Intake and Exhaust Systems Equipped with a Variable Valve Control Device for Enhancing of Engine Power

2001 ◽  
Author(s):  
Tetsuya Nakayasu ◽  
Hajime Yamada ◽  
Toshikazu Suda ◽  
Noritoshi Iwase ◽  
Kyo Takahashi
Keyword(s):  
Control Device ◽  
Variable Valve ◽  
Valve Control ◽  
Engine Power ◽  
Exhaust Systems

Further development of BMW’s fully-variable valve control system valvetronic

MTZ worldwide ◽  
2005 ◽  
Vol 66 (9) ◽  
pp. 10-13 ◽  
Author(s):  
Klaus Benedikt ◽  
Gottfried Drexler ◽  
Torsten Eder ◽  
Markus Eisenkoelbl ◽  
Christoph Luttermann ◽  
...  
Keyword(s):  
Control System ◽  
Variable Valve ◽  
Further Development ◽  
Valve Control

Application of Active Subspace Method in Gas Exchange Strategy Calibration on a Variable Valve Timing Gasoline Engine

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Cheng Guan ◽  
Qingjun Ma ◽  
Zhen Huang ◽  
Dong Han
Keyword(s):  
Gas Exchange ◽  
Group Size ◽  
Gasoline Engine ◽  
Training Group ◽  
Subspace Method ◽  
Engine Torque ◽  
Ic Engines ◽  
Variable Valve ◽  
Active Subspace ◽  
Engine Power

Abstract Modern internal combustion (IC) engines have complex configurations with many parameters to be tuned, and this system complication usually leads to a large amount of engine calibration experiments. In this study, the active subspace method was used to build predictive models for the gas exchange-related parameters, including volumetric efficiency, intake mass flow and pumping loss, and the power-related parameters, including engine torque and engine power. The results show that the predicted outputs fit well with the experimental data, with satisfactory coefficients of determination and average absolute errors (AAE). Further, the contributions and influence directions of the input parameters to the outputs were provided based on a sensitivity analysis, which is consistent with the existing knowledge, and therefore, verifies the reliability of the predictive model built based on the active subspace method. Finally, the relation between the training group size and the prediction performance was explored. It is shown that a reduction, up to 66%, in the training group size is still able to maintain good predictive performances of the models, indicating the substantial capability of the active subspace method to reduce the experimental efforts.

Development of the Directly Actuated Variable Valve Control System

1999 ◽  
Author(s):  
Takaaki Tsukui ◽  
Koji Tsutsumizaki ◽  
Mutsuo Nakajima
Keyword(s):  
Control System ◽  
Variable Valve ◽  
Valve Control

A Continuous Variable Valve Event and Lift Control Device (VEL) for Automotive Engines

2001 ◽  
Author(s):  
Makoto Nakamura ◽  
Seinosuke Hara ◽  
Yoshihiko Yamada ◽  
Keisuke Takeda ◽  
Naoki Okamoto ◽  
...  
Keyword(s):  
Continuous Variable ◽  
Control Device ◽  
Automotive Engines ◽  
Lift Control ◽  
Variable Valve ◽  
Valve Event

Variable Valve - Control Systems for Spark Ignition Engine

2001 ◽  
Author(s):  
Niculae Negurescu ◽  
Constantin Pana ◽  
Marcel Ginu Popa ◽  
Alexandru Racovitza
Keyword(s):  
Control Systems ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Variable Valve ◽  
Valve Control

Analysis of the Variable Intake Control Technology on the Car

2014 ◽  
Vol 556-562 ◽  
pp. 2523-2527
Author(s):  
Yan Liu
Keyword(s):  
Engine Performance ◽  
Variable Valve Timing ◽  
Control Technology ◽  
Valve Timing ◽  
Timing Control ◽  
Control Technologies ◽  
Boost Control ◽  
Variable Valve ◽  
Valve Control ◽  
Intake Control

In recent years, major car companies research and use a variety of advanced intake control technologies, the most commonly used techniques are the power valve control technology, harmonic boost control technology, variable valve timing control technology. After the actual using, these techniques can really improve the volumetric efficiency of the engine, improve engine performance.

scholarly journals Analysis of variable Inlet Valve Control in two-stage turbocharged marine four-stroke Diesel engines – Miller cycle

Pomorstvo ◽  
2017 ◽  
Vol 31 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Luka Abramović ◽  
Dragan Martinović ◽  
Davor Lenac
Keyword(s):  
Detailed Comparison ◽  
Shipping Industry ◽  
Two Stage ◽  
Inlet Valve ◽  
Air Content ◽  
Variable Valve Actuation ◽  
Diesel Cycle ◽  
Imminent Threat ◽  
Variable Valve ◽  
Valve Control

With the ever so imminent threat of climate change caused by man-made pollution, IMO introduces a new piece of legislature: IMO Annex 6 Tier III regarding air pollution. To meet new standards of exhaust air content, engineers are scrambling to find new and efficient ways to keep the shipping industry going. With the dawn of two-stage turbocharging developing high values of inlet air pressure in combination with early IVC using variable valve actuation depending on the engine load, the regulations are met. In this study the effectiveness of the previously mentioned concepts are put to the test against the conventional Diesel cycle used on board most vessels today. A detailed comparison of the two is conducted followed by a thorough analysis and argumentation.

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