FR3103146A1 - SADDLE-TYPE VEHICLE AND METHOD OF USING A SADDLE-TYPE VEHICLE - Google Patents

Abstract

The present invention relates to a saddle-type vehicle (1) comprising a frame, which defines a front-rear axis (X) and a bottom-up axis (Z) perpendicular to said front-rear axis (X); a first fuel tank (2) and a second fuel tank (3); and a fluid line (6), which is interposed between said first fuel tank (2) and said second fuel tank (3). The saddle-type vehicle (1) further comprises control means (15) configured to establish a fluid connection through the fluidic line (6) between the first fuel tank (2) and the second fuel tank (3). ), so as to allow the passage of a fuel (20) through the fluidic line (6) when the vehicle (1) is in an upright operational position, in which the down-up axis (Z) is parallel to a vertical direction (H); or prevent the fluidic connection through the fluidic line (6) between the first and second fuel tanks (2; 3), so as to prevent the passage of fuel (20) through the fluidic line (6) when the vehicle ( 1) is in an inclined stop position, in which the down-up axis (Z) is inclined with respect to the vertical direction (H). Figure for the abstract: Fig. 6

Description

SADDLE-TYPE VEHICLE AND METHOD OF USING A SADDLE-TYPE VEHICLE

The present invention relates to a saddle-type vehicle comprising two fuel tanks and a method of using a saddle-type vehicle.

TECHNOLOGICAL BACKGROUND

Saddle type vehicles are known, comprising:

- a frame;

- a front wheel, which can be steered relative to the frame and which can rotate around its own first axis;

- a rear wheel, which is connected to the frame in a rotary manner around its own second axis;

- a heat engine, which is used to propel the vehicle by supplying the front and / or rear wheels with driving torque.

In addition, saddle type vehicles comprising:

- a side stand articulated on the frame; and

- foot plates or footrests.

Saddle type vehicles are also known, comprising a rear wheel and two front wheels, or a front wheel and two rear wheels, or two front wheels and two rear wheels.

In addition, saddle type vehicles having two front or rear wheels are also known, which are mounted so as to be inclined with respect to the frame.

Saddle type vehicles can be configured in different ways, for example as motorcycles, scooters or mopeds.

In general, saddle type vehicles include:

- a third longitudinal axis, which is oblique with respect to the first and second axes and directed parallel to a front-rear direction; and

- a fourth axis, which is perpendicular to the third axis and directed parallel to a down-up direction.

Saddle type vehicles can be arranged in:

- an inclined stop position, in which the fourth axis is inclined relative to a vertical direction; Where

- a straight operational position, in which the fourth axis is parallel to the vertical direction.

In the tilted stop position, the engine is stopped during a refueling operation, and is started during a preheating operation. At the same time, the side stand supports the saddle type vehicle.

In the upright operational position, the engine is started, and the side stand allows free movement of the saddle-type vehicle.

In addition, saddle type vehicles include at least one tank for storing fuel to be burned in the engine, and a pump for pumping fuel from the tank to the engine.

In detail, saddle type vehicles are known, comprising two fuel tanks, which are typically arranged symmetrically with respect to the third longitudinal axis of the vehicle, and extend at least partially under the saddle of the vehicle.

According to a known solution, the two fuel tanks are fluidly connected, and the pump is positioned on the fluid connection between the two tanks, so as to suck the fuel from the two tanks.

In more detail, the pump is physically placed between the two reservoirs, under the saddle of the vehicle, and at a front part of the saddle, according to the normal direction of movement of the vehicle.

For this reason, in known saddle type vehicles, the saddle is typically configured with a distinguishable protrusion at its front part, under which the pump is positioned.

The protrusion extends substantially along the fourth axis of the vehicle.

When the vehicle is in its upright operational position, the fuel free surfaces inside the two tanks are in an initial position.

In this condition, the free surfaces of the fuel are substantially parallel to the ground, and perpendicular to the fourth axis of the vehicle.

With specific reference to saddle-type vehicles designed for off-road use, the user typically straddles the vehicle while standing on the foot plates, in order to better control the vehicle.

In order to ensure safe riding conditions and vehicle stability, it is desirable to increase the freedom of movement of the driver and lower the center of gravity of the vehicle.

In detail, the previously described configuration of the saddle in off-road saddle type vehicles can limit movements of the driver standing on the footplates, due to the protrusion of the saddle.

In addition, the position of the pump and the corresponding projection of the saddle leads to a higher barycenter of the vehicle, which is to the detriment of the stability of the vehicle.

There is therefore a need in the industry to provide a saddle-type vehicle comprising two reservoirs and a pump, positioned so as to interfere as little as possible with the movements of the driver, to ensure safe driving conditions for the driver. the driver.

In addition, the two fuel tanks are each provided with a fuel filler hole, which is closed by means of a tank closure member, i.e. a fuel filler cap.

In addition, the fuel tanks are normally ventilated using known ventilation means, so as to prevent the development of a vacuum or excessive pressure, as a result of tank emptying or filling operations, respectively.

These ventilation means generally consist of breather pipes, each having a first end positioned inside the respective tank, optionally above the free surface of the fuel, and a second end positioned outside the respective tank.

In this way, the breather hoses connect the air inside the tank with the air outside the tank.

Accordingly, in known saddle type vehicles comprising at least two fuel tanks, the operation of refueling can generate the risk of fuel overflowing from the tanks.

In fact, when the vehicle is in the tilted stop position, it is possible to identify a higher tank and a lower tank among the two fuel tanks, and the free surfaces of the fuel inside the tanks cannot be identified. are then more perpendicular to the fourth axis of the vehicle, but still parallel to the ground.

In detail, in this state, the free surfaces of the fuel inside the tanks are closer to the first ends of the breather pipes than in their initial position, and therefore there is a risk that the fuel could leak out of the tanks. tanks.

When a certain amount of fuel has entered the higher fuel tank, it flows to the lower tank by gravity through the fluid connection between the two tanks.

In the event that the lower fuel tank is already filled with fuel, its maximum allowable capacity may be exceeded, and a certain amount of fuel may leak out of the lower tank, through its breather pipe, as a result of the fact that the free surfaces of the fuel inside the tank are closer to the respective first end of the breather pipe positioned inside the tank.

It is generally desirable to maximize the filling of the fuel tanks, so as to extend the range of the vehicle, in particular with regard to off-road use of the vehicle.

However, since during refueling operations the insertion of fuel into the higher tank corresponds to the flow of fuel to the lower tank, filling the higher tank may be limited by the risk of overflow from the tank. from the lower tank, and the resulting dispersion of fuel into the environment through the breather pipe.

In this condition, the filling of the tanks may not be optimum, thereby deteriorating the performance of the vehicle.

In addition, fuel overflow from the tanks can occur not only during refueling operations, but any time the vehicle is in the tilted stop position, for example during vehicle preheating operations or when the vehicle is parked.

Therefore, there is a need in the industry to prevent fuel overflow from both tanks when the vehicle is in the tilted stop position, while ensuring an optimum fill level of both fuel tanks.

DESCRIPTION OF THE INVENTION

It is an object of the present invention to provide a saddle-type vehicle, making it possible to satisfy at least one of the above-mentioned needs in a simple and economical manner.

