CN112752672A

CN112752672A - Electric vehicle

Info

Publication number: CN112752672A
Application number: CN201980063827.8A
Authority: CN
Inventors: 市川广基
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2018-09-28
Filing date: 2019-08-28
Publication date: 2021-05-04
Also published as: DE112019004855T5; TW202019741A; JP7050173B2; WO2020066434A1; TWI725555B; JPWO2020066434A1

Abstract

The electric vehicle (10) is driven by a rotating electric machine (18). The electric vehicle (10) further comprises: a rotating electrical machine (18); a drive prohibition processing unit (88b) that, during travel of the electric vehicle (10), transitions to a suppression state in which drive of the electric vehicle (10) is prohibited; and a resume drive processing unit (88c) that resumes driving of the electric vehicle (10) when the suppression state has been released during traveling of the electric vehicle (10).

Description

Electric vehicle

Technical Field

The present invention relates to an electric vehicle driven by a rotating electric machine.

Background

For example, a technique of stopping all controls in a vehicle when a stop switch is pressed is disclosed in japanese patent laid-open publication No. 2010-120597.

Disclosure of Invention

However, in an electric vehicle driven by a rotating electric machine, during running of the electric vehicle, if a stop switch is pressed, a transition is made to a drive prohibition state (hereinafter, also referred to as a suppression state) in which driving of the electric vehicle is prohibited. Accordingly, the electric vehicle stops. After that, if the start switch is pressed, the output of the rotating electric machine is transmitted to the drive wheel, and the electric vehicle can be driven. Therefore, in order to recover the drive of the electric vehicle from the suppressed state, the electric vehicle needs to be temporarily stopped. As a result, even if the suppression state is released during the travel of the electric vehicle, the electric vehicle cannot be quickly returned to the driving state.

Therefore, an object of the present invention is to provide an electric vehicle that can be quickly returned from a suppressed state to a driven state during traveling of the electric vehicle.

The technical scheme of the invention is as follows: an electric vehicle driven by a rotating electric machine, comprising: a drive prohibition processing unit that shifts the electric vehicle to a suppression state in which driving of the electric vehicle is prohibited during traveling of the electric vehicle; and a resume drive processing portion that resumes driving of the electric vehicle when the suppression state has been released during traveling of the electric vehicle.

According to the present invention, when the suppression state is released while the electric vehicle is traveling, the electric vehicle can be quickly returned to driving without stopping the electric vehicle.

The above objects, features and advantages will be readily understood by the following description of the embodiments with reference to the accompanying drawings.

Drawings

Fig. 1 is a left side view of the electric vehicle according to the present embodiment.

Fig. 2 is a rear view of a front portion of the electric vehicle of fig. 1.

Fig. 3 is a block diagram of the electric vehicle of fig. 1.

Fig. 4 is a state transition diagram showing an operation of the electric vehicle shown in fig. 1 to 3.

Detailed Description

A preferred embodiment of an electric vehicle according to the present invention will be described below with reference to the drawings.

[1 ] schematic configuration of electric vehicle 10 according to the present embodiment ]

Fig. 1 is a left side view of an electric vehicle 10 according to the present embodiment. In the following description, the front-rear, left-right, and up-down directions will be described in terms of directions viewed by a driver seated on the seat 12 of the electric vehicle 10. In the electric vehicle 10, a pair of left and right components are denoted by the letter "L", and the right component is denoted by the letter "R".

The electric vehicle 10 is a straddle-type electric motorcycle, and travels by rotating the rear wheel 14 by the driving force of a rotating electric machine 18 built in a swing arm (swing arm)16 that pivotally supports the rear wheel 14. The electric vehicle 10 according to the present embodiment is not limited to the electric motorcycle shown in fig. 1, and may be applied to various electric vehicles driven by the rotating electric machine 18.

The electric vehicle 10 includes a synthetic resin body cover 20 that covers a body frame, not shown. A handle 22 is provided in front of the electric vehicle 10. The driver operates the handle 22 to steer the front wheel 26 pivotally supported by the pair of left and right front forks 24L, 24R.

The seat 12 also functions as a lid portion of a storage box, not shown. The seat 12 is rotated about an axis not shown, so that the upper side of the storage box can be opened. Further, a battery 28 of the electric vehicle 10 is supported by the vehicle body frame inside the vehicle body cover 20 and directly below the seat 12. In body cover 20, a cover 30 is provided at a portion over which both feet of a driver seated on seat 12 straddle. By opening the cover 30 and inserting a charging plug into the charging port 32, the battery 28 can be charged from an external power supply via the charging plug and the charging port 32.

