Abstract: A ground leakage detector for detecting a ground leakage in an electric vehicle including a battery, and a charging connector which is electrically connectable to a terminal member formed at one end of an outside electric wire through which electric power is supplied from outside to the battery, includes a connector connection section electrically connectable to the charging connector; a contactor configured to contact a vehicle body ground location in the electric vehicle; and a detecting circuit for detecting whether or not there is a ground leakage from the battery to the vehicle body ground location, based on a current flowing between the connector connection section and the contactor.

Abstract: A straddle electric vehicle which rotates a drive wheel by driving power generated in an electric motor, comprises a battery unit which is an electric power supply for the electric motor; a vehicle body frame including a support frame for supporting the battery unit; and a battery case storing the battery unit; the battery case includes a support member which is placed below the battery unit and is vertically directly or indirectly in contact with the battery unit; and wherein the support frame supports the battery case and the battery unit in such a manner that the support frame is placed below the battery case to be vertically directly or indirectly in contact with the battery case.

Abstract: A straddle-type electric vehicle (e.g., electric motorcycle 1) comprising a driving motor and an electric power control unit for controlling electric power supplied from batteries to the driving motor, a case of the electric power control unit is mounted from a location outward of the battery box, and electrode terminals protruding outward from the case are inserted into insertion holes of the battery box. The electrode terminals protruding into inside of the battery box are connected to electrodes of the batteries via electric conductors such as bus bars. In this structure, electric connecting work between the batteries and the electric power control unit can be easily carried out, high-voltage lines can be minimized in length, and the high-voltage lines are not exposed to the outside.

Abstract: A straddle electric vehicle comprises a battery case accommodating a Battery which is an electric power supply for an electric motor; an inverter which converts DC power stored in the battery into AC power and supplies the AC power to the electric motor; an air passage through which ram air is guided to an interior of a battery case and discharges air from the battery case; and a radiator for cooling a coolant used to cool the inverter using water or oil, wherein the radiator is placed forward relative to an air inlet of the air passage or within the air passage.

Abstract: A traction control system in vehicle comprises a detector for detecting a monitored value which changes according to a degree of a drive wheel slip; a condition determiner for determining whether or not the monitored value meets a control start condition and whether or not the monitored value meets a control termination condition; and a controller for executing traction control to reduce a driving power of the drive wheel during a period of time from when the condition determiner determines that the monitored value meets the control start condition until the condition determiner determines that the monitored value meets the control termination condition; the condition determiner being configured to set at least the control start condition variably based on a slip determination factor which changes according to a vehicle state and such that the control start condition changes more greatly according to the vehicle state than the control termination condition.

Abstract: A straddle electric vehicle includes a battery unit which is an electric power supply for an electric motor; a vehicle body frame including a main frame unitarily joined to a head pipe; and a sub-frame extending rearward from an upper portion of the main frame. The main frame includes a down frame member extending downward from the head pipe and a lower frame member extending rearward from a lower end of the down frame member, and the sub-frame is detachably joined to the vehicle body frame. A bottom portion of the battery unit is supported on the lower frame member of the main frame, and a side portion of the battery unit is covered with the sub-frame.

Abstract: A control system includes an electric motor, an electric storage device, a throttle grip, a brake lever, a controller, and an acceleration/deceleration adjustment lever. The controller supplies electric power from the electric storage device to the electric motor in response to an acceleration command input by the throttle grip when the acceleration/deceleration adjustment lever is placed in a location closer to a driver than a cut-off position to cause the electric motor to activate the rear wheel, and cuts off electric power supplied to the electric motor irrespective of an operation of the throttle grip in a state in which the acceleration/deceleration adjustment lever has been operated and placed in the cut-off position.

Abstract: An electric vehicle comprises an electric motor; a manual transmission which selects one driving power transmission path and shifts a present driving power transmission path to the selected driving transmission path, in response to a rider changing a speed of the electric motor; a shifting state detecting device for detecting whether the manual transmission is in a driving power transmission state or in a driving power cut-off state; and a motor controller for executing a first control routine to control the electric motor; wherein in the first routine, torque control of the electric motor is performed when the manual transmission is detected to be in the driving power transmission state, and mitigation control of the electric motor is performed to mitigate an impact caused by shifting, when the manual transmission is detected to be in the driving power cut-off state, the mitigation control being different from the torque control.

Abstract: A control system includes an electric motor, an electric storage device, a throttle grip, a brake lever, a controller, and an acceleration/deceleration adjustment lever. The controller supplies electric power from the electric storage device to the electric motor in response to an acceleration command input by the throttle grip and causes the electric motor to drive the rear wheel. The controller adjusts the electric power generated by rotational power applied by the rear wheel in response to an acceleration/deceleration command from the acceleration/deceleration adjustment lever. The acceleration/deceleration adjustment lever is provided separately from throttle grip.

Abstract: A straddle electric vehicle which rotates a drive wheel by driving power generated in an electric motor, comprises a battery unit which is an electric power supply; and a battery case for storing the battery unit; wherein the battery case includes a pair of first case member and second case member which are joined together such that the first case member and the second case member are horizontally separable from each other, and a parting line of the first case member and the second case member extends above a bottom wall of the battery case; and wherein the first case member and the second case member include a first flange section and a second flange section, respectively, which define the parting line, and are separably joined to each other in a state in which the first flange section and the second flange section are engaged with each other.

