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Comprex
A pressure wave supercharger (also known as a wave rotor) is a type of supercharger technology that harnesses the pressure waves produced by an internal combustion engine exhaust gas pulses to compress the intake air. Its automotive use is not widespread; the most widely used example is the ''Comprex'', developed by Brown Boveri.A Review of Wave Rotor Technology and its Applications including details of Comprex supercharger Valmet Tractors of Finland were one of the first to use the device when they fitted it to the 411CX engine which powered their 1203 model of 1980. Although it provided a useful increase in performance it was considered too expensive to be incorporated into later models. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Pressure Wave Supercharger
A pressure wave supercharger (also known as a wave rotor) is a type of supercharger technology that harnesses the pressure waves produced by an internal combustion engine exhaust gas pulses to compress the intake air. Its automotive use is not widespread; the most widely used example is the ''Comprex'', developed by Brown Boveri.A Review of Wave Rotor Technology and its Applications including details of Comprex supercharger Valmet Tractors of Finland were one of the first to use the device when they fitted it to the 411CX engine which powered their 1203 model of 1980. Although it provided a useful increase in performance it was considered too expensive to be incorporated into later models. |
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Mazda Capella
The Mazda Capella, also known as the 626 in North America and Southeast Asia, is a mid-size car that was manufactured by Mazda from 1970 until 2002. Sold in the Japanese domestic market under the Capella name, the vehicle was also commonly known in other major markets as the Mazda 626. Ford, Mazda's partner at the time, also used the Capella platform to create the Ford Telstar and Ford Probe. 4,345,279 of the 626 and Telstar models were sold worldwide. Designed to compete against Japanese mid-size stalwarts such as the Honda Accord, Toyota Corona, and Nissan Bluebird, the Capella was succeeded by the Mazda6 (Atenza) in 2002. The car was named after Capella, the brightest star in the constellation Auriga, the sixth-brightest in the night sky and the third-brightest in the northern celestial hemisphere, after Arcturus and Vega. __TOC__ First generation (1970–1978) The first Capella was introduced in May 1970 and lasted until 1978, and was introduced as an interm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Ferrari 126 C
The Ferrari 126C is the car with which Ferrari raced in the 1981 Formula One season. The team's first attempt at a turbocharged Formula 1 car, it was designed by Mauro Forghieri and Harvey Postlethwaite and used between the 1981 and 1984 seasons. The engine chief engineer was Nicola Materazzi. Development and race history 126C (1981): Comprex vs Turbo The Ferrari 126C was designed to replace the highly successful but obsolete 312T series in use since . The basic chassis was almost identical to the previous car but the smaller and narrower V6 engine with forced induction, better suiting the ground effect aerodynamics now needed to be competitive (the previous car's wide flat-12 boxer engine obstructed the airflow necessary to generate efficient ground effect), and was a better package overall. During engine development Ferrari started experimenting with a ''Comprex'' pressure wave supercharger, supplied by a Swiss company; this car version was initially called 126BBC from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Brown Boveri
Brown, Boveri & Cie. (Brown, Boveri & Company; BBC) was a Swiss group of electrical engineering companies. It was founded in Zürich, in 1891 by Charles Eugene Lancelot Brown and Walter Boveri who worked at the Maschinenfabrik Oerlikon. In 1970 BBC took over the Maschinenfabrik Oerlikon. In 1988 it merged with ASEA to form ABB. Early History of BBC Brown Boveri BBC Brown Boveri was established in 1891. The company was one of only a few multinational corporations to operate subsidiaries that were larger than the parent company. Because of the limitations of the Swiss domestic market, Brown Boveri established subsidiaries throughout Europe relatively early in its history, and at times had difficulty maintaining managerial control over some of its larger operating units. The merger with ASEA, a company which was praised for its strong management, was expected to help Brown Boveri reorganize and reassert control over its vast international network. Activity in Britain Brown Bov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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SmILE
A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world, there are large differences among different cultures, religions, and societies, with some using smiles to convey confusion or embarrassment. Evolutionary background Primatologist Signe Preuschoft traces the smile back over 30 million years of evolution to a "fear grin" stemming from monkeys and apes, who often used barely clenched teeth to portray to predators that they were harmless or to signal submission to more dominant group members. The smile may have evolved differently among spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Kadenacy Effect