A PCU (power control unit) 34 as a power supply control device that converts direct current power of the battery 28 into alternating current power and supplies the alternating current power to the rotating electric machine 18 is supported on the vehicle body frame inside the vehicle body cover 20 and behind the battery 28. Details of the PCU34 will be described later.

The front end portion of the rocker arm 16 is pivotally supported by a pivot shaft 36 attached to the vehicle body frame below the battery 28 and the PCU 34. The rocker arm 16 is a cantilevered rocker arm extending from the front end portion to the left side of the rear wheel 14. The rear end of the swing arm 16 pivotally supports the rear wheel 14. A rotating electrical machine 18, which is a three-phase ac motor, is housed on the rear end portion side of the rocker arm 16 on the left side of the rear wheel 14. Further, the rear end portion of the swing arm 16 is supported by the vehicle body frame via a rear cushion 38.

The rotating electric machine 18 is driven (rotated) by ac power supplied from the PCU34 during power running. The electric vehicle 10 can be driven (driven) by transmitting the driving force (output) of the rotating electric machine 18 to the rear wheel 14 to rotate the rear wheel 14. On the other hand, the rotating electrical machine 18 functions as a generator during regeneration, and supplies the generated ac power to the PCU 34. The PCU34 converts alternating current power to direct current power to charge the battery 28.

In the electric vehicle 10, a side support 40 is provided at a lower left portion of the battery 28. The side stay 40 changes between a non-stored state in which it supports the electric vehicle 10 in a stopped state and a stored state in which the electric vehicle 10 can travel by rotating about the shaft 42. In fig. 1, the non-stored state is shown by a solid line, and the stored state is shown by a two-dot chain line.

In the electric vehicle 10, a main stay 44 is provided below the PCU 34. The main support 44 changes between a non-stored state in which it supports the electric vehicle 10 in a stopped state and a stored state in which the electric vehicle 10 can travel by rotating about the shaft 46. In fig. 1, the non-stored state is shown by a solid line, and the stored state is shown by a two-dot chain line.

[2. Structure around handlebar 22 ]

Fig. 2 is a rear view of a front portion (around the handlebar 22) of the electric vehicle 10. The main switch 50 is provided on the right side of the front portion of the body cover 20 at a position below the handlebar 22. Further, a meter 52 is provided in a portion of the body cover 20 in front of the handle 22.

The handlebar 22 includes a handlebar stem 54 extending in the left-right direction, a right grip portion 56R (hereinafter, also referred to as a throttle grip 56R.) provided at the right end portion of the handlebar stem 54, and a left grip portion 56L provided at the left end portion of the handlebar stem 54.

The right grip portion (throttle) 56R is a grip that the occupant holds with the right hand, and is a throttle grip for instructing the rotating electric machine 18 to adjust the output. That is, when the occupant turns the throttle grip 56R clockwise (toward the occupant) about the axis of the handlebar 54, for example, as viewed from the left side of fig. 1, the throttle valve is opened, and the output of the rotating electric machine 18 can be increased. On the other hand, when the throttle grip 56R returns to the initial position, the throttle valve is in the closed state, and the output (rotation) of the rotating electric machine 18 can be stopped.

A right switch case 58R is provided at the base end portion of the throttle grip 56R of the handlebar 54. A seesaw switch 60 is disposed behind (on the passenger side of) the right switch case 58R. One side (lower side) of the seesaw switch 60 functions as a start switch 60 a. The other side (upper side) of the seesaw switch 60 functions as a stop switch 60 b. That is, when the seesaw switch 60 is tilted downward, the start switch 60a can be pressed (turned on). When the seesaw switch 60 is tilted upward, the stop switch 60b can be pressed (turned on).

The left grip portion 56L is a grip held by the left hand of the occupant. A left switch case 58L is provided at a base end portion of the left grip portion 56L of the handlebar 54. Various switches 62 related to the traveling of the electric vehicle 10 are also arranged behind the left switch box 58L.

In the example of fig. 2, a case where a part of the seesaw switch 60 is used as the start switch 60a and the stop switch 60b is illustrated, but in the present embodiment, the start switch 60a and the stop switch 60b may be separately provided. In the present embodiment, the seesaw switch 60 or the start switch 60a and the stop switch 60b provided separately may be provided in the left switch case 58L.

As shown in fig. 1 and 2, the handle bar 54 is provided with rear view mirrors 64L and 64R at a position near the left switch case 58L and a position near the right switch case 58R, respectively.

