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Technical Paper

Experimental Acoustic Analysis of a Motorcycle Dissipative Muffler in Presence of Mean Flow

2016-11-08
2016-32-0039
In recent years, the motorcycle muffler design is moving to dissipative silencer architectures. Due to the increased of restrictions on noise emissions, both dissipative and coupled reactive-dissipative mufflers have substituted the most widely used reactive silencers. This led to higher noise efficiency of the muffler and size reduction. A dissipative muffler is composed by a perforated pipe that crosses a cavity volume filled by a fibrous porous material. The acoustic performance of this kind of muffler are strictly dependent on the porosity of the perforated pipe and the flow resistivity characteristic of the porous material. However, while the acoustic performance of a reactive muffler is almost independent from the presence of a mean flow for typical Mach numbers of exhaust gases, in a dissipative muffler the acoustic behaviour is strictly linked to the mass flow rate intensity.
Technical Paper

Improving Fuel Economy of Thermostatic Control for a Series Plugin-Hybrid Electric Vehicle Using Driver Prediction

2016-04-05
2016-01-1248
This study investigates using driver prediction to anticipate energy usage over a 160-meter look-ahead distance for a series, plug-in, hybrid-electric vehicle to improve conventional thermostatic powertrain control. Driver prediction algorithms utilize a hidden Markov model to predict route and a regression tree to predict speed over the route. Anticipated energy consumption is calculated by integrating force vectors over the look-ahead distance using the predicted incline slope and vehicle speed. Thermostatic powertrain control is improved by supplementing energy produced by the series generator with regenerative braking during events where anticipated energy consumption is negative, typically associated with declines or decelerations.
Magazine

Automotive Engineering: April 2022

2022-04-01
Airing on the side of innovation Lucid Motors' home-grown innovations are leading the pace in electrification. Top engineers tell how and why they're building a benchmark with the new Air EV. Keeping combustion in the conversation The world needs ICEs to stick around - here's how. Engineering a 'Maverick' hybrid transmission Ford Powertrain engineers marry their new in-house electric machine with the proven HF45 transmission - under aggressive vehicle program timing. Driving electrified powertrain systems design Drive System Design punches beyond its weight class in meeting customer needs for electrified powertrain systems engineering services. DSD's North American chief Jon Brentnall explains.
Magazine

Automotive Engineering: November/December 2020

2020-11-26
Volkswagen reveals its 'people's' EV VW's ID.4 leads the 2021 stampede to electrification for the mass market. Answering the fuel-cell compressor question The optimum compressor device for a fuel cell depends on vehicle application - and a lot more. An Eaton expert explains. Tire pressure's impact on EV driving range A new study shows that tighter control of tire-pressure loss can lead to marked improvement in electric-vehicle efficiency. Editorial Warm socks for the EV options list Supplier Eye For suppliers, a new drumbeat New SAE wireless charging standard is EV game-changer Tula DMD aims for more-efficient e-machines Multiphysics helps transform modeling, simulation Is the camshaft being timed out? New Magna seat puts connectivity in the second row BMW reveals its first "M" performance-badged two-wheeler Volkswagen readies new-generation Golf R Q&A Discussing safety tech, standards and industry trends with Hyundai North America's Brian Latouf
Magazine

Automotive Engineering: July/August 2020

2020-07-30
2021 Mustang Mach-E Ford's first dedicated electric platform reveals the challenges and opportunities in developing a state-of-the-art EV. E-Motorcycle project pushes battery boundaries For Triumph's TE-1 project, new materials and cell technologies target greater energy density and overall performance. Williams Advanced Engineering's CEO explains. Tracking the battery-market battleground Production scale, yield and new cell technologies are challenging EV battery-cell suppliers, explains an expert at IHS Markit.
Magazine

Automotive Engineering: June 2021

2021-06-03
Teardown Titan Munro & Associates is leading competitive analysis into the EV age - and spreading the gospel with a global YouTube fan base. Lightweight steel on a (cold) roll A newly developed high-strength steel for cold stamping aims to beat aluminum for EV battery enclosures and other vehicle applications. How EVs and their electronics stick together New adhesives play an increasingly vital role in vehicle structures, battery packs, and in protecting sensitive electronic components from extreme thermal cycling and contaminants. Editorial Farewell and thanks, Mr.
Magazine

Automotive Engineering: April 2021

2021-04-01
Optimizing hybrids for cost and fficiency AVL engineers detail a modular engine program suitable for all forms of hybridization. ICE: Once more, with feeling BorgWarner CSO sees at least one more generation of the ICE before its 'sunset.' Actuating hybrid and EV efficiency More sophisticated driveline-disconnect systems are part of the electrified-vehicle future, says the head of controls at Stoneridge. The world's piston maker charts the ICE future According to Mahle's research VP, the remaining development path for internal combustion is clean, electrified and ready for alternative fuels. Pumping EV heat Heat-pump technology is a game-changer for the widespread adoption of electric vehicles, says a service-tech training expert and EV owner.
Magazine

