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Book

1994 Fundamentals of GD&T - Textbook (2nd Edition)

2014-07-17
The Fundamentals of Geometric Dimensioning and Tolerancing textbook by Alex Krulikowski covers the basic rules, definitions, and concepts of GD&T. The book's 12 chapters are split into 28 goals, each focusing on a major topic that must be mastered to be fluent in the fundamentals of geometric tolerancing.
Book

1994 Ultimate Pocket Guide - Spanish Version

2014-07-16
A Spanish language version of a valuable geometric dimensioning and tolerancing (GD&T) resource is now available. The Ultimate GD&T Pocket Guide, a 77-page booklet that's an indespensable reference tool for anyone who uses engineering drawings has been translated into Spanish.
Technical Paper

1D Modeling of the Outwardly Opening Direct Injection for Internal Combustion Engines Operating with Gaseous and Liquid Fuels

2021-09-05
2021-24-0006
The in-cylinder direct injection of fuels can be a further step towards cleaner and more efficient internal combustion engines. However, the injector design and its characterization, both experimental and from numerical simulation require accurate diagnostics and efficient models. This work aims to simulate the complex behavior of the gaseous and liquid jets through an outwardly opening injector characterized by optical diagnostics using a one-dimensional model without using three dimensional models. The behavior of the jet from an outwardly opening injector changes according to the type of fuel. In the case of the gas, the experimental investigations put in evidence three main jet regions: 1) near-field region where the jet shows a complex gas-dynamic structure; 2) transition region characterized by intense mixing; 3) far-field region characterized by a fully developed subsonic turbulent jet.
Technical Paper

2000 University of Maryland FutureTruck Design Description

2001-03-05
2001-01-0681
The University of Maryland team converted a model year 2000 Chevrolet Suburban to an ethanol-fueled hybrid-electric vehicle (HEV) and tied for first place overall in the 2000 FutureTruck competition. Competition goals include a two-thirds reduction of greenhouse gas (GHG) emissions, a reduction of exhaust emissions to meet California ultra-low emissions vehicle (ULEV) Tier II standards, and an increase in fuel economy. These goals must be met without compromising the performance, amenities, safety, or ease of manufacture of the stock Suburban. The University of Maryland FutureTruck, Proteus, addresses the competition goals with a powertrain consisting of a General Motors 3.8-L V6 engine, a 75-kW (100 hp) SatCon electric motor, and a 336-V battery pack. Additionally, Proteus incorporates several emissions-reducing and energy-saving modifications; an advanced control strategy that is implemented through use of an on-board computer and an innovative hybrid-electric drive train.
Book

2009 Fundamentals of GD&T Textbook

2014-07-16
The Fundamentals of Geometric Dimensioning and Tolerancing Using Critical Thinking Skills textbook has been completely updated to reflect the changes in the ASME Y14.5-2009 Standard. This third edition preserves the best features of the first two editions while adding new material that reflects the changes in the field of geometric tolerancing. The book includes several new features that aid in the understanding of geometric tolerancing. It also focuses on critical thinking skills that help the reader with the application of newly learned GD&T concepts on the job. It's the most practical and easy-to-use GD&T text on the market.
Book

2018 Ultimate GD&T Pocket Guide 2nd Ed

2020-11-23
The 2018 Ultimate GD&T Pocket Guide explains the most common rules, symbols, and concepts used in geometric dimensioning and tolerancing. This one-of-a-kind reference guide includes more than 100 detailed examples to illustrate concepts. Numerous charts for quick reference provide explanations of each GD&T symbol, modifier, and more. This valuable on-the-job resource clarifies how to interpret standard-compliant technical drawings that use ASME Y14.5-2018.
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