# US 11,897,338 B2 · Electric vehicle

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- Number: US 11,897,338 B2
- Document ID: US11897338B2
- Status: Granted
- Kind: B2
- Application number: 17/379,192
- Filed: 2021-07-19
- Published: 2022-02-10
- Granted: 2024-02-13
- Earliest claimed: 2020-08-07
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Yoichiro Isami; Yoshio Itou; Hiroyuki Amano; Tatsuya Imamura; Akiko Nishimine; Hiroaki Ebuchi; Hiroaki Kodera
- Web page: https://patentgrep.com/patent/US11897338B2

## CPC

- B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L 15/2054: {by controlling transmissions or clutches}
- B60K 26/02: of initiating means or elements
- B60L 15/02: characterised by the form of the current used in the control circuit
- B60W 30/1884: {Avoiding stall or overspeed of the engine}
- B60W 50/14: Means for informing the driver, warning the driver or prompting a driver intervention
- H02P 23/20: Controlling the acceleration or deceleration
- B60L 2240/423: Torque
- B60L 2240/463: Torque
- B60L 2240/486: Operating parameters
- B60L 2240/507: Operating parameters
- B60L 2240/642: Slope of road
- B60L 2250/16: by display
- B60L 2250/28: Accelerator pedal thresholds
- B60L 2260/30: Engine braking emulation
- B60L 2260/44: by parameter estimation
- B60W 2552/15: Road slope, i.e. the inclination of a road segment in the longitudinal direction
- B60W 2554/80: Spatial relation or speed relative to objects
- B60W 2555/00: Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
- H02P 27/08: with pulse width modulation
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/72: Electric energy management in electromobility
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The controller of the electric vehicle is configured to control the torque of the electric motor using the MT vehicle model based on the operation amount of the accelerator pedal, the operation amount of the pseudo-clutch pedal, and the shift position of the pseudo-shifter. Further, the controller is configured to execute the stall production process for changing the engine output torque used for calculation of the driving wheel torque to zero when the calculated virtual engine speed using the MT vehicle model becomes lower than the prescribed stall engine speed.

## Claims

### Claim 1

An electric vehicle using an electric motor as a power source for traveling, the electric vehicle comprising:
an accelerator pedal;
a pseudo-clutch pedal;
a pseudo-shifter; and
a controller configured to control motor torque output by the electric motor,
wherein, the controller comprises:
a memory, and
a processor,
wherein the memory is configured to store an MT vehicle model simulating a torque characteristic of a driving wheel torque in an MT vehicle having an internal combustion engine which is controlled by operation of a gas pedal, and a manual transmission in which a gear stage is switched by operation of a clutch pedal and a shifter,
wherein, the processor is configured to execute:
a process of receiving an operation amount of the accelerator pedal as an input of an operation amount of the gas pedal with respect to the MT vehicle model,
a process of receiving an operation amount of the pseudo-clutch pedal as an input of an operation amount of the clutch pedal with respect to the MT vehicle model,
a process of receiving a shift position of the pseudo-shifter as an input of a shift position of the shifter with respect to the MT vehicle model,
a process of calculating a driving wheel torque determined by the operation amount of the accelerator pedal, the operation amount of the pseudo-clutch pedal, and the shift position of the pseudo-shifter, using the MT vehicle model, and
a process of calculating a motor torque for providing the driving wheel torque to driving wheels of the electric vehicle,
wherein, in the process of calculating the driving wheel torque, the processor is configured to execute:
a process of calculating an engine speed of the internal combustion engine using the MT vehicle model,
a process of calculating an engine output torque of the internal combustion engine determined by the engine speed and the operation amount of the acceleration pedal, using the MT vehicle model,
a process of calculating the driving wheel torque determined by the operation amount of the pseudo-clutch pedal, the shift position of the pseudo-shifter, and the engine output torque, using the MT vehicle model, and
a stall production process of changing the engine output torque used in the calculation of the driving wheel torque to zero, when the engine speed of the internal combustion engine becomes lower than a predetermined stall engine speed,
wherein the electric vehicle further comprises an external sensor for detecting a situation in which the electric vehicle is placed, and
wherein the processor is configured to execute:
a process of determining whether the electric vehicle is in a specific situation in which the stall production process should be avoided based on the situation detected by the external sensor, and
a process of avoiding execution of the stall production process when the engine speed of the internal combustion engine becomes lower than the predetermined stall engine speed and the electric vehicle is in the specific situation in the process of determining.

### Claim 2 (depends on 1)

The electric vehicle according to claim 1,
wherein, in the stall production process, the processor is configured to execute a process of notifying a driver of execution of the stall production process.

### Claim 3 (depends on 1)

The electric vehicle according to claim 1,
wherein the external sensor is configured to detect, as the situation, at least one of an inclination angle of a traveling road, a distance to a trailing vehicle, and a degree of congestion of a road.

### Claim 4 (depends on 1)

The electric vehicle according to claim 1,
wherein, the processor is configured to execute a process of notifying a driver that execution of the stall production process is avoided, when the electric vehicle is in the specific situation in the process of determining.

### Claim 5

The electric vehicle according to The electric vehicle according to wherein the process of notifying includes displaying in a HMI unit installed in a vicinity of an instrument panel or outputting as voice from a speaker.