Target detection of automobile engine connecting rod image based on sub-pixel level

2021 ◽  
Author(s):  
Hongjuan Yang ◽  
Decai Meng ◽  
Lei Wang ◽  
Yunchu Zhang ◽  
Jianrong Cao
Keyword(s):  
Target Detection ◽  
Connecting Rod ◽  
Automobile Engine

Optimization of the Wrist Pin End of an Automobile Engine Connecting Rod With an Interference Fit

1990 ◽  
Vol 112 (3) ◽  
pp. 406-412 ◽  
Author(s):  
Vijay Sarihan ◽  
Ji Oh Song
Keyword(s):  
Finite Element ◽  
Optimum Design ◽  
Three Dimensional ◽  
Stress Singularity ◽  
Design Strategy ◽  
Structural Components ◽  
Connecting Rod ◽  
Fem Model ◽  
Automobile Engine ◽  
Interference Fit

Current design procedures for complicated three-dimensional structural components with component interactions may not necessarily result in optimum designs. The wrist pin end design of the connecting rod with an interference fit is governed by the stress singularity in the region where the wrist pin breaks contact with the connecting rod. Similar problems occur in a wide variety of structural components which involve interference fits. For a better understanding of the problems associated with obtaining optimum designs for this important class of structural interaction only the design problems associated with the wrist pin end of the rod are addressed in this study. This paper demonstrates a procedure for designing a functional and minimum weight wrist pin end of an automobile engine connecting rod with an interference fit wrist pin. Current procedures for Finite Element Method (FEM) model generation in complicated three-dimensional components are very time consuming especially in the presence of stress singularities. Furthermore the iterative nature of the design process makes the process of developing an optimum design very expensive. This design procedure uses a generic modeler to generate the FEM model based on the values of the design variables. It uses the NASTRAN finite element program for structural analysis. A stress concentration factor approach is used to obtain realistic stresses in the region of the stress singularity. For optimization, the approximate optimization strategy in the COPES/CONMIN program is used to generate an approximate design surface, determine the design sensitivities for constrained function minimization and obtain the optimum design. This proposed design strategy is fully automated and requires only an initial design to generate the optimum design. It does not require analysis code modifications to compute the design sensitivities and requires very few costly NASTRAN analyses. The connecting rod design problem was solved as an eight design variable problem with five constraints. A weight reduction of nearly 27 percent was achieved over an existing design and required only thirteen NASTRAN analyses. It is felt that this design strategy can be effectively used in an engineering environment to generate optimum designs of complicated three-dimensional components.

scholarly journals DESIGN, ANALYSIS AND COMPARISON OF VARIOUS MATERIALS FOR CONNECTING ROD

2020 ◽  
pp. 53-61
Author(s):  
Sumant R Balli ◽  
Prajwal Shetty ◽  
S.C.Sajjan
Keyword(s):  
Titanium Alloy ◽  
Magnesium Alloy ◽  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
3D Model ◽  
Connecting Rod ◽  
Automobile Engine ◽  
Ansys Apdl ◽  
Engine Component ◽  
Alloy Titanium

Connecting rod is engine component which transmits motion from piston to the crankshaft and serves as lever arm. The function of connecting rod is to convert piston’s reciprocal movement into rotary motion of the crankshaft. Connecting rod generally made from Carbon steel and Aluminium alloys have been used in recent days and some different materials are finding it’s application. The performance connecting rod in automobile engine is influenced by it’s design and weight for production of durable, cheaper and light connecting rod, hence optimization and analysis of connecting rod. The 3D model of connecting rod is designed and developed using CATIA V5. In proposed approach different materials compared like Aluminium alloy 7075, Magnesium alloy, Titanium alloys (Ti -3Al- 2.5V) and beryllium alloy (25) are taken for the analysis of connecting rod and factors like Stress, Strain and Deformation were obtained. The purpose of this study is identify best materials for connecting rod, after analysing at ANSYS APDL 15.0. KEYWORDS : Connecting rod, CATIA V5, ANSYS APDL15.0, Aluminium alloy 7075, Magnesium alloy, Titanium alloy (Ti-3Al-2.5V) and Beryllium Alloy (25).

