METHOD FOR CONTROLLING AN ELECTRIC DRIVE OF A TWO-WHEEL AND CONTROL DEVICE FOR EXECUTING THE METHOD

Description

Technical field

[0001] The present invention relates to a method for controlling an electric drive of a two-wheeled vehicle. It also relates to a control device for carrying out the method and to a two-wheeled vehicle with such a control device. In particular, the invention relates to a method for controlling an electric drive of a two-wheeled vehicle that can be driven via a drive wheel based on muscle power applied by the rider of the two-wheeled vehicle to a crank mechanism and a driving force from an electric drive motor provided on the two-wheeled vehicle. In this respect, the invention relates to a method for controlling an electric drive of a two-wheeled vehicle designed as an e-bike or pedelec. State of the art

[0002] Methods for controlling the electric drive of a two-wheeler designed as an e-bike or pedelec are known. In known two-wheelers of this type, the electric motor for propelling the two-wheeler is operated when the rider is turning the crank. Furthermore, when the rider stops turning the crank, the operation of the electric motor is interrupted due to regulatory requirements. Document US 2017 / 151998 A1 discloses a method for controlling the electric drive of a two-wheeler. Description of the invention

[0003] A method for controlling an electric drive of a two-wheeler is provided, wherein the two-wheeler can be driven via a drive wheel based on muscle force applied by a rider to a crank mechanism of the two-wheeler and a driving force from an electric drive motor provided on the two-wheeler. The method comprises the following steps: Acquiring torque data relating to the drive force at the drive wheel of the two-wheeler; determining whether the driver has requested drive force from the electric machine; determining whether a drive condition exists for the electric machine to provide drive force; controlling the electric drive machine to provide drive force after determining whether the driver has requested drive force from the electric machine and whether the drive condition exists for the electric machine to provide drive force.

[0004] The method can be applied to a two-wheeled vehicle designed as an e-bike or pedelec. In this respect, the two-wheeler can be equipped with a crank mechanism whose driving force is transmitted to a drive wheel of the two-wheeler via a transmission device. Furthermore, the two-wheeler can have an electric drive motor such that the driving force of the electric motor can be combined with the muscle power applied via the crank mechanism and delivered to the drive wheel.

[0005] According to one embodiment, the torque data can comprise at least one torque value or several torque values, which are acquired sequentially or continuously. Furthermore, the step of storing the torque data in a storage device can be provided. The at least one torque value or the several torque values ​​can be acquired by appropriate sensing means. Acquisition can take place at the drive wheel of the two-wheeler via such means. Alternatively, the torque data can be acquired at a section of the two-wheeler's drivetrain, so that this torque data allows conclusions to be drawn about the drive force at the two-wheeler's drive wheel.

[0006] According to one embodiment, the step of storing the torque data can be performed within a predetermined preceding period. This preceding period is a timeframe prior to the determination of the existence of the drive force requirement. The preceding period, during which the torque data is stored, can comprise a predetermined duration, particularly a few seconds, for example, 5 seconds. Specifically, during the torque data storage step, those torque data recorded before the predetermined preceding period can be deleted from memory. The torque data stored during the torque data storage step can then be made available for further use in the process.

[0007] According to one embodiment, a reference torque can be determined based on the torque data, in particular by determining a mean value, a maximum value, or a weighted value from the torque data stored within the predetermined period. The reference torque can then be stored and made available for use in the method. The reference torque can represent a torque that allows conclusions to be drawn about the driving force that was present at the drive wheel of the two-wheeler within the predetermined preceding period. The reference torque can be the last recorded torque value before the determination of the presence of the driving force requirement.

[0008] According to one embodiment, the time elapsed after determining whether a drive force requirement exists can be recorded. The system detects that the drive condition exists if the time elapsed after determining whether the drive force requirement exists does not exceed a predetermined duration. This predetermined duration can be preset. Alternatively, it can be variable or adjustable. In this context, the predetermined duration can be in the range of a few seconds, for example, 3 to 5 seconds. The duration can be adapted to specific requirements and is not limited to the examples given.

