scholarly journals Fully variable, simple and efficient - electrohydraulic - valve train for reciprocating engines

2020 ◽  
Author(s):  
Wolfgang Schneider ◽  
◽  
Keyword(s):  
Valve Train ◽  
Reciprocating Engines ◽  
Electrohydraulic Valve

Functionality and Potential of a New Electrohydraulic Valve Train

MTZ worldwide ◽  
2019 ◽  
Vol 80 (9) ◽  
pp. 18-27 ◽  
Author(s):  
Norbert Zsiga ◽  
Andyn Omanovic ◽  
Patrik Soltic ◽  
Wolfgang Schneider
Keyword(s):  
Valve Train ◽  
Electrohydraulic Valve

A Review of Internal Combustion Engine Losses Part 1: Specific Studies on the Motion of Pistons, Valves and Bearings

1992 ◽  
Vol 206 (4) ◽  
pp. 223-236 ◽  
Author(s):  
E Ciulli
Keyword(s):  
Combustion Engine ◽  
Numerical Approach ◽  
Friction Reduction ◽  
Valve Train ◽  
Reduce Fuel Consumption ◽  
Future Developments ◽  
Reciprocating Engines ◽  
Liner System ◽  
Experimental Works ◽  
Software And Hardware

Energy saving is an important task today. Friction reduction in reciprocating engines is a way to reduce fuel consumption and to improve engine endurance. To find the value of frictional losses of every component is necessary in order to reduce engine losses. The piston-liner system, valve train and bearings are the most important components for mechanical friction losses in reciprocating engines. In this paper both theoretical and experimental works published within the last ten years about the losses related to the motion of pistons, valves and bearings have been reviewed. Some known design improvements to reduce friction in these components are briefly reported and indications for future developments are pointed out, related in particular to the numerical approach, capable of more realistic simulations due to new software and hardware, and to the new experimental and material technologies.

Cylinder Deactivation with Mechanically Fully Variable Valve Train

2012 ◽  
Vol 5 (2) ◽  
pp. 207-215 ◽  
Author(s):  
Rudolf Flierl ◽  
Frederic Lauer ◽  
Michael Breuer ◽  
Wilhelm Hannibal
Keyword(s):  
Valve Train ◽  
Cylinder Deactivation ◽  
Variable Valve Train ◽  
Variable Valve

Variable Valve Train Concept for Compliance with Future Diesel Emission Standards

MTZ worldwide ◽  
2021 ◽  
Vol 82 (2) ◽  
pp. 36-41
Author(s):  
Michael Elicker ◽  
Wolfgang Christgen ◽  
Jahaazeb Kiyanni ◽  
Maximilian Brauer
Keyword(s):  
Valve Train ◽  
Emission Standards ◽  
Variable Valve Train ◽  
Diesel Emission ◽  
Variable Valve

A Study of the Effects of Ceramic Valve Train Parts on Reduction of Engine Friction

1997 ◽  
Author(s):  
Hiromu Izumida ◽  
Takao Nishioka ◽  
Akira Yamakawa ◽  
Masamichi Yamagiwa
Keyword(s):  
Valve Train ◽  
Engine Friction

Dynamic Characteristics and Stability Analysis of Two-Dimensional (2D) Electro-Hydraulic Proportional Directional Valve

2015 ◽  
Author(s):  
S. Li ◽  
J. Ruan ◽  
B. Meng ◽  
W. A. Jia ◽  
H. Y. Xie
Keyword(s):  
Dynamic Characteristics ◽  
Magnetic Force ◽  
Engineering Application ◽  
Proportional Valve ◽  
Acceptable Range ◽  
Hydrostatic Force ◽  
Practical Engineering ◽  
Direct Operation ◽  
Electrohydraulic Valve ◽  
Proportional Directional Valve

A 2D electrohydraulic proportional directional valve is proposed, which integrates both direct and pilot operation of the valve. In this valve, the output magnetic force of the proportional solenoid is converted to rotate the spool through a thrust-torsion coupling and thus the pressure in the valve sensitive chamber is varied. The varied pressure exerted on the areas of the spool end produces a hydrostatic force to move the spool linearly, which will rotate the spool reversely. Theoretical analysis is carried to the proposed valve and the effects of the key geometric parameters on the dynamic characteristics of the 2D valve and stability are investigated. Experiments are also designed to access to the characteristics of the valve working under direct and pilot operation. The 2D electrohydraulic valve can work properly for both direct operation and pilot operation. The hysteresis and frequency response are measured and the results are within the acceptable range in practical engineering application required of the directional proportional valve.

scholarly journals Gaseous Emissions Using Producer Gas as Fuel in Reciprocating Engines

2005 ◽  
Author(s):  
G. Sridhar ◽  
S. Dasappa ◽  
H. V. Sridhar ◽  
P. J. Paul ◽  
N. K. S. Rajan
Keyword(s):  
Producer Gas ◽  
Gaseous Emissions ◽  
Reciprocating Engines
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