Fundamentals of Steering Systems     

Open
Enrollment
ACTAR
Approved
On-site
Delivery
Certificate
Program

I.D.# C0716Printable Description
Duration: 3 Days
October 4-6, 2016 (8:30 a.m. - 4:30 p.m. ) - Troy, Michigan  

Hotel & Travel Information

Design and development of a modern steering system influences vehicle response to steering wheel input, driver effort, comfort, safety and fuel economy. In this interactive seminar participants will analyze the steering system from the road wheel to the steering wheel.

Day one will begin with a deep dive into the anatomy and architecture of the lower steering system (wheel end, suspension geometry, linkages and steering gear), its effect on vehicle response and how forces and moments at the contact patch are converted to a torque at the pinion. Next, the anatomy and architecture of the upper steering system (steering column and intermediate shaft) will be explored as well as the role of the upper steering in the occupant protection system, steering non-uniformity, and how torque and angle at the pinion is converted to torque and angle at the steering wheel..

Day two will be devoted to the power assist system anatomy/architecture for hydraulic, electro-hydraulic and electric power steering.

Day three will begin with a discussion of common steering objective tests and how system design and tuning affect steering response, torque feedback and error state performance. The seminar will conclude with a discussion of advanced steering systems such as rear wheel steer, active front steer, active park assist and other driver assistance systems.

Students will have the opportunity to participate in exercises throughout the seminar with the objective of calculating a power steering assist curve for both a hydraulic and electric power steering system. Many physical parts will be available for the students to examine.

This course has been approved by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) for 12 Continuing Education Units (CEUs). Upon completion of this seminar, accredited reconstructionists should contact ACTAR, 800-809-3818, to request CEUs. As an ACTAR approved course, the fee for CEUs is reduced to $5.00.

Learning Objectives
By attending this seminar, you will be able to:

  • Identify common steering and suspension system architectures
  • Compare and contrast different types of steering gears
  • Describe the function of the steering column and intermediate shaft subsystem
  • Describe the influence of system tuning on steering response and torque feedback
  • Compare and contrast different types of power assist systems
  • Describe the effect of power steering on fuel economy
  • Calculate important parameters that affect steering response and torque feedback
  • Describe some of the features of advanced steering systems

Who Should Attend
This seminar is designed for automotive engineers in the vehicle dynamics, chassis, suspension, steering and chassis controls fields who work in product design, development, testing, simulation or research.

Prerequisites
Participants must have a working knowledge of the fundamentals of vehicle dynamics acquired through sufficient work experience or by participating in seminars such as SAE's Vehicle Dynamics for Passenger Cars and Light Trucks (ID# 99020), Chassis and Suspension Component Design for Passenger Cars and Light Trucks (ID# 95025) or Advanced Vehicle Dynamics for Passenger Cars and Light Trucks (ID# C0415).

Topical Outline
DAY ONE

  • Introduction
    • Elements of the steering system
    • Coordinate systems
  • The Lower Steering System
    • Kingpin axis -- Front versus rear steer; Caster angle and kingpin inclination; Caster trail and scrub radius; Steer arm
    • Class exercise - Calculate moment about the kingpin axis for cornering and parking loadcases
    • Linkages/steering geometry -- Rack and pinion; Haltenberger; Parallel linkage
    • Steering gear anatomy and architecture -- Rack and pinion; Recirculating ball
    • Friction and compliances
    • Class exercise - Calculate pinion torque for cornering and parking loadcases
  • The Upper Steering System (steering column & intermediate shaft)
    • Anatomy and architecture
    • Non-uniformity
    • Sources of friction and torsional compliance
    • Role of the upper steering system in the occupant protection system
DAY TWO
  • Power Assist Systems
    • Hydraulic power assist including speed sensitive steering (incl. pump, valve, distribution system)
    • Electro-hydraulic assist (incl. pump and motor assembly)
    • Electric power assisted steering column, pinion, dual pinion, concentric drive and belt drive systems)
    • Class exercise - Calculate a power steering assist curve for hydraulic or electric power assisted steering system
DAY THREE
  • The effect of steering system design and tuning parameters on vehicle level performance
    • Low speed maneuverability
    • High speed on-center steering response and torque feedback
    • High speed cornering response and torque feedback
    • Error states (nibble/wheelfight, pull/drift)
  • Advanced Steering Systems
    • Active Park Assist
    • Active Front Steer
    • Driver assistance features
    • Active rear wheel steer

Instructor(s): Timothy Drotar
Timothy Drotar is currently a senior research engineer at Ford Motor Company Research and Advanced Engineering where he specializes in chassis systems and vehicle dynamics for passenger cars and light trucks. He also has developed engineering training in suspension and steering. Previously, he worked for Saturn Corporation in product engineering. Tim is a member of SAE and SCCA. He holds a B.S. in Mechanical Engineering from Lawrence Technological University and a M.S. in Mechanical Engineering from the University of Michigan.

Fees: $1700.00 ; SAE Members: $1360.00 - $1530.00

2.0 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

Testimonial

"Very informative... Many hours of research saved by attending this course. "
Newton Montano
GM, VP
Trams International

"This class provides a great starting point and gets into enough detail for most non-designers. "
Jared Sebree
Engineering Coordinator
Honda of America MFG

"Tim provides a very thorough overview of common steering systems in a practical, easy to understand, hands on manner. "
Phil Kling
Manager, Product Investigations
General Motors of Canada LTD

"Very informative class on everything that goes into designing a steering system from the ground up."
Cory C. Cousineau
Development Engineer
EMP-Engineered Machined Products, Inc.

To register, click Register button at the top of this page and submit the online form, or contact SAE Customer Service at 1-877-606-7323 (724/776-4970 outside the U.S. and Canada) or at CustomerService@sae.org.

For a quote on bringing this course to your company site, fill out a Corporate Learning Solutions Request Form