[0009] According to the invention, the inclination of the two-wheeler in the direction of travel relative to the horizontal is detected at the position of the two-wheeler. The system detects that the driving condition is met when the detected inclination corresponds to at least a predetermined incline value defining a gradient. Appropriate detection means, provided on the two-wheeler, can be used to detect a difference in level between the front and rear wheels of the two-wheeler. In particular, this embodiment can detect whether the two-wheeler is on an incline and determine whether the incline corresponds to at least a predetermined gradient. The predetermined gradient can be set to a value that represents a perceptible incline for the rider. This gradient could, for example, be in the range of 3-5%. Lower or higher gradient values ​​are conceivable.

[0010] According to one embodiment, a further step for determining a termination condition may be provided, wherein the control of the electric drive motor to provide the driving force is interrupted after determining the existence of the driving force requirement when determining the existence of the termination condition.

[0011] According to one embodiment, in the step of determining a termination condition, the termination condition can be determined if the time elapsed after the determination of the existence of the drive force request exceeds a predetermined duration. In this context, the time that has elapsed after the determination of the existence of the drive force request is recorded. The predetermined duration in this context can be in the range of several seconds, for example, 3 to 5 seconds.

[0012] According to one embodiment, the time elapsed after the interruption of the control of the electric machine for providing the driving force can be detected, whereby the drive condition is detected when the time elapsed after the interruption of the control of the electric machine for providing the driving force corresponds to at least a predetermined duration. In this context, it can be enabled that, after the interruption of the control of the electric machine for providing the driving force, a renewed control of the electric machine for providing the driving force cannot occur immediately. In this context, the predetermined duration can be in the range of a few seconds. Preferably, the predetermined duration in this context is in the range of 1 second.

[0013] According to one embodiment, the revolutions of one of the wheels or of a crank mechanism of the two-wheeler that occur after the interruption of the control of the electric machine providing the driving force can be detected. The drive condition is detected when the revolutions detected after the interruption of the control of the electric machine providing the driving force correspond to at least a predetermined number of revolutions. The predetermined number of revolutions of one of the wheels can, for example, correspond to one complete revolution. Alternatively, the predetermined number of revolutions of one of the wheels can correspond to several revolutions, in particular 1 to 5 revolutions. If the number of revolutions of the pedal mechanism of the two-wheeler is taken into account, a gear ratio between the pedal mechanism and the drive wheel can be considered.Therefore, the predetermined number of revolutions at the crank mechanism of the two-wheeler can be defined accordingly. For example, the predetermined number of revolutions at the crank mechanism of the two-wheeler can correspond to 5 to 10 revolutions.

[0014] According to one embodiment, the electric drive motor can be controlled taking into account the acquired torque data. In particular, the acquired torque data is considered when controlling the electric drive motor in such a way that the power output of the electric drive motor is appropriately adjusted after determining whether a drive force requirement exists.

[0015] According to one embodiment, during the actuation step of the electric drive motor, the drive force can be adjusted such that the propulsion of the two-wheeler continues after the determination of the presence of a drive force demand, starting from the drive of the two-wheeler prior to the determination of the presence of the drive force demand. In particular, this approach can prevent an interruption of the drive of the electric drive motor, for example, due to a corresponding automated control. The continuation of the control of the electric motor can be defined such that the previously present drive force at the drive wheel of the two-wheeler can be maintained within a predetermined cut-off range.

[0016] According to one embodiment, during the activation step of the electric drive motor, the drive force can be adjusted such that, after the determination of the drive force requirement, the drive force of the two-wheeler is essentially maintained at the same level as before the determination of the drive force requirement. In this embodiment, by taking the detected torque data into account when activating the electric drive motor, the drive force at the drive wheel of the two-wheeler can be maintained at a value that acts as an uninterrupted drive of the drive wheel.

[0017] According to one embodiment, the activation of the electric drive motor to provide the driving force can be permitted after determining whether the driver has requested driving force, even if the driver's input of muscle power to the crank mechanism is interrupted or the driver is not operating the crank mechanism. Due to the interruption of the driver's input of muscle power to the crank mechanism or the interruption of the driver's operation of the crank mechanism, the drive of the electric drive motor can be interrupted in conventional two-wheeled vehicles of this type.The present procedure allows this fact to be taken into account and thus defines, as a condition for controlling the electric drive motor to provide the driving force after determining whether the driver's driving force requirement exists, the interruption of the introduction of muscle power by the driver into the cranking device or the interruption of the operation of the cranking device by the driver.

