Improvement of Diesel Engine Performance by Variable Valve Train System

2010 ◽  
Vol 11 (5) ◽  
pp. 331-344 ◽  
Author(s):  
T Tomoda ◽  
T Ogawa ◽  
H Ohki ◽  
T Kogo ◽  
K Nakatani ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Valve Train ◽  
Variable Valve Train ◽  
Variable Valve ◽  
Train System

Modeling and Analysis of an Electromagnetic Fully Variable Valve Train with a Magnetorheological Buffer

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 996
Author(s):  
Zhu ◽  
Liu ◽  
Guo ◽  
Xu ◽  
Hou ◽  
...  
Keyword(s):  
Engine Performance ◽  
Coordinated Control ◽  
Valve Train ◽  
Soft Landing ◽  
Modeling And Analysis ◽  
Collaborative Control ◽  
Variable Valve Train ◽  
Electromagnetic Linear Actuator ◽  
Linearized Model ◽  
Variable Valve

Electromagnetic fully variable valve train (EMVT) technology promises to improve the fuel economy and optimize the engine performance. A novel EMVT equipped with a magnetorheological buffer (EMVT with MR buffer) is proposed to suppress the valve seating impact in this paper. The magnetorheological buffer can adjust the damping characteristics of the whole system in the seating process. Valve precise motion control and better seating performance can be achieved through the coordinated control of electromagnetic linear actuator (EMLA) and MR buffer. For better analysis of system performance, establishing an accurate system dynamic model is the basis of the coordinated control system. A high-order nonlinear precise model integrating dynamics, electromagnetism, and fluid mechanic was established. Then, the Jacobi linearization model is carried out at the equilibrium seating point to build a control-oriented linearized model. The correctness and accuracy of the linearized model is verified. Experiments and simulations show that the valve precise motion can be well controlled to achieve fully variable actuation. And the valve soft landing can be completed under collaborative control.

Efficient Application of the Fully Variable Valve Train System UpValve

MTZ worldwide ◽  
2019 ◽  
Vol 80 (9) ◽  
pp. 32-39 ◽  
Author(s):  
Michael Breuer ◽  
Martin Lauterbach ◽  
Stephan Schmitt ◽  
Stefan Moormann
Keyword(s):  
Valve Train ◽  
Variable Valve Train ◽  
Variable Valve ◽  
Train System

Electro-Hydraulic Fully Variable Valve Train System

2010 ◽  
Vol 10 (2) ◽  
pp. 38-43
Author(s):  
Michael Haas ◽  
Martin Rauch
Keyword(s):  
Valve Train ◽  
Variable Valve Train ◽  
Variable Valve ◽  
Train System

scholarly journals Conceptual Design of a Hydraulic Valve Train System

10.14311/248 ◽  
2001 ◽  
Vol 41 (4-5) ◽  
Author(s):  
J. Pohl ◽  
A. Warell ◽  
P. Krus ◽  
J.-O. Palmberg
Keyword(s):  
Integrated Approach ◽  
Valve Train ◽  
Design Parameters ◽  
Combustion Engines ◽  
Variable Valve Train ◽  
Critical Components ◽  
Variable Valve ◽  
Component Models ◽  
Train System

Variable valve train systems have been brought into focus during recent years as a means to decrease fuel consumption in tomorrow's combustion engines. In this paper an integrated approach, called simulation driven experiments, is utilised in order to aid the development of such highly dynamic systems. Through the use of systematic design methodology, a number of feasible concepts are developed. Critical components are subsequently identified using simulation. In this approach, component behaviour is simulated and validated by measurements on prototype components. These models are unified with complete system models of hydraulically actuated valve trains. In the case of the valve trains systems studied here component models could be validated using comparably simple test set-ups. These models enable the determination of non-critical design parameters in an optimal sense. This results in a number of optimised concepts facilitating an impartial functional concept selection.

Electro-hydraulic fully variable valve train system

MTZ worldwide ◽  
2010 ◽  
Vol 71 (3) ◽  
pp. 16-21 ◽  
Author(s):  
Michael Haas ◽  
Martin Rauch
Keyword(s):  
Valve Train ◽  
Variable Valve Train ◽  
Variable Valve ◽  
Train System

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

3- Cylinder SI Engine with fully variable Valve Train – UpValve on Intake and Exhaust Side

2017 ◽  
pp. 27-44
Author(s):  
M. Breuer ◽  
G. Bartsch ◽  
R. Friedfeldt ◽  
U. Heiter ◽  
U. Kramer ◽  
...  
Keyword(s):  
Valve Train ◽  
Si Engine ◽  
Variable Valve Train ◽  
Variable Valve
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