Preliminary Results on Optimal Variable Valve Timing and Spark Timing Control via Extremum Seeking

2010 ◽  
Vol 43 (18) ◽  
pp. 377-384 ◽  
Author(s):  
Donghoon Lee ◽  
Li Jiang ◽  
Hakan Yilmaz ◽  
Anna G. Stefanopoulou
Keyword(s):  
Extremum Seeking ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Timing Control ◽  
Preliminary Results ◽  
Spark Timing ◽  
Variable Valve

Development of a Hydraulic Variable Valve Timing Control System with an Optimum Angular Position Locking Mechanism

2012 ◽  
Author(s):  
Takahiro Miura ◽  
Shunichi Aoyama ◽  
Kaoru Onogawa ◽  
Takaya Fujia ◽  
Tetsuro Murata ◽  
...  
Keyword(s):  
Control System ◽  
Angular Position ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Timing Control ◽  
Locking Mechanism ◽  
Variable Valve

Development of the Multi Locking Hydraulic Variable Valve Timing Control System(VTC) for Hybrid Engines

2014 ◽  
Vol 7 (3) ◽  
pp. 1532-1538
Author(s):  
Ken Shiozawa ◽  
Kenji Ariga ◽  
Tetsuro Murata ◽  
Hironori Ito ◽  
Hitoshi Takeuchi ◽  
...  
Keyword(s):  
Control System ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Timing Control ◽  
Hybrid Engines ◽  
Variable Valve

Factors influencing the burn rate characteristics of a spark ignition engine with variable valve timing

2008 ◽  
Vol 222 (11) ◽  
pp. 2147-2158 ◽  
Author(s):  
F Bonatesta ◽  
P J Shayler
Keyword(s):  
Mass Fraction ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Spark Timing ◽  
Piston Speed ◽  
Flame Development ◽  
Variable Valve ◽  
Valve Overlap

The charge burn characteristics of a four-cylinder port-fuel-injected spark ignition engine fitted with a dual independent variable-valve-timing system have been investigated experimentally. The influence of valve timings on the flame development angle and the rapid burn angle is primarily associated with valve overlap values and internal gas recirculation. Conditions examined cover light to medium loads and engine speeds up to 3500r/min. As engine loads and speeds exceeded about 6bar net indicated mean effective pressure and 3000r/min respectively, combustion duration was virtually independent of the valve timing setting. At lower speeds and work output conditions, valve timing influenced burn angles through changes in dilution mass fraction, charge density, and charge temperature. Of these, changes in dilution mass fraction had the greatest influence. Increasing the dilution by increasing the valve overlap produced an increase in both burn angles. The effects of mean piston speed and spark timing have also been examined, and empirical expressions for the flame development and the rapid burn angles are presented.

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.

Sign in / Sign up

Export Citation Format

Share Document