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Light and Heavy Vehicle Technology
book

Light and Heavy Vehicle Technology

by M.J. Nunney
March 2016
Intermediate to advanced content levelIntermediate to advanced
514 pages
33h 25m
English
Newnes
Content preview from Light and Heavy Vehicle Technology
POWER-ASSISTED STEERING 397
24.2 PRINCIPLES OF POWER-ASSISTED
STEERING
Basic requirements
At the heart of a conventional PAS system is a hydraulic
servo mechanism, which is brought into operation
whenever the resistance to turning the steering wheel
exceeds a predetermined amount. It then furnishes
additional effort to assist the manual operation of the
steering and thus greatly reduces the steering effort that
would otherwise be imposed upon the driver.
An engine-driven pump circulates fluid around the
closed circuit of the servo mechanism and provides a
build-up of hydraulic pressure when needed. As the
steering wheel is turned, a hydrauli ...
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Publisher Resources

ISBN: 9781483105062