[3 ] Structure relating to Electrical control of electric vehicle 10 ]

Fig. 3 is a block diagram of the electric vehicle 10 according to the present embodiment. The electric vehicle 10 also has a side support switch 70, a throttle opening sensor 72, a seat switch 74, a lid switch 76, a plug switch 78, a rotation angle sensor 80, and a dump sensor 82. The side support switch 70, the seat switch 74, the lid switch 76, and the plug switch 78 are all switches for detection.

The main switch 50 is a switch for system activation of the electric vehicle 10, and when the driver turns (turns on) the knob, the main switch 50 outputs an activation instruction signal to the PCU 34. The start switch 60a is a switch for instructing the rotary electric machine 18 to start driving. When the driver turns on the start switch 60a by tilting the seesaw switch 60 downward, the start switch 60a outputs a drive instruction signal to the PCU 34. The stop switch 60b is a cut-off switch for instructing the rotary electric machine 18 to stop driving. When the driver turns on the stop switch 60b by tilting the seesaw switch 60 upward, the stop switch 60b outputs a stop instruction signal to the PCU 34.

When the side support 40 is in the stored state, the side support switch 70 outputs an on signal indicating the stored state to the PCU 34. When the side support 40 is in the non-storage state, the side support switch 70 outputs a disconnection signal indicating the non-storage state to the PCU 34. In the following description, for convenience of explanation, a state in which the output of the on signal is stopped will be described as a state in which the off signal is output.

The throttle opening sensor 72 detects the amount of rotation of the throttle grip 56R (the opening of the throttle valve), and outputs the detection result to the PCU 34.

When the vehicle seat 12 covers the storage box from above and an occupant can sit on the storage box, the vehicle seat switch 74 outputs an on signal indicating that to the PCU 34. When the seat 12 is rotated to open the upper side of the housing box, the seat switch 74 outputs an off signal indicating that to the PCU 34.

When the lid 30 is opened, the lid switch 76 outputs an off signal indicating that to the PCU 34. When lid 30 is closed, lid switch 76 outputs an on signal indicating that to PCU 34.

When the charging plug is inserted into charging port 32, plug switch 78 outputs an on signal indicating the insertion to PCU 34. When the charging plug is not inserted into the charging port 32, the plug switch 78 outputs an off signal indicating that to the PCU 34.

The rotation angle sensor 80 is, for example, a resolver (resolver), and sequentially detects the rotation angle of the rotor constituting the rotating electric machine 18, and outputs the detection result to the PCU 34. The tilt sensor 82 sequentially detects the tilt angle (bank angle) of the electric vehicle 10, and outputs the detection result to the PCU 34.

The PCU34 has a DC/DC converter 84, an inverter 86, and a control unit 88. The DC/DC converter 84 converts the DC voltage of the battery 28 into a DC voltage of a desired voltage value and outputs the DC voltage to the inverter 86, thereby supplying DC power to the inverter 86. The inverter 86 converts the direct current supplied from the DC/DC converter 84 into three-phase alternating current, and supplies the three-phase alternating current to the rotating electrical machine 18.

The control unit 88 executes a program stored in a memory, not shown, to realize the functions of the rotating electric machine control unit 88a, the drive prohibition processing unit 88b, the return drive processing unit 88c, the travel state determination unit 88d, and the falling state determination unit 88 e. The control unit 88 controls the DC/DC converter 84 and the inverter 86 based on information or signals from the

sensors

72, 80, 82 and the

switches

50, 60a, 60b, 70, 74, 76, 78, thereby rotating the rotating electrical machine 18 or stopping the rotation of the rotating electrical machine 18.

Specifically, the running state determination unit 88d determines the running state of the electric vehicle 10 based on the signals output from the

switches

50, 60a, 60b, 70, 74, 76, and 78 and the detection result of the rotation angle sensor 80. The tilting state determination unit 88e determines whether the electric vehicle 10 is tilted or not, based on the tilt angle detected by the tilting sensor 82.

The drive prohibition processing unit 88b determines a transition to a suppression state in which the drive of the electric vehicle 10 is prohibited, based on information or signals from the

sensors

72, 80, and 82, the

switches

50, 60a, 60b, 70, 74, 76, and 78, and the determination results of the traveling state determination unit 88d and the falling state determination unit 88e, and notifies the rotating electric machine control unit 88a of the determination result. The return drive processing unit 88c determines whether or not the suppression state of the electric vehicle 10 has been released, based on the information or signals from the

sensors

72, 80, and 82 and the

switches

50, 60a, 60b, 70, 74, 76, and 78, and the determination results of the traveling state determination unit 88d and the toppling state determination unit 88 e. When determining that the suppression state has been released, the resume drive processing unit 88c determines to resume driving of the electric vehicle 10, and notifies the rotating electric machine control unit 88a of the determination result.

