WO2023188744A1 - モータ出力制御方法 - Google Patents
モータ出力制御方法 Download PDFInfo
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- WO2023188744A1 WO2023188744A1 PCT/JP2023/002114 JP2023002114W WO2023188744A1 WO 2023188744 A1 WO2023188744 A1 WO 2023188744A1 JP 2023002114 W JP2023002114 W JP 2023002114W WO 2023188744 A1 WO2023188744 A1 WO 2023188744A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/12—Bikes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
Definitions
- the present invention relates to a motor output control method.
- a great appeal of saddle-riding vehicles such as motorcycles is that the rider can directly convey his or her intentions to the vehicle, and the vehicle can be manipulated as if it were part of the body.
- Conventional straddle-type vehicles driven by internal combustion engines have been operated by the occupants, including adjusting the opening and closing of the throttle using the accelerator grip, braking, and variable speeds using the clutch. has made it possible.
- BACKGROUND OF THE INVENTION Due to increased interest in environmental issues in recent years, electric two-wheeled vehicles driven by electric motors have been developed as saddle-ride vehicles. Among them, an electric two-wheeled vehicle is also disclosed that is provided with a clutch mechanism that disconnects between a motor and a gear train (for example, see International Publication No. 2014-102869).
- the present invention provides a motor output control method for an electric two-wheeled vehicle equipped with a stepped transmission that can be manually operated by a rider, by changing the output when the motor deviates from a range of good efficiency, and prompting the rider to perform a shift operation.
- One aspect of the present invention is a motor output control method for an electric two-wheeled vehicle equipped with a stepped transmission, including a required output calculation step of calculating a required output, and whether the required output is included in a specified region with good motor efficiency. and an output control step of controlling the motor to output a motor output changed from the requested output if the requested output is not included in the designated area.
- This is a motor output control method. Note that this specification includes all the contents of Japanese patent application/Japanese Patent Application No. 2022-054588 filed on March 29, 2022.
- FIG. 1 is a diagram showing the configuration of an electric two-wheeled vehicle.
- FIG. 2 is a diagram showing a configuration for realizing the motor output control method according to the present embodiment.
- FIG. 3 is a flowchart of output control in the electric two-wheeled vehicle.
- FIG. 4 is a schematic diagram of motor output characteristics showing designated areas with high motor efficiency.
- FIG. 5 is a flowchart of the motor output control method.
- FIG. 6 is a flowchart regarding motor output change processing.
- FIG. 7 is an explanatory diagram showing the relationship between changes in output characteristics due to shift changes and designated regions with high motor efficiency.
- FIG. 1 is a diagram showing the left side of a saddle-ride type vehicle (electric two-wheeled vehicle) 1.
- the electric two-wheeled vehicle 1 of this embodiment is an electric two-wheeled vehicle that includes a motor as a power unit instead of an internal combustion engine such as a gasoline engine.
- the electric two-wheeled vehicle 1 includes an accelerator grip, a clutch lever, a speed change pedal, etc. as an operating system 2 for a rider to control the electric two-wheeled vehicle 1.
- the electric two-wheeled vehicle 1 includes a front wheel 3 that is a steering wheel and a rear wheel 4 that is a driving wheel.
- the rear wheel 4 is supported at the rear of a swing arm (not shown) that is swingably supported by a vehicle body frame (not shown).
- the electric two-wheeled vehicle 1 includes an ECU (Electronic Control Unit) 5 that is a control device for performing various controls, a motor 10 that generates driving force, and a battery 15 that stores electric power.
- the electric two-wheeled vehicle 1 includes a clutch 25 and a stepped transmission 20 in order to transmit the driving force P of the motor 10 to the rear wheel 4.
- the motor 10 and the stepped transmission 20 are controlled by an ECU 5 that performs control according to instructions given to the operating system 2 by a passenger.
- the ECU5 has a processor such as CPU (Central Processi Nit), ROM (READ ONLY MEMORY), RAM (RANDOM ACCESS Memory), etc. (RANDOM ACCESS Memory), etc. It is a computer to do.
- Various control means are executed by the ECU 5, which is a computer, executing the program.
- all or part of the ECU 5 may be configured by hardware each including one or more electronic circuit components.
- the motor 10 is a three-phase electric motor or the like.
- the battery 15 may be a lithium ion battery or the like.
- the motor 10 and battery 15 are fixed to the vehicle body frame.
- the stepped transmission 20 is a power transmission mechanism that combines a plurality of gears to change the rotational speed.
- the clutch 25 is a device that is attached between the motor 10 and the stepped transmission 20 and transmits or cuts off the driving force P to the stepped transmission 20.
- the clutch 25 is operated by an occupant operating a clutch lever (not shown).
