The Motion Modeling and Simulation of the Swash-Plate Engine

2012 ◽  
Vol 548 ◽  
pp. 672-676 ◽  
Author(s):  
Wei Ge Liang ◽  
Zhen Shan Zhang ◽  
Rui Zhu
Keyword(s):  
Modeling And Simulation ◽  
Comprehensive Analysis ◽  
Motion Model ◽  
Connecting Rod ◽  
Motion Modeling ◽  
Swash Plate ◽  
Operating Process ◽  
Inertia Forces ◽  
Kinematical Parameters ◽  
Vibration Noise

In order to conduct a comprehensive analysis and optimization improvements of the swash-plate engine, it is necessary to analyze and discuss the motion of the swash-plate completely. Based on the motion model of the piston and the connecting rod of the engine, the motion tendencies were simulated. The results suggest the circumferential distance can cause vibration, noise, and rough running of the piston and the connecting rod in the operating process. Besides, the inertia forces/moments and the unbalanced motion are considered to be the main sources of the vibration and noise. On the basis of the results, we propose a “∞” guide groove, which can reduce the vibration and noise of the swash-plate engine, to improve the kinematical parameters.

Modeling and Simulation of Hydromechanically Constant Power Controlled Swash Plate Pumps

2006 ◽  
Author(s):  
Saad A. Kassem ◽  
Yasser H. Anis
Keyword(s):  
Mathematical Models ◽  
Modeling And Simulation ◽  
Dynamic Characteristics ◽  
Theoretical Study ◽  
Constant Power ◽  
Static And Dynamic Characteristics ◽  
Valve Spring ◽  
Lever Arm ◽  
Swash Plate ◽  
Static Performance

This paper presents a theoretical study of the performance of constant power operated swash plate pumps equipped with hydromechanical controllers incorporating either pivoted levers or two feedback springs. Mathematical models of these controllers are derived and used to simulate the static and dynamic characteristics of a small pump of 40 cc/rev geometric volume. Results show that the controller with the pivoted lever renders better static and dynamic characteristics compared to the controllers with feedback springs. Results also show that changing the power through varying the lever arm length is preferable than varying the valve spring initial compression, when the dynamic characteristics of the pumps with controllers of pivoted levers are considered. The effect of the valve spring initial compression on the static performance of a pump incorporating a controller with two feedback springs is also investigated.

Harmonic Coefficients of Engine Torque Curves

1943 ◽  
Vol 10 (1) ◽  
pp. A33-A48
Author(s):  
Frederic P. Porter
Keyword(s):  
Diesel Engines ◽  
Combined Effects ◽  
Connecting Rod ◽  
Engine Torque ◽  
Wide Range ◽  
Inertia Forces ◽  
Gas Pressures

Abstract Engine torque curves depend upon the combined effects of gas pressures, inertia forces, and weights. Tables for the harmonic coefficients of the torque due to inertia and weight effects are given for a wide range of crank-to-connecting-rod ratios. Families of indicator diagrams, representative of various types of engines, are shown and tables of the harmonic coefficients of the resulting torques are given. The types of engines considered are two-cycle gas, semi-Diesel, single-acting Diesel, double-acting Diesel, two-shaft opposed-piston Diesel, and four-cycle gasoline and Diesel engines.

Balancing the Moments of a VR5 Engine Taking into Account a Desaxial Crank Mechanism and Cylinder Camber Angle

2020 ◽  
pp. 41-49
Author(s):  
N.D. Chainov ◽  
P.R. Vallejo Maldonado
Keyword(s):  
Relative Displacement ◽  
Working Fluid ◽  
Inertial Forces ◽  
Structural Elements ◽  
Connecting Rod ◽  
Cylinder Axis ◽  
Acoustic Characteristics ◽  
Camber Angle ◽  
Inertia Forces ◽  
Crank Mechanism

Automobile piston engines with a desaxial crank mechanism are characterized by increased vibration activity associated with a cyclic change in the pressure of the working fluid in the cylinders and inertial forces associated with the reciprocating and rotational movement of the crank mechanism moving masses. Properties reflecting the consumer properties of the engine, including acoustic characteristics, are largely determined by the level of vibration of the structural elements of the desaxial crank mechanism and, first of all, by the balance of inertial forces during operation. The article discusses balancing of five-cylinder four-stroke VR type engines with a desaxial crank mechanism and uniform flash alternation. The authors introduce formulas that can be used to determine and analyze moments of the inertia forces of the reciprocating and rotating masses arising in VR5 engines at the set values of the cylinder camber angle, the ratio of the crank radius to the connecting rod length and the relative displacement of the cylinder axis. A method of balancing the moments of inertia forces of the reciprocating and rotating masses is proposed.