This goal is achieved by means of a saddle-type vehicle. Said saddle-type vehicle comprises a frame, which defines a front-rear axis and a bottom-up axis perpendicular to said front-rear axis; a first fuel tank and a second fuel tank; and a fluidic line, which is interposed between said first fuel tank and said second fuel tank; characterized in that it further comprises control means configured to: establish a fluidic connection through said fluidic line between said first fuel tank and said second fuel tank, so as to allow the passage of fuel therethrough said fluidic line when, in use, said vehicle is in an upright operational position, wherein said down-up axis is parallel to a vertical direction; or preventing the fluidic connection through said fluidic line between said first and second fuel tanks, so as to prevent passage of said fuel through said fluidic line when, in use, said vehicle is in an inclined stop position, in which said bottom-up axis is inclined relative to said vertical direction.

Said saddle-type vehicle can further be improved according to various advantageous embodiments.

According to one embodiment, said control means may comprise a valve, which is positioned on said fluidic line; said valve controllable to assume: an open configuration in which it permits, in use, the passage of said fuel through said fluidic line, when said vehicle is in said upright operational position; or a closed configuration, in which it prevents, in use, the passage of said fuel through said fluidic line, when said vehicle is in said inclined stop position.

According to one embodiment, said valve may be a valve which can be actuated electrically, in particular a solenoid valve.

According to one embodiment, said saddle-type vehicle can further comprise an engine, which can be controlled to assume a started state or a stopped state; characterized in that said control means may further comprise: a plurality of sensors, which are used to collect at least first data relating to the state of said motor and at least second data relating to the inclination of said down-up axis by relative to said vertical direction; and a control unit, which is programmed to receive, in use, at least said first and second data, and to instruct said valve to assume said open configuration or said closed configuration based on said first and second data.

According to one embodiment, said saddle-type vehicle may further comprise an ignition switch for instructing said engine to assume said started state or said stopped state; and a side stand, which can be selectively adjusted in an activated configuration, in which it supports, in use, said vehicle in said inclined stop position, or in a deactivated configuration, in which it leaves free, in use, the movement of said vehicle in said upright operational position; characterized in that said sensors can collect respectively said first data from said ignition switch and said second data from said sidestand.

According to one embodiment, said inclined stop position may correspond, in use, to at least one operation for refueling said vehicle or to an operation for preheating said vehicle; said engine being, in use, in said stopped state and said sidestand being, in use, in said activated configuration when said vehicle is, in use, in said refueling operation; said engine being, in use, in said started state and said sidestand being, in use, in said activated configuration when said vehicle is, in use, in said preheating operation; said engine being, in use, in said started state and said side stand being, in use, in said deactivated configuration when said vehicle is, in use, in said upright operational position; said valve being set, in use, to said closed configuration when said vehicle is, in use, in said refueling operation or in said preheating operation; said valve being set, in use, to said open configuration when said vehicle is, in use, to said right operational opposition.

According to one embodiment, said valve may be a one-way valve, which can be controlled on the basis of a pressure difference between two cross sections of said fluidic line; said two cross sections being arranged on opposite expanses of said fluid line relative to said valve; one of said cross sections being in fluid communication with said first fuel tank, and the other of said cross sections being in fluid communication with said second fuel tank; said valve being in said open configuration when said pressure difference is less than a value of a threshold, and being in said closed configuration when said pressure difference is greater than said threshold value.

According to one embodiment, said saddle-type vehicle may further comprise a connection line, which establishes an additional permanent fluid connection between said first and second fuel tanks; said connection line comprising a first end and a second end, which are positioned within the first and second fuel tanks, respectively; said connection line being adapted to discharge into said second fuel tank fuel overflowing from said first fuel tank; and means for ventilating said second fuel tank, being adapted to directly ventilate said second fuel tank and said first fuel tank through said connection line; said first and second ends being positioned, in use, above said free surfaces of said fuel within respective first and second tanks at least when, in use, said vehicle is in said upright operational position.

According to one embodiment, said saddle-type vehicle may further comprise a saddle; and a single pump; said first and second reservoirs being arranged respectively on a first and a second side, opposite to each other with respect to said front-rear axis, said single pump being arranged inside one of said first and second reservoirs fuel and under said saddle; said side stand being operatively connected to said first side of said vehicle.

According to one embodiment, said single pump can be arranged on said first side.

According to one embodiment, said single pump can be arranged on said second side.

This object is also achieved by means of a saddle-type vehicle comprising a first and a second fuel tank; a saddle; a single pump; and a fluidic line, which extends between said first and second fuel tanks from each other; characterized in that said single pump is arranged inside one of said first and second fuel tanks along said fluidic line and below said saddle.

Said saddle-type vehicle can further be improved according to various advantageous embodiments.

According to one embodiment, said first and second fuel tanks can be arranged on said vehicle in a symmetrical manner with respect to a front-rear axis of said vehicle.

According to one embodiment, said first and second fuel tanks can each comprise at least one respective filler cap, and said saddle can be arranged under said at least one filler cap with respect to a bottom-top axis of said vehicle.

According to one embodiment, said pump and said saddle can be offset along an additional axis, which is perpendicular to said front-rear axis and to said bottom-up axis.

According to one embodiment, said pump can extend along said bottom-up axis between a first height and a second height, greater than said first height; and said saddle extends along said bottom-up axis between a third height and a fourth height, greater than said third height; said second height being less than said fourth height.

According to one embodiment, said first height may be less than said third height.

The present invention also relates to a method of using a saddle-type vehicle. The method of using a saddle-type vehicle having a first fuel tank and a second fuel tank is characterized by comprising the steps of: i) establishing a fluid connection through a fluid line of said vehicle between said first and second fuel tanks when said vehicle is in an upright operational position, wherein a bottom-up axis of said vehicle is parallel to a vertical direction; said fluidic line being interposed between said first fuel tank and said second fuel tank; or ii) preventing fluid connection through said fluid line between said first and second fuel tanks when said vehicle is in an inclined stop position, wherein said down-up axis is inclined relative to said vertical direction.

The method can further be improved according to various advantageous embodiments.

According to one embodiment, the method may comprise the further step of iii) adjusting a valve to an open configuration, in which it allows the passage of said fuel through said fluidic line when said vehicle is in said upright operational position; or in a closed configuration, in which it prevents the passage of said fuel through said fluidic line, when said vehicle is in said inclined stop position.

According to one embodiment, the method can comprise the additional steps consisting in: iv) collecting at least a first piece of data concerning the state of an engine of said vehicle and at least one second piece of data concerning the inclination of said down-up axis by with respect to said vertical direction by means of a plurality of sensors arranged on said vehicle; v) controlling said motor to assume a started state or a stopped state; vi) receiving at least said first and second data, and instructing said valve to assume said open configuration or said closed configuration based on said first and second data.

According to one embodiment, said step may comprise the steps of: vii) setting an ignition switch of said vehicle in a starting position, in which it sets said engine in said started state or in a stopped position, in wherein it sets said engine in said stopped state; viii) adjusting said side stand of said vehicle in an activated configuration, in which it supports said vehicle when it is in said inclined stop position, or in a deactivated configuration, in which it leaves free movement of said vehicle when is in said upright operational position; ix) collecting at least first data from a first sensor, which detects the position of said ignition switch of said vehicle; and x) collecting at least said second data from a second sensor, which detects the configuration of said vehicle sidestand.

