"Cetatuia" of "Cetateni", is a Church in the Romanian mountains, founded approximately at the year 1300, by "Negru Voda Basarab", The Founder of Romania.
Prof. at Polytechnic University of Bucharest
"Theory of Mechanisms and Robots" Department
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Dynamics Research
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PhD. Prof. at Polytechnic University of Bucharest
TMR Department (Theory of Mechanisms and Robots)
Member of FISITA and IFToMM
Expert in:
Engines, Otto Engines, Powertrain,
Cam Gears, Otto Mechanisms, Camshaft,
Drivetrain, Gearbox, Noise and Vibration
See My Webs:
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Keywords: Hydrogen, Energy, Combustibles costs, Compact Otto engines, Burning process, Shaft rotation, Engines without emissions
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In some papers "about gears" or "gears efficiency", the authors present an original method to determine the efficiency of the gear. The originality of this method relies on the eliminated friction modulus. One analyses the influence of a few parameters concerning gear efficiency. These parameters are: z1 - the number of teeth for the primary wheel of gear; z2 - the number of teeth of the secondary wheel of gear; alfa0 - the normal pressure angle on the divided circle; �eta - the inclination angle. With the relations presented, one can synthesize the gear's mechanisms. Today, the gears are present everywhere, in the mechanical's world (In vehicle's industries, in electronics and electro-technique equipments, in energetically industries, etc...). Optimizing this mechanism (the gears mechanism), one can improve the functionality of the transmissions with gears; one save energy and one diminish the pollutions. If one increase theirs efficiency with one percent only, one obtains a very much economy of energy and one diminish substantially the noises, the vibrations and the emissions of noxious. The authors suggest an increase of the gears efficiency not only with one percent, but also with ten--twenty percents. In this mode one save more energy and one decrease substantially the pollutions.
Keywords: Gears, Gearing, Efficiency, Dynamics, Energy, Forces, Velocities, Powers, Efficiency at Gears and Gearing, Drivetrain Research
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Keywords: Efficiency, force, piston, crank, connecting-rod, motor, stroke, bore, kinematical diagram, the radius of crank.
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Keywords: Motor-force, Resistant-force, Variable internal amortization, Differential equation, Valve rocker, Valve push rod Valve lifter Valve spring
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The paper �The Efficiency of Cam (Gear)� presents an original method which may determine the efficiency of a mechanism with cam and follower. The originality of this method consists of eliminating the friction modulus. In this paper one analyzes four types of cam mechanisms: 1.The mechanism with rotary cam and plate translated follower; 2.The mechanism with rotary cam and translated follower with roll; 3.The mechanism with rotary cam and rocking-follower with roll; 4.The mechanism with rotary cam and plate rocking-follower. The consumed motor force, Fc, perpendicular in A on the vector rA, is divided in two components: a) Fm, which represents the useful force, or the motor force reduced to the follower; b) the sliding force between the two profiles of cam and follower, (see the picture 1). See the written relations (2.1-2.10). See this paper from one of these websites:
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