[0018] According to one embodiment, the drive force request can be detected by a control element provided on the two-wheeler, wherein the control element can, in particular, be designed as a switching element with two switching positions. The switching element can be a push button. The switching element can be actuated by the rider, so that the switching element emits a signal that can be detected as a drive force request.

[0019] According to one embodiment, the drive force request can be detected by a control element provided on the two-wheeler, wherein the control element can be designed as an actuator with continuous adjustability for specifying a setpoint for the drive force of the electric drive motor. In this embodiment, the control element can be designed as an actuator with a continuous adjustment range. In particular, the control element can be designed as a rotary handle that can be operated by the rider within the adjustment range. The control element, designed as an actuator, can output a signal that represents a quantitative drive force request. In particular, the magnitude of the drive force in connection with the drive force request can be specified by the rider using the control element, which is designed as an actuator.The signal emitted by the control element designed as an actuating element can be used in the process to adjust the driving force of the drive machine in the step of controlling the electric drive machine according to the actuation of the control element designed as an actuating element.

[0020] In another embodiment, the control element can be designed with a combination of a switching element and an actuating element according to the embodiments described above.

[0021] According to a further aspect, a two-wheeled vehicle is provided, comprising a crank mechanism and an electric drive motor. The two-wheeled vehicle can be propelled by the rider's muscle power applied to the crank mechanism and by the electric drive motor via a drive wheel. The control device further comprises an input interface for receiving signals from at least one operating element and from torque data acquisition devices provided on the two-wheeled vehicle. The control device also comprises an output interface for outputting control signals to operate the electric drive motor. The control device according to this aspect is configured to carry out the method according to one or more of the preceding embodiments.

[0022] According to one embodiment, the control device can be a separate element. Alternatively, the control device can be integrated into a two-wheeler control unit that performs additional functions beyond those described above.

[0023] According to another aspect, a two-wheeler with a crank mechanism and an electric drive motor is provided. The two-wheeler can be propelled by the rider's muscle power applied to the crank mechanism and by the electric drive motor via a drive wheel. The two-wheeler according to this aspect also has a control device as described in the preceding aspect. Brief description of the characters

[0024] Figure 1 shows a schematic representation of a process for acquiring and storing torque data according to one embodiment; Figure 2 shows a schematic representation of a process for controlling an electric drive machine according to one embodiment. Detailed description of embodiments

[0025] The basic concept of the present invention will be described below with reference to the drawings. First, the starting point of the present invention will be explained.

[0026] The starting point for the basic concept of the present invention is a two-wheeled vehicle designed as a pedelec or e-bike. Such two-wheeled vehicles have a crank mechanism that can be operated by the rider's muscle power to drive a drive wheel of the two-wheeler via a transmission means, such as a chain drive. Furthermore, such two-wheeled vehicles of this type have an electric motor that is coupled to the drive wheel of the two-wheeler, so that the driving force of the electric motor can be transmitted to the drive wheel of the two-wheeler. In this respect, such two-wheeled vehicles of this type offer the possibility of combining the rider's muscle power with the driving force of the electric motor.Typically, these types of two-wheelers can be propelled solely by muscle power applied to the crank mechanism, while the electric motor is not engaged. If the rider is operating the crank mechanism, the electric motor can also be used. However, the electric motor is usually deactivated on these two-wheelers as soon as the rider stops cranking.

[0027] Previously overlooked in the operation of such two-wheelers are situations in which the crank mechanism cannot be operated due to external influences, thus immediately interrupting the entire propulsion of the two-wheeler. Such situations can arise, for example, when riding on rough terrain where there is a risk of the crank mechanism touching the ground during operation, potentially leading to an accident. If riding simultaneously uphill, an interruption of the crank mechanism's operation would result in an immediate cessation of the two-wheeler's propulsion. In certain situations, this interruption of the two-wheeler's propulsion can not only lead to a loss of comfort but can also increase the risk of accidents.

[0028] The present invention addresses the aforementioned situation. An embodiment that solves the aforementioned problem is described below.

[0029] According to the present embodiment, the two-wheeler has a control device configured to control the electric drive motor. In particular, the control device is configured to control the driving force of the electric drive unit according to predetermined specifications. For this purpose, electrical power is drawn from an electrical energy storage device mounted on the two-wheeler and supplied to the electric drive motor according to its power requirements.

