ARIA

ENGINE 132 FUEL LEVEL SENSOR The Fuel level sensor assembly consists of float and a sensor. Fuel level sensor assembly provides the signal to indicate the fuel level in the tank. As the float arm assembly moves with respect to the fuel level in tank, resistance at sensor harness varies accordingly. ROLL OVER VALVE The ROV is integrated with Tank unit. The ROV al- lows only the flow of fuel vapour and does not allow liquid fuel to flow from the vent line. . In case of a vehicle roll-over, the venting system is closed by the Roll-Over Valve which avoids any fuel leakage. I. TANK PRESSURE VALVE (TPV) The tank pressure valve is a two way valve provided to keep the pressure in the fuel tank within safe lim- its. The valve operates according to the pressure inside tank. 1. The tank pressure valve opens out when pres- sure differential occurs between the tank side and open side port and allows Vapour from the tank to the atmosphere. When the pressure inside the tank becomes positive and exceeds on estab- lished level of 1 – 2.5 Kpa valve opens out. 2. When the pressure in the fuel tank becomes neg- ative (vacuum) and reaches it specified value (1.6 Kpa vacuum) it opens the valve to let the outside air flow in the fuel tank.