With a modern accelerator, Mondeo has become rather a rare guest of a gas station. Gasoline variants burn Euro-Super - diesel Mondeos take fuel from a diesel fuel dispenser.
The Mondeo's fuel tank is located in the rear floor area under the rear seat. It is a low-lying plastic molding piece. Models with petrol engines have a fuel capacity of approximately 59 liters, both diesel versions load about 56 liters on board. Carburetor engines have a fuel level sensor directly in the tank (fuel gauge) and fuel pump. 66 kW diesel version pours «juice» from the tank by means of a feed pump integrated into the plunger distribution pump, in the 85 kW diesel unit, two pumps take care of this: the first, as in the 66 kW, sits directly in the fuel pump, the second pump works as an electric feed pump and is located outside under the bottom of the car. They ensure the supply of diesel fuel and prevent the formation of a reduced pressure limit of 0.2 bar at the inlet of the fuel pump.
The Mondeo fuel tank does not have a threaded drain plug - therefore, before working on fuel tanks, it must be emptied through the vent hole.
Ingenious - ventilation system
Electric fuel suction compressor (feed pump) in gasoline models, it transports fuel through the gas pipeline system from the fuel tank to the engine. To «to tie» impurities and water condensate, a fuel filter sits in the supply pipe. All Mondeos with petrol engines «wear» the filter under the base of the load-bearing body near the right rear wheel, on the contrary, in diesel Mondeos it is located under the engine hood at the height of the right ledge of the suspension strut. Ventilation and airing basically ends in the filler neck of the tank. From here, the air that enters when filling the tank and in accordance with the current fuel consumption is removed. In order not to excessively pollute the environment with toxic fuel vapors, the filter binds the removed fuel vapors with activated carbon and sends it back to the intake tract when the engine is running.
Fuel system four-cylinder Mondeo
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1 - Fuel distribution pipe,
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6 - Drain pipeline,
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The main elements of the fuel system
Fuel Pump: The Mondeo has a silent electric submersible fuel pump. The pump and the sensor are a single element, unused fuel and gases through the pressure reducing valve in the pump housing are returned to the tank.
 Two in one: submersible fuel pump in versions with petrol engines. |
This valve maintains the injection system even when the ignition is switched off «gasoline pressure».
Fuel filter: in gasoline and diesel engines, it is installed before the injection system. Binds liquid and solid ballast substances from the fuel.
Activated carbon filter: located in the engine compartment. Binds fuel vapors from the tank. When the engine is running, the solenoid valve opens - the gases from this filter enter the intake system and mix with the fresh fuel mixture.
Basic connection diagram of activated carbon filter
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1 - Fuel tank,
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5 - Regeneration valve,
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