According to one embodiment, said step iii) may comprise the additional steps consisting in: xi) adjusting said valve in said closed configuration when said vehicle is in an operation of refueling from said inclined stop position with said engine in said stopped state and said sidestand in said activated configuration; xii) setting said valve in said closed configuration when said vehicle is in a preheating operation from said tilted stop position with said engine in said started state and said sidestand in said activated configuration; and xiii) adjusting said valve to said open configuration when said vehicle is in said upright operational position with said engine in said started state and said sidestand in said deactivated configuration.

According to one embodiment, said step iii) can comprise the steps consisting in xiv) controlling said valve by means of a pressure difference between two cross sections of said fluidic line; said cross sections being arranged on respective opposing extents of said fluid line relative to said valve; said step xiv) comprising the substep consisting in: xv) adjusting said valve in said open configuration when said pressure difference is less than a threshold value; and xvi) adjusting said valve to said closed configuration when said pressure difference is greater than said threshold value; said pressure difference being less than said threshold value when said vehicle is in said upright operational position and being greater than said threshold value when said vehicle is in said inclined stop position.

According to one embodiment, the method may comprise the additional steps of: xvii) establishing an additional permanent fluid connection between said first and second fuel tanks via a connection line; said connection line comprising a first end and a second end, which are positioned respectively inside said first and second fuel tanks; and xviii) discharging fuel overflowing from said first fuel tank through said connection line into said second fuel tank when said vehicle is in said tilted stop position.

According to one embodiment, the method can comprise the additional steps consisting in xix) ventilating said second fuel tank by means of ventilation means; and xx) venting said first fuel tank through said connection line; said first and second ends being positioned above said free surfaces of said fuel within the respective first and second tanks at least when said vehicle is in said upright operational position.

Two preferred non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a top view of a saddle type vehicle according to a first embodiment of the present invention with parts removed for clarity;

Figure 2 is a side view of the saddle type vehicle of Figure 1 with parts removed for clarity;

Figure 3 is an enlarged perspective view of the tanks of the saddle type vehicle of Figures 1 and 2;

Figure 4 is an enlarged perspective view of some components of the saddle-type vehicle of Figures 1 and 2, the tanks being only partially drawn;

Figure 5 is a diagram of the tanks of the saddle-type vehicle of Figures 1 to 4, showing the fuel levels inside the tanks in an upright position of the saddle-type vehicle and in an inclined position of the type vehicle. saddle, respectively;

Figure 6 is a diagram of the tanks of the saddle-type vehicle of Figures 1 to 4, showing the fuel levels inside the tanks in an upright position of the saddle-type vehicle and in an inclined position of the type vehicle. saddle, respectively;

Figure 7 is a partial cross-sectional view on an even larger scale of the saddle-type vehicle of Figures 1-6 taken along line VII-VII of Figure 1 with parts removed for clarity;

Fig. 8 is a diagram of the tanks of a saddle-type vehicle according to a second embodiment of the present invention, showing the fuel levels inside the tanks in the tilted position of the saddle-type vehicle; and

Fig. 9 is a diagram of the tanks of the saddle-type vehicle according to a third embodiment of the present invention, showing the fuel levels inside the tanks in an upright position of the saddle-type vehicle and in an upright position of the saddle-type vehicle. inclined saddle type vehicle, respectively;

Fig. 10 is a diagram of the tanks of the saddle-type vehicle according to a third embodiment of the present invention, showing the fuel levels inside the tanks in an upright position of the saddle-type vehicle and in an upright position of the saddle-type vehicle. inclined saddle type vehicle, respectively.

Referring to Figures 1 and 2, reference numeral 1 indicates a saddle type vehicle.

In the embodiment shown, the saddle type vehicle is a motorcycle. Alternatively, the saddle type vehicle is a scooter or moped.

In the remainder of the present description, expressions such as "above", "before", "under", "below" and the like are used with reference to a normal direction of progress and to an operational position of the vehicle 1 shown in the attached figures.

In particular, in Figures 1 and 2, arrows L, R, F, B, U, D respectively indicate directions to the left, to the right, to the front, to the rear, to the top and to the down, relative to the normal direction of travel and the operational position of the vehicle 1.

As shown in Figure 1, the vehicle 1 substantially comprises:

- a frame 50 with a front end 51 and a rear end 52;

- a first fuel tank 2 and a second fuel tank 3; and

- a fluid line 6, which extends between the reservoir 2 and the reservoir 3.

In detail, the frame 50 houses the reservoirs 2, 3 and the fluidic line 6.

Vehicle 1 further comprises:

- A front-rear axis X, which is directed parallel to a front-rear direction of the vehicle 1;

- a bottom-up axis Z, which is perpendicular to the X axis and directed parallel to a bottom-up direction of the vehicle 1; and

- a left-right axis Y, which is perpendicular to the X and Z axes and directed parallel to a left-right direction of the vehicle 1.

The X, Y and Z axes are integral with vehicle 1, and form the vehicle coordinate system.

The X axis is an axis of symmetry of vehicle 1.

It is also possible to define a vertical direction H, which is perpendicular to the ground and along which gravity acts.

In addition, vehicle 1 includes:

- a saddle 7, which is connected to the frame 5 and is used as a seat by the driver and / or a passenger;

a heat engine 5, which is housed in the frame 50 and can be controlled to assume a started state or a stopped state; and

- First and second lateral sides 1a, 1b, opposite to each other with respect to the X axis.

In detail, the tanks 2, 3 store the fuel 20 intended to be burned by the engine 5.

In the embodiment shown, the reservoirs 2, 3 extend at least in part under the saddle 7, and are arranged symmetrically with respect to the X axis (Figures 1 and 2).

In detail, the tank 2 is arranged at the side 1a of the vehicle 1, and the tank 3 is arranged at the level of the side 1b of the vehicle 1.

The fuel 20 inside the tanks 2, 3 has respective free surfaces 21, which are perpendicular to the direction H.

The reservoirs 2, 3 overlap at least partially with each other along the Z axis, as shown in Figure 7.

In addition, the saddle 7 includes an upward surface 7a and a downward surface 7b, which are opposed along the Z axis and strongly joined to each other on a common front edge 7c ( figures 2 and 7).

The surface 7b comes into contact with the frame 50, to which it is attached.

The surface 7a comprises a convex part 100 and a concave part 101.

The concave part 101 defines a seat for the driver.

In detail, the part 101 in turn comprises two expanses 102, 103, which are respectively descending and ascending with respect to the Z axis while progressing from the front end 51 towards the rear end 52.

In particular, part 100 and extent 102 are both descending relative to the Z axis progressing from the front end 51 towards the rear end 52, and part 100 is less steep than the extent 102 .

In addition, the width of the surface 7a along the Y axis increases as it progresses from the front end 51 to the rear end 52 (Fig. 1).

Vehicle 1 can be adjusted in:

- an inclined stop position, in which the Z axis is inclined relative to the H direction; Where

- a straight operational position, in which the Z axis is parallel to the H direction.

For example, the vehicle 1 is in the tilted stop position during preheating or refueling operations, or when parked.

Furthermore, in the inclined stop position, the vehicle 1 cannot move in the direction of travel.

Conversely, vehicle 1 is in the upright operational position as it travels along the direction of travel.

In the tilted stop position and in the upright operational position, the X axis is directed parallel to the ground.

In detail, the vehicle 1 could also be set in an inclined operational position, in which the Z axis is slightly inclined with respect to the H direction, for example when the vehicle 1 is moving along a curved path.

