Pro
te
c
t
ed
b
y
co
p
y
rig
h
t.
C
o
p
y
in
g
fo
r
pr
iv
a
t
e
o
r
c
o
m
m
e
r
c
ia
l
p
u
rp
o
s
e
s
,
i
n
p
a
rt
o
r i
n
w
h
o
le
,
is
n
o
t
p
e
r
m
it
t
e
d
u
n
l
e
s
s
a
ut
ho
r
i
s
ed
b
y
V
olk
sw
a
ge
n AG
.
V
olk
s
w
a
g
en
AG do
es
n
ot g
uar
ante
e
or a
c
c
ep
t
a
ny
li
a
b
i
li
t
y
w
ith
r
e
s
p
e
c
t
t
o
th
e
c
o
rr
e
c
t
n
e
s
s
o
f
in
fo
r
m
a
tio
n
in
th
is
d
o
c
um
en
t.
C
o
py
rig
ht b
y
V
olk
sw
a
ge
n
A
G.
opens the throttle valve by the same amount. The throttle is then
approximately half open.
When the engine is running (under load), the engine control unit
can open or close the throttle valve independently of the accel‐
erator position sender.
This means that the throttle valve can already be completely open
even though the accelerator is depressed half way. This has the
advantage of preventing throttling losses at the throttle valve.
This also results in significantly improved consumption and ex‐
haust emission values under certain load conditions.
The torque required by the engine can be produced by the engine
control unit by optimising the combination of throttle valve cross-
section and charge pressure.
After evaluating the torque requirements of various components
(e.g. air conditioning system, automatic gearbox, ABS/ESP and
so on), the engine control unit calculates the optimal throttle valve
opening angle for the respective situation.
Observe safety precautions
⇒ page 128
.
Observe rules for cleanliness
⇒ page 128
.
Phaeton 2003 ➤
6-cylinder injection engine - Edition 02.2014
154
Rep. gr.20 - Fuel supply system