Automotive Engineering: January/February 2021

2021-01-28
Gearing EVs for greater efficiency Ingear, an innovative 2-speed transmission born in Canada, aims to unlock electric-vehicle performance and efficiency. Built-in Google vehicle apps arrive Android Automotive OS opens the door, cautiously, for third-party developers. Riding on air: Activated carbon aims at autos An old piece of science is set to bring new applications across the mobility spectrum. Allison builds a testing powerhouse Allison Transmission's new Vehicle Environmental Test center in Indianapolis is open for business for external and in-house customers alike. The VET has everything vehicle development teams need to improve testing efficiencies. Editorial The EVs are coming. Now what?
Book

Manual Transmission Clutch Systems

1997-02-01
This book serves as a basic clutch design handbook by covering present and future clutch technologies related to passenger cars and light duty trucks. Chapters cover: History of Clutches Introduction to Modern Diaphragm Spring Clutch Basic Diaphragm Clutch Operating Principles Terminology and Definitions Clutch Operating Parameters Clutch Sizing for Manual Transmission System Engagement Quality Torsional Vibration and Tuning Capacity Testing Clutch Troubleshooting Clutch Quality Control Clutch Friction Materials Clutch Rebuilding and Remanufacturing Clutch Actuation Systems
Book

Design Practices: Passenger Car Automatic Transmissions

2012-05-22
Since the mid-20th Century, automatic transmissions have benefited drivers by automatically changing gear ratios, freeing the driver from having to shift gears manually. The automatic transmission's primary job is to allow the engine to operate in its speed range while providing a wide range of output (vehicle) speeds automatically. The transmission uses gears to make more effective use of the engine's torque and to keep the engine operating at an appropriate speed. For nearly half a century, Design Practices: Passenger Car Automatic Transmissions has been the “go-to” handbook of design considerations for automatic transmission industry engineers of all levels of experience. This latest 4th edition represents a major overhaul from the prior edition and is arguably the most significant update in its long history. In summary, the authors have put together the most definitive handbook for automatic transmission design practices available today.
Book

Principles of Engine Cooling Systems, Components and Maintenance

1990-10-01
Completely revised as a result of the significant progress made in cooling system design and maintenance practices and procedures, HS-40 provides current, comprehensive information on the description, function, and maintenance of engine liquid-cooling systems used in light and heavy-duty vehicles. Information-packed chapters discuss the interrelation between the cooling system and other engine systems, cooling system components, general preventive maintenance, and troubleshooting.
Book

SAE Manual for Incorporating Pneumatic Springs in Vehicle Suspension Designs

1994-09-01
The extensive and increasing use of pneumatic springs in automotive applications has made it appropriate that this manual be prepared to assist the engineer and the designer in understanding the basic principles and uses of pneumatic springs. This manual provides descriptions of the principles involved in pneumatic spring function along with details of the various configurations of pneumatic spring devices and the unique characteristics of each. Pneumatic spring types have been defined correlating with SAE J511 in the SAE (Oct. 1970) handbook regarding pneumatic spring terminology. Background information tracing the evolution of pneumatic springs has been included, as well as some specific examples of design calculations to serve as a guideline for the designer.
Book

2013 and 2014 Passenger Car Yearbook

2013-11-25
This set consists of two books, 2013 Passenger Car Yearbook, and 2014 Passenger Car Yearbook. Both include articles that were written by the award-winning editors of Automotive Engineering International. Both books detail the key engineering developments in the passenger vehicle industry of that year. Each new car model is profiled in its own chapter with one or more articles.
Book

Honda R&D Technical Review: April 2007

2007-04-01
This unique publication chronicles the top Honda technical developments from October 2006 through March 2007. The 27 papers included give rare insight into the Honda's worldwide R&D team, and cover automotive, motorcycle, power products, and other fundamental technologies. Full-color diagrams complement the text. Title highlights include: Development of 1.8L Flexible Fuel Vehicle System for 2007 Model Year CIVIC for Brazil Hydraulic Control Technologies with Robust Stability and Performance for CVT Start Clutch Development of New BF90 Outboard Motor Research on Extended Expansion General-Purpose Engine (Part 2)- Heat Release and Brake Performance Thermal Management of Air-cooled Motorcycle Engines Using Forced Oil-cooling System Motorcycle Dynamic Simulation Model Incorporating Actual Rider Behavior Data This publication is available in both print and electronic format. The electronic format is also conveniently available for purchase in individual chapters.
Book

