Variable valve actuation and control.
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Variable valve actuation and control.

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Published by Society of Automotive Engineers in Warrendale, PA .
Written in English


  • Internal combustion engines -- Valves -- Design and construction -- Congresses.

Book details:

Edition Notes

ContributionsSociety of Automotive Engineers., SAE International Congress & Exposition (1993 : Detroit, Mich.)
LC ClassificationsTL214.V3 V37 1993
The Physical Object
Pagination93 p. :
Number of Pages93
ID Numbers
Open LibraryOL1748087M
ISBN 10156091341X
LC Control Number92063154

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Variable Control of the Valves via the Camshaft. The actuation system of the valves, allowing for continuous change of valve lifts and valve timing, is known as the fully variable valve control/actuation (FVVA) system. Among the many mechanical systems offering FVVA is the Valvetronic system developed by BMW. FIGURE I.2 Toyota Valvematic variable valve lift systems illustrating low and high lift configurations resulting from adjusting the angle between the intermediate roller follower and additional follower to obtain the desired valve lift. SOURCE: Boutell (). Courtesy of Toyota Motor Engineering & Manufacturing North America, Inc. At part load conditions, the solenoid . Also it was presented the effect of Valve Timing on Effective Compression Ratio, In-cylinder turbulence, the exhaust temperature, the over-expansion and turbo charging. It was presented different Two- and Three-Step Strategy of Variable Valve Actuation and also strategies for full variable valve timing control. Variable valve actuation, for both intake and exhaust valve events, is a potent tool for controlling the parameters that are critical to HCCI-like combustion and expanding its operational range. Additionally, VVA can be used to optimize the combustion process as well as exhaust temperatures and impact the after treatment system requirements and Cited by: 7.

Get this from a library! Variable valve actuation [Society of Automotive Engineers.;] -- Collection of papers from three technical sessions on variable valve actuation held at the SAE World Congress, March in Detroit, Michigan. Papers . Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, and continuous, which is . @article{osti_, title = {A computer-controlled poppet-valve actuation system for application on research engines}, author = {Richman, R.M. and Reynolds, W.C.}, abstractNote = {A computer-controlled valve actuation system for research engines is described. The system can be used for the complete real-time control of valve motion, including valve lift, dwell, valve . The basic control logic of such systems is then discussed followed by a list of some unique attributes and advantages of the same. Few experimental results from the literature have also been cited to substantiate the utility of variable valve actuation by: 2.

control valve and instrumentation terminology. Chapter 2 develops the vital topic of control valve performance. Chapter 3 covers valve and actuator types. Chapter 4 describes digital valve controllers, analog positioners, boosters, and other control valve accessories. Chapter 5 is a comprehensive guide to selecting the best control valve for an. Request PDF | A novel linear actuator for variable valve actuation | This paper describes design considerations for a short-stroke high-dynamic linear actuator to be used as valve actuator in. Papers in this book cover devices ranging from cam phasers to fully flexible VVA mechanism to electromagnetic actuators. Titles include Power Stage Partitioning for E-VALVE Applications; A Continuous Variable Valve Event and Lift Control Device (VEL) for Automotive Engines; VarioCam Plus-A Highlight of the Porsche Turbo Engine; and more. The camless valve trains are considered to improve the performance of internal combustion engines in recent research [1,2].The camless variable valve train (VVT) systems eliminate the camshafts and the valves can be driven by electromagnetic actuations [3,4], electrohydraulic actuations [5,6], or electro-pneumatic actuations [].The electromagnetic VVT (EMVT) is Author: Xiangbin Zhu, Liang Liu, He Guo, Zhaoping Xu, Wenguo Hou, Lu Niu.