A Familiarization of Drivetrain Components

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Detailed Overview/Outline

The goal of this seminar is for attendees to be able to visualize both individual components and the entire drivetrain system without reference to complicated equations. The seminar will focus on the terms, functions, nomenclature, operating characteristics and effect on vehicle performance for each of the drivetrain components. Attendees will be equipped to evaluate the space requirements, mounting needs, clearances required, and effect on vehicle performance of each component.

This course will serve as an introduction to the various components of the drivetrain, including the clutch or torque converter, manual or automatic transmission, driveshaft, axle, wheelends, and brakes. It will provide insight into the structure and function of each component. Vehicle performance and related noise, vibration and harshness issues will be addressed.

An efficient, durable, and quiet running drivetrain is as essential to customer satisfaction as styling and interior creature comforts. In this course various methods that can be used to accomplish this goal will be presented.

Benefits of Attending
By attending this course, you will:

• Examine both practical and technical aspects of smoothing clutch operation by incorporating cushion and torsional dampers
• Evaluate different types of transmission synchronizers, automatic transmission torque converters, hydraulic clutch operation and epicyclic gear trains
• Study the interaction of gear ratios and vehicle performance as related to engine horsepower and torque curves
• Develop skills for fazing and mounting of propeller shafts as related to torsional excitation and secondary couple loads
• Review various types of differentials
• Compare common misconceptions of limited slip devices to their actual performance
• Examine four-wheel drive systems and the need for an inter axle differential
• Investigate electronic control of torque through braking and clutching devices
• View the total drivetrain package as a system

Who Should Attend
This course is intended for engineers now working with passenger car, sport utility, truck, bus, industrial, and off-highway vehicles, who have had minimal prior experience with the total drivetrain such as:

• Recent engineering graduates who have a need for basic knowledge of the overall drivetrain
• Managers who now have responsibility for the total drivetrain system but have not had experience with all drivetrain components
• Drivetrain component specialists who need to be familiar with the interaction of their component to the rest of the drivetrain
• Body, chassis, and suspension engineers who want to do a better job of packaging and interfacing with the drivetrain
• Account managers with non-engineering degrees who are responsible for selling drivetrain components

Seminar Content
CLUTCH (dry/wet)

• Pressure Plate (Cover)
• Direct pressure
• Indirect pressure
• Belleville
• Over center springs
• Disc
• Hub
• Facing support member
• Torsional damper
• damper springs
• co-axial damper springs
• damper friction devices (providers of hysteresis)-- sleeve spring and button type, Belleville type, wave spring type
• Facings - Organic; Ceramic/metallic; cushion types (cantilever spring; wave spring)
• Linkage
• Hydraulic
• Cable
• Mechanical
• Assisted

TRANSMISSION

• Automatic
• Hydraulically controlled
• Electronically controlled
• Planetary or epicyclical gearing
• Hydraulic multi-disc clutches - non-rotating; rotating centrifugal pressure effect
• Torque Converters
• Impeller
• Turbine
• Stator
• Lock-up clutch
• Manual
• Synchronized
• Non-Synchronized
• Electronically shifted
• Gear rattle

DRIVESHAFT

• Cardan Joints
• Torsional excitation -- cancellation (two or more joints)
• Secondary couple
• Constant Velocity Joints
• Rzeppa type
• Others

AXLE

• Rigid -- Semi-float; Full-float; Carrier type; Banjo type
• Steering
• Independent
• Gearing -- Spiral bevel; Hypoid
• Differentials
• Two pinion
• Four pinion
• Limited slips
• Full locking
• Plate types -- spring loading of plates; springs between side gears and plates; springs between gears; gear loading of plates
• Cam loading of plates
• Viscous types
• Speed loaded types -- hydraulic pump; viscous pump

TRANSFER CASE

• Full Time
• The requirement for a differential -- bevel differential; planetary differential
• Part Time
• Two-wheel drive
• Locked four-wheel drive

WHEEL ENDS

• Independent
• Reduction
• Planetary
• Ring & pinion drop

BRAKES

• Disc
• Drum
• Electronic Control of Brakes and Torque
• Analog - increasing sine wave speed sensitive
• Hall effect - square wave; displacement sensitive

Sponsor Background:
About SAE

What do cars, aircraft, trucks, off-highway equipment, engines, materials, manufacturing, and fuels have in common? SAE. The Society of Automotive Engineers is your one-stop resource for technical information and expertise used in designing, building, maintaining, and operating self-propelled vehicles for use on land or sea, in air or space.

Who we are & what we do

Nearly 80,000 engineers, business executives, educators, and students from more than 97 countries form our network of members who share information and exchange ideas for advancing the engineering of mobility systems. More than 16,000 volunteer leaders serve on our Board of Directors and our many other boards, councils and committees. Our technical committees write more new aerospace and automotive engineering standards than any other standards-writing organization in the world. We publish thousands of technical papers and books each year, and leading-edge periodicals and Internet and CD-ROM products too. Our Cooperative Research Program helps facilitate projects that benefit the mobility industry as a whole. Numerous meetings and expositions provide worldwide opportunities to network and share information. We also offer a full complement of professional development activities such as seminars, workshops, and continuing education programs. The meetings and activities of local sections provide an opportunity to network with colleagues near you.

Services for the public and the profession

Every day, we demonstrate our commitment to society through local, national, and international public awareness programs that promote vehicle safety and maintenance and energy resource conservation. Through the SAE Foundation, we are also deeply involved in the engineering-related education of children, teachers , college students, and faculty. Industry and faculty awards provide recognition to outstanding contributors in the profession.

Since its founding in 1905, SAE's dedicated people, strong technical base, and vision have helped serve the professional needs of engineers and the transportation needs of humanity. We are clearly poised to continue that role into the 21st century.

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