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43
Hybrid system
Hybrid4 frequently asked questions
ZEV
(
Zero Emissions Vehicle
)
mode
Question
A
nswer
Why is it not always possible
f
or me to put the
vehicle into ZEV
(
Zero Emissions Vehicle
)
mode
e
ven thou
g
h the batter
y
is well char
g
ed?
This situation is temporary.
C
ertain conditions will occasionall
y
prevent the chan
g
e to ZEV mode, even i
f
the batter
y
has
s
ufficient char
g
e, such as, for example, ver
y
cold conditions, altitude, demistin
g
, hi
g
h demand for
h
eatin
g
or air conditionin
g
, re
g
eneration of the particle emissions filter
(
PEF
)
.
Wh
y
do I sometimes see an alert messa
g
e
"
Electric mode not available: PEF re
g
eneration
in pro
g
ress"?
This is an messa
g
e relatin
g
to the re
g
eneration of the particle emissions filter
(
PEF
)
. This is a
c
ompletel
y
normal process that takes place ever
y
240 or 300 miles
(
400 or 500 km
)
(
or more
frequentl
y
in prolon
g
ed urban use
)
, as on a conventional HDi vehicle.
Thi
s process
i
s not
g
enera
lly
not
i
ce
d
by
t
h
e
d
r
i
ver.
O
n the other hand, in the case o
f
a h
y
brid, this phenomenon ma
y
be noticeable
(
in urban use
)
as temporar
ily
t
h
e
HDi
en
gi
ne w
ill
not stop an
d
t
hi
s messa
g
e w
ill
b
e
di
sp
l
a
y
e
d
at
i
nterva
l
s w
hil
e
regeneration is in progress.
Wh
y
is it not possible for me to put the vehicle
into ZEV mode, even thou
g
h I had
j
ust been
r
unnin
g
electricall
y
in Auto mode?
The mana
g
ement of ZEV is different from Auto mode.
Chan
g
in
g
to ZEV mode is onl
y
possible with a batter
y
char
g
e of at least 4 bars, in order to assure
s
ufficient ran
g
e.
In Auto mode, the s
y
stem alone mana
g
es the conditions
f
or chan
g
in
g
temporaril
y
to electric
m
ode,
f
or shorter periods and with a lower state o
f
char
g
e o
f
the batter
y
.
Wh
y
is the ran
g
e in ZEV
(
Zero Emissions
Vehicle
)
mode lower when climbin
g?
The vehicle needs more ener
gy
when climbin
g
than when runnin
g
on the level.
S
o it is better to sta
y
in Auto mode, which will
f
avour operation o
f
the Diesel en
g
ine.
Why is it that the system makes me come out o
f
ZEV
(
Zero Emissions Vehicle
)
mode; it does not
r
eturn to ZEV automaticall
y
when the conditions
a
ll
o
w?
It is not intended to give pre
f
erence to ZEV running at any cost, as it is not always the most
eco
n
o
mi
ca
l m
ode
.
So the s
y
stem returns automaticall
y
to Auto mode.
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