Requirements for a Mechatronic Design of Test-Beds for Cams (original) (raw)
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JOURNAL OF XI'AN UNIVERSITY OF ARCHITECTURE & TECHNOLOGY, 2022
The cam dynamic test rig is a device for demonstrating dynamic cam action and testing the dynamics of industrial cam-follower systems. A four-dwell cam profile is a special type and used in many operations where multi dwells are required in the output motion. This cam profile is first modified for the minimum rubbing velocity between cam and follower. The design simulation of a four-dwell cam dynamic test rig to test dynamic properties is the main objective of this study. The design of the test rig's numerous components as well as system design considerations for a dynamically silent operations are considered for this work. Using Hertz contact stress theory the cam disc thickness is determined. The thickness of the cam disc is verified using simulation techniques with ANSYS software. The stress levels obtained from both are found in well agreement. The system is modelled using CATIA software package
Experimental study of engine cam-followers
. The cam-follower pair is a very complex lubricated contact because its continuous variation of load, speed and radius of curvature. Experimental verification are necessary but very difficult to perform. After a literature review of the existing test rigs for cam-follower simulation, the main aspects of a new versatile apparatus are presented. Several design variations are presented, each one with its advantages and drawbacks. The final project will take into account some of the presented design solutions and the results of dynamic simulations of the rigs currently under elaboration.
Main Parameters of Cam Profile and Effects on Behavior of the Cam Performance
INTERNATIONAL JOURNAL OF ADVANCES ON AUTOMOTIVE AND TECHNOLOGY, 2017
In scope of this study, main parameters of cam profile are determined. Also, their effects on cam performance are examined starting with valve lift, velocity, acceleration curve. In order to be seen clearly cam behavior and obtain to needed smooth curve thanks to less jerk of cam follower, different valve lifts are calculated but more importantly one of the most critical design criteria on cam profile, acceleration jump as undesired influence, is investigated how to reduce & avoid. Primarily, relations related base circle & nose radius of cam profile, maximum lift of cam follower, lift angle of cam follower and acceleration jump are considered in terms of minimum acceleration jump, continuous contact, valve spring force & contact force-stress. Especially, determination of right valve spring stiffness is significant & affects other main parameters so it is plotted graphs of sudden acceleration change and described how it should be analyzed by analytical & using Matlab. .
Design Optimisation of Cam Shaft Angle Monitoring System For Industrial Improvements
Camshaft is used in the engine for transfers’ motion to inlet & exhaust valve. If transfer of motion is not proper then the strokes of the engine will not done in proper way. It also effects on performance of engine. This research deals with the optimization of drive camshaft using the substitution of composite material over the conventional steel material for drive shaft has increasing the advantages of design due to its high specific stiffness and strength. Drive shaft is the main component of drive system of an automobile electronics. Use of conventional steel for manufacturing of drive shaft has many disadvantages such as low specific stiffness and strength. Conventional drive shaft is made up into two parts to increase its fundamental natural bending frequency. As its simplest a camshaft inspection system can consist of a Roll scan, camshaft sensor, sensor arm and manually rotatable stand for the camshaft. The camshaft, which controls when the inlet and exhaust valves open and close, plays a significant role in this process. To Measure the angle of cam shaft with 0.5mm precision level and also control product quality
World Latest Automobile Research For CAMSHAFT Angle Monitoring System
Camshaft is used in the engine for transfers’ motion to inlet & exhaust valve. If transfer of motion is not proper then the strokes of the engine will not done in proper way. It also effects on performance of engine. This research deals with the optimization of drive camshaft using the substitution of composite material over the conventional steel material for drive shaft has increasing the advantages of design due to its high specific stiffness and strength. Drive shaft is the main component of drive system of an automobile electronics. Use of conventional steel for manufacturing of drive shaft has many disadvantages such as low specific stiffness and strength. Conventional drive shaft is made up into two parts to increase its fundamental natural bending frequency. As its simplest a camshaft inspection system can consist of a Roll scan, camshaft sensor, sensor arm and manually rotatable stand for the camshaft. The camshaft, which controls when the inlet and exhaust valves open and close, plays a significant role in this process. To Measure the angle of cam shaft with 0.5mm precision level and also control product quality. Keywords: - Cam shaft, LVDT Sensor, Servo Motor, Electro Mechanical Valve, Drive Shaft