The vehicle 1 could also be placed in a straight stop position, in which the Z axis is parallel to the H direction, for example when stopping at a red light.

In addition, the tanks 2, 3 include respective fuel filler holes, not shown, for the insertion of fuel 20.

Accordingly, as shown in Figures 1, 3, 5 and 6, the tanks 2, 3 are provided with respective fuel filler caps 12, 13, which can be selectively set in an open position or in a closed position, to so as to respectively allow the insertion of the fuel 20 inside the tanks 2, 3 from the outside through respective fuel filler holes and to protectively cover the fuel filler holes.

In the illustrated embodiment, the caps 12, 13 and the respective fuel filler holes are arranged on top of the respective tanks 2, 3.

Further, as illustrated in Figures 5, 6, the tanks 2, 3 are provided with respective breather pipes 40, 41 as ventilation means having:

- respective inner ends 40a, 41a, which are positioned inside the respective tanks 2, 3; and

- Respective outer ends 40b, 41b, which are positioned outside the respective reservoirs 2, 3, preferably below the respective first ends 40a, 41a.

The first ends 40a, 41a are positioned so as to be above the free surface 21 of the fuel 20 when the vehicle 1 is in the upright / stop operational position, the refueling operations are completed, and the fuel excess 20 was discharged through the ends 40b, 41b.

In detail, the breather pipes 40, 41 may be integral with the respective plugs 12, 13.

The dimensions and proportions of the breather pipes 40, 41 and of the plugs 12, 13 shown in the appended figures should be considered as purely indicative and not limiting.

When the plugs 12, 13 are in the closed position, the breather pipes 40, 41 prevent the development of a vacuum or excessive pressure inside the reservoirs 2, 3 as a result of draining operations and filling the reservoirs 2, 3, respectively.

In addition, in the embodiment shown, the plugs 12, 13 are at a higher level than the surface 7a of the saddle 7 with respect to the Z axis (Figure 2).

In addition, when the vehicle 1 is in the upright operational position (Fig. 5), it is possible to define a distance d1 along the Z axis between a free surface 21 of the fuel 20 and respective ends 40a, 41a for a given amount of fuel 20.

When the vehicle 1 is in an inclined stop position, it is possible to identify a higher tank 3 and a lower tank 2 with respect to the Z axis (FIG. 6).

In addition, in this state, the free surfaces 21 of the fuel 20 inside the tanks 2, 3 are not perpendicular to the Z axis as in the right operational position, but always perpendicular to the H direction (Figure 6). .

Therefore, when the vehicle 1 is in the inclined stop position, the fuel 20 inside the tanks 2, 3 approaches the ends 40a, 41a of the respective breather pipes 40, 41.

In other words, in this state, a distance d2 of the free surface 21 of the lower tank 2 from the end 40a along the direction H is less than the distance d1 for the given amount of fuel 20 contained in the tanks. reservoirs 2, 3 (figure 6).

In detail, a distance d2 equal to zero corresponds to a state of overflow or incipient overflow of the fuel 20 from the tanks 2, 3.

Therefore, it is possible to set a maximum allowable capacity of the tanks 2, 3 as the maximum amount of fuel that can be stored inside the tanks 2, 3, as a consequence of the inclination of the free surfaces 21 of the fuel. 20, when the vehicle 1 is in the inclined stop position and for a given angle between the Z axis and the H direction.

The maximum admissible capacity corresponds to the minimum admissible value of the distance d2.

In other words, when the vehicle 1 is in the stop position tilted at a given angle between the Z axis and the H direction and the tanks 2 or 3 are filled to the maximum allowable capacity, any amount of fuel 20 entry into tank 2 or 3 can cause fuel 20 to overflow from breather pipes 40, 41.

As shown in Figure 1, the vehicle 1 further comprises:

- an ignition switch 9, connected to the frame 50 and operable to set the engine 5 in the started state or in the stopped state; and

- a side stand 10, which can be selectively adjusted in an activated configuration (shown in figure 2 and shown in figure 1 as a continuous line), in which it supports the vehicle 1 in the position d 'inclined stop, or in a deactivated configuration (shown in FIG. 1 in the form of broken lines), in which it leaves free the movement of the vehicle, when it is in the upright operational position.

The side stand 10 is articulated on the frame 50.

In the embodiment shown, the side stand 10 is articulated on the side 1a of the vehicle 1.

In addition, in the activated configuration, the side stand 10 is lowered relative to the frame 50 and extends substantially transversely to the X axis.

In the deactivated configuration, the side stand 10 is retracted and extends substantially parallel to the X axis towards the frame 50.

The ignition switch 9 is operated by means of a key, not shown, which can be inserted and turned in a keyhole of the ignition switch 9 between an angular start position and an angular stop position.

The starting angular position corresponds to the started state of the motor 5, while the stop angular position corresponds to the stopped state of the motor 5.

Alternatively, the ignition switch 9 is a power button.

In detail, when the vehicle 1 is in the inclined stop position, and specifically during refueling operations, the engine 5 is in the stopped state and the sidestand 10 is in the activated configuration.

When the vehicle 1 is in the inclined stop position, and specifically during refueling operations, the engine 5 is in the stopped state and the sidestand 10 is in the activated configuration.

On the contrary, when the vehicle 1 is in the upright operational position, the engine 5 is in the started state and the sidestand 10 is in the deactivated configuration.

When the vehicle 1 is in the inclined operational position or in the upright stop position, the engine 5 is in the running state and the sidestand 10 is in the deactivated configuration.

Advantageously, the vehicle 1 further comprises control means 15 configured to establish a fluidic connection through the fluidic line 6 between the tank 2 and the tank 3 so as to allow the passage of fuel 20 through the fluidic line 6. when the vehicle 1 is in the upright operational position, or to prevent the fluid connection through the fluidic line 6 between the tank 2 and the tank 3 so as to prevent the passage of fuel 20 through the fluidic line 6 when the vehicle 1 is in the tilted stop position.

In detail, the control means 15 comprise a valve 8, which is positioned on the fluidic line 6.

Valve 8 can selectively take:

an open configuration, in which it allows the fuel 20 to pass through the fluidic line 6; Where

- A closed configuration, in which it prevents the passage of fuel 20 through the fluidic line 6 (Figures 1, 4 to 6).

In more detail, in the embodiment shown, said valve 8 is an electrically actuable valve, such as a solenoid valve.

In addition, the control means 15 comprise (Figures 1, 5 and 6):

- sensors 17, 18 (Figure 1), in the embodiment shown electrical switches, which collect at least a first datum concerning the state of the motor 5 and a second datum concerning the inclination of the axis Z with respect to in the vertical direction H; and

- a control unit 11, which is programmed to receive first and second data and to instruct the valve 8 to take the open configuration or the closed configuration on the basis of the first and second data.

The valve 8 is normally set in the closed configuration, and can be adjusted by the control unit 11 in the open configuration.

In the embodiment shown, a sensor 17 generates the first datum associated with the angular start / stop position of the ignition switch 9, and a sensor 18 generates the second datum associated with the on / off configuration of the side stand 10. .

The sensor 17 provides the control unit 11 with the first data relating to the state of the engine 5, and the sensor 18 provides the control unit 11 with the second data relating to the position of the vehicle 1.

