POWER AND PROPULSION
• Hypoid Ring and Pinion Gears −− Gearing fundamentals −− Spiral bevel review −− Hypoid
This two-hour course will discuss the packaging, functionality, and economics of IVT architecture and expose the positive and negative aspects of IVT. The IVTs discussed use a particular type of CVT called a Double Roller Full Toroidal Variator (DFTV) which is the most compact and efficient CVT technology currently available. Learning Objectives By participating in this course, you will be able to: • Describe in principal the physical mechanism involved in traction drives and the functional components of the DFTV-CVT • Describe and illustrate the IVT mechanical principal using a CVT including hybrid variants • Identify where the functional attributes of the IVT can be best used in real vehicle applications • Compare the cost benefits, packaging advantages and design flexibility of the IVT • Define the control system philosophy required for an IVT • Develop representative simulation models of real vehicles using an IVT drivetrain, if familiar with simulation software such as Simulink® Who Should Attend This course addresses the needs of engineers involved in the selection or design of the most appropriate drivetrain solutions should attend. A cross-section of professionals within OEMs and Tier1 transmission manufacturers, including technical sales people and control engineers, will benefit. Topical Outline • Introduction What is an IVT? −− Packaging, weight and cost advantages −− Functionality with IVT; off road vehicles and hybrids • Traction Drives and Toroidal Variators −− Traction drives −− Toroidal variators; full, half and double roller; spin and efficiency −− Steering, clamping and parasitic losses • “Single Regime IVT” −− Ratio choices for optimum performance; the importance of CVT ratio spread −− Recirculating power, geared neutral; how these are managed in an IVT −− The efficiency “map” of an IVT using the DFTV-CVT • Direct Over Drive (DOD) as a method of maximizing efficiency at cruise • Design of a Transmission for a Compact SUV with Off- road Capabilities −− Functional OEM specification; maximum wheel torque and duty cycle −− Concept and preliminary design −− Design validation • Component Parts of the IVT, associated BOM and transmission costing
−− Review face milling vs. face hobbing −− Review how to correctly set-up gear set −− Review correct contact pattern −− Importance of bearing preload and how to set −− Break-in procedure −− Tire size, speedometer accuracy • Axle Shafts −− Primary function −− Materials −− Spline details • Driveshafts −− Driveshaft considerations −− Universal joint: Replacement; Sizes; Retention methods • Pinion angle
Instructor: Fee: $1415
Joseph Palazzolo
1.3 CEUs
URL:
sae.org/learn/content/c1113/
Infinitely Variable Transmissions Using a Toroidal Traction Variator Web Seminar RePlay 2 Hours | On Demand Course I.D.# PD331709ON An Infinitely Variable Transmission (IVT) is a subset of a CVT (Continuously Variable Transmission) defined as a device that has a range of ratios of input shaft speed to output shaft speed which includes an Infinite ratio in which the output speed is zero. Typically these devices include both positive and negative ratios on either side of zero resulting in the ability to move forward and reverse from rest without a clutch: IVTs can improve vehicle performance while maintaining or exceeding benchmark functionality and performance. IVTs are a good candidate for future, fuel-efficient vehicles, particularly hybrids and AWDs. An IVT can maintain superb functionality and performance while reducing fleet CO 2 levels. No vehicles other than heavy tractors currently use IVT trans- missions. A number of companies have looked at implementing IVT but they have failed to find an economical solution with sufficient upside to warrant its introduction, despite the attractive functional benefits. The use of the newly developed Double Roller Full Toroidal Variator - Continuously Variable Transmission (DFTV-CVT) has enabled a much simpler IVT solution that can be manufactured for potentially a lower cost than other belt or chain style CVT designs and / or multispeed transmissions The technology presented in this Webinar is based on the combination of a Double Roller Toroidal Traction Drive (DFTV-CVT) with a Planetary gear train (PGT).
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3 ways to get a no-obligation price quote to deliver a course to your company: Call SAE Corporate Learning at +1.724.772.8529 | Fill out the online quote request at sae.org/corplearning | Email us at corplearn@sae.org
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