Dynamic Co-Simulation of Fracture Splitting Machine for Connecting Rods

2010 ◽  
Vol 20-23 ◽  
pp. 294-298
Author(s):  
Li Ming Zheng ◽  
Shen Hua Yang ◽  
Wen Ming Jin
Keyword(s):  
Hydraulic System ◽  
Manufacturing Industry ◽  
Influence Factors ◽  
Processing Technique ◽  
Connecting Rod ◽  
Working Pressure ◽  
Automobile Engine ◽  
Fracture Splitting ◽  
Simulation Results ◽  
New Processing

The fracture splitting (FS) method is a bran-new processing technique in the automobile engine connecting rod manufacturing industry, FS is one of three pivotal working procedures, and press speed is one of the key influence factors of FS process. In order to realize parameters of press speed and pull cylinder working pressure, dynamic simulation of hydraulic system has been carried out. Simulation results indicated that press speed of pull cylinder was about 130mm/s, which was between 120mm/s and 150mm/s that was not only good for controlling FS quality, but also not leading irrational design of hydraulic system. The working pressure of pull cylinder was between 10MPa and 14MPa, which was suitable for FS processing. The hydraulic system of FS machine can satisfy the basic requirements of connecting rods FS process. This paper has provided reliable theoretic basis for the design of FS machine for connecting rods.

The Study on Automobile Engine Visual Simulation Based on Vega Prime

2012 ◽  
Vol 246-247 ◽  
pp. 322-326
Author(s):  
Kan Liu ◽  
Wei Wu Ren ◽  
Yang Dong ◽  
Xue Tao Han ◽  
Yuan Lin
Keyword(s):  
Mathematical Model ◽  
Reference Value ◽  
Valve Train ◽  
Dynamics Simulation ◽  
Visual Simulation ◽  
Mechanical Transmission ◽  
Connecting Rod ◽  
User Interactions ◽  
Automobile Engine ◽  
The Mathematical Model

The key technology of visual simulation, of automobile engine is introduced in this paper. The mathematical model of crank connecting rod, and then-the mathematical model of the valve train get the results data Adams in dynamics simulation. The scene is driving. And the user interactions between the virtual environment is based on the prime minister and only once. Realization and system connecting rod crank-also in connection of valve and train. It has well real-time and soaked, and will bring reference value to the research of visual simulation system several similar mechanical transmission.

Fatigue Reliability Analysis on Connecting Rod of Automobile Engine Using Artificial Neural Network Method

2014 ◽  
Vol 501-504 ◽  
pp. 1092-1095
Author(s):  
Li Rong Sha ◽  
Yong Chun Shi
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Fatigue Reliability ◽  
Connecting Rod ◽  
Automobile Engine ◽  
Performance Function ◽  
Neural Network Method ◽  
Network Method ◽  
Artificial Neural Network Method ◽  
Artificial Neural

The artificial neural network method is adopted to solve the reliability analysis of the automobile engine. When the limit state function of structure is highly complex or with non-linearity, it is time-consuming to calculate the reliability with traditional reliability methods. The artificial neural network method is used to analyze the fatigue reliability of connecting rod of automobile engine. The working process of the connecting rod is simulated with UG software, the dynamics analysis on crank-connecting rod-piston mechanism is performed with ANSYS and ADAMS software, with the finite element analysis results, the stress information of the critical point of the connecting rod can be obtained, so the performance function of the structure can be established. The artificial neural network method is used to fit the performance function as well as its derivatives, so as to calculate the reliability of the structure.

Simple Modeling and Analysis for Crankshaft Three-Dimensional Vibrations, Part 2: Application to an Operating Engine Crankshaft

1995 ◽  
Vol 117 (1) ◽  
pp. 80-86 ◽  
Author(s):  
T. Morita ◽  
H. Okamura
Keyword(s):  
Stiffness Matrix ◽  
Dynamic Stiffness ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Inertia Force ◽  
Connecting Rod ◽  
Automobile Engine ◽  
Dynamic Stiffness Matrix ◽  
Modeling And Analysis ◽  
Engine Crankshaft

The modeling and analysis procedures with the dynamic stiffness matrix method described in Part 1 were applied to a crankshaft system, consisting of crankshaft, front pulley, flywheel, piston, and connecting rod, under firing conditions. For firing conditions, (7) one half of the reciprocating masses consisting of the piston, piston pin, and connecting rod small end, and (2) rotating masses of the connecting rod big end mass, were attached to the two ends of the crankpin, taking account of the rigidity of the connecting rod. The excitation forces were calculated from the gas force and the inertia force due to the reciprocating masses. By solving the equations of motion derived in the form of the dynamic stiffness matrix, we calculated the three-dimensional steady-state vibrations of the crankshaft system under firing conditions. A crankshaft system for a four-cylinder in-line automobile engine was used for the analysis. We calculated the influence of the mass and moments of inertia of the front pulley on the behavior of the crankshaft vibrations and the excitation induced at the crankjournal bearings. Calculated values were compared with experimental results.

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