# US 2014/0196695 A1 · Evaporative fuel treatment apparatus

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- Number: US 2014/0196695 A1
- Document ID: US20140196695A1
- Status: Published application
- Kind: A1
- Application number: 14/155,728
- Filed: 2014-01-15
- Published: 2014-07-17
- Earliest claimed: 2013-01-17
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Shuichi Aso
- Web page: https://patentgrep.com/patent/US20140196695A1

## CPC

- F02M 25/0854: {Details of the absorption canister}
- F02M 37/106: {the pump being installed in a sub-tank}
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

## Abstract

The evaporative fuel treatment apparatus includes: a fuel tank configured to store fuel for an engine; a sub-tank that communicates with the fuel tank; an adsorber provided inside the sub-tank and configured to adsorb evaporative fuel generated inside at least one of the fuel tank and the sub-tank; a purge mechanism configured to carry out purging for introducing evaporative fuel from the adsorber into the engine; and an in-tank fuel adjustment unit configured to adjust an amount of fuel inside the sub-tank in response to an operating state of the engine, the in-tank fuel adjustment unit including a fuel introduction pump configured to be able to introduce fuel from an outside of the sub-tank to an inside of the sub-tank, the fuel introduction pump being formed of a jet pump configured to be driven by at least part of fuel discharged from the fuel pump.

## Claims

### Claim 1

An evaporative fuel treatment apparatus comprising:
a fuel tank configured to store fuel for an internal combustion engine;
a sub-tank that communicates with the fuel tank;
a fuel pump configured to draw fuel that is supplied from the sub-tank to the internal combustion engine;
an adsorber provided inside the sub-tank and configured to adsorb evaporative fuel generated inside at least one of the fuel tank and the sub-tank;
a purge mechanism configured to carry out purging for introducing evaporative fuel from the adsorber into an intake pipe of the internal combustion engine; and
an in-tank fuel adjustment unit configured to adjust an amount of fuel inside the sub-tank in response to an operating state of the internal combustion engine, the in-tank fuel adjustment unit including a fuel introduction pump configured to be able to introduce fuel from an outside of the sub-tank to an inside of the sub-tank, the fuel introduction pump being formed of a jet pump configured to be driven by at least part of fuel discharged from the fuel pump.

### Claim 2 (depends on 1)

The evaporative fuel treatment apparatus according to claim 1, wherein
the in-tank fuel adjustment unit is configured to adjust the amount of fuel inside the sub-tank so as not to increase the amount of fuel on the condition that an increase in the temperature of the adsorber is required.

### Claim 3 (depends on 1)

The evaporative fuel treatment apparatus according to claim 1, wherein
the in-tank fuel adjustment unit is configured to adjust the amount of fuel inside the sub-tank so as to increase the amount of fuel on the condition that a decrease in the temperature of the adsorber is required.

### Claim 4 (depends on 1)

The evaporative fuel treatment apparatus according to claim 1, wherein
the fuel introduction pump is disposed inside the fuel tank.