- FIG. 2 is a block diagram showing the configuration of the ECU 5 that implements the motor output control method according to the present embodiment.
- the ECU 5 is connected to an accelerator operation amount detection means 50 that detects an accelerator operation amount.
- the ECU 5 is connected to a motor rotation speed detection means 60 that detects the motor rotation speed of the motor 10 and a shift position detection means 60 that detects the shift position of the stepped transmission 20.
- the ECU 5 includes a detection information acquisition unit 23 that acquires information detected by various detection units.
- the ECU 5 also includes a calculation means 26 that performs calculations for output control based on the acquired information.
- the ECU 5 includes a determining means 27 that determines whether or not the output is in a designated region that is an output region with good motor efficiency, as will be described later. The operation of the determining means 27 will be described later.
- the ECU 5 includes an output control means 33 that performs output control. Each operation will be described later.
- the ECU 5 also includes a storage means 31 that stores programs and data for implementing various means, as well as a designated area, a shift-up threshold value, and a shift-down threshold value, which will be described later.
- the storage means 31 is realized by a storage device such as an SSD (Solid State Drive). Further, the detection information acquisition means 23 is realized by an interface circuit or the like. The calculation means 26, the determination means 27, and the output control means 33 are realized by the ECU 5 executing a program stored in the storage means 35.
- SSD Solid State Drive
- FIG. 3 is a flowchart of general output control in the electric two-wheeled vehicle 1.
- the accelerator operation amount detection means 50 detects the accelerator operation amount by the occupant (step TA1). Specifically, the throttle opening in an internal combustion engine is detected from the rotation angle of the accelerator grip.
- the detection information acquisition means 23 acquires the accelerator operation amount from the accelerator operation amount detection means 50.
- the calculation means 26 converts the accelerator operation amount into a required output (step TA2).
- the calculating means calculates the actual motor output from the requested output (step TA3).
- the motor is driven with a current value corresponding to the motor output (step TA4). As a result, the motor 10 outputs an output based on the requested output (step TA5).
- FIG. 4 is a schematic diagram of motor output characteristics showing a designated region 82 with high motor efficiency.
- the horizontal axis is the motor rotation speed, and the vertical axis is the motor output.
- As the motor output characteristic 85 at no-load an example is given in which the amount of torque is constant regardless of the motor rotation speed from 0 rpm to about 6500 rpm.
- a designated area 82 which is an area in which the motor operates with high efficiency, is indicated by diagonal lines. If the output of the electric two-wheeled vehicle 1 is within this specified range 82, the electric two-wheeled vehicle 1 can run with high efficiency, that is, with good "fuel efficiency.”
- FIG. 4 also shows a downshift threshold 90 and an upshift threshold 100. A description of the downshift threshold 90 and the upshift threshold 100 will be given later.
- FIG. 5 is a flowchart of the motor output control method according to the present embodiment.
- the calculation means 26 of the ECU 5 estimates the motor rotation speed and torque from the accelerator operation amount acquired from the accelerator operation amount detection means 50 and the shift of the stepped transmission 20 detected by the shift position detection means 60, and estimates the motor rotation speed and torque, and estimates the motor rotation speed and torque based on the accelerator operation amount obtained from the accelerator operation amount detection means 50 and the shift of the stepped transmission 20 detected by the shift position detection means 60.
- the required output is calculated (step SA1: required output calculation step).
- the determining means 27 of the ECU 5 determines whether the requested output is included in the designated region 82 with good motor efficiency (step SA2: determining step).
- step SA2 If the requested output is not included in the designated area 82 (step SA2: NO), the ECU 5 does not cause the motor 10 to output the same value as the requested output as the motor output, but changes the motor output for change control. A process of changing the requested output is performed (step SA3: output control step). According to the changed motor output, the ECU 5 controls the motor 10 to output the motor (step SA4). If the determining means 27 determines that the requested output is included in the designated region 82 with good motor efficiency, the ECU 5 controls the motor 10 to output the same value as the requested output as the motor output, and performs motor output ( Step SA2: YES).
- the motor output control method includes a required output calculation step (SA1) for calculating a required output, and a determination for determining whether or not the required output is included in the designated region 82 with good motor efficiency. step (SA2), and an output control step (SA3) of controlling the motor 10 to output a motor output changed from the requested output when the requested output is not included in the designated area 82. do.
- FIG. 6 is a flowchart regarding motor output change processing.
- the determining means 27 determines whether the requested output is included in the shift-up recommended region (step SB1).
- the shift-up recommended region is an output region in which it is appropriate to shift up in the stepped transmission 20 for efficient operation, and in FIG. , and is an area that is not included in the designated area 82. If the requested output is included in the shift-up recommended region (step SB1: YES), the output control means 29 performs control to reduce the motor output every time a predetermined time elapses (step SB2). By performing such control, the occupant can recognize the timing of upshifting.
