Control method for hybrid vehicle and control device for hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2023347866-A1
Application number	US-201917629947-A
Country	US
Kind code	A1
Filing date	Jul 26, 2019
Priority date	Jul 26, 2019
Publication date	Nov 2, 2023
Grant date	—

Abstract

A control method for a hybrid vehicle is provided. The hybrid vehicle includes: a power generator that charges a battery using power of an engine; an electric motor that drives a driving wheel by electric power of the battery; a particulate filter that collects particulate matters contained in exhaust gas from the engine. In the control method, electric power is supplied from the battery to the power generator to perform a motoring operation of rotating the engine by the power generator to supply air to the particulate filter when particulate matters of a first predetermined amount or more are accumulated in the particulate filter. And motoring operation is prohibited even if the particulate filter is accumulated with particulate matters of the first predetermined amount or more when a predetermined first condition that a driver does not intend a motoring operation is satisfied.

First claim

1 .- 9 . (canceled)

10 . A control method for a hybrid vehicle having a power generator that charges a battery using power of an engine, an electric motor that drives a driving wheel by electric power of the battery, and a particulate filter that collects particulate matters contained in exhaust gas from the engine, the control method comprising:
supplying electric power from the battery to the power generator to perform a motoring operation of rotating the engine by the power generator to supply air to the particulate filter when particulate matters of a first predetermined amount or more are accumulated in the particulate filter; and performing motoring operation with a throttle opening closed narrower than that in another motoring operation performed in a state where it is not at the time of a brake negative pressure request, if there is a brake negative pressure request when motoring operation is performed with particulate matters of the first predetermined amount or more accumulated.

11 . The control method for the hybrid vehicle according to claim 10 , wherein:
when the particulate filter is accumulated with particulate matters of a second predetermined amount, which is larger than the first predetermined amount, or more, a motoring operation is performed even if the EV priority traveling mode is set.

12 . The control method for the hybrid vehicle according to claim 10 , wherein:
even if particulate matters of the first predetermined amount or more are accumulated and the EV priority traveling mode is not set, when it is necessary to continue combustion of the engine because the engine cannot be reignited once stopped, or when a motoring operation interferes with a component constituting the vehicle, motoring operation is prohibited.

13 . The control method for the hybrid vehicle according to claim 11 , wherein:
even if particulate matters of the second predetermined amount or more are accumulated, when it is necessary to continue combustion of the engine because the engine cannot be reignited once stopped, or when a motoring operation interferes with a component constituting the vehicle, motoring operation is prohibited.

14 . The control method for the hybrid vehicle according to claim 11 , wherein:
when a motoring operation is performed with the particulate filter accumulated with particulate matters in an amount equal to or larger than the first predetermined amount and less than the second predetermined amount, if a predetermined second condition requesting noise suppression is satisfied, the motoring operation is performed at a rotation speed lower than that in another motoring operation performed in a state where the predetermined second condition is not satisfied.

15 . The control method for the hybrid vehicle according to claim 14 , wherein:
the predetermined second condition is that a vehicle speed is equal to or less than a predetermined speed.

16 . The control method for the hybrid vehicle according to claim 10 , wherein:
when a motoring operation is performed with particulate matters of the first predetermined amount or more accumulated, if SOC of the battery is equal to or larger than an allowable charge upper limit value, the motoring operation is performed with a throttle opening closed narrower than that in another motoring operation performed in a state where SOC of the battery is not equal to or larger than an allowable charge upper limit value.

17 . A control device for a hybrid vehicle, comprising:
a power generator that charges a battery using power of an engine; an electric motor that drives a driving wheel by electric power of the battery; a particulate filter that collects particulate matters contained in exhaust gas from the engine; and a controller that supplies air to the particulate filter by supplying electric power from the battery to the power generator to perform a motoring operation of rotating the engine by the power generator when particulate matters of a first predetermined amount or more are accumulated in the particulate filter, wherein when a motoring operation is performed with particulate matters of the first predetermined amount or more accumulated, if there is a brake negative pressure request, the controller performs the motoring operation with a throttle opening closed narrower than that in another motoring operation performed in a state where it is not at the time of the brake negative pressure request.

Assignees

• Nissan Motor

Inventors

• Hoshi Kiyoshi
• Gotou Kenichi
• Kobayashi Azusa

Classifications

• B60W20/13 Primary

  in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion · CPC title

• B60W20/20

  Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration · CPC title

• B60W20/16

  for reducing engine exhaust emissions · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title