Audi Q7 361 - Fuel Tank System

F uel tank
I n terms o f the tank bladder , th e fu el tan k is the same componen t f o r pe tr ol a nd diesel engines. Its use f ul
volume is appro x . 103 l. T h e mai n dif f er e n ces ar e t o be f ou nd i n the fuel tank br eather sy stem and the inside o f the
fuel tank.
F u r t her dif f er enc es, suc h a s the ta nk leak diag nosis system ar e depende n t on the use of the ve h i cle in the
various countries.
An a ppr opriately designed fuel tank br eather syste m ensur e s ea sy r e fuelli ng an d pr eve n ts the fuel tank fr om
lea k in g f o llo win g vehic l e r o ll -o ver .
F uel f i lling level mea s ur ement is the same f o r petr ol an d diesel en gines. I n this c ase, m a gnetic ally pa ss ive
position sensors (MAPPS) ar e used. O n e senso r is f i tted in ea c h c h amb e r .
Le ak di agn o s i s p u mp
(USA only)
Ac t ivated c h ar c o al fil t er
Bub bl e co nt ai ne r
Br e a th er v a lv e
B r e a th er pi pes
No n- r e turn v a l v e
Fla n ge w i th ele c tri c a l
c o nn e c t i on for MA PP S
se n d e r s, f u e l f il t er a n d
fue l tank br e a t h er
sys t e m
36 1_078
No t e
T h e oper a t in g principle of the M A PP S is
described in detail in the se lf- s tudy
p r o g r a mme SSP 282.
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