Automotive Technology SUSPENSION STEERING LESSON 1 BEGINNING STEERING

Automotive Technology SUSPENSION & STEERING LESSON 1 “BEGINNING STEERING” PROPERTY OF PIMA COUNTY JTED, 2010 1

Bellwork In your notebook respond to the following prompt: Think back to a time when you were riding a bike or a skateboard. Did you ever have a problem steering? What do you think affected the difficulty of steering? Share with a partner and be ready to answer when called upon. PROPERTY OF PIMA COUNTY JTED, 2010 2

Introduction Today we are going to be defining, identifying and explaining steering systems and components. PROPERTY OF PIMA COUNTY JTED, 2010 3

Objectives Before you leave today you will be able to: Define terms Identify and explain steering systems Explain principles of steering Describe rack-and-pinion steering Identify rack-and-pinion steering system components Identify recirculating ball and nut steering system components PROPERTY OF PIMA COUNTY JTED, 2010 4

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Rotary movement in motion a circular direction PROPERTY OF PIMA COUNTY JTED, 2010 5

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Linear movement in motion a straight line PROPERTY OF PIMA COUNTY JTED, 2010 6

K. I. M. Vocabulary K = Key Word I = Information Rackandpinion M = Memory Strategy type of steering system used on the majority of new passenger vehicles and many light trucks PROPERTY OF PIMA COUNTY JTED, 2010 7

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Recirculating type of steering ball & nut (worm gear) system used on heavier vehicles PROPERTY OF PIMA COUNTY JTED, 2010 8

K. I. M. Vocabulary K = Key Word Reaction force I = Information M = Memory Strategy causes suspension systems to react to road conditions PROPERTY OF PIMA COUNTY JTED, 2010 9

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Sprung vehicle weight that is supported weight by the suspension or system mass PROPERTY OF PIMA COUNTY JTED, 2010 10

K. I. M. Vocabulary K = Key Word Unsprung weight or mass I = Information M = Memory Strategy vehicle weight that is not supported by the suspension system PROPERTY OF PIMA COUNTY JTED, 2010 11

K. I. M. Vocabulary K = Key Word Wheel unit location I = Information M = Memory Strategy wheel alignment in relation to the other wheels and the vehicle frame PROPERTY OF PIMA COUNTY JTED, 2010 12

K. I. M. Vocabulary Steering shaft I = Information M = Memory Strategy Steering transfers rotary motion wheel from the driver to the steering shaft PROPERTY OF PIMA COUNTY JTED, 2010 13

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Steering transfers rotary shaft motion from the steering wheel to the steering gearbox PROPERTY OF PIMA COUNTY JTED, 2010 14

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Steering supports column steering wheel and steering shaft PROPERTY OF PIMA COUNTY JTED, 2010 15

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Steering a combination linkage of rods, and arms, that transmit the movement of the steering gear to the wheels PROPERTY OF PIMA COUNTY JTED, 2010 16

K. I. M. Vocabulary K = Key Word I = Information (Ball) Joint M = Memory Strategy swivel connections mounted in the outer ends of the front control arms, and on the steering track rods and tierods PROPERTY OF PIMA COUNTY JTED, 2010 17

K. I. M. Vocabulary K = Key Word Bushing I = Information act as a bearing at suspension fulcrum points, to allow for movement of the component, while maintaining its alignment PROPERTY OF PIMA COUNTY JTED, 2010 M = Memory Strategy 18

K. I. M. Vocabulary K = Key Word Solid axle I = Information M = Memory Strategy reaches from hub to hub; usually transmits power to the wheels (live) PROPERTY OF PIMA COUNTY JTED, 2010 19

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Dead axle does not transmit power to the wheels PROPERTY OF PIMA COUNTY JTED, 2010 20

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Macpherson coil spring strut and shock absorber formed into a single unit PROPERTY OF PIMA COUNTY JTED, 2010 21

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Independent allows for suspension wheels on the same axle to operate individually PROPERTY OF PIMA COUNTY JTED, 2010 22

K. I. M. Vocabulary K = Key Word Coil spring I = Information M = Memory Strategy spiral wound steel wire PROPERTY OF PIMA COUNTY JTED, 2010 23

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy flexible arched Leaf spring metal usually layered with different lengths PROPERTY OF PIMA COUNTY JTED, 2010 24

K. I. M. Vocabulary K = Key Word I = Information M = Memory Strategy Shackle leaf spring attachment to a vehicle’s frame PROPERTY OF PIMA COUNTY JTED, 2010 25

K. I. M. Vocabulary K = Key Word Torsion bar I = Information M = Memory Strategy straight bar that allows spring action by twisting around its center PROPERTY OF PIMA COUNTY JTED, 2010 26

Upper arm Location: above lower arm Connects to the vehicle and the steering knuckle

Lower Arm Location: under the upper arm Connects to the frame and the steering knuckle

Steering Knuckle Location: directly behind the tire Connects to: upper and lower arm, brake system and tires

Ball Joint Allows the tires to flex back and forth and move with the road conditions Commonly wear out Connects to the upper and lower arm and they are bolted to the steering knuckle