# US 12,215,656 B2 · Evaporative emissions control for a vehicle

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- Number: US 12,215,656 B2
- Document ID: US12215656B2
- Status: Granted
- Kind: B2
- Application number: 18/101,743
- Filed: 2023-01-26
- Published: 2023-06-08
- Granted: 2025-02-04
- Earliest claimed: 2016-12-22
- Assignees: Polaris Industries Inc.
- Applicants: Polaris Industries Inc.
- Inventors: Lindsay S B Edwards; Jonathon P. Graus; Nick Levin
- Web page: https://patentgrep.com/patent/US12215656B2

## CPC

- F02M 25/089: {Layout of the fuel vapour installation}
- B60K 5/04: with the engine main axis, e.g. crankshaft axis, transversely to the longitudinal centre line of the vehicle
- 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}
- F02B 75/18: Multi-cylinder engines (scavenging aspects F02B25/00)
- F02D 41/004: {Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position}
- F02M 25/0836: {Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold}
- F02M 25/0854: {Details of the absorption canister}
- F02M 25/0872: {Details of the fuel vapour pipes or conduits}
- B60K 2015/0358: {the venting is actuated by specific signals or positions of particular parts}
- B60Y 2200/20: Off-Road Vehicles
- F02B 2075/1808: {two}
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

A fuel system comprising a fuel tank, a mixing volume configured to mix fuel vapor and air, the mixing volume comprising an outlet configured to be fluidly coupled to an engine, and a fuel vapor line configured to fluidly couple the fuel tank to the mixing volume.

## Claims

### Claim 1

A vehicle comprising:
a frame;
a plurality of ground engaging members supporting the frame;
a powertrain assembly operably coupled to the ground engaging members, the powertrain assembly comprising:
an engine having a first cylinder and a second cylinder; and
at least one throttle body fluidly coupled to the first cylinder and the second cylinder;
an intake assembly coupled to the engine, the intake assembly comprising a first intake port and a second intake port;
an exhaust assembly coupled to the engine; and
a fuel system fluidly coupled to the engine, the fuel system including;
a first throttle body fluidly coupled to the first intake port,
a second throttle body fluidly coupled to the second intake port,
a mixing volume fluidly coupled to each of the first throttle body and the second throttle body,
a fuel tank, and the mixing volume and the fuel tank each fluidly coupled to each of the first throttle body and the second throttle body,
an evaporative canister fluidly coupled intermediate the fuel tank and the mixing volume
a first check valve operably coupled to the first cylinder and positioned intermediate the mixing volume and the first throttle body,
a second check valve operably coupled to the second cylinder and positioned intermediate the mixing volume and the second throttle body, and
a fuel vapor line fluidly coupling the fuel tank to the first check valve and the second check valve.

### Claim 2 (depends on 1)

The vehicle of claim 1, wherein the first and second check valves are positioned within approximately 150 millimeters of the first and second cylinders.

### Claim 3 (depends on 1)

The vehicle of claim 1, wherein the fuel system further includes a purge valve, the purge valve being positioned downstream of the fuel tank and upstream of the mixing volume and the mixing volume being positioned downstream of the fuel tank and the purge valve and upstream of the first and second check valves.

### Claim 4 (depends on 1)

The vehicle of claim 1, wherein the first and second check valves inhibit fluid communication between the first cylinder and the second cylinder.

### Claim 5 (depends on 1)

The vehicle of claim 1, further comprising a seat supported by the frame, the seat configured to support an operator, and each of the first check valve and the second check valve are positioned rearward of the seat.

### Claim 6 (depends on 1)

The vehicle of claim 1, wherein the mixing volume is positioned vertically higher than the first intake port.

### Claim 7 (depends on 1)

The vehicle of claim 1, wherein the fuel tank is positioned longitudinally forward of the mixing volume.

### Claim 8 (depends on 1)

The vehicle of claim 1, further comprising a purge valve positioned intermediate the evaporative canister and the mixing volume.

### Claim 9 (depends on 1)

The vehicle of claim 1, wherein the first check valve is positioned less than 150 millimeters from the first intake port.

### Claim 10 (depends on 9)

The vehicle of claim 9, wherein the first check valve is positioned between 25-75 millimeters from the first intake port.

### Claim 11

A vehicle comprising:
a frame;
a plurality of ground engaging members supporting the frame;
an operator area including at least one seat supported by the frame;
a powertrain assembly operably coupled to the ground engaging members, the powertrain assembly comprising an engine positioned generally rearward of the at least one seat, and an intake assembly coupled to the engine, the intake assembly comprising a first intake port and a second intake port; and
a fuel system fluidly coupled to the engine, the fuel system including:
a fuel tank positioned below the at least one seat and fluidly coupled to the intake assembly through a fuel delivery line,
a mixing volume fluidly coupled to the engine,
a fuel vapor line fluidly coupling the fuel tank to the mixing volume,
an evaporation canister positioned fluidly along the fuel vapor line,
a first check valve positioned fluidly intermediate the evaporation canister and the first intake port, and
a second check valve positioned fluidly intermediate the evaporation canister and the second intake port,
wherein mixing volume, the first check valve, and the second check valve are positioned rearward of the at least one seat.

### Claim 12 (depends on 11)

The vehicle of claim 11, wherein the evaporation canister is positioned under the fuel tank.

### Claim 13 (depends on 11)

The vehicle of claim 11, wherein the at least one seat includes a first seat and a second seat in side-by-side arrangement with the first seat, and the evaporation canister is positioned under the second seat and the fuel tank is positioned under the first seat.

### Claim 14 (depends on 11)

The vehicle of claim 11, wherein the mixing volume is positioned vertically higher than an uppermost surface of the engine.

### Claim 15 (depends on 11)

The vehicle of claim 11, wherein the mixing volume comprises an inlet fluidly coupled to the evaporative canister, a first outlet fluidly coupled to the first intake port and a second outlet fluidly coupled to the second intake port.

### Claim 16 (depends on 15)

The vehicle of claim 15, wherein the first check valve is positioned intermediate the mixing volume and the first intake port, and the second check valve is positioned intermediate the mixing volume and the second intake port.

### Claim 17 (depends on 11)

The vehicle of claim 11, wherein the first check valve is positioned less than 150 millimeters from the first intake port.

### Claim 18 (depends on 17)

The vehicle of claim 17, wherein the first check valve is positioned between 25-75 millimeters from the first intake port.

### Claim 19 (depends on 11)

The vehicle of claim 11, wherein at least a portion of the first check valve overlaps, in a vertical direction, at least a portion of the first intake port.

### Claim 20 (depends on 11)

The vehicle of claim 11, wherein a portion of the first check valve is positioned within a vertical envelope of the engine.

### Claim 21 (depends on 11)

The vehicle of claim 11, further comprising a mixing volume positioned intermediately the evaporative canister and the first check valve, and the mixing volume is positioned vertically higher than the fuel tank.