S 55 AMG (220.173) V8-5.5L (113.982) (2001)
Refueling Vapor Recovery System: Description and Operation
On-Board Refueling Vapor Recovery Function
Up to 31.Aug.00
On-Board Refueling Vapor Recovery Function
MODEL 129 with ENGINE 112, 113 with CODE (494a) USA version
MODEL 170 up to 31.8.00 with ENGINE 111, 112 with CODE (494a) USA version
MODEL 210.2 with ENGINE 112, 113 with CODE (494a) USA version
MODEL 210.0 up to 31.5.01 with ENGINE 112, 113 with CODE (494a) USA version
MODEL 220 up to 31.8.00 with ENGINE 112, 113, 137 with CODE (494a) USA version
MODEL 215 up to 31.8.00 with ENGINE 137, 113 with CODE (494a) USA version
Shown on Model 210 sedan
45
Filler neck (connection for collecting fuel vapors when refueling)
45/1
Flap
45/2
Float with flap
45/3
Corrugated tube
45/4
Pressure relief valve (in top insert integrated at corrugated tube, release pressure approx. 60 - 90 mbar)
75
Fuel tank
77
Activated charcoal canister 77/1 Pressure relief valve (release pressure approx. 30 - 40 mbar)
82
Pressure relief valve in ORVR vent line (release pressure approx. 60 - 90 mbar)
Y58/1
Purge control valve
Y58/4
Activated charcoal canister shutoff valve
A
Nozzle, extraction through metal tube
B
Nozzle, extraction through rubber boot (overflow not recognizable)
a
ORVR vent line (from filler neck to activated charcoal canister)
b
Hose line to pressure relief valve
c
Fuel overflow line to atmosphere
d
to engine
e
Fuel overflow line to atmosphere (to tank recess)
f
Fuel tank air admission line
Task
-
The legislator requires, that the refueling gases in the vehicle are collected (ORVR = Onboard Refueling Vapor Recovery).
-
Separate fuel and refueling gases to prevent fuel from flowing into the activated charcoal canister due to inappropriate refueling or a defective
nozzle.