Evaporative Control System

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The purpose of the evaporative control system is to prevent the escape of fuel vapors into the atmosphere.

The system consists of purge lines leading from the tank to a liquid/vapor separator container at the right rear wheel housing. From separator container, a purge line leads to the activated charcoal filter in the engine compartment. The charcoal filter is connected with the air collector of the engine. When the vehicle is stopped and the engine is off, the fuel vapors are collected in the liquid vapor container. Part of the vapors condense and flow back to the fuel tank, excess vapors are absorbed and retained in the carbon filter until the engine is started again. The suction effect of the engine draws the fuel vapors in the purge lines and in the charcoal filter into the engine. As the fuel pump draws more fuel from the tank, the flow through the evaporative control system is reversed and air drawn into the fuel tank. The liquid/vapor separator container is also capable of compensating the fuel expansions of a completely filled fuel tank.

The Evaporative Control System is Maintenance-free.

The escape of gases and fuel from the the fuel filler neck is prevented by a sealed gas cap. The fuel tank has no direct ventilation to the atmosphere. In addition, the fuel filler neck is equipped with a check valve; this prevents the escape of fuel during refill at filling stations. A leaded fuel restrictor in the fuel filler neck prevents the inserting of a fuel filler nozzle not designed for unleaded fuel.