The rotating electric machine control unit 88a controls the DC/DC converter 84 and the inverter 86 in accordance with the rotation amount of the throttle grip 56R and the rotation angle of the rotor of the rotating electric machine 18.

When receiving the notification of the transition to the suppression state from the drive prohibition processing unit 88b, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 to stop the rotation of the rotating electrical machine 18 and stop the driving of the rear wheels 14. In the following description, the phrase "prohibiting the driving of the electric vehicle 10" means prohibiting the driving of the rear wheels 14 by prohibiting the transmission of the driving force from the rotating electric machine 18 to the rear wheels 14 by stopping the rotation of the rotating electric machine 18.

When receiving the notification of the resumption of the driving of the electric vehicle 10 from the resumption driving processing unit 88c, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 to resume the rotation of the rotating electrical machine 18, thereby resuming the driving of the rear wheels 14. In the following description, the phrase "to resume driving of the electric vehicle 10" means that the rotating electric machine 18 is brought into a rotatable state, and the driving force can be transmitted from the rotating electric machine 18 to the rear wheels 14, thereby resuming driving of the rear wheels 14.

As described above, the rotating electrical machine control unit 88a performs normal control for rotating the rotating electrical machine 18 with respect to the DC/DC converter 84 and the inverter 86 as long as it does not receive a notification from the drive prohibition processing unit 88 b. The rotating electrical machine control unit 88a stops the rotation of the rotating electrical machine 18 and prohibits the driving of the electric vehicle 10 during a time period from when the notification is received to when the notification of the drive resumption processing unit 88c is received.

Here, the suppression state of the electric vehicle 10 before traveling is a state in which the electric vehicle 10 is prohibited from starting traveling (starting driving) even if the driver instructs the electric vehicle 10 to start traveling by, for example, turning the throttle grip 56R. The suppressed state during travel of the electric vehicle 10 is a state in which the electric vehicle 10 is prohibited from being driven even if the driver instructs to drive the electric vehicle 10 by, for example, turning the throttle grip 56R. Therefore, in the restrained state during traveling, the electric vehicle 10 is caused to coast without transmitting the driving force from the rotating electric machine 18 to the rear wheels 14.

In the following description, the term "during travel of the electric vehicle 10" is a concept including a state in which the electric vehicle 10 travels by the rotation of the rotating electric machine 18, a state in which the electric vehicle 10 coasts by stopping the rotation of the rotating electric machine 18, and a state in which the electric vehicle 10 in the traveling state temporarily stops at an intersection or the like.

The control unit 88 causes the meter 52 to display information or signals (for example, vehicle speed corresponding to the rotation angle) of the

sensors

72, 80, 82 and the

switches

50, 60a, 60b, 70, 74, 76, 78, and processing results of the respective units in the control unit 88.

[4. operation of electric vehicle 10 ]

The operation of the electric vehicle 10 according to the present embodiment configured as described above will be described with reference to fig. 4. Here, the transition to the suppression state and the return to driving of the electric vehicle 10 from the suppression state during traveling of the electric vehicle 10 after the driver turns on the main switch 50 (see fig. 2 and 3) will be described. In the description of fig. 4, the description will be given with reference to fig. 1 to 3 as needed.

<4.1 actions in Steps S1 and S2 >

First, in step S1, when the driver seated in seat 12 turns on main switch 50, a start instruction signal is output from main switch 50 to PCU 34. PCU34 receives supply of dc power from battery 28 in response to the start instruction signal, and starts the operation. PCU34 supplies the dc power of battery 28 to each electric component in electric vehicle 10 such as meter 52. As a result, the PCU34 transitions to a state of waiting for the output of the drive instruction signal from the start switch 60a in step S2. That is, when the main switch 50 is turned on in step S1, it is determined that the condition T1 for system activation is satisfied, and the PCU34 transitions to the state of waiting for the output of the drive instruction signal in step S2.

<4.2 actions in Steps S3-S8 >

As described above, the start switch 60a outputs a drive instruction signal instructing the PCU34 to start rotating the rotary electric machine 18 by the operation of the driver. Therefore, step S2 is a state before the electric vehicle 10 travels. Therefore, in step S2, when the driver performs some operation to instruct the electrically powered vehicle 10 to travel while the start switch 60a is not on, the drive prohibition processing unit 88b prohibits the electrically powered vehicle 10 from shifting to the suppression state. In step S2, when the electrically powered vehicle 10 is in the travel disabled state, the drive prohibition processing unit 88b prohibits the electrically powered vehicle 10 from shifting to the suppression state. In this case, the travel state determination unit 88d may determine that the electrically powered vehicle 10 is in the travel stopped state (state before travel) based on the rotation angle detected by the rotation angle sensor 80, and may notify the drive prohibition processing unit 88b of the determination result.

