Evaporative Emissions: ORVR: Description

The ORVR (On-Board Refueling Vapor Recovery) system consists of a unique fuel tank, flow management valve (5), fluid control valve, one-way check valve and EVAP (vapor) canister (1). See Fig 1.

Fig 1: Identifying ORVR Components

Courtesy of DAIMLERCHRYSLER CORP.

1 - EVAP CANISTER

2 - NVLD FILTER

3 - NVLD PUMP

4 - VAPOR LINES

5 - FLOW VALVE

6 - TOP OF FUEL TANK)

A vapor line (4) and vent line (9) are also used to connect the fuel tank into the ORVR system. See Fig 2.

Fig 2: Top Of Fuel Tank

Courtesy of DAIMLERCHRYSLER CORP.

1 - FUEL PUMP MODULE LOCK RING	7 - SKID PLATE
2 - FUEL SUPPLY LINE	8 - FUEL FILL FITTING
3 - ELECTRICAL CONNECTOR	9 - FUEL VENT FITTING
4 - VAPOR LINE	-
5 - FUEL TANK MOUNTING STRAPS (2)	-
6 - FUEL PUMP MODULE ASSEMBLY	-