Onboard Refilling Vapor Recovery System

Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4, Sequoia, Sienna & 4Runner

On-board Refilling Vapor Recovery (ORVR) system is used to recover fuel vapors into EVAP canister that are generated during refueling. ORVR system consists of fuel inlet pipe, overfill check valve and EVAP canister. See Fig. 66 .

When fuel tank cap is removed, atmospheric pressure is applied to port "A" on overfill check valve. See Fig. 67 . Overfill check valve may also be referred to as ORVR-OCKV, fuel tank overfill check valve or fill check valve. When fuel flows into fuel inlet pipe and fuel tank, the pressure in fuel tank increases. Increased pressure in fuel tank causes valve "B" on overfill valve to open, allowing fuel vapors to flow into EVAP canister. When fuel tank is full, valve "C" closes, shutting off vapor flow to EVAP canister.

2001 ENGINE PERFORMANCE Theory & Operation

2003 Sienna Orvr Valve
Fig. 66: Identifying Typical On-board Refilling Vapor Recovery System Components (Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4, Sequoia, Sienna & 4Runner) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Echo 2001 Fuel Tank
Fig. 67: Locating Port & Valves On Overfill Valve, & Identifying Vapor Flow (Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius,

2001 ENGINE PERFORMANCE Theory & Operation

Do It Yourself Car Diagnosis

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Responses

  • pauli
    Where to find orvr valve on toyota yaris?
    7 years ago
  • pippin
    Where is the fuel tank located on a 2001 toyota echo?
    7 years ago
  • Kent
    Where is orvr02 camry?
    2 years ago
  • GABRIELA
    What is the fuel valve carried out on board?
    6 months ago

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