The present invention provides a power supply method and system for a hydrogen fuel cell stack, and a hydrogen powered motorcycle and a driving method and system thereof, the power supply method includes: a control chip detecting the operating states of the hydrogen fuel cell stack and the lithium battery pack; when the hydrogen fuel cell stack and the lithium battery pack are free of faults, obtaining the output voltage of the lithium battery pack; when the output voltage is lower than the charge-on threshold, the hydrogen fuel cell stack powering the lithium battery pack; when the output voltage is higher than the charge-stop threshold, disconnecting the circuit of the hydrogen fuel cell stack powering the lithium battery pack, when the output voltage is more than or equal to the charge-on threshold and less than or equal to the charge-stop threshold, the circuit of the hydrogen fuel cell stack remaining to power the lithium battery pack; and when the output voltage is higher than the charge-stop threshold, disconnecting the circuit oi the hydrogen fuel cell stack powering the lithium battery pack. The aforementioned technical solution uses hydrogen energy as the electrical energy powering the motorcycle as much as possible under the protection of the hydrogen fuel cell stack.

The present invention provides a power supply method and system for a hydrogen fuel cell stack, and a hydrogen powered motorcycle and a driving method and system thereof, the power supply method includes: a control chip detecting the operating states of the hydrogen fuel cell stack and the lithium battery pack; when the hydrogen fuel cell stack and the lithium battery pack are free of faults, obtaining the output voltage of the lithium battery pack; when the output voltage is lower than the charge-on threshold, the hydrogen fuel cell stack powering the lithium battery pack; when the output voltage is higher than the charge-stop threshold, disconnecting the circuit of the hydrogen fuel cell stack powering the lithium battery pack, when the output voltage is more than or equal to the charge-on threshold and less than or equal to the charge-stop threshold, the circuit of the hydrogen fuel cell stack remaining to power the lithium battery pack; and when the output voltage is higher than the charge-stop threshold, disconnecting the circuit oi the hydrogen fuel cell stack powering the lithium battery pack. The aforementioned technical solution uses hydrogen energy as the electrical energy powering the motorcycle as much as possible under the protection of the hydrogen fuel cell stack.

A motorcycle includes an electric motor having an output shaft defining a motor axis, a rear wheel drivably coupled to the electric motor to propel the motorcycle, a swingarm rotatably supporting the rear wheel, and a frame. The frame includes a main frame member supporting the electric motor and the swingarm. A case of the electric motor is a stressed member of the frame between the main frame member and the swingarm. The swingarm is coupled to the case of the electric motor to define a swingarm pivot axis that is co-axial with the motor axis.

A tiltable vehicle has a pair of front wheels coupled to a tiltable chassis by a tilt linkage, such that the pair of front wheels and the chassis are configured to tilt in unison with respect to a roll axis of the chassis. The tilt linkage includes a four-bar linkage having a pair of upper bar segments coupled to the chassis at spaced-apart respective inboard joints. In some examples, the inboard joints of the upper bar segments are each disposed outboard of a central chassis joint of a lower bar of the tilt linkage. An orientation sensor is configured to detect directional information regarding a net force vector applied to the chassis, and a tilt actuator operatively coupled to the chassis and configured to selectively tilt the chassis. A controller is configured to selectively control the tilt actuator based on the directional information from the orientation sensor.

An electric off-road vehicle includes a drive assembly including an electric motor; wheels including front wheels and rear wheels; a frame assembly on which the electric motor arranged; a battery pack providing electric energy for the electric motor; and a drive train including a drive axle assembly and a drive shaft. The drive shaft is connected between the electric motor and the drive axle assembly. The electric motor transmits a torque to at least part of the drive axle assembly through the drive shaft, and the drive shaft is positioned below the battery pack.

An electric off-road vehicle includes a drive assembly including an electric motor; wheels including front wheels and rear wheels; a frame assembly on which the electric motor arranged; a battery pack providing electric energy for the electric motor; and a drive train including a drive axle assembly and a drive shaft. The drive shaft is connected between the electric motor and the drive axle assembly. The electric motor transmits a torque to at least part of the drive axle assembly through the drive shaft, and the drive shaft is positioned below the battery pack.

Transportation vehicles, suspension systems and related methods are provided herein. A three wheeled vehicle can include a frame having a first side and second side and a front end and a rear end and a steerable front wheel secured to the front end of the frame. The vehicle can also include a first trailing wheel arm with a first rear wheel and a second trailing wheel arm with a second rear wheel. The vehicle can also include a central suspension joint secured to the frame on which the first trailing wheel arm and the second trailing wheel arm are rotatably secured on either side of the frame. Further, the vehicle can include a horizontal linkage having a first end and a second end and a midsection between the first and second ends. The horizontal linkage can be pivotably connected to a pintle on the frame at the midsection beneath the first and second trailing wheel arms with the horizontal linkage linked to an underside of the first trailing wheel arm between the first wheel and the central suspension joint proximal to the first end of the horizontal linkage and linked to an underside of the second trailing wheel arm between the second wheel and the central suspension joint proximal to the second end of the horizontal linkage.

Transportation vehicles, suspension systems and related methods are provided herein. A three wheeled vehicle can include a frame having a first side and second side and a front end and a rear end and a steerable front wheel secured to the front end of the frame. The vehicle can also include a first trailing wheel arm with a first rear wheel and a second trailing wheel arm with a second rear wheel. The vehicle can also include a central suspension joint secured to the frame on which the first trailing wheel arm and the second trailing wheel arm are rotatably secured on either side of the frame. Further, the vehicle can include a horizontal linkage having a first end and a second end and a midsection between the first and second ends. The horizontal linkage can be pivotably connected to a pintle on the frame at the midsection beneath the first and second trailing wheel arms with the horizontal linkage linked to an underside of the first trailing wheel arm between the first wheel and the central suspension joint proximal to the first end of the horizontal linkage and linked to an underside of the second trailing wheel arm between the second wheel and the central suspension joint proximal to the second end of the horizontal linkage.

An electric vehicle includes a wheel, an electric motor to drive the wheel, a battery to supply electric power to the electric motor, the battery including battery cells and a battery casing to house the battery cells, an onboard charger to charge the battery, the onboard charger being opposed to and spaced apart from an outer surface of the battery casing so that an air flow path exists between the onboard charger and the outer surface of the battery casing, and a cooling fan to generate a flow of air passing through the air flow path between the onboard charger and the battery casing.

An electric vehicle includes a wheel, an electric motor to drive the wheel, a battery to supply electric power to the electric motor, the battery including battery cells and a battery casing to house the battery cells, an onboard charger to charge the battery, the onboard charger being opposed to and spaced apart from an outer surface of the battery casing so that an air flow path exists between the onboard charger and the outer surface of the battery casing, and a cooling fan to generate a flow of air passing through the air flow path between the onboard charger and the battery casing.