Abstract
In this study the author presents shortly some few original trigonometric methods to make the synthesis of some main distribution mechanisms. One presents four main modules of distribution mechanisms, with rotary cam and translated or rotated tappet plane or with roll, used with priority at the distribution mechanisms from the heat engines with internal combustion. These types of distribution mechanisms can improve the changes of gases and may decrease significantly the level of vibration, noises and emissions. As long as we produce electricity and heat by burning fossil fuels is pointless to try to replace all thermal engines with electric motors, as loss of energy and pollution will be even larger. However, it is well to continuously improve the thermal engines, to reduce thus fuel consumption. At the heat engine with internal combustion a great loss of power is realized and by the distribution mechanism, reason for that we must try to improve the functionality of this mechanism. The synthesis of these types of distribution mechanisms can be made shortly by the Cartesian coordinates, but to determine these coordinates we need and some trigonometric parameters of the mechanisms.
Highlights
In full energy crisis since 1970 until today, production and sale of cars equipped with internal combustion heat engines has skyrocketed, from some millions yearly to over sixty millions yearly and the world fleet started from tens of millions reached today the billion
At the heat engine with internal combustion a great loss of power is realized and by the distribution mechanism, reason for that we must try to improve the functionality of this mechanism
1988; Hrones, 1948; Karikalan et al, 2013; Leidel, 1997; Mahalingam and Ramesh Bapu, 2013; Naima and Liazid, 2013; Narasiman et al, 2013; Petrescu and Petrescu, 1995; 2005a; 2005b; Petrescu et al, 2005; Petrescu, 2008; Petrescu and Petrescu, 2014; 2013a; 2013b; 2011; Petrescu, 2012a; 2012b; Petrescu and Petrescu, 2013c; 2013d; Rahmani et al, 2013; Ravi and Subramanian, 2013; Ronney et al, 1994; Samim and Tümer, 1993; Sapate and Tikekar, 2013; Sethusundaram et al, 2013; Shriram, 2012; Taraza, 2002; Wang, 2011; Xianying, 2011; Zahari et al, 2013; Zhao et al, 2012). These types of distribution mechanisms can improve the changes of gases and may decrease significantly the level of vibration, noises and emissions, if designed properly
Summary
Distribution mechanisms with rotary cam and translational movement or rotating tappet plane or with roller have all a unique kinematic due primarily of the any mechanism geometry, which forces us to study them in greater detail if we need to determine the kinematic and dynamic precision of these mechanisms (Amoresano et al, 2013; Anderson, 1984; Angelas and Lopez-Cajun, 1988; Antonescu et al, 2000; Antonescu et al, 1987; Barzegari, 2011; Bishop, 1950; Choi and Kim, 1994; De Falco et al, 2013a; 2013b; Ganapathi and Robinson, 2013; Giordana et al, 1979; Hain, 1971; Heywood, 1988; Hrones, 1948; Karikalan et al, 2013; Leidel, 1997; Mahalingam and Ramesh Bapu, 2013; Naima and Liazid, 2013; Narasiman et al, 2013; Petrescu and Petrescu, 1995; 2005a; 2005b; Petrescu et al, 2005; Petrescu, 2008; Petrescu and Petrescu, 2014; 2013a; 2013b; 2011; Petrescu, 2012a; 2012b; Petrescu and Petrescu, 2013c; 2013d; Rahmani et al, 2013; Ravi and Subramanian, 2013; Ronney et al, 1994; Samim and Tümer, 1993; Sapate and Tikekar, 2013; Sethusundaram et al, 2013; Shriram, 2012; Taraza, 2002; Wang, 2011; Xianying, 2011; Zahari et al, 2013; Zhao et al, 2012). The δ pressure angle (that occurs between normal n gone through the contact point A and a vertical line) has the known size given by the relations (2.5-2.7): cosα A = e + rb ⋅ sinδ rA sinα A = s0 + s − rb ⋅ cosδ rA (2.10) (2.11) It can be drawn directly the cam profile using polar coordinates rA (known, see relation 2.9) and θA (which is determined by relations 2.12-2.17):. One presents shortly one known method to determine the pressure angle δ at the rotary cam and rocking tappet with roll (Module F, Fig. 11). This profile support a drive shaft rotation speed of 30000 [rpm]
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