Dynamics Simulation Model for the Internal Combustion Engine Valve Gear

Vasilyev, Alexander; Bakhracheva, Yulia; Storojakov, S.Y.

doi:10.1016/j.proeng.2016.07.017

Cited by 25 publications

(5 citation statements)

References 1 publication

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“…Vasilyev et al [73] stated that the valve spring has the lowest stiffness and exhibits the lowest natural frequency compared to other valve train components.…”

Section: Valve Springs In Valvetrains Of Cesmentioning

confidence: 99%

The effect of machined valve springs application on dynamic properties of electro-hydraulically driven valve train

Szydłowski

Siczek

2022

Combustion Engines

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Nowadays, the constant striving to reduce the emission and increase the overall efficiency over a wide range of speeds and loads of the internal combustion engine (CE) is observed. The different methods for improving the charge exchange in the engine, particularly ones based on the variable valve timing are sought. This variability can be achieved, among others by using the electrohydraulic valve drive. The goal of the present study is to compare the dynamic parameters of the engine valvetrain utilizing the unilateral electrohydraulic valve drive and various types of valve springs. The model of such a drive being developed by authors and experimentally verified was used for the analysis. Using the Finite Element Method, the models of springs made through the machining from single sleeves were developed. The effect of various geometrical parameters of the modernized springs on their stiffness and on the resulted valvetrain dynamics was examined.

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“…Vasilyev et al [73] stated that the valve spring has the lowest stiffness and exhibits the lowest natural frequency compared to other valve train components.…”

Section: Valve Springs In Valvetrains Of Cesmentioning

confidence: 99%

The effect of machined valve springs application on dynamic properties of electro-hydraulically driven valve train

Szydłowski

Siczek

2022

Combustion Engines

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“…the desired functions will be T(x, t) and U(x, t). The initial boundary value problem for these functions will have the following form [6][7][8]:…”

Section: A Mathematical Model Of the Drying Platementioning

confidence: 99%

“…In these formulas: σthe Stefan-Boltzmann constant; Аthe coefficient of thermal radiation; TB and ψthe temperature and humidity of the air beyond the boundary layer; aw and amthe coefficients of heat and mass exchange of the sample surface with the air medium; P(T)a function that models the dependence of the relative partial pressure of saturated water vapor on its temperature T at General normal pressure; T1=273°C and T2=238°Cconstants. The intensity of heat exchange Q, according to (7), includes heat exchange by convection and heat exchange by radiation, and the intensity of mass exchange J, according to (8), is taken as Dalton's law of evaporation.…”

Section: A Mathematical Model Of the Drying Platementioning

confidence: 99%

Optimization of the plate drying process by electromagnetic radiation using the Green function method

Afanas’ev

Bakhracheva

2021

E3S Web Conf.

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An initial boundary value problem is formulated for calculating the heat-mass-energy fields in a homogeneous wet plate. To solve this problem, an original algorithm containing elements of analytical and numerical methods has been developed. In this method, solutions are written using the spatially one-dimensional Green function of the Neumann problem, which contains eigenvalues and eigenfunctions of the Sturm-Liouville boundary value problem. In comparison with the known numerical algorithms, the problems of the theory of electromagnetic drying for which its application can be effective are indicated. It is shown that the discrete supply of microwave energy significantly reduces the gradients of temperature, steam and moisture content, while reducing energy consumption by 11...12 %. The probability of an undesirable spontaneous temperature increase at the end of the drying cycle is significantly reduced, and the electrical and thermal conditions of the microwave energy source are improved.

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“…1. A three-arc concave cam obtained using a mathematical model for the central cam mechanisms of the valve drive [12]. In order to select the profile parameters that provide the longest time-section of the valve, mathematical methods of experiment planning were used in the construction of this model.…”

Section: Mathematical Modelmentioning

confidence: 99%

Improving the energy efficiency of a piston engine based on the use of a numerical method for forming the laws of motion of gas distribution valves

2021

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The increase in the power, economic and environmental performance of modern internal combustion engines is largely due to the improvement of the system that controls the gas exchange processes. Its characteristics determine the quality of filling and cleaning of the cylinders in various operating modes, the loss of power for gas exchange and, consequently, the indicator and effective indicators of the engine. The issues of mathematical modeling of gas exchange processes in combination with the study and improvement of the gas distribution mechanism are considered. The results of experimental and computational studies of gas exchange of tractor diesel are presented. Reserves for improving the gas exchange and the engine as a whole are identified based on the choice of optimal valve timing phases and valve motion laws. They provide a reduction in the modulus of the average pressure of the pump passages in the range of operating modes by 12 - 14 %, which contributed to a decrease in the specific effective fuel consumption by 1.4 ÷ 2.2 g/kWh. The above allows us to conclude that the use of a generalized step-by-step numerical method for synthesizing the law of motion of a pusher with an upper stand allows us to obtain the maximum efficiency characteristics of the gas distribution in the presence of a number of restrictions.

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Dynamics Simulation Model for the Internal Combustion Engine Valve Gear

Cited by 25 publications

References 1 publication

The effect of machined valve springs application on dynamic properties of electro-hydraulically driven valve train

The effect of machined valve springs application on dynamic properties of electro-hydraulically driven valve train

Optimization of the plate drying process by electromagnetic radiation using the Green function method

Improving the energy efficiency of a piston engine based on the use of a numerical method for forming the laws of motion of gas distribution valves

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