More pressure means less vapor can be produced.

Hence LPG. It is a liquid only because it is under great pressure.

Only two things will determine if a gas turns to liquid, 1. pressure, and 2 temperature.

Space is irrelevant.

I didn't say anything about not turning to gas by changing space. I said the vapor pressure of a liquid--the pressure of the gas form of _that_ substance over the liquid form of that stubstance--is constant based on temperature and pressure of that gas and only that gas. But it takes more of a gas to achieve the same pressure in a greater volume. One atmosphere of gas in a 12 oz bottle is a hell of a lot less gas than one atmosphere in a room.

And as stated, it's all partial pressures. More Nitrogen pressure doesn't affect the pressure of gasoline vapor. LNG is liquid because it's under pressure. But it's not pressurized by adding a lot of air, it's pressurized by compressing it until it achieves liquid state.

Sorry guys. I thought the TCH pressurized the tank to reduce gasoline fumes. It doesn't.

I read the service manual. There is a pressure sensor that is used to make sure the system is airtight, but it doesn't appear to keep a positive pressure on the tank.

A charcoal filter is used to trap the fumes. The canister then feeds the fumes into the engine air intake to burn them off. Between "recycling" the fumes and keeping the system airtight, evaporative emissions are kept to "zero".

Sorry about my mistake.

good to know how it works. Thanks!

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