scholarly journals Increasing the Performance of Existing IC Engines by Free Valve Actuation Technology

2020 ◽  
pp. 43-49
Author(s):  
Ajay Kumar. K. V ◽  
Hari Prasad. J ◽  
Likith. R. S ◽  
Mahesh. K. R ◽  
Lakshminarasimha. N
Keyword(s):  
Valve Mechanism ◽  
Current Generation ◽  
Pneumatic Actuators ◽  
Gasoline Engines ◽  
Ic Engines ◽  
Enhance Efficiency ◽  
And Control ◽  
Poppet Valves ◽  
Moving Parts ◽  
Valve Actuation

In this current generation, the efficiency of gasoline engines is around 50%. This isbecause of many losses within the system. The most important losses are because of moving parts. Moving parts comprises piston, cams, rod etc. Investigations are being conducted to cut the losses to enhance efficiency. One such outcome is that the free Valve Mechanism which uses poppet valves operated by means of pneumatic actuators rather than cams. Actuators are used to open and shut the valves and control combustion within each cylinder and hence improving the efficiency.

scholarly journals Modeling and control of a new robotic deburring system

Robotica ◽  
2005 ◽  
Vol 24 (2) ◽  
pp. 229-237 ◽  
Author(s):  
Jae H. Chung ◽  
Changhoon Kim
Keyword(s):  
Comparative Study ◽  
Decentralized Control ◽  
Control Method ◽  
Robotic Manipulator ◽  
Coordination Control ◽  
Pneumatic Actuators ◽  
Modeling And Control ◽  
Control Approach ◽  
Simulation Results ◽  
And Control

This paper discusses the modeling and control of a robotic manipulator with a new deburring tool, which integrates two pneumatic actuators to take advantage of a double cutting action. A coordination control method is developed by decomposing the robotic deburring system into two subsystems; the arm and the deburring tool. A decentralized control approach is pursued, in which suitable controllers were designed for the two subsystems in the coordination scheme. In simulation, three different tool configurations are considered: rigid, single pneumatic and integrated pneumatic tools. A comparative study is performed to investigate the deburring performance of the deburring arm with the different tools. Simulation results show that the developed robotic deburring system significantly improves the accuracy of the deburring operation.

scholarly journals Heterogenic Autotuner for Electro-Pneumatic Single-Action Actuators

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4604
Author(s):  
Michał Bartyś
Keyword(s):  
Pid Controller ◽  
The Novel ◽  
Main Concept ◽  
Heuristic Knowledge ◽  
Pneumatic Actuators ◽  
Single Action ◽  
Long Time ◽  
Qualitative Knowledge ◽  
Tuning Process ◽  
And Control

The main concept is to design the novel autotuner in a way that it will introduce benefits that arise from the effect of the fusion of the quantitative and qualitative knowledge gained from identification experiments, long-time expertise, and theoretical findings. The novelty of this approach is in the manner in which the expert heuristic knowledge is used for the development of an easy-to-use and time-efficient tuning process. In the proposed approach, the positioner simply learns, mimics, and follows up the tuning process that is performed by an experienced human operator. The major strength of this approach is that all parameters of positioner PID controller can be estimated by only identifying one single parameter that is the effective time constant of the pneumatic actuator. The elaborated autotuning algorithm is experimentally examined with different commercially available pneumatic actuators and control valves. The obtained results demonstrate that the proposed autotuning approach exhibits good performance, usability, and robustness. This should be considered as particularly relevant in the processes of installing, commissioning, and servicing single-action final control elements.

Aspects Regarding Pneumatic System Simulated Control

2010 ◽  
Vol 166-167 ◽  
pp. 291-296 ◽  
Author(s):  
Rares Ciprian Mîndru ◽  
Vistrian Maties ◽  
Ciprian Lapusan ◽  
Ioan Adrian Cosma
Keyword(s):  
Differential Equations ◽  
High Speed ◽  
Integrated Design ◽  
Control Algorithms ◽  
Pneumatic Actuators ◽  
Positioning Systems ◽  
Electromagnetic Valve ◽  
Modeling Simulation ◽  
Mathematical Analyses ◽  
And Control

The paper proposes a large approach to pneumatic systems starting from the mathematical laws, written in the form of differential equations, which govern the operation of pneumatic systems and continuing with the simulation model. The concept of integrated design includes all approaches, needed for an optimal and deep system understanding, such as modeling, simulation and control. Pneumatic actuators have a nonlinear functionality because of air compressibility, the existing frictions and the valves nonlinearities. Because of these, they are used in high speed applications and simple positioning systems. Thus, the mathematical analyses of pneumatic systems have received a special attention. The differential equations were implemented in Matlab Simulink, and the model input represents the voltage on the electromagnetic valve, and the output seen on the "scope" represents the movement of the piston pneumatic axis. Some control algorithms are implemented and applied to the model and seen the basic differences.

Comment on “Dynamic and Control of Fluidized Catalytic Crackers. 1. Modeling of the Current Generation of FCC’s”

2009 ◽  
Vol 48 (15) ◽  
pp. 7453-7453
Author(s):  
Amin Bashi ◽  
Jafar Sadeghi ◽  
Abdolreza Samimi ◽  
Mohammad Khorram
Keyword(s):  
Current Generation ◽  
And Control

Variation and Control of Small Gasoline Engine Emissions Performance in the Plateau Region

2013 ◽  
Vol 726-731 ◽  
pp. 2022-2025
Author(s):  
Chong Shang Li ◽  
Sheng Ji Liu ◽  
Jian Wang
Keyword(s):  
Gasoline Engine ◽  
Quantitative Relationship ◽  
Mixing Ratio ◽  
Engine Emissions ◽  
Plateau Region ◽  
Gasoline Engines ◽  
Emission Regulations ◽  
Air Intake ◽  
Specific Emissions ◽  
And Control

When small gasoline engines using carburettor are operated in the plateau region, the air intake and fuel supply have different decrease with the altitude increase, and the mixture thicken and the emissions increase. Take outboard marine gasoline engine F15 as an example, the quantitative relationship comparing engines operated on the plateau region to on the plain in same mixing ratio are shown, which includes the power, specific fuel consumption, and CO, HC, NOx specific emissions. And fuel system correction methods are come out to meet EPA emission regulations in different altitudes.

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