Method and device for increasing weight charging of four-stroke engine cylinders
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- Category: Geotechnical and mining mechanical engineering, machine building
- Last Updated on 17 November 2017
- Published on 17 November 2017
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Authors:
S.O.Korol, Cand. Sc. (Tech.), Assoc. Prof., Kremenchuk Mykhailo Ostrohradskyi National University, Associate Professor of the Department of Transport Technologies, Kremenchuk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
M.M.Moroz, Dr. Sc. (Tech.), Prof., Kremenchuk Mykhailo Ostrohradskyi National University, Professor of the Department of Transport Technologies, Head of the department, Kremenchuk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
S.S.Korol, Kremenchuk Mykhailo Ostrohradskyi National University, graduate student, Kremenchuk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">portkor@mail.ua
S.A.Serhiienko, Cand. Sc. (Tech.), Assoc. Prof., Kremenchuk Mykhailo Ostrohradskyi National University, Associate Professor of the Department of Systems of Automatic Control and Electric Drive, Vice-rector on Scientific-pedagogical Work and Innovation Technologies in Education, Kremenchuk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract:
Purpose. Determination of the possibility of infinitely variable control of the angle of closure delay of the inlet valve of a four-cycle internal combustion engine at a fired engine in order to improve the cylinder weight charging by means of the method of infinite variation of the camshaft angular rate at the end of the intake phase.
Methodology. An analytical model of determination of the law of instantaneous reduction ratio j (2) is worked out and it is proposed to rotate the inlet valve shaft unevenly, changing unevenness consecutively and infinitely. Unevenness degree is varied by shift of phases of two identical periodical laws of uneven rotation.
Findings. A curve explaining the character of variation of reduction ratios between the camshaft and the crankshaft of the four-cycle four-cylinder engine is obtained. Along the crankshaft rotation angle there are regular intervals of the moments of the start of fuel mixture or air feed into the cylinder. Curves ωmax(2), ωІ(2), ωІІ(2) are shown; they explain the degree of variation of angular rate of the camshaft (inlet valve drive shaft) for the maximum operating mode of the internal combustion engine (ω2max) and two high-speed modes (ω2І and ω2ІІ) at reduced values of rotation frequencies of its shaft (ω2max > ω2І). Unevenness of the analyzed rotation of the camshaft is increased when the engine crankshaft turns decrease, or it may remain unchanged. It is proposed to use a planetary-lever controlled drive for the camshaft drive and the drive kinematic scheme is presented.
Originality. A method for improvement of the engine cylinder weight charging due to infinite variation of the cam-shaft angular rate at the end of the intake phase and infinite control of angular rotation rate (of the camshaft) of the inlet valve drive shaft is worked out; a kinematic scheme of a double planetary-lever drive is proposed
Practical value. Implementation of the proposed method and device of control of inlet valve closure delay angle in internal combustion engines, and the worked out method for control of the angle rate of the inlet valve drive shaft enables infinite control depending on the fired engine operating mode. It also allows provision of optimum angle of inlet valve closure delay during the intake phase and improvement of weight charging of the cylinders with fuel mixture or air at medium and low frequencies of the engine speed range.
References:
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2. Moroz, М. М., Korol, S. О. and Boiko, Y. О., 2016. Social traffic monitoring in the city of Kremenchuk. Actual Problems of Economics, 1(175), рр. 385–398.
3. Patrahaltsev, N. N., 2009. Unbalanced conditions of combustion engine operation: Monograph. Мoscow: RUDN.
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