[0030] Furthermore, the control unit has input interfaces designed to receive signals. One such signal is supplied by a control element on the two-wheeler, which is designed as a switch with two positions. This allows the control unit to detect whether the switch is being operated by the rider or not.

[0031] Secondly, signals indicating the torque or drive force at the rear wheel are fed to the input interfaces of the control unit. In the present embodiment, a torque sensor is provided on the drive wheel, which is the rear wheel of the two-wheeler. This sensor emits a signal representing the torque present at the rear wheel, and this signal is also fed to the control unit.

[0032] According to the present embodiment, the drive of the electric drive unit is interrupted in the usual manner by the two-wheel control device as soon as it is detected that the crank device is not being operated by the rider, in order to meet regulatory requirements.

[0033] With reference to Figure 1In step S1, the signal from the torque sensor on the drive wheel of the two-wheeler is first acquired. The torque at the drive wheel is continuously acquired. In a subsequent step S2, torque values ​​are stored at predetermined time intervals in a memory device provided in the control unit. In a non-limiting example, a torque value is stored in the memory device of the control unit every 100 ms. The storage of torque values ​​is continuous; however, torque values ​​acquired and stored before a time corresponding to a preset interval are deleted. This interval can be 5 seconds in one embodiment. Therefore, the memory device contains torque values ​​from the torque sensor on the drive wheel of the two-wheeler for the past 5 seconds.

[0034] In the present embodiment, the last torque value is defined as the reference torque.

[0035] The following describes the procedure of Figure 2 The connection to the procedural sequence is explained and its relevance to the process is discussed. Figure 1 explained. That in Figure 2 The method shown begins at startup and is carried out continuously in predetermined short intervals. After the method of Figure 2Once the process has started, step S3 determines whether a drive force requirement exists. This determination in step S3 is performed by querying the control element, which serves as the switching element. If the rider of the two-wheeler operates the control element, the query in step S3 is positive. As long as the rider does not operate the control element, the query in step S3 is negative. If the rider of the two-wheeler operates the control element, the process continues with step S4 to determine whether a drive condition exists. In the present embodiment, the query in step S4 is performed by determining the operating state of the crank mechanism. If the crank mechanism of the two-wheeler is in operation, step S4 determines that a drive condition does not exist. If step S4 determines that the crank mechanism is in operation, it determines that a drive condition exists.In this case, the procedure continues in step S5. If the queries in steps S3 and S4 are negative, the procedure returns to the start.

[0036] In step S5, the electric drive motor is controlled. In this context, as described in Figure 2 shown is the one in Figure 1 The procedure shown is taken into account. In particular, step S5, which controls the electric drive motor, considers the contents of the storage device, especially the relevant reference torque. Furthermore, step S5, which controls the electric drive motor, considers the result of step S6 for determining a termination condition, which is explained below.

[0037] If, after steps S3 and S4 have been checked, step S5 is performed to control the electric drive motor, the reference torque is first set as the target torque of the electric drive motor, which is specified in the Figure 1 The process sequence shown in step S2 was stored. Furthermore, in step S6, to determine the termination condition, it is continuously checked whether a termination condition exists for controlling the electric drive motor. If no termination condition is determined in step S6, the electric drive motor is driven based on the reference torque.

[0038] In the present embodiment, the control of the electric drive motor with the reference torque continues for a predetermined period of time. If the predetermined period of time has elapsed, step S6 determines that a termination condition exists. Therefore, after the predetermined period of time, which in the present embodiment can be in the range of 5 seconds, the control of the electric drive motor is interrupted.

[0039] The following describes a specific application of the control method according to the present embodiment. In an initial situation, the rider is riding the two-wheeler on a very uneven surface at a predetermined speed. According to a scenario, the rider realizes that the crank mechanism, and in particular the envelope of the pedals attached to the crank mechanism, would touch the ground if operation continued, which must be avoided. Thus, the rider will intuitively stop operating the crank mechanism to prevent the collision of the crank mechanism with the ground.

[0040] In this situation, a typical two-wheeler of the same type, designed as a pedelec or e-bike, would immediately interrupt the drive of the electric drive motor, as it is detected that the operation of the crank mechanism has stopped.

