Hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2016137185-A1
Application number	US-201314901107-A
Country	US
Kind code	A1
Filing date	Jul 11, 2013
Priority date	Jul 11, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

This hybrid vehicle ( 10 ) has an HV mode and an EV mode, creates a predetermined traveling plan in a manner so as to switch between HV mode and EV mode on the basis of map information, and performs mode switching control on. the basis of the traveling plan. The hybrid vehicle ( 10 ) limits the execution of mode switching control that is on the basis of the traveling plan in the case of a predetermined state such that the power that can be output by a battery ( 28 ) that is the storage battery connected to a second MG ( 24 ) that is a rotary electric machine driven during execution of the EV mode is limited.

First claim

1 . A hybrid electric vehicle that has an HV mode and an EV mode, that produces a predetermined travel plan to switch between the HV mode and the EV mode based on map information, and that executes a switching control of modes based on the travel plan, wherein
execution of the switching control of the modes based on the travel plan is limited when in a predetermined state in which an electric power that can be output from an electricity storage unit connected to a rotary electric machine driven during execution of the EV mode is limited, at least one control of control to enlarge an amount of regenerative power generation that can be charged in the electricity storage unit by controlling regenerative power generation of the rotary electric machine by predicting or setting stopping and deceleration by a driver based on the map information, wherein a deceleration start position for increasing an amount of regenerative power generation and a deceleration setting point which is passed after the deceleration start position are set based on the map information and a detected vehicle speed, with acceleration OFF, a first regenerative torque is generated in the rotary electric machine from the deceleration start position to the deceleration setting point to decelerate the vehicle, and a second regenerative torque greater than the first regenerative torque is generated in the rotary electric machine after the deceleration setting point to increase a degree of deceleration, and control to change a control target value of the charge remaining amount of the electricity storage unit based on a downhill road position of the map information, is executed, and whether or not the switching control based on the travel plan is to be executed is determined by determining whether or not a preset state of the electricity storage unit corresponding to the predetermined state is greater than or equal to a first threshold, and whether or not the one control of the control to enlarge the amount of regenerative power generation that can be charged in the electricity storage unit based on the map information and the control to change the control target value of the charge remaining amount of the electricity storage unit based on the map information is to be executed is determined by determining whether or not the preset state of the electricity storage unit corresponding to the predetermined state is greater than or equal to a second threshold, wherein the first threshold and the second threshold differ from each other.

2 . The hybrid electric vehicle according to claim 1 , wherein
the predetermined state in which the electric power that can be output from the electricity storage unit is limited is one state of a low-charge state in which a charge remaining amount of the electricity storage unit is less than a predetermined lower limit remaining amount, a low-temperature state in which a temperature of the electricity storage unit is less than a predetermined lower limit temperature, and a low-power state in which the electric power that can be output from the electricity storage unit is less than a predetermined lower limit electric power.

3 . A hybrid electric vehicle that has an HV mode and an EV mode, that produces a predetermined travel plan to switch between the HV mode and the EV mode based on map information, and that executes a switching control of modes based on the travel plan, wherein
execution of the switching control of the modes based on the travel plan is limited when in a predetermined state in which an electric power that can be output from an electricity storage unit connected to a rotary electric machine driven during execution of the EV mode is limited, at least one control of control to enlarge an amount of regenerative power generation that can be charged in the electricity storage unit by controlling regenerative power generation of the rotary electric machine by predicting or setting stopping and deceleration by a driver based on the map information, and control to change a control target value of the charge remaining amount of the electricity storage unit based on the map information, is executed, whether or not the switching control based on the travel plan is to be executed is determined by determining whether or not a preset state of the electricity storage unit is greater than or equal to a first threshold, and whether or not the one control of the control to enlarge the amount of regenerative power generation that can be charged in the electricity storage unit based on the map information and the control to change the control target value of the charge remaining amount of the electricity storage unit based on the map information is to be executed is determined by determining whether or not the preset state of the electricity storage unit is greater than or equal to a second threshold, wherein the first threshold and the second threshold differ from each other, the predetermined state in which the electric power that can be output from the electricity storage unit is limited is at least one state of a low-charge state in which a charge remaining amount of the electricity storage unit is less than a predetermined lower limit remaining amount, a low-temperature state in which a temperature of the electricity storage unit is less than a predetermined lower limit temperature, and a low-power state in which the electric power that can be output from the electricity storage unit is less than a predetermined lower limit electric power, the execution of the switching control based on the travel plan is permitted when the charge remaining amount, the temperature, or the electric power that can be output, which is the preset state of the electricity storage unit, is greater than or equal to the first threshold, and prohibited when the charge remaining amount, the temperature, or the electric power that can be output is less than the first threshold, and the execution of the one control of the control to enlarge the amount of regenerative power generation that can be charged in the electricity storage unit based on the map information and the control to change the control target value of the charge remaining amount of the electricity storage unit based on the map information is permitted when the charge remaining amount, the temperature, or the electric power that can be output is greater than or equal to the second threshold, and prohibited when the charge remaining amount, the temperature, or the electric power that can be output is less than the second threshold, and the first threshold is greater than the second threshold.

4 . (canceled)

5 . The hybrid electric vehicle according to of claim 1 , wherein
when execution of the one control of the control to enlarge the amount of regenerative power generation that can be charged in the electricity storage unit based on the map information and the control to change the control target value of the charge remaining amount of the electricity storage unit based on the map information, and execution of the switching control based on the travel plan are to be permitted based on the preset state of the electricity storage unit corresponding to the predetermined state, the execution of the switching control based on the travel plan is permitted and the execution of the one control is prohibited.

6 . The hybrid electric vehicle according to claim 1 , wherein
the travel plan is produced with an emphasis on an increase in a vehicle efficiency in a future travel route.

7 . The hybrid electric vehicle according to claim 1 , wherein
an external charging from an external power supply to the electricity storage unit is enabled in a travel stop state.

Assignees

• Toyota Motor Co Ltd

Inventors

• Morisaki Keisuke

Classifications

• B60W10/26

  for electrical energy, e.g. batteries or capacitors · CPC title

• B60W2556/50

  of positioning data, e.g. GPS [Global Positioning System] data · CPC title

• B60L50/16

  with provision for separate direct mechanical propulsion · CPC title

• B60L58/25

  by controlling the electric load · CPC title

• B60L58/13

  Maintaining the SoC within a determined range · CPC title