Dinamica del veicolo - inglese

- CFU

dynamics

Vehicle 2019-2020 12

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Modena Reggio

dqll'Università di

dall'autore

autorizzata o

immagini non e

espressamente Full list of contents

I

Lecture Kincmatic steerinp rolling flat

for rigid in pure

thin wheel on surface.

Noreholonomic a

constraints a trailer,

two

bicycle, wheeled

wrth non-holonomio constraints:

configuratron ofmechanisms

Numtrer ofdegrees offreedom drmension

and space isostatic

tricycle, four vehicle with mechanism and suspension system.

wheeled steering

geometry.

Ackermann steerinB (Bourlet

A geometry system),

Ackermarm steering steering

steering mechanism respecting

Jeantaud Panhard steering systems

e with with multrple

two vehicles steering axles.

of vehicles more than axles;

Steering of

Krnematlc steering lrailers. path.

Two four trailer.

trailer straisht

on wheeled

whceled

Lecture Lonsitudinal dvnamics

2 1 global

(weight equilibrium, equilibrium).

ofa forces, wheel

nro

Dynamic vehicle in motion and aerodynamic

equilibrium straight

a,xle

Roiling resistance coeffi cient.

t.'"1 '

drivel'

Rèarwheel ; grip.

available

Ma,ximum maximum maximum due to

speed, slope

acceleration,

offour with optimal traction

wheel drive, balanc€.

Case i''

i i:

fru"ti*powe.fo,t ='-':

aveilingatconstantspeed, P,.1

maximum havelting

rario for

Speed reaching the speed. '

,i

{first J

Choice of lowest ratio maximum

sreed slooe).

sear-

f,ertnre [,onoitudinel dmemics

3 2 in

ratios gearbox.

Different sriteria for ofintermediate

the choice speed a of

efficienry, inertia.

equivalent

partia.l equivalent moment

drivekain mass,

Performarnce,

;d applications. rr.:

with

power

Global equilibrium equation, r

Work in

soent svncronizers.

Lecture Gearbores

4 with gcar

ofgearboxes ordinary

description tratns.

Basic elements and

rings

Syncronizer K, Volvo" Dual--rlutch Zeroshift transmission.

Lancia transmission,

Examples: without friction-

gear

Kinematic ofplanetary trains,

static analysis

and with

ofauthomatic olanetaw

Examnles searboxes sear trains.

I

f,crture I)ifferentials

5 differeuti#-

spn-gear

g"m Oifferentiais'and

Aevet "

differential.

ice Locked

on

spinning

rvheel

One ritt uteels

ynTrlgg-f

efficiency, staticzmalysrs,

cooto*uarcdon:

6*'iiii"."lnlrr effect.

locking

and

Toroue bias ;

differentials.

slip

Limited axle.

Saìisbury u t

differentials.

Vrscous

Active dillèrentials.

Fffin."l cenfal dift'erential'

of

drir" vehicles: case vehicles

wheel drive

for four

gearboxes

torque

split

Uneven vshicles'

wlreel drive

for fuur

gearboxes

torque

split

of unsven

statiJanalysis

Xinematià and coupling.

with viscous

drive

wheel

Four Four)'

l6GT

Juke

Nissan

Audi S-Tronic,

(Alfa 155

Examples Q4,

pt"* joints: Myard's theorem.

H"*"k"*t" veloci§

*nstant

"f joint. Trrpod loint

Rzeppa

Clemens.;oinl.. mornents.

secondarY

oflqlokinetiq

tuti" g-oxptmg§,:vrth

;"-gr*;';ifr;;dbÀ*à u"avsis joìnts

velocity

two constant

wrth

transmission

homokmenc

of a

analvsrs

Sta-hc r.*-L-iildic dnve

Rofi vehi es.

for wheel' cl

rssions

.transm

-*;.1

",l. moflon'

straight

during

balance

brahng

Optimal ì

ì"r

-"

', c

EGlibriuir equati6-ns

tr'

/, B.ralting,diagram. conditions'

opiinal braking

ìrloo. system:

braking

of

Analysis a basie cient.

coef'fi

balance

brake

Optimal gravity

of

position of center

optimal

on

Còmments braking

during

ofawheel

Stabili§ anatysis I

power evaluation

Braking delay

transfer

load

longitudinal

on

Comments

,t of suspensionmechanisms'

classificatl-on

General MacPherson.

Double

of,er De Dicin'

Five arms,

echanisms

m

of susp€f,islon

car

Descnption paranetcrs.

§incrnatic algorithm)'

of three spheres

(intersection

mechanisms

MacPherson

Àrit u*tyro and

wishbone

Double

of

on anallsis.

Velociq acceleration

and

point the

rigid wheel to

of a

Contact suspenston'

wishbone

ofa Double

analysis

Static suspension

of

(grormd) stittress a

Equivatent a'suspenslon'

codreiemt'of

(groulnd)'dairtprng'

Equivalent

absorbers.

Shock withdriréslErent

arax]s,

of

stiffhess

md vertisal

Rollstiflness axles

t at the

lsd'iransters

#; t,r,'o

.tr-rj*tif&ress'on lateral

of "h6"it suspcmrons

anti-squàt

ifr and

Anti-dive, antr-l

ofa suspensions'

on elastic

car

anall'srs

Srarrc with

forwhesl

nomenclah{e

and

Reftrence torque).

with slip angle arrd

with slip'angle;

rolling,

(p,..e rotling

Kirrer"aii.s r,

i-

coefFruents.

Stip -

ffitnifraroi?ei]

model.

Brush ground forces.

of tangential

Resultant tratì,

Pneumatic thrust-

force and Camber

Camber ground.force-

Longitudinal forcel

ground

Lateral ground

tagentral I'orces

of {rombined

Effect ground forces

of tangential

force on

vertical

E{I-ects models.

Semiemprrica[ '' i

i

ofa car.

Planarmodel (ktnematic) eqmtrons'

congruenee

Vehicle of gravi§u

of centre

Acoelsration -

equatims.

Equilibrium

eo.rstiEtive(tyreì€qu6&ons; I

j t'

centres.and,roll-a*s,

Roll 5:

,

+.;

t ffi,1,H,r,u*,,

calcula$

lrans[ers:

load

ì.areral

ffixffL*,,,,**r*

l7

turc o'*"-1,

behavlour

ItwsY stal€

Stedry margln'

rytrl cr^ric margln.

"* -^i^, slahc

ard

il point

f:t""' n:Y-Tr,.";h6

laterul

ola

Effects cornel

creA.lv srate

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r".ìi, ", t

compltance J

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StabilirY ctld't1tl.-...-

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- running

straight

I

a

durlnB

lndersteer/oversteer

t mo*]:*^--

track

single

Étn"i* tne

trrE

afiout ""'t'' :'--'_e"termann

Crtticlsm .+.arino seometry.

geometry.

stee.ng

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on 1oe

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