[0041] In the case of a two-wheeler equipped with the functionality described above, the rider will actuate the control element immediately after stopping the operation of the crank mechanism, so that the operation of the electric drive motor continues as described above with reference to the procedure of Figure 2 This was explained. In particular, the electric drive motor is operated with a drive power that takes into account the last stored torque value at the drive wheel of the two-wheeler. Thus, immediately after the control element is activated, the journey of the two-wheeler continues essentially seamlessly, thereby reducing the risk of accidents and improving riding comfort.

[0042] Due to the continued operation of the electric drive motor, the two-wheeler is moved out of the area where there is a risk of the crank mechanism colliding with the ground. Therefore, the rider can resume operating the crank mechanism as soon as the risk of collision with the ground no longer exists. For this reason, a time period is defined as the termination condition, after which the operation of the electric drive motor is interrupted if the rider does not continue to operate the crank mechanism. If the operation of the crank mechanism is resumed during this time period, the operation of the electric drive motor is restarted, as is typical for two-wheelers of this type, such as pedelecs or e-bikes.

[0043] In a different embodiment, the two-wheeler is equipped with a control element designed as an actuator with continuous adjustability for setting a target value for the drive force of the electric drive motor. Unlike the previous embodiment, in a situation as described above, the rider can actuate the actuator and thus set the drive force for continuing the propulsion of the two-wheeler. In this embodiment, the torque data specified in the Figure 1The process sequence shown in step S2 is stored, taken into account, and in particular serves as the starting torque as soon as the driver activates the actuator. In an alternative embodiment, the control of the electric drive motor can be independent of the torque data stored in step S2. In particular, this alternative allows the driver to adjust the drive force at the drive wheel of the two-wheeler by adjusting the actuator accordingly.

[0044] In another embodiment, step S4, used to determine whether a drive condition exists, determines whether a predetermined time has elapsed since the interruption of the control signal to the electric drive motor. This predetermined time can, for example, be set to 1 second. As long as this predetermined time has not elapsed since the termination of the control signal to the electric drive motor, step S5, used to control the electric drive motor, is not executed. This embodiment ensures that continuous electric drive of the two-wheeler is prevented by actuating the control element. Alternatively or additionally, the number of wheel revolutions that have occurred since the termination of the control signal to the electric drive motor can be recorded as a further drive condition determined in step S4.For example, if one of the wheels has rotated less than a predetermined number of revolutions, such as one revolution, since the termination of the electric drive's control signal, the electric drive's control signal performed in step S5 is stopped. Similarly, the number of revolutions of the crank mechanism, which could be five revolutions, for example, can be used as the drive condition for determining step S4. Thus, in this alternative embodiment, if the number of revolutions of the crank mechanism since the termination of the electric drive falls below the predetermined number, the electric drive's operation can be stopped.

[0045] In a further alternative embodiment, the incline on which the two-wheeler is currently located can be considered as a drive condition for step S4. For this purpose, it can be determined, for example, by an inclination sensor or similar detection means, whether the two-wheeler is on an incline relative to the horizontal. Thus, in step S4, for determining whether a drive condition exists, it can be taken into account that the drive condition only exists if the two-wheeler is on an incline with at least a predetermined angle of inclination. This embodiment makes the advantage of the present invention particularly clear, since the immediate interruption of the propulsion of a generic two-wheeler on an incline represents a source of danger, especially on uneven terrain.

[0046] The above concept is applicable to two-wheeled vehicles with different drive systems. In particular, various drive motors can be used, for example, a mid-drive motor and a wheel hub motor. The design of the two-wheeled vehicle to which the method is applicable is variable overall, as long as a crank mechanism and an electric drive motor are provided. Reference sign

[0047] S1 Acquisition of torque data S2 Storage of torque data S3 Determination of a drive force requirement S4 Determination of the existence of a drive condition S5 Control of the electric drive motor S6 Determination of the termination condition

Claims

1. Method for controlling an electric drive of a two-wheeled vehicle, which is driveable via a drive wheel on the basis of a muscle force of a rider introduced into a crank device of the two-wheeled vehicle and of a drive force of an electric drive machine provided on the two-wheeled vehicle, comprising the following steps: acquiring torque data (S1) relating to the drive force at the drive wheel of the two-wheeled vehicle; wherein an inclination of the two-wheeled vehicle in the direction of travel in relation to the horizontal is detected at the position of the two-wheeled vehicle, determining the presence of a drive-force demand (S3) from the rider for providing a drive force from the electric machine; determining the presence of a drive condition (S4) for providing the drive force from the electric machine; wherein it is detected that the drive condition is present if the detected inclination corresponds to at least a predetermined slope-defining inclination value, controlling the electric drive machine (S5) for providing the drive force following determination of the presence of the drive-force demand from the rider for providing a drive force from the electric machine and if the presence of the drive condition for providing the drive force from the electric machine has been determined.

