Fuel tank: Difference between revisions
| Line 77: | Line 77: | ||
The fuel return flow stream flows out of the return flow nozzle (80/17) into the splash bolw at a high velocity when the fuel pump | The fuel return flow stream flows out of the return flow nozzle (80/17) into the splash bolw at a high velocity when the fuel pump | ||
is operated. As a result, the fuel around the return flow nozzle (80/17) is also entrained and carried into the splash bowl. | is operated. As a result, the fuel around the return flow nozzle (80/17) is also entrained and carried into the splash bowl. | ||
== Fuel level sensor == | |||
<!-- GF47.10-P-3001B, Fuel level sensor, location/task/design/function, 18.3.08 | |||
MODEL 210 with ENGINES 104, 111, 112, 113, 119, 602, 604, 605, 606, 611, 612, 613 | |||
MODEL 129 as of 1.10.95 with ENGINES 104, 112, 113, 119, 120 | |||
MODEL 140 as of 1.4.95 with ENGINE 104, 119, 120, 606 | |||
MODEL 170 with ENGINE 111, 112 | |||
MODEL 220 with ENGINE 112, 113, 137, 275, 613, 628 (except , 113.99) | |||
MODEL 215 with ENGINE 113, 137, 275 (except 113.99) | |||
MODEL 230 with ENGINE 112, 113, 275 (except , 113.99) up to Model Year 08 /AEJ 07 | |||
MODEL 240 with ENGINE 285 | |||
--> | |||
{| | |||
|[[File:W220_fuel_gauge_level_sensor.png|350px]] | |||
| | |||
* 89/1 - Lever-type sensor | |||
* 89/2 - Potentiometer | |||
* 89/3 - Sliding contacts | |||
* B4 - Fuel level indicator sensor (except model 140) | |||
|} | |||
The fuel level indicator sensor (''also known as fuel gauge'') is installed in the fuel tank via a bayonet latch. | |||
The task of the sensor is determining the fuel level in the fuel tank. | |||
The fuel level sensor (B4) is a lever-type sensor with sliding contacts (potentiometer). | |||
The resistance of the fuel gage sensor (B4) is analyzed in the electronics of the fuel gage. | |||
Example model 208: Low resistance = Fuel tank empty, High resistance = Fuel tank full. | |||
In the event of a open circuit the fuel gauge in the instrument cluster indicates empty. The fuel reserve warning lamp (A1e4) does not light up. | |||
== Fuel tank pressure sensor (USA) == | == Fuel tank pressure sensor (USA) == | ||
Revision as of 16:58, 29 September 2021
Fuel tank
W220 has fuel tank (A2204707601) with 88 liter (23 galon) volume, unless vehicle has option code 282 (SKI-BAG) or 308 (REFRIGERATOR IN REAR) in which case the fuel tank (A2204707701) has value of 78 liters (20 galons).
Fuel tank (88l)
 |
 |
Fuel tank (78l)
 |
 |
Fuel reserve
The 88 liter tank uses 11 liters as a reserve. The 78 liter tank uses 10 liters as a reserve.
The reserve is what is left when the needle is pointed all the way down to the bottom of the yellow area and the fuel warning light comes on. Hence, the fuel gauge in the instrument cluster shows the fuel level minus the reserve volume.
Splash bowl
|
Shown on model 220:
|
|
|
Shown on model 211:
|
|
The swirl pot is mounted in the fuel tank. The task of the splash bowl is supplying the engine with fuel in the event of a low fuel level in the fuel tank and during lengthy cornering.
The fuel return flow stream flows out of the return flow nozzle (80/17) into the splash bolw at a high velocity when the fuel pump is operated. As a result, the fuel around the return flow nozzle (80/17) is also entrained and carried into the splash bowl.
Fuel level sensor
|
|
The fuel level indicator sensor (also known as fuel gauge) is installed in the fuel tank via a bayonet latch.
The task of the sensor is determining the fuel level in the fuel tank. The fuel level sensor (B4) is a lever-type sensor with sliding contacts (potentiometer).
The resistance of the fuel gage sensor (B4) is analyzed in the electronics of the fuel gage. Example model 208: Low resistance = Fuel tank empty, High resistance = Fuel tank full. In the event of a open circuit the fuel gauge in the instrument cluster indicates empty. The fuel reserve warning lamp (A1e4) does not light up.
Fuel tank pressure sensor (USA)
|
Shown on model 210:
|
The fuel tank pressure sensor is built into the hausing of the fuel gauge.
The task for the fuel tank pressure sensor is detecting the internal pressure of the fuel tank for the leak test of the fuel system.
The output signal depends on the pressure inside the tank and is transmitted to the engine control unit.