# US 2014/0197188 A1 · Ventilation device for the fuel system of a hybrid vehicle

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- Number: US 2014/0197188 A1
- Document ID: US20140197188A1
- Status: Published application
- Kind: A1
- Application number: 14/128,170
- Filed: 2012-06-18
- Published: 2014-07-17
- Earliest claimed: 2011-06-21
- Assignees: Inergy Automotive Systems Research
- Inventors: Bjorn Criel; Vincent Cuvelier; David Hill; Jules-Joseph Van Schaftingen
- Web page: https://patentgrep.com/patent/US20140197188A1

## CPC

- B60K 15/03504: {adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems}
- B60K 15/03519: {Valve arrangements in the vent line}
- F02M 25/089: {Layout of the fuel vapour installation}
- B60K 2015/03276: {Valves with membranes}
- B60K 2015/03296: {Pressure regulating valves}
- B60K 2015/03514: {with vapor recovery means}
- B60K 2015/03571: {Venting during driving}
- B60K 2015/03576: {Venting during filling the reservoir}
- Y10S 903/902: Prime movers comprising electrical and internal combustion motors
- Y10T 137/86324: Tank with gas vent and inlet or outlet
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A ventilation device including: a first enclosure including a first passage configured to be connected to a canister outlet and the atmosphere, and a normally closed shutter device configured to open to release the first passage; a second enclosure including a second passage configured to be connected to the canister inlet and a fuel tank, and a normally open shutter device configured to close to shut the second passage, the second passage being separate from and not in communication with the first passage; and a combined pressure/vacuum relief valve or OPR and UPR valve pair situated in or fastened to a bypass of the first passage configured to establish a connection between ends of the first passage when the shutter device is closed and when there is over- or under-pressure in the ends. A fuel system can include the device and a hybrid vehicle can include the fuel system.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

A ventilation device comprising:
a first enclosure including a first passage configured to be connected respectively to an outlet of a canister and to an atmosphere, and a normally closed shutter device configured to open to release the first passage;
a second enclosure including a second passage configured to be connected to an inlet of the canister and to a fuel tank, and a normally open shutter device configured to close to shut the second passage, the second passage being separate from the first passage and not being in communication therewith inside the device; and
a combined pressure/vacuum relief valve or an OPR and UPR valve pair situated in or fastened to a bypass of the first passage configured to establish a connection between ends of the first passage when the shutter device is closed and when there is over-pressure or under-pressure from end to end of the first passage.

### Claim 12 (depends on 11)

A device according to claim 11, wherein the enclosures are incorporated in a common housing.

### Claim 13 (depends on 12)

A device according to claim 12, wherein the enclosures include connections or endpieces at ends of the respective passages, the endpieces being integrally molded with the housing by injection molding a plastics material.

### Claim 14 (depends on 11)

A device according to claim 11, wherein the shutter devices include diaphragms.

### Claim 15 (depends on 11)

A fuel system fitted with a device according to claim 11, further comprising:
the canister having its outlet connected to one end of the first passage, the other end of the passage being in communication with the atmosphere; the connector being connected via its inlet to one end of the second passage; and
a fuel tank connected to the other end of the second passage, the fuel tank including a filler tube connected to the normally closed shutter device of the first passage to enable it to open on detecting a filling event.

### Claim 16 (depends on 15)

A fuel system according to claim 15, wherein the connection of the filler tube to the normally closed shutter device of the first passage takes place via a transmission line for transmitting a signal representing the filler tube being opened/closed.

### Claim 17 (depends on 16)

A fuel system according to claim 16, wherein the transmission takes place mechanically, and wherein the transmission line includes a cable that actuates the normally closed shutter device.

### Claim 18 (depends on 16)

A system according to claim 16, further comprising a connection line between the inlet of the canister and one end of the second passage, the connection line including a T-shaped portion or coupling/connection enabling a line coming from an engine vacuum to be tapped thereto, the connection line including a valve enabling the canister to be purged.

### Claim 19 (depends on 18)

A system according to claim 18, wherein the normally open shutter device of the second passage is in communication with the atmosphere, either directly or via an orifice communicating with the first passage.

### Claim 20 (depends on 15)

A hybrid vehicle comprising a fuel system according to claim 15.