The Kadenacy effect is an effect of pressure-waves in gases. It is named after Michel Kadenacy who obtained a French patent for an engine utilizing the effect in 1933. There are also European and US patents. In simple terms, the momentum of the exhaust gas leaving the cylinder of an internal combustion engine creates a pressure-drop in the cylinder which assists the flow of a fresh charge of air, or fuel-air mixture, into the cylinder. The effect can be maximized by careful design of the inlet and exhaust passages. Uses The Kadenacy effect has been utilized in pulse jet engines and in two-stroke piston engines and is important in the design of high-performance motorcycle engines. Pulse jets Two-stroke engines In a two-stroke engine the pressure-drop resulting from the Kadenacy effect assists the flow of a fresh fuel-air mixture charge into the cylinder. However, the Kadenacy effect alone is not sufficient and must be boosted in some way. In small engines this is done by cra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Inertial Supercharging Effect
The inertial supercharging effect is the increase of volumetric efficiency in the cylinder of an engine. Background The internal combustion engine is the most common engine found in mechanical devices across the world. The engine is powered by an air/gasoline mixture and the physics principles of heat and pressure. Overview Inertial supercharging effect is the result of incoming fuel/air charge developing momentum greater than intake stroke would generate alone. It is achieved by the careful design of the shape of the piston head, the valves and cam profile/ valve timing which creates a vacuum that pulls more exhaust gases (and some of the intake gasses) out of the engine. This is immediately followed by a reflected pressure wave timed to force the extra intake gasses back into the cylinder, thus achieving a greater mass of air/fuel mix in the combustion chamber than possible with conventional methods. Expansion chambers only work well at a narrow engine speed range which is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Exhaust Pulse Pressure Charging
Exhaust pulse pressure charging (EPPC) is a system for supercharging two-stroke diesel engines of the loop-scavenge type. Loop-scavenge engines cannot be pressure-charged in the same way as uniflow engines or four-stroke engines because the inlet and exhaust ports are open at the same time. Overview The engine usually has a Roots blower to provide air for scavenging and this is arranged to deliver excess air so that air follows the exhaust gases into the exhaust manifold. Some of this air is then forced back into the cylinder by a rise in pressure in the exhaust manifold resulting from the exhaust pulse from another cylinder. For additional pressure charging a turbocharger may be fitted, in series with the Roots blower, but a turbocharger cannot be used alone because it would not provide enough air for scavenging at low speeds. Exhaust Pulse Pressure Charging Advantages and Disadvantages Pulse pressure charging is much more effective with a low load and at low speed than tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Diesel Kiki
Zexel is a Japanese auto-components manufacturer. It was founded in 1939 as Diesel Kiki Co., Ltd., under a Bosch license, for domestic production of fuel-injection pumps for diesel engines. Originally established with an investment from Isuzu Motors Ltd., (a major Japanese manufacturer of engines for heavy-duty vehicles), this company was renamed ZEXEL Corp. in 1990. Diesel-Kiki entered into a joint venture in the United States with Wynns Climate Systems to begin manufacturing automotive HVAC systems in approximately 1987. The company was called Wynn-Kiki at the time and was the predecessor to ZEXEL USA. The ZEXEL rebranding was a two-year project involving a worldwide name search and complete marketing strategy analysis. The company logo featured red, white and blue colors picked to represent precision, technology and excellence. A CD was distributed to employees featuring a new company theme song. The name was compiled from the words zenith and excellence. The company is sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Crankshaft
A crankshaft is a mechanical component used in a piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating shaft containing one or more crankpins, that are driven by the pistons via the connecting rods. The crankpins are also called ''rod bearing journals'', and they rotate within the "big end" of the connecting rods. Most modern crankshafts are located in the engine block. They are made from steel or cast iron, using either a forging, casting or machining process. Design The crankshaft located within the engine block, held in place via main bearings which allow the crankshaft to rotate within the block. The up-down motion of each piston is transferred to the crankshaft via connecting rods. A flywheel is often attached to one end of the crankshaft, in order to smoothen the power delivery and reduce vibration. A crankshaft is subjected to enormous stresses, in some cases more than per cylinder. Crankshafts for single- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Gas Turbine
A gas turbine, also called a combustion turbine, is a type of continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the direction of flow: * a rotating gas compressor * a combustor * a compressor-driving turbine. Additional components have to be added to the gas generator to suit its application. Common to all is an air inlet but with different configurations to suit the requirements of marine use, land use or flight at speeds varying from stationary to supersonic. A propelling nozzle is added to produce thrust for flight. An extra turbine is added to drive a propeller ( turboprop) or ducted fan (turbofan) to reduce fuel consumption (by increasing propulsive efficiency) at subsonic flight speeds. An extra turbine is also required to drive a helicopter rotor or land-vehicle transmission ( turboshaft), marine propeller or electrical generator (power turbine). Grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |