Development of New 1.6Liter Four Cylinder Turbocharged Direct Injection Gasoline Engine with Intake and Exhaust Valve Timing Control System

2011 ◽  
Author(s):  
Masayuki Shimizu ◽  
Kazunori Yageta ◽  
Yoshinori Matsui ◽  
Takahiro Yoshida
Keyword(s):  
Control System ◽  
Gasoline Engine ◽  
Direct Injection ◽  
Exhaust Valve ◽  
Valve Timing ◽  
Timing Control ◽  
Direct Injection Gasoline Engine

Intake and Exhaust Valve Timing Control on a Heavy-Duty, Direct-Injection Natural Gas Engine

2015 ◽  
Author(s):  
Bronson Patychuk ◽  
Ning Wu ◽  
Gordon McTaggart-Cowan ◽  
Philip Hill ◽  
Sandeep Munshi
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Exhaust Valve ◽  
Valve Timing ◽  
Heavy Duty ◽  
Timing Control ◽  
Gas Engine ◽  
Natural Gas Engine

scholarly journals Analysis of scavenge port designs and exhaust valve profiles on the in-cylinder flow and scavenging performance in a two-stroke boosted uniflow scavenged direct injection gasoline engine

2017 ◽  
Vol 19 (5) ◽  
pp. 509-527 ◽  
Author(s):  
Xinyan Wang ◽  
Jun Ma ◽  
Hua Zhao
Keyword(s):  
Gasoline Engine ◽  
Direct Injection ◽  
Orientation Angle ◽  
Exhaust Valve ◽  
Direct Injection Gasoline Engine ◽  
Valve Opening ◽  
The Difference ◽  
Cylinder Flow ◽  
Exhaust Valves ◽  
Scavenging Efficiency

In this study, effects of intake scavenge port designs and exhaust valve opening profiles were studied on the scavenging process in a newly proposed two-stroke boosted uniflow scavenged direct injection gasoline engine by detailed three-dimensional engine simulations. As the most important geometric parameters, the axis inclination angle and swirl orientation angle of scavenge ports, as shown in Figure 1, were investigated and optimized for best scavenging performances at first. With the optimal axis inclination angle of 90° and swirl orientation angle of 20°, various combinations of scavenge port opening timing, exhaust valve opening duration and exhaust valve opening timing were then analysed. Four distinct scavenging periods, that is, early backflow period, backflow scavenging period, main scavenging period and post backflow period, were identified and their impacts on the in-cylinder flow motions and scavenging performances were investigated. The results show that the optimal scavenging performance can be achieved with a higher delivery ratio, charging efficiency and scavenging efficiency when the post backflow is just avoided by tuning the difference between the closing timings of scavenge ports and exhaust valves (Δ close) and the overlap between the opening profiles of scavenge ports and exhaust valves (Δ overlap) for a specific exhaust valve opening duration. A longer exhaust valve opening duration can be used to further improve the scavenging performances. In addition, the difference between the opening timings of scavenge ports and exhaust valves (Δ open) can be increased to improve scavenging efficiency. The Δ close also shows strong positive correlation with in-cylinder swirl ratio and negative correlation with tumble ratio. The results presented in this study provide the fundamental knowledge of the scavenging process in the uniflow scavenged two-stroke engine and assist the design of scavenge ports and valve strategies to optimize in-cylinder flow motion and scavenge performances in the two-stroke boosted uniflow scavenged direct injection gasoline engine with a variable valve actuation system for exhaust valves.

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

Experimental and numerical analyses of the combustion process in a direct injection gasoline engine

2000 ◽  
Vol 1 (2) ◽  
pp. 147-161 ◽  
Author(s):  
J Reissing ◽  
H Peters ◽  
J. M. Kech ◽  
U Spicher
Keyword(s):  
Numerical Investigation ◽  
Gasoline Engine ◽  
Numerical Models ◽  
Direct Injection ◽  
Combustion Process ◽  
Experimental Methods ◽  
Spark Ignition Engine ◽  
Gasoline Direct Injection ◽  
Direct Injection Gasoline Engine ◽  
Gdi Engines

Gasoline direct injection (GDI) spark ignition engine technology is advancing at a rapid rate. The development and optimization of GDI engines requires new experimental methods and numerical models to analyse the in-cylinder processes. Therefore the objective of this paper is to present numerical and experimental methods to analyse the combustion process in GDI engines. The numerical investigation of a four-stroke three-valve GDI engine was performed with the code KIVA-3V [1]. For the calculation of the turbulent combustion a model for partially premixed combustion, developed and implemented by Kech [4], was used. The results of the numerical investigation are compared to experimental results, obtained using an optical fibre technique in combination with spectroscopic temperature measurements under different engine conditions. This comparison shows good agreement in temporal progression of pressure. Both the numerical simulation and the experimental investigation predicted comparable combustion phenomena.

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