Specifically, when an off signal is output from the side support switch 70 to the PCU34 (condition T2), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because the side support switch 70 is in the non-storage state. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T2), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S3.

On the other hand, in step S3, when an on signal is output from the side support switch 70 to the PCU34 and a drive instruction signal is not output from the start switch 60a to the PCU34 (condition T3), the side support switch 70 is in the storage state, and therefore if the start switch 60a is turned on, the resume drive processing unit 88c determines that the electric vehicle 10 can be driven. That is, the recovery drive processing unit 88c determines that the suppression state due to the non-storage state of the side stay 40 has been released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T3), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S3.

When the off signal is output from the lid switch 76 to the PCU34 (condition T4), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because there is a possibility that the battery 28 will be started to be charged with the lid 30 open. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T4), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S4.

On the other hand, when an on signal is output from the lid switch 76 to the PCU34 in step S4 (condition T5), the lid 30 blocks the charging port 32, and therefore if the start switch 60a is turned on, the resume drive processing unit 88c determines that the electric vehicle 10 is able to travel. That is, the recovery drive processing unit 88c determines that the suppression state due to the opening of the lid 30 is released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T5), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S4.

When a detection result indicating that the throttle grip 56R is being turned (throttle opened) is output from the throttle opening sensor 72 to the PCU34 (condition T6), the prohibition-drive processing unit 88b determines that the electric vehicle 10 cannot travel because the start switch 60a is not turned on but there is an instruction to adjust the output of the rotating electric machine 18. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T6), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S5.

On the other hand, when a detection result indicating that the throttle grip 56R has returned to the initial position (the throttle valve is closed) is output from the throttle opening sensor 72 to the PCU34 in step S5 (condition T7), the resumption driving processing unit 88c determines that the electric vehicle 10 is able to travel when the start switch 60a is turned on. That is, the resume drive processing portion 88c determines that the suppression state by the rotation of the throttle grip 56R has been released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T7), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S5.

When an off signal is output from the seat switch 74 to the PCU34 (condition T8), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because the seat 12 is in the open state. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T8), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S6.

On the other hand, when an on signal is output from the seat switch 74 to the PCU34 in step S6 (condition T9), the vehicle seat 12 blocks the storage box, and therefore the resume drive processing unit 88c determines that the electric vehicle 10 can travel when the start switch 60a is turned on. That is, the resume drive processing unit 88c determines that the suppression state due to the seat 12 being opened has been released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T9), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S6.

When a stop instruction signal is output from the stop switch 60b to the PCU34 (condition T10), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because the output of the rotating electric machine 18 is instructed to stop although the start switch 60a is not turned on. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T10), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S7.

On the other hand, in step S7, if the stop instruction signal and the drive instruction signal are not output from the stop switch 60b and the start switch 60a to the PCU34, respectively (condition T11), the resume drive processing unit 88c determines that the electric vehicle 10 can travel if the start switch 60a is turned on because there is no instruction to stop the output of the rotating electrical machine 18. That is, the resume drive processing unit 88c determines that the suppression state by the stop switch 60b has been released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T11), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S7.

When an on signal is output from the plug switch 78 to the PCU34 (condition T12), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because the charging plug is inserted into the charging port 32 and the battery 28 is in the charging state. Next, the drive prohibition processing unit 88b determines to shift the electrically powered vehicle 10 to the suppression state based on the determination result (satisfaction of the condition T12), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from step S2 to the suppression state of step S8.

On the other hand, when an off signal is output from the plug switch 78 to the PCU34 in step S8 (condition T13), the charging plug is pulled out from the charging port 32, and therefore, when the start switch 60a is turned on, the resume drive processing unit 88c determines that the electric vehicle 10 is able to travel. That is, the recovery drive processing unit 88c determines that the suppression state by the charging plug has been released. Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T13), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds to step S2 from step S8.

In each of the suppression states of steps S3 to S8, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 so that the rotating electrical machine 18 does not rotate, that is, so that the transmission of the driving force from the rotating electrical machine 18 to the rear wheels 14 is prevented, in accordance with the notification from the drive prohibition processing unit 88 b.