In detail, during operations of parking / refueling the vehicle 1, the control unit 11 receives the first data identifying that the engine 5 is in the stopped state, and the second data identifying that the side stand 10 is in the activated configuration, and sets valve 8 in the closed configuration.

In addition, in operations of preheating the vehicle 1, the control unit 11 receives the first data identifying that the engine 5 is in the started state and the second data identifying that the side stand 10 is in the activated configuration. , and sets valve 8 to the closed configuration.

On the contrary, when the vehicle 1 is in the upright operational position, the control unit 11 receives the first datum identifying that the engine 5 is in the started state and the second datum identifying that the side stand 10 is in the running state. configuration disabled, and sets valve 8 to the open configuration.

Similarly, when the vehicle 1 is in the stop position tilted along a forward curved path or in the straight operational position, the control unit 11 receives the first datum identifying that the engine 5 is running. in the switched on state and the second datum identifying that the side stand 10 is in the deactivated configuration, and maintains the valve 8 in the open configuration.

Advantageously, the vehicle 1 comprises a single pump 4 (shown only diagrammatically), which is arranged inside one of the reservoirs 2, 3 along the fluidic line 6 and under the saddle 7.

In the embodiment shown, the pump 4 is arranged inside the reservoir 2, and the fluidic line 6 extends from the reservoir 3 to the pump 4 (Figures 1, 5 and 6).

In detail, the pump 4 comprises two suction inlets 4a, 4b and a distribution outlet 4c.

A first (4a) of the suction inlets 4a, 4b is positioned at the connection between the pump 4 and the fluidic line 6; the other (4b) is positioned at the level of tank 2.

In addition, the pump 4 and the saddle 7 are offset along the Y axis (Figure 1).

The pump 4 extends along the Z axis between a first height z1 and a second height z2, greater than the first height z1 (Figures 2, 4).

The saddle 7 extends along the axis Z between a third height z3 and a fourth height z4, greater than the third height z3 (FIG. 2).

In detail, the height z4 corresponds to the highest point of the surface 7a and the height z3 corresponds to the lowest point of the surface 7b, with respect to the axis Z.

In the embodiment shown, the second height z2 is less than the fourth height z4 and the first height z1 is less than the third height z3.

In use, when the vehicle 1 is in the inclined stop position and during refueling operations, the engine 5 is in the stopped state and the sidestand 10 is in the activated configuration.

In this condition, the sensor 17 of the ignition switch 9 sends the first data to the control unit 11 regarding whether the engine 5 is in the stopped state, and the sensor 18 sends the second data to the unit. command 11 concerning the fact that the side stand 10 is in the activated configuration.

The control unit 11 receives the first and second data and sets the valve 8 in the closed configuration.

In detail, when a certain amount of fuel 20 has entered the higher tank 3 through the cap 13, it will flow to the lower tank 2 through the fluid connection 6, due to gravity.

Since the valve 8 is in the closed configuration, the fluid connection between the tanks 2, 3 through the fluid line 6 is prevented, and the fuel 20 cannot reach the lower tank 2.

Accordingly, even in the case where the lower tank 2 is at the maximum allowable capacity, the overflow of fuel 20 from the breather pipe 40 is substantially avoided.

In addition, since the valve 8 is in the closed configuration, filling the tanks 2, 3 is possible only by inserting fuel 20 into each of the tanks 2, 3 individually.

When the vehicle 1 is in the inclined stop position, and during preheating operations, the engine 5 is in the started state and the side stand 10 is in the activated configuration.

The control unit 11 receives the first data from the sensor 17 and the second data from the sensor 18, and sets the valve 8 to the closed configuration.

In this condition, the pump 4 sucks fuel only from the tank 2 through the suction inlet 4b.

When the vehicle 1 is in the upright operational position, the engine 5 is set in the started state and the sidestand 10 is in the deactivated configuration.

The control unit 11 receives the first data from the sensor 17 and the second data from the sensor 18, and sets the valve 8 to the open configuration.

Therefore, the pump 4 sucks fuel directly from the tank 2 through the suction inlet 4b and from the tank 3 via the fluid line 6 through the suction inlet 4a.

Then, the pump 4 distributes the sucked fuel 20 to the engine 5 through the distribution outlet 4c.

In addition, when the vehicle 1 is parked, the engine 5 is in the stopped state and the side stand 10 is in the activated configuration.

The control unit 11 receives the first and second data and sets the valve 8 in the closed configuration.

In addition, when the vehicle 1 is set in the inclined operational position or in the upright stop position, the engine 5 is started and the sidestand 10 is in the deactivated configuration.

The control unit 11 receives the first and second data and maintains the valve 8 in the open configuration.

Referring to Figure 8, reference numeral 1 'indicates a saddle-type vehicle according to a second embodiment of the present invention.

Vehicle 1 ’is similar to vehicle 1 and will only be described below to the extent that it differs from it; corresponding or equivalent parts of the vehicle 1, 1 ’will, where possible, be indicated by the same reference numbers.

In particular, vehicle 1 ’differs from vehicle 1 in that valve 8’ is an automatic valve and is placed on fluid line 6 between tanks 2 and 3 (Figure 8).

Furthermore, vehicle 1 ’differs from vehicle 1 in that control means 15’ do not include control unit 11 and sensors 17, 18.

In more detail, the valve 8 'is a one-way valve and is configured to prevent the passage of fuel 20 from the tank 3 to the tank 2 through the fluidic line 6 when in a closed configuration, or to allow the passage of fuel. fuel passage 20 through fluid line 6 in reverse direction when in an open configuration.

The valve 8 ’is controlled automatically on the basis of a pressure difference Δp between two cross sections 30’, 31 ’of the fluid line 6.

In detail, the cross sections 30 ', 31' are arranged on opposite expanses of the fluid line 6 with respect to the valve 8 '. Further, the cross sections 30', 31 'fluidly communicate with the reservoirs 2 , 3, respectively.

The valve 8 ’is in the open configuration when the pressure difference Δp is less than a threshold value Δp *, that is to say when the vehicle 1’ is in the right operational position.

In addition, the valve 8 ’is in the closed configuration when the pressure difference Δp is greater than the threshold value Δp *, that is to say when the vehicle 1’ is in the inclined stop position.

As shown in Figure 8, the pump 4 is arranged inside the reservoir 3, and the fluid line 6 extends from the reservoir 2 to the pump 4.

In more detail, the first suction inlet 4a is positioned at the connection between the pump 4 and the fluidic line 6; the suction inlet 4b is positioned inside the tank 3.

The operation of Vehicle 1 'is similar to that of Vehicle 1 and is only described to the extent that it differs from it.

In particular, when the vehicle 1 ’is in the upright operational position, the pressure difference Δp between the cross sections 30’ and 31 ’is less than the threshold value Δp *.

As a result, valve 8 ’is automatically set to the open configuration and allows fuel 20 to pass between tanks 2, 3 through fluid line 6.

In detail, the pump 4 sucks fuel 20 directly from the tank 3 through the suction inlet 4b and from the tank 2 via the fluidic line 6 through the suction inlet 4a. .

When the vehicle 1 'is moved from the upright operational position to the tilted stop position, a certain amount of the fuel 20 tends to descend along the fluidic line 6 from tank 3 to tank 2.

In this condition, a positive pressure difference Δp greater than the threshold value Δp * is established between the cross sections 31 ’and 30’.

