汽车专业毕业设计-翻译-中英文(全)quasiturbine-future-trends-in-automobile-engine.doc
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1、This document is available at Seminar ReportQuasiturbine Future Trends in Automobile Engine ByPRADHAN KALPESH HEMANT (B.E MECHANICAL)N.D.M.V.P.S.s COLLEGE OF ENGINEERINGGANGAPUR ROAD, NASIK - 422013 INDIAkalp_pr13 kalpeshpradhanJanuary 2006ABSTRACTThe inventors have made a systematic analysis of eng
2、ine concepts, their value, their weaknesses, and their potential for improvement. All improvement ideas converged when they suggested making a turbo-shaft turbine having only one turbine in one plane. In order to achieve that, the inventors had to attach the turbine blades one to another in a chain
3、like configuration, where the rotor acts as compressor for a quarter of a turn, and as engine the next quarter of a turn. This is the Quasiturbine! Many researches are going on to increase energy efficiency on the long term with piston, hydrogen, fuel cell. Hybrid concepts are ways to harvest part o
4、f the low power efficiency penalty of the piston engine used in vehicle, but counter-productive measures limit the long term perspective until they could efficiently fuel from the electrical grid. None of these solutions are short term stable and competitive.The Quasiturbine in Beau de Rocha (Otto)
5、cycle is a relatively simple technology which could be widely used within a few years with substantial efficiency benefits over piston engines in many applications. Large utility plants convert energy more efficiently than small distributed units and should be favored when possible, but on the long
6、term, the Quasiturbine detonation engine (AC model with carriages) is one of the very few means to match utility efficiency the distributed way, while being as chemically clean as possible.By opposition to dozens of new engine designs, the most important at this time about the Quasiturbine is the fa
7、ct that it does unknot a new field of development and offers means to achieve what no other engine design has suggested or is able to, and specially for detonation where piston engine has failed for over 40 years.INDEX What is Quasiturbine? How it works? How does it turn? Why is the Quasiturbine Hyd
8、rogen Engine superior to conventional IC engine? Advantages of Quasiturbine Applications of Quasiturbine Conclusion References What is Quasiturbine?The Quasiturbine (Qurbine) is a no crankshaft rotary engine having a 4 faces articulated rotor with a free and accessible center, rotating without vibra
9、tion nor dead time, and producing a strong torque at low RPM under a variety of modes and fuels. The Quasiturbine design can also be used as an air motor, steam engine, gas compressor or pump. The Quasiturbine is also an optimization theory for extremely compact and efficient engine concepts How it
10、WorksIn the Quasiturbine engine, the four strokes of a typical cycle de Beau de Rochas (Otto) cycle are arranged sequentially around a near oval, unlike the reciprocating motion of a piston engine. In the basic single rotor Quasiturbine engine, an oval housing surrounds a four-sided articulated roto
11、r which turns and moves within the housing. The sides of the rotor seal against the sides of the housing, and the corners of the rotor seal against the inner periphery, dividing it into four chambers. Quasiturbine combustion cycle Intake (aqua), Compression (fuchsia), Combustion (red), Exhaust (blac
12、k). A spark plug is located at the top (green) As the rotor turns, its motion and the shape of the housing cause each side of the housing to get closer and farther from the rotor, compressing and expanding the chambers similarly to the strokes in a reciprocating engine. However, whereas a four strok
13、e piston engine produces one combustion stroke per cylinder for every two revolutions, the chambers of the Quasiturbine rotor generate height combustion strokes per two rotor revolutions; this is eight times more than a four-strokes piston engine. Because the Quasiturbine has no crankshaft, the inte
14、rnal volume variations do not follow the usual sinusoidal engine movements, which provide very different characteristics from the piston or the Wankel engine. Contrary to the Wankel engine where the crankshaft moves the rotary piston face inward and outward, each Quasiturbine rotor face rocks back a
15、nd forth in reference to the engine radius, but stays at a constant distance from the engine center at all time, producing only pure tangential rotational forces.The four strokes piston has such a long dead time, its average torque is about 1/8 of the peak torque, which dictate the robustness of the
16、 piston construction. Since the Quasiturbine has not dead time, average torque is only 30% lower than the peak torque, and for this reason, the relative robustness of the Quasiturbine need be only 1/5 of that of the piston, allowing for an additional engine weight saving. Why does it Turn? This diag
17、ram show the force vector in a Quasiturbine when one or two opposed chambers are pressurized either by fuel combustion, or by external pressure fluids. Because the pressure vectors are off center, the Quasiturbine rotor experiences a net rotational force. It is that simple! Quasiturbine as an Immine
18、nt SolutionMany researches are going on to increase energy efficiency on the long term with piston, hydrogen, fuel cell. Hybrid concepts are ways to harvest part of the low power efficiency penalty of the piston engine used in vehicle, but counter-productive measures limit the long term perspective
19、until they could efficiently fuel from the electrical grid. None of these solutions are short term stable and competitive.The Quasiturbine in Beau de Rocha (Otto) cycle (Model SC without carriages) is a relatively simple technology which could be widely used within a few years with substantial effic
20、iency benefits over piston engines in many applications. Large utility plants convert energy more efficiently than small distributed units and should be favored when possible, but on the long term, the Quasiturbine detonation engine is one of the very few means to match utility efficiency the distri
21、buted way, while being as chemically clean as possible. QT-AC (With carriages) is intended for detonation mode,where high surface-to-volume ratio is a factor attenuating the violence of detonation.By opposition to dozens of new engine designs, the most important at this time about the Quasiturbine i
22、s the fact that it does unknot a new field of development and offers means to achieve what no other engine design has suggested or is able to, and specially for detonation where piston engine has failed for over 40 years. Why is the Quasiturbine Hydrogen Engine superior to conventional IC engine?Pis
23、ton DeficienciesPiston engine deserves respect and should not be arbitrary and globally condemns. However it has deficiencies that no one seems to be willing to list? Here is our list of the main conceptual piston engine deficiencies: The 4 engine strokes should not be of equal duration. The piston
24、makes positive torque only 17 % of the time and drag 83 % of the time. The gas flow is not unidirectional, but changes direction with the piston direction. While the piston descents, the ignition thermal wave front has hard time trying to catch the gas moving in that same direction. The valves open
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