Operating Fluids and Materials are Key Technologies for Efficient Combustion Engines

MTZ worldwide ◽  
2018 ◽  
Vol 79 (12) ◽  
pp. 80-85
Author(s):  
Thomas Schneider ◽  
Mathias Heerwagen
Keyword(s):  
Combustion Engines ◽  
Key Technologies ◽  
Efficient Combustion

Analysis of power split vibration absorber performance in heavy-duty truck powertrains

2020 ◽  
Vol 234 (10-11) ◽  
pp. 2509-2521 ◽  
Author(s):  
Lina Wramner
Keyword(s):  
New Technology ◽  
Installation Space ◽  
Design Parameters ◽  
Vibration Absorber ◽  
Combustion Engines ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Power Split ◽  
Speed Range ◽  
Efficient Combustion

The current development of more efficient combustion engines leads to an increase in engine torsional vibrations; therefore, new technology is needed for reducing the vibrations transmitted from the engine to the driveline. In this article, the concept of power split vibration absorber is evaluated. A mathematical model of the power split vibration absorber is presented, and an analytical study shows how different design parameters affect the power split vibration absorber performance. Numerical simulations with models representing typical heavy-duty truck powertrains are used in the evaluations. It is concluded that for a low level of damping, the power split vibration absorber can provide significantly lower vibration amplitudes than a corresponding dual mass flywheel within a limited speed range. If the power split vibration absorber is optimised for the critical low engine speeds, an overall decrease in the level of vibration can be obtained, but a larger installation space than with a conventional dual mass flywheel would probably be required.

Electrical and Optical Characterization Methodologies for Advanced Spark Ignition

2022 ◽  
pp. 1-35
Author(s):  
Linyan Wang ◽  
Guangyun Chen ◽  
Jimi Tjong ◽  
Ming Zheng
Keyword(s):  
Spark Ignition ◽  
Combustion Engines ◽  
Flow Conditions ◽  
Current Management ◽  
Task Control ◽  
Density Flow ◽  
Efficient Combustion ◽  
Spark Plasma ◽  
Aviation Engines ◽  
A Current

Abstract Due to the high transiency and high voltage characteristics of spark ignition, precise measurements are in demand for efficient ignition in future clean combustion engines. The practical challenges of SI systems arise as the gaseous substances vary extensively in density, flow, and temperature. In this paper, a typical transistor coil ignition system with a current management module maintains the transient discharge condition for more credible measurements. Suitable apparatus with FPGA multi-task control systems are established to effectively control and stabilize the discharge current level and duration. The electrical waveforms and spark plasma patterns are correlated, via concurrent electric probing and shadowgraph imaging, under quiescent and flow conditions. The multi-task FPGA provides synchronization of ignition control and data acquisition. The empirical setup and analyzing methods of this work provide essential guidance for facilitating broader innovations in spark ignition, and for advancing the clean and efficient combustion in automotive and aviation engines.

Development Strategy of Gas Engines in China

2012 ◽  
Vol 516-517 ◽  
pp. 593-597
Author(s):  
Li Yan Feng ◽  
Jun Zhai ◽  
Chuang Qu
Keyword(s):  
Development Strategy ◽  
Internal Combustion Engines ◽  
Ghg Emissions ◽  
Combustion Engines ◽  
Fuel System ◽  
Combustion System ◽  
Green House Gas ◽  
Harmful Emissions ◽  
Key Technologies ◽  
Gas Fuel

Based on the analysis of the gas fuel resources, the development potential of gas engines in China is evaluated. And contribution of application of gas engines on the reduction of Green House Gas (GHG) emissions as well as harmful emissions is estimated. Since gas engines are different from conventional internal combustion engines on fuel system and combustion system, the key technologies relating to developing gas engines are introduced, and the major difficulties of popularizing of gas engines are discussed. With the foundation of the analysis, development strategy of gas engines is proposed.

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