Control method for hybrid vehicle and control device for hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2022289170-A1
Application number	US-201917629868-A
Country	US
Kind code	A1
Filing date	Jul 26, 2019
Priority date	Jul 26, 2019
Publication date	Sep 15, 2022
Grant date	—

Abstract

A control method for a hybrid vehicle is provided. The hybrid vehicle includes: a generator configured to charge a battery by using power of an engine; an electric motor configured to drive a driving wheel by electric power of the battery; and a particulate filter configured to collect particulate matter contained in exhaust gas from the engine. In the control method, the engine is driven to raise a temperature of the particulate filter when a first temperature rise condition is satisfied in which a first predetermined amount or more of the particulate matter is accumulated in the particulate filter and the temperature of the particulate filter is equal to or lower than a predetermined temperature. Drive of the engine is prohibited, when a predetermined first condition that a driver does not intend to drive the engine is satisfied.

First claim

1 . A control method for a hybrid vehicle,
the hybrid vehicle including: a generator configured to charge a battery by using power of an engine; an electric motor configured to drive a driving wheel by electric power of the battery; and a particulate filter configured to collect particulate matter contained in exhaust gas from the engine, the control method comprising: driving the engine to raise a temperature of the particulate filter when a first temperature rise condition is satisfied in which a first predetermined amount or more of the particulate matter is accumulated in the particulate filter and the temperature of the particulate filter is equal to or lower than a predetermined temperature, and prohibiting drive of the engine, even if the first temperature rise condition is satisfied, when a predetermined first condition that a driver does not intend to drive the engine is satisfied.

2 . The control method for a hybrid vehicle according to claim 1 , wherein
the predetermined first condition is any one of a condition that the hybrid vehicle is set to an EV priority running mode in which charging by the engine is limited, a condition that a vehicle speed is equal to or lower than a predetermined speed, and a condition that an SOC of the battery is greater than a predetermined value.

3 . The control method for a hybrid vehicle according to claim 1 , further comprising:
driving the engine to raise the temperature of the particulate filter, even if the predetermined first condition is satisfied, when a second temperature rise condition is satisfied in which a second predetermined amount or more of the particulate matter which is greater than the first predetermined amount is accumulated in the particulate filter and the temperature of the particulate filter is equal to or lower than the predetermined temperature.

4 . The control method for a hybrid vehicle according to claim 1 , further comprising:
prohibiting the drive of the engine when a predetermined second condition that requires protection of vehicle components is satisfied, even if the first temperature rise condition is satisfied and the predetermined first condition is not satisfied.

5 . The control method for a hybrid vehicle according to claim 3 , further comprising:
prohibiting the drive of the engine when a predetermined second condition that requires protection of vehicle components is satisfied, even if the second temperature rise condition is satisfied.

6 . The control method for a hybrid vehicle according to claim 4 , wherein
the predetermined second condition is any one of a condition that an SOC of the battery is equal to or higher than an allowable charge upper limit value, and a condition that it is necessary to limit the drive of the engine in order to protect the vehicle components.

7 . The control method for a hybrid vehicle according to claim 1 , further comprising:
driving the engine at an operating point at which an exhaust gas temperature is lower than an operating point at which the temperature of the particulate filter is raised when the first temperature rise condition is satisfied and the predetermined first condition is not satisfied at catalyst warm-up time or at brake negative pressure request time.

8 . A control device for a hybrid vehicle, comprising:
a generator configured to charge a battery by using power of an engine; an electric motor configured to drive a driving wheel by electric power of the battery; a particulate filter configured to collect particulate matter contained in exhaust gas from the engine; and a controller configured to drive the engine to raise a temperature of the particulate filter when a first temperature rise condition is satisfied in which a first predetermined amount or more of the particulate matter is accumulated in the particulate filter and the temperature of the particulate filter is equal to or lower than a predetermined temperature, wherein the controller is configured to prohibit drive of the engine when a predetermined first condition that a driver does not intend to drive the engine is satisfied.

Assignees

• Nissan Motor

Inventors

• Hoshi Kiyoshi
• Gotou Kenichi
• Kobayashi Azusa

Classifications

• F01N2900/10

  said parameters being related to the vehicle or its components · CPC title

• F01N2900/104

  Battery status · CPC title

• F01N9/002

  of filter regeneration · CPC title

• F01N3/023

  using means for regenerating the filters, e.g. by burning trapped particles · CPC title

• F01N2900/1606

  Particle filter loading or soot amount · CPC title