HYBRID VEHICLE AND TRAVEL MODE SETTING METHOD OF HYBRID VEHICLE

• US 20120065828A1
• Filed: 05/26/2009
• Published: 03/15/2012
• Est. Priority Date: 05/26/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kato, Norihiko
• Granted Patent: US 10,315,641 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

In the case that there is the charge record of the charger at the system startup time, the motor travel priority mode is set as the travel mode when the accumulated charge ration SOC is more than or equal to the threshold value Sev, and the hybrid travel priority mode is set as the travel mode when the accumulated charge ratio SOC is less than the threshold value Sev. In the case that there is no charge record of the charger, the travel mode is set in the same way as the case that there is the charge record when the hybrid travel shift flag Fhv is equal to value ‘0’, and the hybrid travel priority mode is set as the travel mode when the hybrid travel shift flag Fhv is equal to value ‘1’.

Claims

1. A hybrid vehicle, having an internal combustion engine capable of outputting power for driving the hybrid vehicle, a motor constructed to input and output power for driving the hybrid vehicle, a secondary battery designed to transmit electric power to and from the motor, and a charger connected to an external power supply in a system shutdown state of the hybrid vehicle to charge the secondary battery with electric power from the external power supply, the hybrid vehicle being capable of motor travel where the hybrid vehicle is driven only with input and output power to and from the motor and hybrid travel where the hybrid vehicle is driven with output power from the internal combustion engine and with the input and output power to and from the motor, the hybrid vehicle comprising:

an accumulated charge ratio calculation module configured to calculate an accumulated charge ratio that is a ratio of an accumulated charge amount in the secondary battery to a whole capacity of the secondary battery;

a travel mode setting module configured to set a motor travel priority mode where the motor travel is prioritized for driving the hybrid vehicle as a travel mode when the calculated accumulated charge ratio is more than or equal to a first preset ratio at system startup of the hybrid vehicle in which the secondary battery is charged by the charger after system shutdown of the hybrid vehicle,

set a hybrid travel priority mode where the hybrid travel is prioritized for driving the hybrid vehicle as the travel mode when the calculated accumulated charge ratio is less than the first preset ratio at the system startup of the hybrid vehicle in which the secondary battery is charged by the charger after the system shutdown of the hybrid vehicle,

set the hybrid travel priority mode as the travel mode when the accumulated charge ratio becomes less than a second preset ratio that is less than the first preset ratio while the hybrid vehicle is driven in the motor travel priority mode,

set the motor travel priority mode as the travel mode at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown of the hybrid vehicle in which the motor travel priority mode is set as the travel mode, and

set the hybrid travel priority mode as the travel mode regardless of the calculated accumulated charge ratio at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown of the hybrid vehicle in which the hybrid travel priority mode is set as the travel mode according to the calculated accumulated charge ratio becoming less than the second preset ratio; and

a control module configured to control the internal combustion engine and the motor so that the hybrid vehicle is driven in the set travel mode.

2. The hybrid vehicle in accordance with claim 1, wherein the travel mode setting module is configured to set the hybrid travel priority mode as the travel mode when the calculated accumulated charge ratio is less than a third preset ratio at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown of the hybrid vehicle in which the motor travel priority mode is set as the travel mode.

3. The hybrid vehicle in accordance with claim 2, wherein the third preset ratio is either the first preset ratio or the second preset ratio.

4. The hybrid vehicle in accordance with claims claim 1, the hybrid vehicle further comprising:

a hybrid setting cancellation instruction module configured to give instructions for a hybrid setting that is a setting of the hybrid travel priority mode and for a cancellation of the hybrid setting,

wherein the travel mode setting module is configured to set the hybrid travel priority mode as the travel mode when the instruction for the hybrid setting is given by the hybrid setting cancellation instruction module while the hybrid vehicle is driven in the motor travel priority mode, and set the motor travel priority mode as the travel mode when the instruction for the cancellation of the hybrid setting is given by the hybrid setting cancellation instruction module while the hybrid vehicle is driven in the hybrid travel priority mode according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

5. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the motor travel priority mode as the travel mode when the calculated accumulated charge ratio is more than or equal to the first preset ratio, while setting the hybrid travel priority mode as the travel mode when the calculated accumulated charge ratio is less than the first preset ratio, at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

6. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the hybrid travel priority mode as the travel mode at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

7. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the motor travel priority mode as the travel mode when the calculated accumulated charge ratio is more than or equal to the first preset ratio, while setting the hybrid travel priority mode as the travel mode when the calculated accumulated charge ratio is less than the first preset ratio, at the system startup of the hybrid vehicle in which the secondary battery is charged by the charger after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

8. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the hybrid travel priority mode as the travel mode at the system startup of the hybrid vehicle in which the secondary battery is charged by the charger after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

9. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the motor travel priority mode as the travel mode when the calculated accumulated charge ratio is more than or equal to the first preset ratio, while setting the hybrid travel priority mode as the travel mode when the calculated accumulated charge ratio is less than the first preset ratio, at the system startup of the hybrid vehicle after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

10. The hybrid vehicle in accordance with claim 4, wherein the travel mode setting module is configured to set the hybrid travel priority mode as the travel mode at the system startup of the hybrid vehicle after the system shutdown, without the instruction for the cancellation of the hybrid setting by the hybrid setting cancellation instruction module, of the hybrid vehicle in which the hybrid travel priority mode is set according to the instruction for the hybrid setting by the hybrid setting cancellation instruction module.

11. A travel mode setting method of a hybrid vehicle having an internal combustion engine capable of outputting power for driving the hybrid vehicle, a motor constructed to input and output power for driving the hybrid vehicle, a secondary battery designed to transmit electric power to and from the motor, a charger connected to an external power supply in a system shutdown state of the hybrid vehicle to charge the secondary battery with electric power from the external power supply, and a travel control module configured to control the internal combustion engine and the motor so that the hybrid vehicle is driven in one set travel mode between a motor travel priority mode, where a motor travel that the hybrid vehicle is driven only with input and output power to and from the motor is prioritized for driving the hybrid vehicle, and a hybrid travel priority mode, where a hybrid travel that the hybrid vehicle is driven with output power from the internal combustion engine and with the input and output power to and from the motor is prioritized for driving the hybrid vehicle, the travel mode setting method comprising:

setting the motor travel priority mode as the travel mode when an accumulated charge ratio is more than or equal to a first preset ratio at system startup of the hybrid vehicle in which the secondary battery is charged by the charger after system shutdown of the hybrid vehicle, the accumulated charge ratio being a ratio of an accumulated charge amount in the secondary battery to a whole capacity of the secondary battery,

setting the hybrid travel priority mode as the travel mode when the accumulated charge ratio is less than the first preset ratio at the system startup of the hybrid vehicle in which the secondary battery is charged by the charger after the system shutdown of the hybrid vehicle,

setting the hybrid travel priority mode as the travel mode when the accumulated charge ratio becomes less than a second preset ratio that is less than the first preset ratio while the hybrid vehicle is driven in the motor travel priority mode,

setting the motor travel priority mode as the travel mode at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown of the hybrid vehicle in which the motor travel priority mode is set as the travel mode, and

setting the hybrid travel priority mode as the travel mode regardless of the accumulated charge ratio at the system startup of the hybrid vehicle in which the secondary battery is not charged by the charger after the system shutdown of the hybrid vehicle in which the hybrid travel priority mode is set as the travel mode according to the accumulated charge ratio becoming less than the second preset ratio.