Study of Inlet Valve Seat Protrusion Effect on GTDI Engine Flow Box

2022 ◽  
pp. 1041-1053
Author(s):  
Ming-ming Wang ◽  
Yong-gang Zhang ◽  
Dong Liu ◽  
Gui-qiang Zhang
Keyword(s):  
Valve Seat ◽  
Inlet Valve

Solving Inlet Valve Seat Wear Problem in High BMEP Engines

2001 ◽  
Author(s):  
P. A. Lakshminarayanan ◽  
N. Nayak ◽  
Y. Aghav ◽  
A. D. Dani
Keyword(s):  
Valve Seat ◽  
Inlet Valve

Control for the Lift of the Inlet Valve - Electromagnetic Drive Assembly with the Effect of Friction

2013 ◽  
Vol 389 ◽  
pp. 596-601
Author(s):  
Adam Rylski ◽  
Krzysztof Siczek
Keyword(s):  
Control Algorithm ◽  
Tial Alloy ◽  
Valve Lift ◽  
Valve Seat ◽  
Inlet Valve ◽  
Electromagnetic Valve ◽  
Electromagnetic Drive ◽  
Fem Method ◽  
Valve Stem ◽  
Valve Assembly

It has been analyzed the assembly of electromagnetic drive - inlet valve operating in camless valvetrain. The valve made of TiAl alloy has mated with its guide made of phosphor bronze. The scheme of electromagnetic valve drive has been shown in the article. The head aim of the motion control for such valve has been to provide small values of the valve velocity near the valve seat position. The aim of present analysis is to study the course of friction force between valve stem and its guide against time during use of control algorithm presented in the article. Curses of generated electrodynamical force against displacement of coil - valve assembly has been computed using FEM method and presented in the article. The courses of valve lift against time for different conditions have been presented in the article.

Numerical Simulation of Flow in Imported Steam Turbine Inlet Components with Equilibrated Holes in High Performance

2013 ◽  
Vol 712-715 ◽  
pp. 1263-1267
Author(s):  
Shan Tu ◽  
Shu Ming Wu ◽  
Qi Zhou ◽  
Hong Mei Zhang ◽  
Xiao Qing Zhu
Keyword(s):  
Flow Field ◽  
Steam Turbine ◽  
High Performance ◽  
Optimization Design ◽  
Great Influence ◽  
Control Valve ◽  
Stable Operation ◽  
Valve Seat ◽  
Valve Disc ◽  
Interior Flow

The main inlet component of steam turbine is control valve. The stable operation of the steam turbine control valve is vital for safe and stable operation of the steam turbine and safety production of the power plant. However, due to the complexity of the structure and unsteady characteristics of steam flow in the valve, there is not enough experimental method about the detailed flow characteristics of the area near control valve disc and the inside of the valve chamber up to now. This article is to focus on the simulation of the steam turbine control valve interior flow field which includes the valve pre-inlet channel in different conditions, then find the reasons which caused instability and pressure loss of the control valve by analyzing the flow field details, finally further optimization design. The profile matching of the valve disc and valve seat has a great influence on the interior flow field of control valve, so analysis of the high performance valve disc shape and divergence angle of valve seat is carried out, and the research conclusion is used for guide design and development of the control valve.

Stellite alloy mixture hardfacing via laser cladding for control valve seat sealing surfaces

2017 ◽  
Vol 329 ◽  
pp. 97-108 ◽  
Author(s):  
Yinping Ding ◽  
Rong Liu ◽  
Jianhua Yao ◽  
Qunli Zhang ◽  
Liang Wang
Keyword(s):  
Laser Cladding ◽  
Control Valve ◽  
Valve Seat ◽  
Stellite Alloy

The Performance Simulation of One-Way Inlet Valve of Reflux Scavenging Free Piston Engine

2013 ◽  
Vol 694-697 ◽  
pp. 582-587
Author(s):  
Zhen Xin Li ◽  
Zhao Cheng Yuan ◽  
Jia Yi Ma ◽  
Shi Yu Li
Keyword(s):  
Flow Rate ◽  
Spring Constant ◽  
Air Flow Rate ◽  
Inlet Valve ◽  
Free Piston ◽  
Performance Simulation ◽  
Bottom Dead Center ◽  
Free Piston Engine ◽  
Opening And Closing ◽  
Stroke Engine

The performance of one-way inlet valve directly impacts the effect of the reflux scavenging two-stroke engine intake. It’s discovered that the intake air flow rate, the weight of valve and the spring constant have the greatest impact on the opening, closing and the lift change of one-way inlet valve, by simulating the movement of piston and valve using CFD software. The greater the flow rate, the smaller the weight of valve, or the smaller the spring constant, then the faster the opening of valve. Meanwhile, in order to ensure that the valve quickly returns, the bigger of spring constant is the better. The phases of opening and closing of valve lag fall behind the phases of piston getting to bottom dead center (BDC) and top dead center (TDC).

Exhaust Valve Seat Leakage

1997 ◽  
Author(s):  
John Hoard ◽  
Peter Moilanen
Keyword(s):  
Exhaust Valve ◽  
Valve Seat
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