Chapter 5 : Transmissions
3
. 2) Need
for a Gearbox
Enides the which connected wheel
case
Torgas source
directly to
最 torgere
waud
FT -
whel radias
↳ s
for vehicle of moss ma = =
tota si .
O-100 km/h in loseconds
=> a =
S == 2, 7Ms
for typ mas m =
1000kg and Mw = 0, 3m =
Tav =
Mr Wa
=
Hum
Ch
↳
from .
S . Mos acce Occur of
start-up to 2-3 times
. Tow
1775Nm- to
Tmo 2, 3 Tav
high Power deliver
=>
= = no source can
thir ?
We
georrativ to
firs this ?
Design of
. 3)
5 Gea box ratia
low should provide /Will
↳
grou
used a Gre speed
high traction for accelerating climbing
I totally = &
high geos higer peed
D
allow
s must
proper motching between
engine Torque speed
When needed
& Lowest Geor vo
highest acceleration is I road lad is
high ?
~ Gear ratio
amplifier engine trique large ratio
large tigue
-
f
↳ However Tractive face is limited georativ limited by tyre-road frictio
is charact .
~ Not an driveline
efficiency
-
eming eintraction face ? Fimac , wall geo
be
ration,
written
for
or
lowest
gear
Can
know
Mc NdTe zu Fina frm Ch. We
FTmax =
Zu
=s
c
ML =
Final = Up Warch
Md Te
Is mor cief of adhesion
=> M1 = w No Wor che in
tyre-road interface
Ls to delumine Warle o
frer body diag .
FA-FRR-wein0 (fuce x-dir I
{
F1 + Fr- =
mac .
W
co-M -
Nr = o (fres Y-dis. I
INf + h(mas + Wim 0)tha Fs bw CosO =
(iement around ()
, =>
combining those
eg . Fe π
When sh =
F+=
ha-h
Ffte
a wads
, front fruco sh usually
small and Fa also ?
ras
FWD >
Only Ff present
RWD is
only F ^
RFWD KF =
G+ hfr
“
pGtpuvano
wwos
#: Daph My Free !
=
µ ( FWD ) =µ
⑤
=AIRWD):
·Apr was ht
o
에
'
gradability
*
M NdTe Traction Forc
Fr
=
Fr NpW Je
rn
~ First limitation of road adhesim
=
Fima =
RFRNPWCO > this must overcome FR
FR =
FA +
FRR + WinO
ming e
AMON--
=>
Fimas-FR =
BFRNP EGO-(fpGsO +
e
mas slops =
(RFIRNp-fr/Gs0 = sin o
traveloble f
ㅇ
. Go ton 0 = GER NP - fR
2nd limitation of
~
engine torque
- not in
general cutical.
Always possible to ↑
year
ratio to F
trative
face ?
*
Highest gear
↳
usually
vehicle
used
for cuising at
high speed
tractive and
attained of dynamic balanc between
~ Mas
speed of
top year ,
as result
resestive
forces ?
>
-
max
speed of vehicle in the highest year my will occur of Certain
engine speed c
*
e
Wetucoa *cCl
e
with Sal
MH
= stp tyre - 0
my =ω -
~ So
for a
target peed if we
top ,
was known Mp can
colculated ?
then er
3
. 2) Need
for a Gearbox
Enides the which connected wheel
case
Torgas source
directly to
最 torgere
waud
FT -
whel radias
↳ s
for vehicle of moss ma = =
tota si .
O-100 km/h in loseconds
=> a =
S == 2, 7Ms
for typ mas m =
1000kg and Mw = 0, 3m =
Tav =
Mr Wa
=
Hum
Ch
↳
from .
S . Mos acce Occur of
start-up to 2-3 times
. Tow
1775Nm- to
Tmo 2, 3 Tav
high Power deliver
=>
= = no source can
thir ?
We
georrativ to
firs this ?
Design of
. 3)
5 Gea box ratia
low should provide /Will
↳
grou
used a Gre speed
high traction for accelerating climbing
I totally = &
high geos higer peed
D
allow
s must
proper motching between
engine Torque speed
When needed
& Lowest Geor vo
highest acceleration is I road lad is
high ?
~ Gear ratio
amplifier engine trique large ratio
large tigue
-
f
↳ However Tractive face is limited georativ limited by tyre-road frictio
is charact .
~ Not an driveline
efficiency
-
eming eintraction face ? Fimac , wall geo
be
ration,
written
for
or
lowest
gear
Can
know
Mc NdTe zu Fina frm Ch. We
FTmax =
Zu
=s
c
ML =
Final = Up Warch
Md Te
Is mor cief of adhesion
=> M1 = w No Wor che in
tyre-road interface
Ls to delumine Warle o
frer body diag .
FA-FRR-wein0 (fuce x-dir I
{
F1 + Fr- =
mac .
W
co-M -
Nr = o (fres Y-dis. I
INf + h(mas + Wim 0)tha Fs bw CosO =
(iement around ()
, =>
combining those
eg . Fe π
When sh =
F+=
ha-h
Ffte
a wads
, front fruco sh usually
small and Fa also ?
ras
FWD >
Only Ff present
RWD is
only F ^
RFWD KF =
G+ hfr
“
pGtpuvano
wwos
#: Daph My Free !
=
µ ( FWD ) =µ
⑤
=AIRWD):
·Apr was ht
o
에
'
gradability
*
M NdTe Traction Forc
Fr
=
Fr NpW Je
rn
~ First limitation of road adhesim
=
Fima =
RFRNPWCO > this must overcome FR
FR =
FA +
FRR + WinO
ming e
AMON--
=>
Fimas-FR =
BFRNP EGO-(fpGsO +
e
mas slops =
(RFIRNp-fr/Gs0 = sin o
traveloble f
ㅇ
. Go ton 0 = GER NP - fR
2nd limitation of
~
engine torque
- not in
general cutical.
Always possible to ↑
year
ratio to F
trative
face ?
*
Highest gear
↳
usually
vehicle
used
for cuising at
high speed
tractive and
attained of dynamic balanc between
~ Mas
speed of
top year ,
as result
resestive
forces ?
>
-
max
speed of vehicle in the highest year my will occur of Certain
engine speed c
*
e
Wetucoa *cCl
e
with Sal
MH
= stp tyre - 0
my =ω -
~ So
for a
target peed if we
top ,
was known Mp can
colculated ?
then er