EXPERIMENTAL ANALYSIS OF CAM ROLLER OF INTERNAL COMBUSTION ENGINE BY CHANGE IN AREA OF CONTACT
Most of the IC engines used in the market have roller cam and follower mechanisms, having a line contact between the cam and the roller follower. In a effort to improve the mechanical efficiency of the mechanism the company requires us to change the line contact to a point contact. Hence it is required to change the flat roller follower to a curved profile. The existing cam & follower mechanisms used in Internal Combustion engines have a line contact between them causing frictional losses. These frictional losses in present line contact are being considered on the higher side. These frictional losses affect the total efficiency of an Internal Combustion engine. The mechanical efficiency of cam & follower mechanism is to be increase by minimising the frictional losses.The roller of rocker arm of a Hero Honda passion bike is replaced by new one to check performance experimentally.
The mechatronics laboratory at Politecnico di Torino
Mechatronics, 1997
The scientific activity of the Mechatronics Laboratory (LIM) founded in 1993 at the Politecnico di Torino is described. LIM is an interdepartmental structure founded by the Departments of Control and Computer Sciences, Electronics and Mechanics and the Mechanics Workshop. LIM's mission is the establishment of common ground where researchers and postgraduate students working in the mechatronics field can perform theoretical and experimental research and exchange experiences in a true interdisciplinary environment. LIM's activity is basically organized in terms of projects concerning preliminary investigation of advanced and integrated technologies and, successively, their transfer to industrial products. LIM actively cooperates with other technological and scientific institutions and with the local system of small and medium enterprises..~') 1997
The issues of designing of construction features of the internal combustion cam engine
Combustion Engines, 2017
On the pages of the article described cam-piston mechanism developed as an alternative to piston crank mechanism. The main feature of this mechanism is that the piston is dwell in the TDC by the 30°CA and thus allows combustion of the fuel in constant volume. Authors presented the process of designing an analytical cam. The starting point for the calculation was the displacement of piston graph and the limits of acceleration and velocity values obtained. The results of strength calculations of the cam with regard to fatigue problems are also presented. Calculations were carried out in order to reduce the weight of the cam. For this purpose, the Finite Element Method was used.
Development of a Mechatronic System for Demonstration Purposes
Műszaki Tudományos Közlemények, 2021
The aim of the paper is to present a modular system, with the help of which it is possible to reveal the structure and analysis of a mechatronic system, taking into account several disciplines that contribute to the structure of the system. The planned system will include devices from different disciplines, the operation and coordination of which will be observable. The designed system is a two-degree-of-freedom mechanism with a translational and a rotary joint. The movement of the joints are obtained by different types of energy converters (pneumatic, electric). The replacement of the different types of drives can be performed quickly and easily without drastically changing the system setup. The simulations are implemented using the MATLAB Simscape software package.
Investigation on cam-follower lubricated contacts
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2011
The Investigation on cam–follower contact is one of the most complex lubricated non-conformal contact due to its continuous variation of load, speed, and geometry. The complexity of the phenomena occurring in the camshaft systems makes experimental verifications very important. In this study, an already existing versatile experimental apparatus for the investigation of non-conformal lubricated contacts, able to measure film thickness using the optical interference method and friction force trough a load cell, has been modified in order to test cam–follower contacts. Some tests have been carried out for investigating the behaviour of some fundamental components of the rig. A theoretical/numerical simulation has been performed to investigate the dynamic behaviour of the system and in order to provide some indications for the interpretation of the experimental results. Purposely developed versions of the programme have been also an important support for the design of a new apparatus sp...