In other words, the pressure in cross section 31 ’is greater than the pressure in cross section 30’.

As a result, valve 8 ’is automatically set to the open configuration and prevents fuel 20 from reaching tank 2 from tank 3.

While valve 8 ’is closed, pump 4 draws fuel directly from tank 3 through suction inlet 4b.

Referring to Figures 9, 10, reference numeral 1 "indicates a saddle-type vehicle according to a third embodiment of the present invention.

Vehicle 1 "is similar to vehicle 1, 1" and will only be described below to the extent that it differs from it; corresponding or equivalent parts of the vehicle 1, 1 ", 1" will, where possible, be indicated by the same reference numbers.

In detail, Vehicle 1 "differs from Vehicle 1 in that it includes a connection line 40" instead of breather pipe 40.

Connection line 40 ′ ’includes a first end 40a’ ’, which is positioned inside a tank 2’ ’, and a second end 40b’ ’, which is positioned inside tank 3’ ’.

Connection line 40 ’’ connects tanks 2 ’, 3’ regardless of the open / closed configuration of valve 8 and / or the tilted / upright position of vehicle 1 ’”.

In this way, the connection line 40 "establishes a permanent fluid connection between the tanks 2", 3 ".

The dimensions and proportions of the connection line 40 ’’ shown in the accompanying figures should be considered as purely indicative and not limiting.

In the illustrated embodiment, the connection line 40 "extends partially outside of tanks 2", 3 "and passes through the top of tanks 2", 3 ".

Alternatively, the connection line 40 ’’ passes through respective openings not shown in the plugs 12, 13.

The 40 "connection line acts as a means of ventilation for the 2" tank.

As a result, it prevents the development of a vacuum or excessive pressure inside Tank 2 ", by sucking (exhausting) air from (to) Tank 3".

In addition, the connection line 40 "allows the passage of fuel 20, preferably from tank 2" to tank 3 ".

In addition, first and second ends 40a '', 40b '' are positioned so as to be above the free surfaces 21 of the fuel 20 when the vehicle 1 '' is in the upright / stop operational operational positions, and the quantity of fuel 20 inside the 2 ", 3" tanks is less than the maximum admissible capacity.

The 40 ’’ connection line can be configured as a rigid pipe or flexible. In particular, the connection line 40 "can be a hose of the same type as the breather pipes 40, 41.

The operation of Vehicle 1 "is similar to that of Vehicle 1, 1" and is only described to the extent that it differs from it.

In detail, when the vehicle 1 '' is in the upright / stopped operational position (figure 9) and the quantity of fuel 20 inside the tank 2 '' is less than the maximum allowable capacity of the tank 2 ' ', the ends 40a' ', 40b' 'of the connection line 40' 'are both positioned above the free surfaces 21 of the fuel 20 inside the tanks 2' ', 3' 'and a connection permanent fluidics is established between the 2 '', 3 '' reservoirs.

In this case, the permanent fluid connection between the reservoirs 2 ", 3" relates mainly to the volumes of air contained in the respective reservoirs 2 ", 3".

In detail, the communicating air volumes can mix and homogenize by means of the 40 "connection line and, therefore, achieve the same physical properties (pressure, density, etc.).

Therefore, when a vacuum or excessive pressure develops inside the 2 '' tank, the air inside the 2 '' tank mixes with the air inside the 3 '' tank. , and the 3 '' tank is in turn vented through the 41 '' breather pipe.

In other words, the tank 2 "is vented indirectly, by means of a connection line 40" and a breather pipe 41 ".

When the vehicle 1 ’’ is in the tilted operating / stop position (Figure 10), the end 40a ’’ is positioned below the end 40b ’’ relative to the Z axis.

Therefore, if the amount of fuel inside tank 2 '' is greater than the maximum allowable capacity of tank 2 '' and valve 8, 8 'is not kept open or not functioning properly, fuel 20 rises. via the 40 '' connection line to 3 '' tank, in accordance with the principle of communicating vessels.

If the amount of fuel overflowing from tank 2 ’’ is sufficient to pass completely through connection line 40 ’’, fuel 20 is actually discharged into tank 3 ’’.

In this case, the connection line 40 ’’ establishes a fluid connection between the tanks 2 ’, 3’ ’, which mainly concerns the fuel 20.

In addition, fuel 20 inside tank 3 "exceeding the maximum allowable capacity of tank 3" is released through end 41b ".

The advantages of the vehicle 1, 1 ", 1" and of the method according to the present invention will become apparent from the above description.

In particular, the control means 15, 15 "prevent the passage of fuel 20 through the fluidic line 6 when the vehicle 1, 1", 1 "is in the inclined stop position.

Therefore, the overflow of fuel 20 out of the lower tank 2 is substantially prevented.

This is achieved during refueling or preheating operations, or when the vehicle 1, 1 ", 1" is parked.

In detail, when the valve 8, 8 ’is in the closed configuration, the flow of fuel 20 from tank 3 to tank 2 through fluid line 6 due to gravity is prevented.

Thus, the flow of fuel 20 from the tank 3 to the tank 2 beyond the maximum allowable capacity of the tank 2 is substantially excluded and, therefore, the overflow of fuel 20 out of the breather pipe 40 is substantially avoided. .

Accordingly, although during refueling operations, the insertion of fuel 20 into the higher tank 3 corresponds to the descent of fuel 20 through the fluidic line 6, the filling of the higher tank 3 is not. limited by risk of overflow from lower tank 2.

This is because when the valve 8, 8 "is in the closed configuration, the fluid connection between the reservoirs 2, 3 through the fluid line 6 is prevented. As a result, the filling of reservoirs 2, 3 is improved.

Moreover, since the valve 8 ’is an automatic valve, the control means 15’ need not include sensors 17, 18 nor a control unit 11.

In fact, the valve 8 ’is controlled only on the basis of a pressure difference Δp between two cross sections 30’, 31 ’of the fluid line 6.

The control of the valve 8 ’is therefore simplified compared to the control of the valve 8, and does not require the use of electrical energy.

In addition, since the pump 4 is arranged inside one of the reservoirs 2, 3 and under the saddle 7, an improved positioning of the pump 4 on the vehicle 1, 1 ", 1" is obtained.

In fact, since the pump 4 is arranged inside one of the reservoirs 2, 3 and under the saddle 7, it is possible to form the surface 7a substantially without any protrusion upward along the axis. Z.

Due to its shape, the surface 7a interferes with the movements of the driver in a negligible way or at least not to the detriment of the safety of the driver.

In addition, since the pump 4 is positioned inside one of the reservoirs 2, 3 and the part 101 of the surface 7a is concave, the barycenter of the vehicle is in a lower position with respect to the axis. Z as in the known motorcycles described in the introductory part of the present description.

A lower barycenter is advantageous in situations where vehicle stability is of the utmost importance, such as saddle type vehicles designed for off-road use, which are typically driven by a standing driver.

In addition, as the vehicle 1 '' has a 40 '' connection line and the tank 2 '' is not provided with a breather pipe which sucks (vents) air directly from (to) the exterior so as to ventilate the tank 2 ", the overflow and dispersion of fuel 20 out of the tanks 2", 3 "is further reduced.

In fact, unlike tank 2, tank 2 "is only vented indirectly through connection line 40" and tank 3 ".

As a result, Tank 2 "does not have a dedicated breather hose that could serve as a means to drain overflowing fuel from Tank 2" directly outside of Tank 2 ".