Honda R&D Technical Review: October 2008

2008-10-01
This unique book gives chronicles the top Honda technical developments from April through September 2008. The 21 papers included give rare insight into Honda's worldwide R&D team, and cover automotive, motorcycle, power products, and other fundamental technologies. Full-color diagrams complement the text. Title highlights include: Mechanism of Occurrence of Ghost Noise in Helical Gears Resulting from Thread-type Tool Machining Development of Front Pillar for Visibility Enhancement Development of 5-speed Dual-clutch Transmission System for All-Terrain Vehicle Motorcycle Riding Simulator Enabling Experience of Honda's Advanced Brake Systems Running Gait Generation for Biped Robot This publication is available in both print and electronic format. The electronic format is also conveniently available for purchase in individual chapters.
Book

Honda R&D Technical Review: April 2010

2010-04-01
This 207-page e-book gives unique insight into the cutting-edge technical developments from Honda's worldwide R&D team. The 27 papers included in this volume chronicle the best of Honda's documented technical advancements from October 2009 through April 2010 and cover automotive, motorcycle, power products, and other fundamental technologies. Full-color diagrams complement the text. Title highlights include: Styling Development of the New Model CR-Z Honda Small Hybrid Sports Car Development of the New Honda Techmatic System Development of the New Honda 6-Speed Automatic Transmission for MDX Next Generation Vehicle Safety System Research via Wireless Communication Research in Technology for Simulating Dynamic Behavior of Cam Drive Mechanisms in Single Cylinder Engines Development of NOx Reduction System Based on Exhaust Valve Controls for Use in Small Motorcycle Engines This publication is also conveniently available for purchase in individual chapters.
Book

5th AVL International Commercial Powertrain Conference Proceedings (2009)

2009-01-01
The AVL International Commercial Powertrain Conference is the premier forum for truck, agricultural and construction equipment manufacturers to discuss powertrain technology challenges and solutions across their industries. The topics of the conference, which happens every two years, cover all five elements of a modern powertrain: engine, transmission, electric motor, battery and the electronic control which are used basically the same way in the quest for optimal efficiency and environmental compatibility. This event offers a unique opportunity for highly regarded professionals to address the synergy effects and distinctive characteristics of commercial vehicles, agricultural tractors and non-road vehicles, and industrial machinery. These proceedings include 23 papers from four categories of sessions: Setting the Scene; Different Industries - Same Topics; Innovative Products and Technologies, and Future Outlook.
Book

2nd AVL International Commercial Powertrain Conference Proceedings (2003)

2003-01-01
The AVL International Commercial Powertrain Conference is the premier forum for truck, agricultural and construction equipment manufacturers to discuss powertrain technology challenges and solutions across their industries. The topics of the conference, which happens every two years, cover all five elements of a modern powertrain: engine, transmission, electric motor, battery and the electronic control which are used basically the same way in the quest for optimal efficiency and environmental compatibility. This event offers a unique opportunity for highly regarded professionals to address the synergy effects and distinctive characteristics of commercial vehicles, agricultural tractors and non-road vehicles, and industrial machinery. These proceedings include 21 papers from four categories of sessions: Setting the Scene; Different Worlds-Different Technologies; Engineering Partnerships and What Next in Development and Production.
Book

4th AVL International Commercial Powertrain Conference Proceedings (2007)

2007-01-01
The AVL International Commercial Powertrain Conference is the premier forum for truck, agricultural and construction equipment manufacturers to discuss powertrain technology challenges and solutions across their industries. The topics of the conference, which happens every two years, cover all five elements of a modern powertrain: engine, transmission, electric motor, battery and the electronic control which are used basically the same way in the quest for optimal efficiency and environmental compatibility. This event offers a unique opportunity for highly regarded professionals to address the synergy effects and distinctive characteristics of commercial vehicles, agricultural tractors and non-road vehicles, and industrial machinery. These proceedings include 21 papers from four categories of sessions: Setting the Scene; Different Worlds - Same Technologies; Industry Specific Product Solutions and The Future of Commercial Powertrain Development.
Book

Honda R&D Technical Review April 2016

2016-04-01
Honda's April 2016 R&D Technical Review features cutting-edge developments and new ways of solving engineering problems from Honda's worldwide R&D teams. This edition brings 23 technical papers and provides featured topics that include: • Development of New Fuel Cell Vehicle CLARITY FUEL CELL • Development of RC213V-S • Introduction of Heat Exchanger Production Technique for Stirling Engine Using Additive Manufacturing
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