motors and pumps. Another way of looking at it is that a motor receives power from an external source, simple machines, such as the club and oar, are prehistoric. More complex engines using human power, animal power, water power, wind power and these were used in cranes and aboard ships in Ancient Greece, as well as in mines, water pumps and siege engines in Ancient Rome. The writers of those times, including Vitruvius, Frontinus and Pliny the Elder, treat these engines as commonplace, by the 1st century AD, cattle and horses were used in mills, driving machines similar to those powered by humans in earlier times
9.
Straight-six engine
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The straight-six engine or inline-six engine is an internal combustion engine with the cylinders mounted in a straight line along the crankcase with all the pistons driving a common crankshaft. The bank of cylinders may be oriented at any angle, and where the bank is inclined to the vertical, the straight-six layout is the simplest engine layout that possesses both primary and secondary mechanical engine balance, resulting in much less vibration than engines with fewer cylinders. In automobiles, the design is used for engine displacements ranging from approximately 2 to 5 litres. It is also used for smaller engines but these, although very smooth running. Since the length of an engine is proportional to the number of cylinders in one bank. Pre-World War II engines could be large by modern standards — such as the Rolls Royce Silver Ghosts 7.4 L engine and the 824 cu in of the 1910s Peerless, Pierce. They were used in a variety of including the de Havilland Dragon Rapide. The largest are used to ships, and use fuel oil. The straight-six can also be viewed as a modular component of larger motors which stack several straight-sixes together, e. g. flat- or V-12s, W-18s. Straight-six engines were introduced earlier than V6 engines. While the first straight-six was manufactured in 1903 by Spyker, it was not until 1950 that a production V6 was introduced, V6s had intrinsic vibration problems not present in the straight-six. The poor secondary harmonic balance of four-cylinder engines is largely addressed with the use of balance shafts although it can never match the in-line six, TVR used a straight-six configuration exclusively in their final cars before their demise. In a reversal of trends, Mercedes-Benz announced a return to inline-6 engines in October 2016. This was a part of a trend toward higher efficiency engines with fewer cylinders, manufacturers began to replace V8 engines with straight-6 engines and V6 engines with straight-4 engines, while V8 engines became smaller. Straight-sixes continue to be used in medium to large trucks, Ford is one notable exception using a V8 in medium duty trucks. GM pickup trucks abandoned the straight-six in 1984 for the 4.3 V6, in 2002, General Motors introduced the Vortec 4200 as part of the modular straight-four, straight-five and straight-six GM Atlas engine line. It was used in their sport utility vehicles. Jeep abandoned the straight-six in 2006 with the 2006 Jeep Wrangler being the last vehicle, Ram Trucks continues to offer straight-six engines in its heavy duty pickup truck and chassis cab models, although only V6 and V8 engines are available in the smaller versions
10.
Wheelbase
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In both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels. For road vehicles with more than two axles, the wheelbase is defined as the distance between the axle and the centerpoint of the driving axle group. In the case of a truck, the wheelbase would be the distance between the steering axle and a point midway between the two rear axles. The wheelbase of a vehicle equals the distance between its front and rear wheels, at equilibrium, the total torque of the forces acting on a vehicle is zero. So, for example, when a truck is loaded, its center of gravity shifts rearward, the amount the vehicle sinks will depend on counter acting forces like the size of the tires, tire pressure, and the stiffness of the suspension. If the vehicle is accelerating or decelerating, extra torque is placed on the rear or front tire respectively, so, as is common experience, when the vehicle accelerates, the rear usually sinks and the front rises depending on the suspension. Likewise, when braking the front noses down and the rear rises, because of the effect the wheelbase has on the weight distribution of the vehicle, wheelbase dimensions are crucial to the balance and steering. For example, a car with a greater weight load on the rear tends to understeer due to the lack of the load on the front tires. This is why it is crucial, when towing a single-axle caravan, likewise, a car may oversteer or even spin out if there is too much force on the front tires and not enough on the rear tires. Also, when turning there is lateral torque placed upon the tires which imparts a turning force that depends upon the length of the distances from the CM. Wheelbases provide the basis for one of the most common vehicle size class systems, some luxury vehicles are offered with long-wheelbase variants to increase the spaciousness and therefore the luxury of the vehicle. Prime Minister of the United Kingdom Tony Blair was given a version of the Rover 75 for official use. In contrast, coupé varieties of vehicles such as the Honda Accord are usually built on shorter wheelbases than the sedans they are derived from. The wheelbase on many commercially available bicycles and motorcycles is so short, relative to the height of their centers of mass, in skateboarding the word wheelbase is used for the distance between the two inner pairs of mounting holes on the deck. This is different from the distance between the centers of the two wheel pairs. A reason for this use is that decks are sold with prefabricated holes. It is therefore easier to use the holes for measuring and describing this characteristic of the deck. A common misconception is that the choice of wheelbase is influenced by the height of the skateboarder, however, the length of the deck would then be a better candidate, because the wheelbase affects characteristics useful in different speeds or terrains regardless of the height of the skateboarder
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