- the determining means 27 determines whether the requested output is included in the downshift recommended region (step SB3).
- the recommended downshift range is an output range in which it is appropriate to downshift in the stepped transmission 20 for efficient operation, and in FIG. , and is an area that is not included in the designated area 82.
- the output control means 29 performs control to increase the motor output within a predetermined range (step SB4). By performing such control, the occupant can recognize the timing of downshifting. If the requested output is not included in the shift-up recommended area (step SB1: NO), the process moves to step SB3, and if the requested output is not included in the shift-down recommended area (step SB3: NO), motor output change processing is performed. Get out of.
- FIG. 7 is an explanatory diagram showing the relationship between changes in output characteristics due to shift changes and designated regions with high motor efficiency.
- the required output is in state A of shift position 2
- the motor is outside the specified range 82 with good motor efficiency, and it is desirable to shift up.
- the state A is included in a region where the motor rotation speed is higher than the line of the shift-up threshold value 100 and which is not included in the designated region 82.
- the output control means 29 will control the motor output to reduce the motor output, thereby making it possible for the occupant to realize that the vehicle is being operated inefficiently, thereby causing the driver to shift up. can be encouraged.
- state B is included in a region that is on the motor rotation speed side lower than the line of the downshift threshold 90 and is not included in the designated region 82.
- the output control means 29 controls to increase the motor output, thereby making the occupant aware of inefficient driving, and downshifting. can be encouraged.
- a motor output control method for an electric two-wheeled vehicle equipped with a stepped variable transmission including a required output calculation step of calculating a required output, and determining whether the required output is included in a specified region with good motor efficiency. and an output control step of controlling the motor to output a motor output changed from the requested output if the requested output is not included in the designated area.
- Output control method when the required output is outside the range of good motor efficiency, the occupant can be made aware that the output is not appropriate, and the occupant can be prompted to perform a shift operation. Therefore, an excellent effect is achieved in that the motor can be operated within a region with high motor efficiency.
- (Configuration 2) A shift-up determination step for determining whether or not the requested output is included in a shift-up recommended region in which an up-shift is to be encouraged; If it is determined that the motor output is within the recommended range, the output control step includes an output reduction step of reducing the motor output every time a predetermined time elapses. Control method. According to this configuration, when it is determined that a shift up is required for high motor efficiency, the motor output is gradually suppressed, so that the occupant does not feel excessively uncomfortable. This has the excellent effect of promoting upshifts without having to memorize them, and allowing the occupants to drive in an efficient range.
- the motor output includes a downshift determination step of determining whether or not the motor output is included in a downshift recommended region in which downshifting should be encouraged, and in the downshift determination step, the requested output is
- the motor output control according to configuration 1 or configuration 2, wherein when it is determined that the motor output is included in the recommended region, the output control step includes a motor output increasing step of increasing the motor output within a predetermined range.
- the step units of the operations shown in Figures 3, 5, and 6 are divided according to the main processing contents in order to facilitate understanding of the control method of the electric two-wheeled vehicle.
- the present invention is not limited by the method or name.
- the process may be divided into more steps.
- the process may be divided so that one step unit includes more processes.
- the order of the steps may be changed as appropriate within a range that does not interfere with the spirit of the present invention.
