GF47.30-P-3013AM Fuel Evaporation Control System, Function
GF47.30-P-3013AM Fuel Evaporation Control System, Function
MODEL 211, 219 with ENGINE 113.990
MODEL 215, 220 with ENGINE 113.991
MODEL 230 with ENGINE 113.992 /995 up to Model Year 2008 /AEJ 07
MODEL 463 up to 31.5.12 with ENGINE 113.993
Model 211, 219
45 Filler neck
55/1 Fuel filter with fuel pressure regulator
71 Check valve
72 Float valve
75 Fuel tank
75/1 Expansion reservoir
77 Activated charcoal canister
77/1 Vent/breather line
88 Fuel delivery module
95 Suction jet pump
95a Suction jet pump with check valve
M3 Fuel pump (fuel double pump)
N3/10 ME-SFI [ME] control unit
Y58/1 Purge control valve
a Fuel pipe
b Purge line
c Electrical line
d Vent/breather line
The fuel evaporation control system prevents fuel vapors escaping to atmosphere. This is done by storing the fuel vapors temporarily in the activated charcoal canister.
When the engine is running, the fuel vapors stored in the activated charcoal canister are checked and suctioned off over the purge control valve and burnt in the engine.
A check valve in the purge line prevents the boost pressure building up toward the activated charcoal canister.
Purging of the activated charcoal canister takes place at:
^ Coolant temperature greater than 70 °C
^ greater than 2 minutes after engine start
^ Engine not in the overrun mode
^ Engine not in the lambda adaptation phase
In order to control the purge quantity, the purge control valve is actuated and pulsed by the ME-SFI [ME] control unit by means of a PWM signal (pulse width modulated signal).
The purge quantity is determined by constantly opening and closing the purge control valve (with on periods of varying lengths).
A richer or leaner fuel-air mixture is produced in line with the charge of the activated charcoal canister with fuel vapors.
The idle speed control ensures that there are no changes in the engine speed at idle speed due to regeneration.
Model 230 as of 2006
In the purge line between the activated charcoal canister and the purge control valve there is a fluid reservoir installed directly upstream of the purge control valve.
1 Model 211, 219
1.1 Refueling
The expansion reservoir with float valve is designed to prevent fuel flowing to the activated charcoal canister during refueling (overfilling).
1.2 Air admission to fuel tank
Air is admitted through the activated charcoal canister. This is done through the activated charcoal canister, whereby air is drawn out of the vent/breather line or fuel vapors are drawn from the activated charcoal canister into the fuel tank.
1.3 Fuel tank venting
The fuel tank is vented through the activated charcoal canister. The fuel vapors flow to the activated charcoal canister, where they are stored or drawn into the intake manifold in case of simultaneous regeneration.
Models 215, 220, 230, 463
55 Fuel filter
55/2 Fuel pressure regulator 5.0 bar
55/3 Fuel pressure regulator 5.3 bar
55/3a Throttle
55/4 Splash bowl
71 Check valve
75 Fuel tank
76 Vent valve (except and model 463)
77 Activated charcoal canister
77/1 Vent/breather line
95 Suction jet pump
B4/7 Fuel pressure sensor
M3 Fuel pump
M3/1 Intank fuel pump
N3/10 ME-SFI [ME] control unit
Y58/1 Purge control valve
a Fuel pipe
b Purge line
c Electrical line
d Vent/breather line
2 Model 215, 220, 230
2.1 Refueling (other than )
The opening pressure of the vent valve of approx. 30 to 50 mbar is not reached if the tank cover has been removed. The vent line to the activated charcoal canister remains closed off. As a result, nozzle is shut off and fuel is not able to reach the activated charcoal canister.
2.2 Air admission to fuel tank
The vent valve opens at a vacuum of approx. 1 up to 16 mbar in the fuel tank (except).
Air is drawn out of the vent/breather line of the activated charcoal canister or fuel vapors are drawn from the activated charcoal canister into the fuel tank.
2.3 Fuel tank venting
The vent valve opens at an excess pressure of about 30 to 50 mbar (except ). The fuel vapors flow to the activated charcoal canister, where they are stored or drawn into the intake manifold in case of simultaneous regeneration.
3 Model 463
3.1 Air admission to fuel tank
Air is admitted through the activated charcoal canister. This is done through the activated charcoal canister, whereby air is drawn out of the vent/breather line or fuel vapors are drawn from the activated charcoal canister into the fuel tank.
3.2 Fuel tank venting
The fuel tank is vented through the activated charcoal canister
The fuel vapors flow to the activated charcoal canister, where they are stored or drawn into the intake manifold approx. 1 up to 16 mbar in the fuel tank (except ). in case of simultaneous regeneration.
Additional vent valve
for model 215 from chassis no. A046659 (ca. 23.03.05) and Model 220 from chassis no. 469233 (ca. 23.03.05), for Ski bag (through-loading feature) code 282 or for Cooling compartment in center rear backrest, code 308 or for additional retrofitted vent valve (76/1), except for 75 Fuel tank
76 Vent valve (standard)
76/1 Additional vent valve
77 Activated charcoal canister
The additional vent valve (76/1) prevents the vacuum from the intake manifold passing over the activated charcoal canister through to the fuel tank for enabled purging. The vent valve also closes as soon as the integrated membrane has a vacuum applied to it from the activated charcoal canister. If a vacuum or vacuum acts in another connection of the vent valve then it opens immediately. This means aeration/venting of the fuel tank is then possible in an unlimited fashion via the standard vent valve (76).
N3/10 ME-SFI [ME] control unit
Y58/1 Purge control valve
A Purge line to intake manifold
B Aeration/ventilation of the activated charcoal canister
C Aeration line to fuel tank
D Purge line to purge control valve
Observe installation position of the additional vent valve. Check aeration/venting of the activated charcoal canister for soiling (e.g. dust, spider webs).