Abstract: A straddle electric vehicle comprises an electric motor which is a driving power source for activating the vehicle; a high-voltage battery for storing electric power supplied to the electric motor; a low-voltage battery for storing the electric power supplied to an auxiliary machine mounted in the vehicle; a converter for converting a voltage of the electric power supplied from the high-voltage battery to the low-voltage battery into a voltage to be charged into the low-voltage battery; and a case having an insulativity, for storing the high-voltage battery; wherein the low-voltage battery is placed outside the case, and the converter is stored in the case.

Abstract: An electric vehicle comprises a motor controller for controlling an electric motor to execute a control routine to perform torque control when the driving power transmission path is detected to be in the driving power transmission state, and executes a control routine to perform rotational speed control, when the driving power transmission path is detected to be in the driving power cut-off state; wherein in the rotational speed control, an angular velocity of an upstream rotary member gets close to an angular velocity of a downstream rotary member; wherein when shifting from the driving power cut-off state to the driving power transmission state, the motor controller switches the rotational speed control to the torque control after performing predetermined transit control; and wherein a change rate of the torque output is made less in the transit control than in the torque control.

Abstract: A straddle electric vehicle comprises a battery case for storing a battery unit; an inverter for converting DC power stored in the battery unit into AC power; a plurality of electric components connected to the battery unit and the inverter; and an electric motor for generating driving power for rotating a drive wheel, by the AC power generated by conversion in the inverter; wherein the plurality of electric components are stored in the battery case such that the electric components are placed above the battery unit.

Abstract: A straddle electric vehicle comprises a seat on which a rider is seated in a straddle state; right and left foot steps on which the rider puts feet, an electric motor for generating driving power for moving the straddle electric vehicle; a battery unit which is an electric power supply for activating the electric motor; and a battery case for storing the battery unit. The battery case is placed between the steering shaft and the seat in a forward or rearward direction and includes a seat vicinity portion which faces the seat in the forward or rearward direction. The seat vicinity portion is smaller in dimension in a rightward or leftward direction than a portion of the battery case which is other than the seat vicinity portion.

Abstract: A transmission for a motorcycle has an input shaft, an output shaft, a plurality of speed change input gears, and a plurality of speed change output gears, and performs shifting by a shift mechanism. The speed change input gears are fixed to one of the input shaft and the output shaft, e.g., the input shaft, in the axial direction and about the axis, the speed change output gears are fixed to the output shaft in the axial direction and are fitted to be rotatable about the axis, and a plurality of slider rings for dog-coupling are fixed to the other shaft about the axis and are provided to be slidable in the axial direction. An engaging hole is formed in the slider rings, and the speed change gears on the other shaft are formed with an engaging projection which can engage with the engaging hole by the movement of the slider rings in the axial direction.

Abstract: An electric motorcycle according to the present invention includes an electric motor generating traveling power to be transmitted to a driving wheel, a battery supplying electric power to the electric motor, a battery case accommodating the battery, and a body frame having a head pipe supporting a steering shaft, and a frame portion extending substantially rearward from the head pipe. The battery case has a first connecting portion to be coupled to a first member forming the body frame, and a second connecting portion arranged away from the first connecting portion in the up and down direction or the forward and rearward direction and coupled to a second member forming the body frame, so as to form a part of the frame portion.

Abstract: A vehicle comprises an acceleration command input device operated by a driver to input an acceleration command; a braking command input device operated by the driver to input a braking command; and an engine controller for controlling a plurality of engine control components to change an engine driving power in response to the acceleration command and executing a deceleration control for reducing the engine driving power when a predetermined deceleration condition is met; the engine controller executing driving power increasing preparation for changing a controlled amount of at least one of the engine control components to increase the engine driving power while maintaining the deceleration control state when inputting of the braking command stops during the deceleration control, and changing a controlled amount of at least one of the engine control components to increase the engine driving power when the acceleration command is input thereafter.

Abstract: There is provided a discharge ability estimating system for estimating a discharge ability of a battery for supplying electric power to an electric motor which rotates a crankshaft of an engine to start the engine, the system being configured to estimate the discharge ability of a battery based on an angular acceleration state of the crankshaft in a rotation starting period of the crankshaft.

Abstract: A traction control system comprises a detector configured to detect a monitored spin value corresponding to a spin amount of a drive wheel in a vehicle; a condition determiner configured to determine whether or not the monitored spin value detected by the detector meets a driving power suppressing condition; and a controller configured to execute a traction control for reducing a driving power of the drive wheel based on the determination; the condition determiner being configured to set the driving power suppressing condition variably based on at least one of a variable parameter relating to a rotation number difference which is variable according to a change rate of a rotation number difference between the drive wheel and a driven wheel, and a variable parameter relating to rotation of a drive system which is variable according to a rotation change rate of the drive system for driving the drive wheel.

Abstract: An electric motorcycle includes a driving command detecting device, a state value detecting device, an electric motor driving a drive wheel, a control unit for executing a non-normal mode causing output of the electric motor in a non-normal mode to differ from the output of the electric motor in a normal mode, the control unit configured to shift the electric motorcycle from one of the normal or non-normal modes to the other normal or non-normal mode, when the state value satisfies a predetermined shift condition, in one of the normal and non-normal modes, and a cornering determiner unit for determining cornering status, wherein the control unit causes a change in the output of the electric motor to be less, when the electric motorcycle is cornering and the shift condition is satisfied than when the cornering determiner unit determines the electric motorcycle is not cornering and the shift condition is satisfied.