2. Method according to Claim 1, wherein the torque data comprise at least one torque value or multiple torque values that are acquired in a temporal sequence or continuously, and comprising the step of storing the torque data (S2) in a memory device.

3. Method according to Claim 2, wherein the step of storing the torque data (S2) is carried out within a predetermined preceding period of time.

4. Method according to Claim 3, wherein a reference torque is determined on the basis of the torque data, said reference torque being determined in particular by determination of an average value, a maximum value or a weighted value from the torque data stored within the predetermined period of time.

5. Method according to one of the preceding claims, wherein the elapsed time following determination of the presence of the drive-force demand is detected, wherein it is detected that the drive condition is present if the elapsed time following determination of the presence of the drive-force demand does not exceed a predetermined duration.

6. Method according to one of the preceding claims, further comprising a step for determining a termination condition (S6), wherein the step of controlling the electric drive machine (S5) for providing the drive force following determination of the presence of the drive-force demand is interrupted if the presence of the termination condition is determined.

7. Method according to Claim 6, wherein, in the step for determining a termination condition (S6), the termination condition is determined if the elapsed time following determination of the presence of the drive-force demand exceeds a predetermined duration.

8. Method according to Claim 6 or 7, wherein the elapsed time following the interruption of the control of the electric machine for providing the drive force is detected, wherein it is detected that the drive condition is present if the elapsed time following the interruption of the control of the electric machine for providing the drive force corresponds to at least a predetermined duration.

9. Method according to Claim 6 or 7, wherein the revolutions at one of the wheels or at a crank device of the two-wheeled vehicle that are realized following the interruption of the control of the electric machine for providing the drive force are detected, wherein it is detected that the drive condition is present if the revolutions detected following the interruption of the control of the electric machine for providing the drive force correspond to at least a predetermined number of revolutions.

10. Method according to one of the preceding claims, wherein the step of controlling the electric drive machine (S5) is carried out with account taken of the acquired torque data.

11. Method according to Claim 10, wherein, in the step of controlling the electric drive machine (S5), the drive force is set in such a way that, following determination of the presence of the drive-force demand, the drive of the two-wheeled vehicle is continued on the basis of the drive of the two-wheeled vehicle prior to the determination of the presence of the drive-force demand.

12. Method according to Claim 10 or 11, wherein, in the step of controlling the electric drive machine (S5), the drive force is set in such a way that, following determination of the presence of the drive-force demand, the drive force of the two-wheeled vehicle is maintained substantially at the drive force of the two-wheeled vehicle prior to the determination of the presence of the drive-force demand.

13. Method according to one of the preceding claims, wherein the step of controlling the electric drive machine (S5) for providing the drive force following determination of the presence of the drive-force demand from the rider is permitted if the introduction of muscle force by the rider into the crank device has been interrupted or the crank device is not operated by the rider.

14. Method according to one of the preceding claims, wherein the drive-force demand is detected by a control element provided on the two-wheeled vehicle, wherein the control element is designed in particular as a switching element with two switching positions.

15. Method according to one of Claims 1-14, wherein the drive-force demand is detected by a control element provided on the two-wheeled vehicle, wherein the control element is designed as an actuating element with continuous settability for predefining a target value of the drive force of the electric drive machine.

16. Control device for a two-wheeled vehicle which has a crank device and has an electric drive machine, wherein the two-wheeled vehicle is driveable via a drive wheel by way of muscle force of a rider of the two-wheeled vehicle introduced into the crank device and of a drive force of the electric drive machine, having an input interface for receiving signals at least from a control element and from means for acquiring torque data provided on the two-wheeled vehicle, and having an output interface for outputting control signals for controlling the electric drive machine; wherein the control device is configured for carrying out the method according to one of the preceding claims.

17. Two-wheeled vehicle having a crank device and having an electric drive machine, wherein the two-wheeled vehicle is driveable via a drive wheel by way of muscle force of a rider of the two-wheeled vehicle introduced into the crank device and of a drive force of the electric drive machine, further having a control device according to Claim 16.