Therefore, if the valve 8, 8 'does not function properly and remains open while the vehicle 1' 'is in the tilted stop position, and if as a result the fuel 20 exceeds the maximum allowable capacity of the tank 2' ' , fuel 20 is not released into the environment, and the performance of the vehicle 1 '' is not deteriorated.

On the contrary, in this case, fuel 20 is discharged into tank 3 ", which is in a higher position relative to tank 2".

Accordingly, since the end 41a '' of the breather pipe 41 '' is in a higher position with respect to the free surfaces 21 of the fuel 20 inside the tank 3 '', even in cases where the amount of Fuel 20 inside the 3 '' tank is equal to the maximum allowable capacity of the 3 '' tank, the release of fuel 20 out of the 3 '' tank is much less likely.

In other words, since the overflow of fuel 20 out of tanks 2 '', 3 '' is much less likely to occur even if valve 8, 8 'is left open by mistake, operation of vehicle 1' 'is safer and more reliable.

Finally, it appears that modifications and variants that do not go beyond the present invention can be made concerning the vehicle 1, 1 ", 1" and the method according to the present invention.

In particular, the sensor 18 could be replaced by an inclination sensor, which would for example measure the inclination of the Z axis of the vehicle 1 with respect to the direction H, thus obtaining the second datum concerning the position of the vehicle 1 .

In addition, the 1, 1 ", 1" vehicle could have more than a couple of 2.2 "fuel tanks; 3, 3 ". Accordingly, the present invention would apply to every couple of fuel tanks 2, 2 "; 3, 3 ". In particular, tanks 2, 2 "; 3.3 '' of each pair would be fluidly connected by means of a respective 6 fluid line.

The pump 4 of the vehicle 1 could also be arranged inside the tank 3, 3 ".

As a result, a fluidic line 6 would extend between the reservoir 2, 2 "and the pump 4.

Claims (25)

