Passive MISFUELING Protection Device System
Misfueling Protection Device
| ITEM | DESCRIPTION |
|---|---|
| 1 | Filler neck insert |
| 2 | Flap |
| 3 | Reset slots |
| 4 | Spigots |
| 5 | Reset tool |
| 6 | Spring |
The passive misfueling protection device system comprises a mechanically operated flap which is triggered when the smaller diameter filler nozzle tube, used on petrol pumps, is inserted in the filler neck. The shut off flap is actuated and blocks the sensor port on the fuel pump nozzle, causing it to automatically switch off. The shut off flap is locked in this position by a latch mechanism, once it has been activated.
A reset tool is provided and stored in the spare wheel well. The tool is used to reset the misfueling protection device if triggered. The tool is inserted into the filler opening as far as possible with the spigots pointing upper most. Once the 2 spigots on the tool are located in the slots it can be pulled outwards, releasing a latch and allowing the shut off flap to be opened by its own spring pressure.
The shut off flap is colored yellow so that it is clearly visible within the entrance of the fuel filler pipe when activated, the shut off flap has a 'Handbook' symbol on it.
A 25 mm diameter diesel fuel pump nozzle will not activate the misfueling protection device because the nozzle stops against 2 molded lugs. However, if a 21 mm diameter unleaded petrol pump nozzle is inserted into the housing, its smaller diameter allows it to pass the 2 molded lugs. The nozzle strikes 2 pins on the inside of the filler housing which move forward. This movement rotates the shut-off flap which is then held in place when the nozzle is removed by the latch mechanism.
Active Misfueling Protection Device System
Normal State
| ITEM | DESCRIPTION |
|---|---|
| 1 | Sensing tabs in normal state |
| 2 | Misfueling protection flap closed |
Open State
| ITEM | DESCRIPTION |
|---|---|
| 1 | Sensing tabs in open state |
| 2 | Misfueling protection flap open |
The misfueling protection device consists of a mechanically operated flap and 3 fuel nozzle sensing tabs. When a 25 mm diameter diesel fuel filler nozzle tube is inserted into the fuel filler pipe, the 3 sensing tabs depress releasing the flap into the open position. If a smaller 21 mm diameter filler nozzle tube, used on petrol pumps, is inserted in the fuel filler pipe, the 3 sensing tabs will not depress and the flap will not release, so this blocks the fuel nozzle from entering the filler pipe.
Adapter Funnel
An adaptor funnel is provided to allow the misfueling device to be temporarily overridden if:
- The vehicle travels to a market where differentiation of fuel nozzle size.
- The vehicle runs out of fuel and must be refilled at the road side using a reserve can
The adaptor funnel will be located either in the glovebox or in the luggage compartment alongside the tool kit.