Direct Injection System for a Two Stroke Engine
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Ibron E-Spik Ex
A numerical study of mixing phenomena and reaction front propagation in partially premixed combustion engines Ibron, Christian 2019 Document Version: Publisher's PDF, also known as Version of record Link to publication Citation for published version (APA): Ibron, C. (2019). A numerical study of mixing phenomena and reaction front propagation in partially premixed combustion engines. Department of Energy Sciences, Lund University. Total number of authors: 1 Creative Commons License: Unspecified General rights Unless other specific re-use rights are stated the following general rights apply: Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Read more about Creative commons licenses: https://creativecommons.org/licenses/ Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. LUND UNIVERSITY PO Box 117 221 00 Lund +46 46-222 00 00 CHRISTIAN IBRON CHRISTIAN A numerical study mixing -
Modernizing the Opposed-Piston, Two-Stroke Engine For
Modernizing the Opposed-Piston, Two-Stroke Engine 2013-26-0114 for Clean, Efficient Transportation Published on 9th -12 th January 2013, SIAT, India Dr. Gerhard Regner, Laurence Fromm, David Johnson, John Kosz ewnik, Eric Dion, Fabien Redon Achates Power, Inc. Copyright © 2013 SAE International and Copyright@ 2013 SIAT, India ABSTRACT Opposed-piston (OP) engines were once widely used in Over the last eight years, Achates Power has perfected the OP ground and aviation applications and continue to be used engine architecture, demonstrating substantial breakthroughs today on ships. Offering both fuel efficiency and cost benefits in combustion and thermal efficiency after more than 3,300 over conventional, four-stroke engines, the OP architecture hours of dynamometer testing. While these breakthroughs also features size and weight advantages. Despite these will initially benefit the commercial and passenger vehicle advantages, however, historical OP engines have struggled markets—the focus of the company’s current development with emissions and oil consumption. Using modern efforts—the Achates Power OP engine is also a good fit for technology, science and engineering, Achates Power has other applications due to its high thermal efficiency, high overcome these challenges. The result: an opposed-piston, specific power and low heat rejection. two-stroke diesel engine design that provides a step-function improvement in brake thermal efficiency compared to conventional engines while meeting the most stringent, DESIGN ATTRIBUTES mandated emissions -
2-Stroke Scavenging in Conventional and Minimally-Modified 4-Stroke
inventions Article 2-Stroke Scavenging in Conventional and Minimally-Modified 4-Stroke Engines for Heavy Duty Applications at Low to Medium Speeds Dirk Rueter Institute of Measurement and Sensor Technology, University of Applied Sciences Ruhr-West, D-45479 Muelheim an der Ruhr, Germany; [email protected] Received: 14 June 2019; Accepted: 7 August 2019; Published: 9 August 2019 Abstract: The transformation of a standard 4-stroke cylinder head into a torque-improved and gradually more efficient 2-stroke design is discussed. The concept with an effective loop scavenging via an extended inlet valve holds promise for engines at low- to medium-rotational speeds for typical designs of conventional 4-stroke cylinder heads. Calculations, flow simulations, and visualizations of experimental flows in relevant geometries and time scales indicate feasibility, followed by a small engine demonstration. Based on presumably long-forgotten and outdated patents, and the central topic of this contribution, an additional jockey rides on the inlet valve’s disk (facing away from the combustion chamber) and reshapes the in-cylinder flow into a reverted tumble. A quick gas exchange with a well-suppressed shortcut into the open exhaust is approached. For overall mechanical efficiency, the required charge pressure for scavenging is of paramount importance due to the short scavenging time and the intake’s reduced cross-section. Herein, still acceptable charging pressures are reported for scavenging periods equivalent to low or medium rotational speeds, as characteristic for heavy-duty applications. Using widely available components (charger, direct injection, variable camshaft angles) an increased engine efficiency is suggested due to the 2-stroke’s downsizing effect (relatively less internal friction as well as the promise of more torque and a decreased size). -
DEPARTMENT of TRANSPORTATION National
DEPARTMENT OF TRANSPORTATION National Highway Traffic Safety Administration 49 CFR Parts 531 and 533 [Docket No. NHTSA-2008-0069] Passenger Car Average Fuel Economy Standards--Model Years 2008-2020 and Light Truck Average Fuel Economy Standards--Model Years 2008-2020; Request for Product Plan Information AGENCY: National Highway Traffic Safety Administration (NHTSA), Department of Transportation (DOT). ACTION: Request for Comments SUMMARY: The purpose of this request for comments is to acquire new and updated information regarding vehicle manufacturers’ future product plans to assist the agency in analyzing the proposed passenger car and light truck corporate average fuel economy (CAFE) standards as required by the Energy Policy and Conservation Act, as amended by the Energy Independence and Security Act (EISA) of 2007, P.L. 110-140. This proposal is discussed in a companion notice published today. DATES: Comments must be received on or before [insert date 60 days after publication in the Federal Register]. ADDRESSES: You may submit comments [identified by Docket No. NHTSA-2008- 0069] by any of the following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the online instructions for submitting comments. 1 • Mail: Docket Management Facility: U.S. Department of Transportation, 1200 New Jersey Avenue, SE, West Building Ground Floor, Room W12- 140, Washington, DC 20590. • Hand Delivery or Courier: West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE, between 9 am and 5 pm ET, Monday through Friday, except Federal holidays. Telephone: 1-800-647-5527. • Fax: 202-493-2251 Instructions: All submissions must include the agency name and docket number for this proposed collection of information. -
Jennings: Two-Stroke Tuner's Handbook
Two-Stroke TUNER’S HANDBOOK By Gordon Jennings Illustrations by the author Copyright © 1973 by Gordon Jennings Compiled for reprint © 2007 by Ken i PREFACE Many years have passed since Gordon Jennings first published this manual. Its 2007 and although there have been huge technological changes the basics are still the basics. There is a huge interest in vintage snowmobiles and their “simple” two stroke power plants of yesteryear. There is a wealth of knowledge contained in this manual. Let’s journey back to 1973 and read the book that was the two stroke bible of that era. Decades have passed since I hung around with John and Jim. John and I worked for the same corporation and I found a 500 triple Kawasaki for him at a reasonable price. He converted it into a drag bike, modified the engine completely and added mikuni carbs and tuned pipes. John borrowed Jim’s copy of the ‘Two Stoke Tuner’s Handbook” and used it and tips from “Fast by Gast” to create one fast bike. John kept his 500 until he retired and moved to the coast in 2005. The whereabouts of Wild Jim, his 750 Kawasaki drag bike and the only copy of ‘Two Stoke Tuner’s Handbook” that I have ever seen is a complete mystery. I recently acquired a 1980 Polaris TXL and am digging into the inner workings of the engine. I wanted a copy of this manual but wasn’t willing to wait for a copy to show up on EBay. Happily, a search of the internet finally hit on a Word version of the manual. -