Hybrid straddle vehicle

1. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine; and

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor,

wherein an outer end of the fuel tank in a vehicle width direction is located outward of the battery unit in the vehicle width direction, and

wherein an upper end of the fuel tank is located below an upper end of the battery unit.

2. The hybrid straddle vehicle according to claim 1 , further comprising a muffler,

wherein the fuel tank is located on a side opposite to the muffler with respect to a center line of the vehicle in the vehicle width direction.

3. The hybrid straddle vehicle according to claim 1 , further comprising a swing arm supported by the pair of right and left main frames so that the swing arm is pivotable around a pivot extending in the vehicle width direction,

wherein the fuel tank is disposed between an axle of a rear wheel and the pivot in a forward and rearward direction.

4. The hybrid straddle vehicle according to claim 3 ,

wherein the fuel tank is disposed rearward of the engine, the traveling motor, and the battery unit.

5. The hybrid straddle vehicle according to claim 4 ,

wherein the vehicle body frame further includes a rear frame extending rearward from the pair of right and left main frames, and

wherein the fuel tank is disposed outward of the rear frame in the vehicle width direction.

6. The hybrid straddle vehicle according to claim 5 ,

wherein the fuel tank is supported by the rear frame.

7. The hybrid straddle vehicle according to claim 5 , further comprising a seat disposed above the pair of right and left main frames or the rear frame,

wherein the fuel tank is disposed laterally of the seat.

8. The hybrid straddle vehicle according to claim 1 ,

wherein the fuel tank is disposed outward of one of the pair of right and left main frames in the vehicle width direction.

9. The hybrid straddle vehicle according to claim 1 , further comprising:

a throttle body accommodating therein a throttle valve which adjusts an amount of intake-air to be supplied to the engine;

a fuel injector which is attached to the throttle body and injects fuel; and

a fuel chamber disposed between the fuel tank and the fuel injector,

wherein the fuel tank includes a fuel supply port, and

wherein the fuel chamber is disposed forward of the fuel tank, and rearward of the throttle body.

10. The hybrid straddle vehicle according to claim 9 ,

wherein the fuel chamber is disposed between a pair of right and left front forks.

11. The hybrid straddle vehicle according to claim 1 , further comprising:

a guard member disposed outward of the fuel tank in the vehicle width direction.

12. A hybrid straddle vehicle comprising:

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine; and

a battery unit which stores therein electric power to be supplied to the traveling motor,

wherein an outer end of the fuel tank in a vehicle width direction is located outward of the battery unit in the vehicle width direction,

wherein a center of gravity of the battery unit is located between a pair of right and left front forks, and

wherein in a state in which the fuel tank is fully filled with fuel, a center of gravity of the fuel tank is located outward of one of the pair of right and left front forks in the vehicle width direction.

13. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine;

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor; and

a side stand,

wherein the fuel tank includes a fuel supply port,

wherein the fuel supply port of the fuel tank is located on the same side as the side stand, and

wherein an outer end of the fuel tank in a vehicle width direction is located outward of the battery unit in the vehicle width direction.

14. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine;

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor; and

a muffler,

wherein the fuel tank includes a fuel supply port,

wherein the fuel supply port of the fuel tank is located on a side opposite to the muffler in a vehicle width direction, and

wherein an outer end of the fuel tank in the vehicle width direction is located outward of the battery unit in the vehicle width direction.

15. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine;

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor;

a transmission; and

a driving source casing accommodating the engine, the traveling motor, and the transmission,

wherein the engine, the traveling motor, and the transmission accommodated in the driving source casing are integrated into a unit,

wherein the battery unit is located above the driving source casing, and

wherein an outer end of the fuel tank in a vehicle width direction is located outward of the battery unit in the vehicle width direction.

16. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine;

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor;

a fuel pump; and

a coolant tank,

wherein an outer end of the fuel tank in a vehicle width direction is located outward of the battery unit in the vehicle width direction, and

wherein the coolant tank is located on a side opposite to the fuel pump in the vehicle width direction.

17. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine;

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor; and

a driving power transmission unit to which the driving power generated by the traveling driving power unit is transmitted,

wherein the fuel tank is located on the same side as the driving power transmission unit with respect to a center line of the vehicle in a vehicle width direction, and is located above the driving power transmission unit, and

wherein an outer end of the fuel tank in the vehicle width direction is located outward of the battery unit in the vehicle width direction.

18. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine; and

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor,

wherein the fuel tank is mounted on a left side of a front portion of the vehicle and located outward of the left main frame in a vehicle width direction, and

wherein an outer end of the fuel tank in the vehicle width direction is located outward of the battery unit in the vehicle width direction.

19. A hybrid straddle vehicle comprising:

a vehicle body frame including a head pipe and a pair of right and left main frames extending rearward from the head pipe;

a hybrid traveling driving power unit including an engine and a traveling motor, the hybrid traveling driving power unit being configured to generate driving power for allowing the hybrid straddle vehicle to travel;

a fuel tank which stores therein fuel to be supplied to the engine; and

a battery unit which is disposed between the pair of right and left main frames and which stores therein electric power to be supplied to the traveling motor,

wherein the fuel tank is mounted on a right side of a front portion of the vehicle and located outward of the right main frame in a vehicle width direction, and

wherein an outer end of the fuel tank in the vehicle width direction is located outward of the battery unit in the vehicle width direction.