Summary 1: The Influence of Engine Component Inertia Forces on Minimum Oil Film Thickness in Connecting Rod Big-End Bearings

1966 ◽  
Vol 181 (2) ◽  
pp. 155-155
Author(s):  
J. F. Booker ◽  
F. A. Martin
Keyword(s):  
Film Thickness ◽  
Graphical Form ◽  
Load Carrying Capacity ◽  
Eccentricity Ratio ◽  
Connecting Rod ◽  
Oil Film ◽  
First Approximation ◽  
Load Carrying ◽  
The Many ◽  
Inertia Forces

when Designing steadily loaded bearings the designer can usually predict the position of the journal centre quite easily with the aid of one of the many load carrying capacity/eccentricity relationships available. With dynamically loaded bearings, however, the journal path will vary in magnitude and direction throughout the loading cycle and one of the designer's interests is in the trends of maximum eccentricity ratio and the corresponding oil film thickness for various bearing and engine conditions. From experience with journal path predictions for big-end bearings it has been found that the eccentricity ratio in the bearing due to the peak firing load seldom exceeds that obtained by the inertia load loop (although this load is smaller) and therefore, as a first approximation, it is thought justifiable to neglect the gas forces. The results of this inertia study (numerical solution) applied to big-end bearings are presented in a general graphical form. Further work can be carried out on the same basis for main bearings, but this is more difficult to present in a general fashion as there are many more variables to consider, such as the phasing and magnitude of the crank out of balance and the firing order. This report therefore concentrates on the first step, i.e. that of big-end bearings.

Research on the Fracture Splitting Technology of Connecting Rod Based on Car TSI Engine

2013 ◽  
Vol 791-793 ◽  
pp. 631-634 ◽  
Author(s):  
Tian Ming Liu ◽  
Wen Xu ◽  
Wei Dong Feng
Keyword(s):  
Chemical Composition ◽  
Theoretical Analysis ◽  
Physical Properties ◽  
Comprehensive Analysis ◽  
Process Parameter ◽  
Connecting Rod ◽  
Mechanical And Physical Properties ◽  
Type Fracture ◽  
Fracture Splitting ◽  
New Type

The research of the expanding broken technology of engine connecting rod (also known as the fracture splitting technology) is based on some known factors which effect on connecting rod splitting to make comprehensive analysis on 36MnVS4, the material of connecting rod which is suitable for the fracture splitting technology, it analyses the effect of each chemical composition in steel on mechanical and physical properties, for material steel of new type fracture splitting connecting rod , and makes a theoretical analysis on the fracture splitting technology of the engine connecting rod. Through the analysis and research, a new method to research the fracture splitting of connecting rod is determined, as well as gets some rules to affect process parameter.

scholarly journals Multi-body Motion Modeling and Simulation for Tilt Rotor Aircraft

2010 ◽  
Vol 23 (4) ◽  
pp. 415-422 ◽  
Author(s):  
Li Haixu ◽  
Qu Xiangju ◽  
Wang Weijun
Keyword(s):  
Modeling And Simulation ◽  
Body Motion ◽  
Motion Modeling ◽  
Tilt Rotor ◽  
Multi Body

Analytical Modeling and Simulation of a Swash Plate Pump/Motor

2008 ◽  
Author(s):  
Christopher C. Schroeder ◽  
Amin Mohaghegh Motlagh ◽  
The M. Nguyen ◽  
Mohammad H. Elahinia
Keyword(s):  
Modeling And Simulation ◽  
Analytical Modeling ◽  
Swash Plate

Rolling Friction Performance Analysis of Swash-Plate Engine in Underwater Vehicle

2011 ◽  
Vol 80-81 ◽  
pp. 855-859
Author(s):  
Wei Ge Liang ◽  
Zhen Shan Zhang ◽  
Lan Luo
Keyword(s):  
Friction Coefficient ◽  
Friction Force ◽  
Basic Structure ◽  
Rolling Friction ◽  
Friction Model ◽  
Friction Property ◽  
Swash Plate ◽  
Operating Process ◽  
Friction Performance ◽  
Rolling Friction Coefficient

Friction property plays an important role in the operating process of engine, the analysis and discuss about friction property can help to improve the operating performance of engine. Based on the basic structure of swash-plate engine, the sphere rolling friction model and the roller rolling friction model were established, and corresponding formulae of the rolling friction force and the rolling friction coefficient were deduced. Then as an application, we employed the exact parameters of a swash-plate engine to calculate the sphere rolling friction force, the sphere rolling friction coefficient, the roller rolling friction force and the roller rolling friction coefficient. According to comparison, we concluded that roller rolling friction force was far less than sphere rolling friction force, and roller rolling friction coefficient was far less than sphere rolling friction coefficient. Furthermore, we proposed two topics which would be our next study concerning engine friction property: friction-induced heat, and high temperature influence on friction property.

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