<4.3 actions in Steps S9 and S10 >

In step S2, when the driver presses start switch 60a, a drive instruction signal is output from start switch 60a to PCU 34. The rotation angle sensor 80 sequentially detects the rotation angle of the rotor of the rotating electric machine 18, and outputs the detection result to the PCU 34. In this case, since the electric vehicle 10 is in a state before traveling, the rotation of the rotating electrical machine 18 is stopped. Therefore, the running state determination unit 88d determines that the start of running of the electric vehicle 10 is instructed based on the drive instruction signal and the rotation angle (condition T14). Then, the traveling state determination unit 88d notifies the rotating electric machine control unit 88a of the determination result.

The rotating electrical machine control unit 88a can recognize that the state in which the DC/DC converter 84 and the inverter 86 can be controlled to rotate the rotating electrical machine 18 has been reached, based on the notification from the traveling state determination unit 88 d. In this manner, the electrically powered vehicle 10 receives the satisfaction of the condition T14, and shifts from step S2 to step S9. Further, step S9 refers to a state in which the rotating electrical machine 18 stops rotating in the state of the electric vehicle 10 during traveling.

In step S9, when the driver rotates the throttle grip 56R, the throttle opening sensor 72 detects the amount of rotation of the throttle grip 56R and outputs the detection result to the PCU 34. The rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 based on the detection results of the throttle opening sensor 72 and the rotation angle sensor 80, and rotates the rotating electrical machine 18 (condition T15). When the condition T15 is satisfied, the rotating electric machine 18 starts rotating and transmits the driving force to the rear wheel 14. Accordingly, the rear wheel 14 is driven to start the running (driving) of the electric vehicle 10, and the electric vehicle 10 shifts from step S9 to step S10. Further, step S10 refers to a state in which the rotating electrical machine 18 is rotating in the state of the electric vehicle 10 during traveling.

In step S10, when the driver returns the throttle grip 56R to the initial position, the rotating electric machine control unit 88a controls the DC/DC converter 84 and the inverter 86 to stop the rotation of the rotating electric machine 18 (condition T16). When the condition T16 is satisfied, the rotary electric machine 18 stops rotating and stops transmitting the driving force to the rear wheels 14. Accordingly, the driving of the rear wheels 14 is stopped, and the electric vehicle 10 shifts from step S10 to step S9.

Therefore, after the driver operates the start switch 60a, the electric vehicle 10 shifts between step S9 and step S10. In the present embodiment, when the driver operates the start switch 60a and the rotating electrical machine 18 starts rotating in step S2 (condition T17), the process may be shifted directly from step S2 to step S10.

<4.4 actions in Steps S11 and S12 >

When an off signal is output from the side stand switch 70 to the PCU34 in steps S9 and S10 (conditions T18 and T19), the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel because the side stand 40 is in the non-storage state. Next, the drive prohibition processing unit 88b determines to shift the electric vehicle 10 during traveling to the suppression state based on the determination result (the conditions T18 and T19 are satisfied), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from steps S9 and S10 to the suppression state of step S11.

In step S11, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 so that the rotating electrical machine 18 does not rotate, in accordance with the notification from the drive prohibition processing unit 88 b. Accordingly, transmission of the driving force from the rotating electrical machine 18 to the rear wheel 14 is prohibited. Further, when the process proceeds from step S9 to step S11, the electric vehicle 10 is kept in the temporarily stopped state. When the process proceeds from step S10 to step S11, the electric vehicle 10 coasts.

In step S11, (1) an on signal is output from the side support switch 70 to the PCU34, (2) the running state determination unit 88d determines that the rotation of the rotary electric machine 18 is stopped based on the detection result of the rotation angle sensor 80, (3) a drive instruction signal is output from the start switch 60a to the PCU34 due to the operation of the start switch 60a by the driver, and (4) the resume drive processing unit 88c determines that the suppression state by the side support switch 70 has been released when the throttle is closed (the throttle grip 56R is returned to the initial position) (condition T20), and therefore, the electric vehicle 10 can run.

Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T20), and notifies the rotating electric machine control unit 88a of the determination result. As a result, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 in response to the notification from the recovery drive processing unit 88c, and returns the rotating electrical machine 18 to a rotatable state. That is, the state of the electric vehicle 10 shifts from step S11 to step S9. In this manner, when the drive is resumed from the suppressed state, the state is returned from the suppressed state of step S11 to the running state of step S9 without going through the stopped state of step S2.

On the other hand, in step S11, when (1) an on signal is output from the side support switch 70 to the PCU34, (2) the running state determination unit 88d determines that the rotating electrical machine 18 is rotating based on the detection result of the rotation angle sensor 80, (3) a drive instruction signal is output from the start switch 60a to the PCU34 by the operation of the start switch 60a by the driver, and (4) the throttle is closed (condition T21), the resume drive processing unit 88c determines that the suppression state by the side support switch 70 has been released, and the electric vehicle 10 can run.

Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T21), and notifies the rotating electric machine control unit 88a of the determination result. In this case, the rotating electrical machine control unit 88a also controls the DC/DC converter 84 and the inverter 86 in response to the notification from the recovered drive processing unit 88c, and returns the rotating electrical machine 18 to a rotatable state. In this case, the electric vehicle 10 also does not go through the stop state of step S2, and the process proceeds from step S11 to step S10.

Further, in steps S9 and S10, when the driver operates the stop switch 60b and a stop command signal is output from the stop switch 60b to the PCU34 (conditions T22 and T23), the stop switch 60b is operated to instruct the rotating electric machine 18 to stop rotating, and therefore the drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel. Next, the drive prohibition processing unit 88b determines to shift the electric vehicle 10 during traveling to the suppression state based on the determination result (the conditions T22 and T23 are satisfied), and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from steps S9 and S10 to the suppression state of step S12.

In step S12, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 so that the rotating electrical machine 18 does not rotate, in accordance with the notification from the drive prohibition processing unit 88 b. In this case, since the driving force is not transmitted from the rotating electric machine 18 to the rear wheel 14, the electric vehicle 10 is kept in the temporarily stopped state when the process proceeds from step S9 to step S12. When the process proceeds from step S10 to step S12, the electric vehicle 10 coasts.

In step S12, when (1) the stop instruction signal is stopped from being output from the stop switch 60b to the PCU34, (2) the running state determination unit 88d determines that the rotating electrical machine 18 is rotating based on the detection result of the rotation angle sensor 80, (3) the drive instruction signal is output from the start switch 60a to the PCU34 by the operation of the start switch 60a by the driver, and (4) the throttle is closed (condition T24), the resume drive processing unit 88c determines that the suppression state by the stop switch 60b has been released, and the electric vehicle 10 can run.

Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T24), and notifies the rotating electric machine control unit 88a of the determination result. As a result, the rotating electrical machine control unit 88a controls the DC/DC converter 84 and the inverter 86 in response to the notification from the recovery drive processing unit 88c, and returns the rotating electrical machine 18 to a rotatable state. In this case, the electric vehicle 10 does not pass through the stop state of step S2, and proceeds from step S12 to step S10.

In step S12, when (1) the output of the stop instruction signal from the stop switch 60b to the PCU34 is stopped, (2) the traveling state determination unit 88d determines that the rotating electrical machine 18 stops rotating based on the detection result of the rotation angle sensor 80, and (3) the throttle is closed (condition T25), the resumption driving processing unit 88c determines that the suppression state by the stop switch 60b has been released, and the electric vehicle 10 is in the stopped state.

Next, the return drive processing unit 88c determines to return the electric vehicle 10 from the suppressed state to the drive state based on the determination result (satisfaction of the condition T25), and notifies the rotating electric machine control unit 88a of the determination result. In this case, the electric vehicle 10 proceeds from step S12 to step S2.

<4.4 action of step S13 >

In steps S2, S9, and S10, when the inclination angle detected by the tilt sensor 82 exceeds the threshold angle, the tilt state determination unit 88e determines that the electric vehicle 10 is in the tilt state, and notifies the drive prohibition processing unit 88b of the determination result. The drive prohibition processing unit 88b determines that the electric vehicle 10 cannot travel (the conditions T26 to T28 are satisfied) in response to the determination result, and notifies the rotating electric machine control unit 88a of the determination result. Accordingly, the process proceeds from steps S2, S9, and S10 to the suppression state of step S13.

[5. effect of the present embodiment ]

The effects of the electrically powered vehicle 10 according to the present embodiment described above will be described.

The electric vehicle 10 according to the present embodiment is an electric vehicle 10 driven by a rotating electric machine 18, and includes: a drive prohibition processing unit 88b that shifts to a suppression state in which the drive of the electric vehicle 10 is prohibited during the travel of the electric vehicle 10; and a recovery drive processing unit 88c that, when the suppression state has been released during travel of the electric vehicle 10, causes the electric vehicle 10 to recover drive. Accordingly, when the suppression state is released while the electric vehicle 10 is traveling, the electric vehicle 10 can be quickly returned to driving without stopping the electric vehicle 10.

The electric vehicle 10 also has a throttle grip 56R (right grip portion 56R, throttle) that adjusts the output of the rotating electric machine 18. In this case, when the throttle has been closed after the shift to the suppression state during the travel of the electric vehicle 10 (steps S9, S10 → steps S11, S12 of fig. 4), the resumption drive processing portion 88c determines that the suppression state has been released and resumes the drive of the electric vehicle 10 (steps S11, S12 → steps S9, S10). Accordingly, it is possible to prevent the electric vehicle 10 from jumping out accidentally and running after the electric vehicle 10 resumes driving.

