Variable capacity, configurable hydrocarbon emissions trap

A system, comprising:

• a first vehicle comprising:
• a first fuel tank having a first volume;
• and
• a first vapor canister coupled to the first fuel tank and including a first series of fluidically coupled bleed element shells externally mounted to the first vapor canister, the first series of bleed element shells including at least a first bleed element shell housing absorbent material and a second bleed element shell that is empty;
• and
• a second vehicle comprising:
• a second fuel tank having a second volume larger than the first volume;
• and
• a second vapor canister coupled to the second fuel tank and including a second series of fluidically coupled bleed element shells externally mounted to the second vapor canister and each housing absorbent material.

A system, comprising:

• a vapor canister having a first port connecting to a fuel tank, a second port connecting to an engine intake, a third port connecting to atmosphere;
• and
• a bleed element cartridge holder external to the vapor canister with a series of molded, fluidically coupled bleed element shells,
• a first bleed element shell of the series of molded bleed element shells configured to fluidically couple to the third port of the vapor canister and a last bleed element shell of the series of molded bleed element shells configured to fluidically couple to a chamber inside the vapor canister.