Saddle type vehicle (1, 1 ', 1''), comprising:
- a frame (50), which defines a front-rear axis (X) and a bottom-up axis (Z) perpendicular to said front-rear axis (X);
- a first fuel tank (2, 2 '') and a second fuel tank (3, 3 ''); and
- a fluidic line (6), which is interposed between said first fuel tank (2, 2 '') and said second fuel tank (3, 3 '');
characterized in that it further comprises control means (15, 15 ') configured for:
- establish a fluidic connection through said fluidic line (6) between said first fuel tank (2, 2 '') and said second fuel tank (3, 3 ''), so as to allow the passage of a fuel (20) across said fluidic line (6) when, in use, said vehicle (1, 1 ', 1'') is in an upright operational position, in which said down-up axis (Z) is parallel in a vertical direction (H); Where
- preventing the fluidic connection through said fluidic line (6) between said first and second fuel tanks (2, 2 ''; 3, 3 ''), so as to prevent the passage of said fuel (20) through said line fluidics (6) when, in use, said vehicle (1, 1 ', 1'') is in an inclined stop position, in which said down-up axis (Z) is inclined with respect to said direction vertical (H).
Saddle-type vehicle according to claim 1, characterized in that said control means (15, 15 ') comprises a valve (8, 8'), which is positioned on said fluid line (6); said valve (8, 8 ') being controllable to take:
- an open configuration in which it allows, in use, the passage of said fuel (20) through said fluidic line (6), when said vehicle (1, 1 ', 1'') is in said upright operational position; Where
- a closed configuration, in which it prevents, in use, the passage of said fuel (20) through said fluidic line (6), when said vehicle (1, 1 ', 1'') is in said inclined stop position .
Saddle-type vehicle according to claim 2, characterized in that said valve (8) is an electrically operable valve, in particular a solenoid valve.
A saddle-type vehicle according to claims 2 or 3, further comprising an engine (5), which can be controlled to assume a started state or a stopped state; characterized in that said control means (15) further comprises:
- a plurality of sensors (17, 18), which are used to collect at least a first datum concerning the state of said motor (5) and at least a second datum concerning the inclination of said down-up axis (Z) with respect to to said vertical direction (H); and
- a control unit (11), which is programmed to receive, in use, at least said first and second data, and to instruct said valve (8) to take said open configuration or said closed configuration on the basis of said first and second data.
A saddle type vehicle according to claim 4, further comprising:
- an ignition switch (9) for instructing said engine (5) to assume said started state or said stopped state; and
- a side stand (10), which can be selectively adjusted in an activated configuration, in which it supports, in use, said vehicle (1) in said inclined stop position, or in a deactivated configuration, in which it leaves free , in use, moving said vehicle (1) to said upright operational position;
characterized in that said sensors (17, 18) collect respectively said first data from said ignition switch (9) and said second data from said sidestand (10).
Saddle type vehicle according to claim 5, characterized in that said inclined stop position corresponds, in use, to at least one operation of refueling said vehicle (1) or to a preheating operation of said vehicle (1) ;
said engine (5) being, in use, in said stopped state and said sidestand (10) being, in use, in said activated configuration when said vehicle (1) is, in use, in said refueling operation;
said engine (5) being, in use, in said started state and said sidestand (10) being, in use, in said activated configuration when said vehicle (1) is, in use, in said preheating operation;
said engine (5) being, in use, in said started state and said side stand (10) being, in use, in said deactivated configuration when said vehicle (1) is, in use, in said upright operational position;
said valve (8) being set, in use, to said closed configuration when said vehicle (1) is, in use, in said refueling operation or in said preheating operation;
said valve (8) being set, in use, to said open configuration when said vehicle (1) is, in use, to said upright operational position.
Saddle-type vehicle according to claim 2, characterized in that said valve (8 ') is a one-way valve, controllable on the basis of a pressure difference (Δp) between two cross sections (30', 31 ' ) of said fluidic line (6); said two cross sections (30 ', 31') being arranged on opposite extents of said fluid line (6) relative to said valve (8 ');
one (30 ') of said cross sections (30', 31 ') being in fluid communication with said first fuel tank (2, 2''), and the other (31') of said cross sections (30 ', 31 ') being in fluid communication with said second fuel tank (3, 3'');
said valve (8 ') being in said open configuration when said pressure difference (Δp) is less than a threshold value (Δp *), and being in said closed configuration when said pressure difference (Δp) is greater than said value threshold (Δp *).
Saddle type vehicle according to any one of the preceding claims, characterized in that it further comprises:
- a connection line (40 ''), which establishes an additional permanent fluid connection between said first and second fuel tanks (2 '', 3 '');
said connection line (40 '') comprising a first end (40a '') and a second end (40b ''), which are positioned inside the first and second fuel tanks (2 '', 3 '' ), respectively;
said connection line (40 '') being adapted to discharge into said second fuel tank (3 '') fuel (20) overflowing from said first fuel tank (2 ''); and
- ventilation means (41 '') of said second fuel tank (3 ''), being adapted to directly ventilate said second fuel tank (3 '') and said first fuel tank (2 '') by the intermediate said connection line (40 '');
said first and second ends (40a '', 40b '') being positioned, in use, above said free surfaces (21) of said fuel (20) within the respective first and second tanks (2 '', 3 '') at least when, in use, said vehicle (1 '') is in said upright operational position.
Saddle-type vehicle according to any one of claims 5 to 8, characterized in that it comprises:
- a saddle (7); and
- a single pump (4);
said first and second reservoirs (2, 2 ''; 3, 3 '') being respectively arranged on a first and a second side (1a, 1b), opposite to each other with respect to said front-rear axis ( X);
said single pump (4) being arranged inside one of said first and second fuel tanks (2, 2 ''; 3, 3 '') and under said saddle (7);
said side stand (10) being operatively connected to said first side (1a) of said vehicle (1, 1 ', 1'').
Saddle-type vehicle according to claim 9, when dependent on claims 5 or 6, characterized in that said single pump (4) is arranged on said first side (1a).
Saddle-type vehicle according to claim 9, when dependent on claim 7, characterized in that said single pump (4) is arranged on said second side (1b).
A saddle-type vehicle (1, 1 ', 1'') according to claim 1, comprising:
-
- a saddle (7);
- a single pump (4); and
-the fluidic line (6) extends between said first and second fuel tanks (2, 2 ''; 3, 3 '') from one to the other;
characterized in that said single pump (4) is arranged inside one of said first and second fuel tanks (2, 2 ''; 3, 3 '') along said fluid line (6) and under said saddle (7).
Saddle-type vehicle according to claim 12, characterized in that said first and second fuel tanks (2, 2 ''; 3, 3 '') are arranged on said vehicle (1, 1 ', 1'') d 'symmetrically with respect to a front-rear axis (X) of said vehicle (1, 1', 1 '').
Saddle-type vehicle according to claim 12 or 13, characterized in that said first and second fuel tanks (2, 2 ''; 3, 3 '') each include at least one respective filler cap (12, 13) , and in that said saddle (7) is arranged under said at least one filler cap (12, 13) with respect to a bottom-up axis (Z) of said vehicle (1, 1 ', 1'').
A saddle-type vehicle according to claim 14, characterized in that said pump (4) and said saddle (7) are offset along a further axis (Y), which is perpendicular to said front-rear axis (X) and said down-up axis (Z).
Saddle-type vehicle according to claim 14 or 15, characterized in that said pump (4) extends along said bottom-up axis (Z) between a first height (z1) and a second height (z2), greater at said first height (z1); and in that said saddle (7) extends along said down-up axis (Z) between a third height (z3) and a fourth height (z4), greater than said third height (z3); said second height (z2) being less than said fourth height (z4).
Saddle type vehicle according to claim 16, characterized in that said first height (z1) is less than said third height (z3).
A method of using a saddle-type vehicle (1, 1 ', 1'') having a first fuel tank (2, 2'') and a second fuel tank (3, 3''), characterized in that it comprises the steps of:
i) establishing a fluidic connection through a fluidic line (6) of said vehicle (1, 1 ', 1'') between said first and second fuel tanks (2, 2''; 3, 3'') when said vehicle (1, 1 ', 1'') is in an upright operational position, in which a down-up axis (Z) of said vehicle (1, 1', 1 '') is parallel to a vertical direction (H); said fluidic line (6) being interposed between said first fuel tank (2, 2 '') and said second fuel tank (3, 3 ''); Where
ii) prevent fluid connection through said fluid line (6) between said first and second fuel tanks (2, 2 ''; 3, 3 '') when said vehicle (1, 1 ', 1'') is in an inclined stop position, in which said down-up axis (Z) is inclined with respect to said vertical direction (H).
A method according to claim 18, characterized in that said steps i) and ii) include the step of iii) setting a valve (8, 8 ') in an open configuration, in which it allows the passage of said fuel (20). across said fluidic line (6) when said vehicle (1, 1 ', 1'') is in said upright operational position; or in a closed configuration, in which it prevents the passage of said fuel (20) through said fluidic line (6), when said vehicle (1, 1 ', 1'') is in said inclined stop position.
Method according to Claim 19, characterized in that it comprises the additional steps consisting in:
iv) collecting at least a first piece of data concerning the state of an engine (5) of said vehicle (1) and at least one second piece of data concerning the inclination of said down-up axis (Z) with respect to said vertical direction (H ) by means of a plurality of sensors (17, 18) arranged on said vehicle (1);
v) controlling said motor (5) to assume a started state or a stopped state;
vi) receiving at least said first and second data, and instructing said valve (8) to assume said open configuration or said closed configuration based on said first and second data.
A method according to claim 20, characterized in that said step iv) comprises the steps of:
vii) setting an ignition switch (9) of said vehicle (1) in a starting position, in which it sets said engine (5) in said started state or in a stopped position, in which it regulates said engine ( 5) in said stopped state;
viii) adjusting said side stand (10) of said vehicle (1) in an activated configuration, in which it supports said vehicle (1) when in said inclined stop position, or in a deactivated configuration, in which it leaves free movement of said vehicle (1) when it is in said upright operational position;
ix) collecting at least a first data from a first sensor (17), which detects the position of said ignition switch (9) of said vehicle (1); and
x) collecting at least said second data from a second sensor (18), which detects the configuration of said side stand (10) of said vehicle (1).
A method according to claim 21, characterized in that said step iii) comprises the steps of:
xi) setting said valve (8) in said closed configuration when said vehicle (1) is in a refueling operation from said tilted stop position with said engine (5) in said stopped state and said sidestand (10) in said activated configuration;
xii) setting said valve (8) in said closed configuration when said vehicle (1) is in a preheating operation from said tilted stop position with said engine (5) in said running state and said sidestand (10) in said activated configuration; and
xiii) adjusting said valve (8) to said open configuration when said vehicle (1) is in said upright operational position with said engine (5) in said switched on state and said sidestand (10) in said deactivated configuration.
A method according to claim 19, characterized in that said step iii) comprises the steps of:
xiv) controlling said valve (8 ') via a pressure difference (Δp) between two cross sections (30', 31 ') of said fluid line (6); said cross sections (30 ', 31') being arranged on respective opposite extents of said fluid line (6) relative to said valve (8 ');
said step xiv) comprising the sub-steps consisting in:
xv) adjusting said valve (8 ') to said open configuration when said pressure difference (Δp) is less than a threshold value (Δp *); and
xvi) adjusting said valve (8 ') to said closed configuration when said pressure difference (Δp) is greater than said threshold value (Δp *);
said pressure difference (Δp) being less than said threshold value (Δp *) when said vehicle (1 ') is in said right operational position and being greater than said threshold value (Δp *) when said vehicle (1') is in said inclined stop position.
Method according to one of claims 18 to 23, characterized in that it comprises the additional steps consisting in:
xvii) establishing an additional permanent fluid connection between said first and second fuel tanks (2 '', 3 '') via a connection line (40 '');
said connection line (40 '') comprising a first end (40a '') and a second end (40b ''), which are positioned respectively inside said first and second fuel tanks (2 '', 3 ''); and
xviii) discharging into said second fuel tank (3 '') fuel (20) overflowing from said first fuel tank (2 '') via said connection line (40 ''), when said vehicle (1 '') is in said inclined stop position.
Method according to Claim 24, characterized in that it comprises the additional steps consisting of:
xix) ventilating said second fuel tank (3 '') by means of ventilation means (41 ''); and
xx) venting said first fuel tank (2 '') through said connection line (40 '');
said first and second ends (40a '', 40b '') being positioned above said free surfaces (21) of said fuel (20) inside the respective first and second tanks (2 '', 3 '') at the less when said vehicle (1 '') is in said upright operational position.