# US 10,308,112 B2 · Saddle type fuel tank

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- Number: US 10,308,112 B2
- Document ID: US10308112B2
- Status: Granted
- Kind: B2
- Application number: 15/832,847
- Filed: 2017-12-06
- Published: 2018-06-14
- Granted: 2019-06-04
- Earliest claimed: 2016-12-08
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Kazuhiro Kobayashi; Tomoyuki Suuchi; Takeharu Yoshihashi
- Web page: https://patentgrep.com/patent/US10308112B2

## CPC

- B60K 15/073: Tank construction specially adapted to the vehicle (B60K15/077 takes precedence)
- B60K 15/03: Fuel tanks
- B60K 15/035: characterised by venting means
- F02M 37/00: Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- B60K 2015/03131: {Systems for filling dual tanks}
- B60K 2015/03144: {Fluid connections between the tanks}
- B60K 2015/03289: {Float valves; Floats therefor}
- B60K 2015/03296: {Pressure regulating valves}
- B60K 2015/03576: {Venting during filling the reservoir}
- B60K 2015/0467: {Fuel tanks with more than one filler pipe}
- 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

## Abstract

Provided is a saddle type fuel tank in which liquid fuel does not reach a canister through an exhaust passage immediately after full-tank refueling. The saddle type fuel tank includes a saddle type tank body and a full-tank regulating valve. The full-tank regulating valve includes a valve body, a float valve, a first hanging pipe communicatively connected to the valve body and having a first opening at a hanging end thereof, and a second hanging pipe communicatively connected to the valve body and having a second opening at a hanging end thereof. The first opening of the first hanging pipe is located at a height corresponding to a full-tank liquid level RA1_full in the first chamber. The second opening of the second hanging pipe is located at a height lower than that corresponding to a full-tank liquid level RA2_full in the second chamber.

## Claims

### Claim 1

A saddle type fuel tank comprising:
a saddle type tank body for storing fuel to be supplied to an internal combustion engine mounted on a vehicle, in a chamber having a saddle-shaped portion between a first chamber and a second chamber; and
a full-tank regulating valve communicatively connected to an exhaust passage for discharging vaporized fuel generated in the tank body to a canister and provided at the saddle-shaped portion in the chamber of the tank body, wherein the full-tank regulating valve comprises:
a valve body;
a float valve provided inside the valve body and operated to open or close a communication port of the exhaust passage based on a pressure difference between an internal pressure of the valve body and an internal pressure of the tank body;
a first hanging pipe communicatively connected to the valve body and extending to hang down offset toward the first chamber, and having a first opening at a hanging end thereof; and
a second hanging pipe communicatively connected to the valve body and extending to hang down offset toward the second chamber, and having a second opening at a hanging end thereof, and wherein
the first opening of the first hanging pipe is located at a height corresponding to a full-tank liquid level in the first chamber, and
the second opening of the second hanging pipe is located at a height lower than that corresponding to a full-tank liquid level in the second chamber and is provided with an on-off valve for opening and closing the second opening based on a height of a fuel liquid surface.

### Claim 2 (depends on 1)

The saddle type fuel tank according to claim 1, wherein
the valve body of the full-tank regulating valve is formed in a substantially cylindrical shape and is provided in the tank body so that an axial direction thereof is oriented substantially vertically, and
the first hanging pipe and the second hanging pipe are provided in a substantially two-pronged shape toward a lower end of the valve body.