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Abstract
Description
近年の環境問題への関心の高まりにより、鞍乗り型車両についても電動モータで駆動される電動二輪車が開発されてきている。その中で、モータとギア列との間を遮断するクラッチ機構が設けられている電動二輪車も開示されている(例えば、国際公開2014-102869号公報参照)。
本発明は、乗員によるマニュアル操作が可能な有段変速機を備える電動二輪車において、モータ効率の良い領域を逸脱した場合に出力を変化させ、乗員にシフト操作を促すモータ出力制御方法を提供する。
なお、この明細書には、2022年3月29日に出願された日本国特許出願・特願2022-054588号の全ての内容が含まれるものとする。
以下、本発明の実施形態について図面を参照して説明する。なお、以下の説明における前後左右等の向きは、特に記載が無ければ以下に説明する車両における向きと同一とする。また、以下の説明に用いる図中適所には、車両前方を示す矢印FR、車両上方を示す矢印UPが示されている。なお本明細書では、電動モータのことをモータと呼ぶ。
次に判定手段27は、要求出力がシフトダウン推奨領域に含まれているか否かを判定する(ステップSB3)。ここでシフトダウン推奨領域とは、効率の良い運転のために、有段変速機20においてシフトダウンすることが適当な出力領域であり、図4ではシフトダウン閾値90のラインから低いモータ回転数側で、且つ、指定領域82に含まれない領域である。要求出力がシフトダウン推奨領域に含まれている場合(ステップSB3:YES)、出力制御手段29は、モータ出力を所定の範囲内で増大させる制御をおこなう(ステップSB4)。このような制御をすることにより、乗員はシフトダウンのタイミングを認識することができる。
要求出力がシフトアップ推奨領域に含まれていない場合(ステップSB1:NO)、ステップSB3に移行し、要求出力がシフトダウン推奨領域に含まれていない場合(ステップSB3:NO)、モータ出力変更処理から抜ける。
また、要求出力がシフトポジション5速の状態Bである場合はモータ効率の良い指定領域82からは外れており、シフトダウンが望ましい。言い換えると、図7ではシフトダウン閾値90のラインより低いモータ回転数側で、且つ、指定領域82に含まれない領域に状態Bは含まれる。この場合、本実施形態のモータ出力制御方法に従えば、出力制御手段29がモータ出力を上げる制御をすることで、非効率な運転をおこなっていることを乗員に気がつかせることができ、シフトダウンを促すことができる。
上記実施形態は、以下の構成をサポートする。
このような構成によれば、要求出力がモータ効率の良い領域外である場合、出力が適正でないことを乗員に認識させることができ、乗員にシフト操作を促すことができる。そのためモータ効率の高い領域内での運転が可能になるという優れた効果を奏する。
このような構成によれば、モータ効率の高い運転をするためにはシフトアップが必要な状態であると判定された場合には、徐々にモータ出力を抑えていくので、乗員が過度な違和感を覚えることなく、シフトアップを促進でき、乗員に効率の良い領域で運転させることが出来るという優れた効果を奏する。
このような構成によれば、モータ効率の高い運転をするためにはシフトダウンが必要な状態であると判定された場合には、要求出力に対してモータ出力が追いついてこないことを乗員に認識させやすいため、乗員にシフトダウンを促すことができ、乗員に効率の良い領域で運転させることが出来るという優れた効果を奏する。
10 モータ
20 有段変速機
82 指定領域
Claims (3)
- 有段変速機(20)を備える電動二輪車(1)のモータ出力制御方法であって、
要求出力を算出する要求出力算出ステップ(SA1)と、
前記要求出力が、モータ効率の良い指定領域(82)に含まれるか否かを判定する判定ステップ(SA2)と、
前記要求出力が前記指定領域(82)に含まれない場合、前記要求出力から変更したモータ出力を出力するようにモータ(10)を制御する出力制御ステップ(SA3)と、
を有することを特徴とするモータ出力制御方法。 - 前記要求出力が、シフトアップを促すべきシフトアップ推奨領域に含まれているか否かを判定するシフトアップ判定ステップ(SB1)を有し、
前記シフトアップ判定ステップ(SB1)で、前記要求出力が、前記シフトアップ推奨領域に含まれていると判定した場合、
前記出力制御ステップは、所定時間経過するごとに前記モータ出力を低減させていく出力低減ステップ(SB2)を有することを特徴とする請求項1に記載のモータ出力制御方法。 - 前記モータ出力が、シフトダウンを促すべきシフトダウン推奨領域に含まれるか否かを判定するシフトダウン判定ステップ(SB3)を有し、
前記シフトダウン判定ステップ(SB3)で、前記要求出力が、前記シフトダウン推奨領域に含まれていると判定した場合、
前記出力制御ステップ(SA3)は、前記モータ出力を所定範囲内で増大させるモータ出力増大ステップ(SB4)を有することを特徴とする請求項1又は請求項2に記載のモータ出力制御方法。
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JPH07322415A (ja) * | 1994-05-20 | 1995-12-08 | Fuji Heavy Ind Ltd | 電気自動車の変速タイミング警報装置 |
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JP2018023223A (ja) * | 2016-08-03 | 2018-02-08 | ヤマハ発動機株式会社 | 電動車両 |
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WO2014102869A1 (ja) | 2012-12-27 | 2014-07-03 | 川崎重工業株式会社 | 電動車両 |
JP2022054588A (ja) | 2020-09-28 | 2022-04-07 | 国立大学法人広島大学 | 双方向無線通信トランシーバ |
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JPH07322415A (ja) * | 1994-05-20 | 1995-12-08 | Fuji Heavy Ind Ltd | 電気自動車の変速タイミング警報装置 |
WO2011135910A1 (ja) * | 2010-04-26 | 2011-11-03 | 本田技研工業株式会社 | 変速機制御装置及び変速機制御方法 |
JP2018023223A (ja) * | 2016-08-03 | 2018-02-08 | ヤマハ発動機株式会社 | 電動車両 |
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