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.