In addition, the electric vehicle 10 further includes a stop switch 60b for stopping the rotation of the rotating electric machine 18. In this case, when the stop switch 60b is pressed while the electric vehicle 10 is traveling, the drive prohibition processing portion 88b prohibits the electric vehicle 10 from shifting to the suppression state (steps S9, S10 → step S12). Accordingly, the driving of the electric vehicle 10 can be stopped according to the intention of the driver.

In addition, the electric vehicle 10 further includes a start switch 60a for starting rotation of the rotating electric machine 18. In this case, when the start switch 60a is pressed after the shift to the suppression state is made while the electric vehicle 10 is traveling (steps S9, S10 → steps S11, S12), the resume drive processing unit 88c determines that the suppression state has been released and resumes the driving of the electric vehicle 10 (steps S11, S12 → steps S9, S10). Accordingly, the electric vehicle 10 can be quickly returned to driving according to the intention of the driver.

In addition, the electric vehicle 10 also has a side support 40. When the side stay 40 is in the non-storage state during the travel of the electric vehicle 10, the drive prohibition processing portion 88b shifts the electric vehicle 10 to the suppression state (steps S9, S10 → step S11). Accordingly, even if the side stay 40 is accidentally brought into the non-storage state during the travel of the electric vehicle 10, the electric vehicle 10 can be promptly stopped from being driven.

In this case, when the side stay 40 is in the stored state after the shift to the suppression state during the travel of the electric vehicle 10, the return drive processing unit 88c determines that the suppression state has been released, and thereby the electric vehicle 10 can be quickly returned to the drive (step S11 → steps S9, S10).

The present invention has been described above with reference to preferred embodiments, but the technical scope of the present invention is not limited to the description of the above embodiments. It will be apparent to those skilled in the art that various changes and modifications can be made in the above embodiments. As is apparent from the description of the embodiments, the embodiments to which such changes or improvements are applied can be included in the technical scope of the present invention. In addition, the numerals in parentheses in the claims are given by the numerals in the drawings for easy understanding of the present invention, and the present invention is not to be construed as being limited to the elements given the numerals.

[ description of reference numerals ]

10: an electric vehicle; 18: a rotating electric machine; 40: side support; 56R: a throttle grip (right grip portion, throttle); 60 a: starting a switch; 60 b: a stop switch; 88 b: a drive prohibition processing unit; 88 c: and a resume drive processing unit.

Claims

1. An electric vehicle (10) driven by a rotating electric machine (18),

comprising:

a drive prohibition processing unit (88b) that shifts the electric vehicle (10) to a suppression state in which the electric vehicle (10) is prohibited from being driven during travel of the electric vehicle (10); and

a resume drive processing unit (88c) that resumes driving of the electric vehicle (10) when the suppression state has been released during traveling of the electric vehicle (10).

2. The electric vehicle (10) of claim 1,

and a throttle valve (56R), the throttle valve (56R) being used for adjusting the output of the rotating electric machine (18),

when the throttle valve (56R) is closed after the shift to the suppression state during the travel of the electric vehicle (10), the resume drive processing unit (88c) determines that the suppression state has been released, and resumes the drive of the electric vehicle (10).

3. Electric vehicle (10) according to claim 1 or 2,

a stop switch (60b) for stopping the rotation of the rotating electrical machine (18),

the drive prohibition processing unit (88b) causes the electric vehicle (10) to transition to the suppression state when the stop switch (60b) is pressed during travel of the electric vehicle (10).

4. The electric vehicle (10) according to any one of claims 1 to 3,

further comprising a start switch (60a), the start switch (60a) being used for starting the rotation of the rotating motor (18),

when the start switch (60a) is pressed after the electric vehicle (10) shifts to the suppression state while traveling, the resume drive processing unit (88c) determines that the suppression state has been released and resumes driving of the electric vehicle (10).

5. The electric vehicle (10) according to any one of claims 1 to 4,

also provided with a side support (40),

the drive prohibition processing unit (88b) causes the electric vehicle (10) to transition to the suppression state when the side stay (40) is in the non-storage state during travel of the electric vehicle (10).

6. The electric vehicle (10) of claim 5,

when the side stay (40) is in the storage state after shifting to the suppression state during travel of the electric vehicle (10), the return drive processing unit (88c) determines that the suppression state has been released and returns the electric vehicle (10) to drive.