Method for controlling hybrid vehicle and hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2023407802-A1
Application number	US-202018037422-A
Country	US
Kind code	A1
Filing date	Nov 18, 2020
Priority date	Nov 18, 2020
Publication date	Dec 21, 2023
Grant date	—

Abstract

A hybrid vehicle includes a motor serving as a drive source, a battery configured to supply electric power to the motor, and an engine capable of supplying electric power to the battery by driving a generator. In the hybrid vehicle, the engine is operated when a magnitude of background noise exceeds a noise threshold value, in a case where an operation parameter for operating the engine when a value of the operation parameter falls below a forced operating threshold value is larger than the forced operating threshold value, the operation parameter being a parameter whose value increases as an operation time of the engine increases.

First claim

1 .- 14 . (canceled)

15 . A method for controlling a hybrid vehicle, wherein:
providing the hybrid vehicle, which comprises:
a motor serving as a drive source,
a battery configured to supply electric power to the motor, and
an engine capable of supplying electric power to the battery by driving a generator; and
operating the engine when a magnitude of background noise exceeds a noise threshold value, in a case where an operation parameter for operating the engine when a value of the operation parameter falls below a forced operating threshold value is larger than the forced operating threshold value, the operation parameter being a parameter whose value increases as an operation time of the engine increases.

16 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the engine is stopped when the operation parameter exceeds a stop threshold value.

17 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the engine is stopped when the magnitude of the background noise falls below the noise threshold value.

18 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
in a case where it is determined that the hybrid vehicle travels on a congested road, the engine is stopped when the magnitude of the background noise falls below the noise threshold value and a vehicle speed of the hybrid vehicle is zero.

19 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the noise threshold value is set be larger as the operation parameter is larger.

20 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
when the magnitude of the background noise exceeds the noise threshold value, the larger the background noise, the larger an output of the engine.

21 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the operation parameter is a temperature of a catalyst provided in an exhaust path of the engine.

22 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the operation parameter is a temperature of cooling water in the engine.

23 . The method for controlling a hybrid vehicle according to claim 16 , wherein:
the operation parameter is a temperature of a catalyst provided in an exhaust path of the engine, or a temperature of cooling water in the engine, and the lower a temperature of outside air with respect to the hybrid vehicle, the larger a threshold value to be compared with the operation parameter in stop determination of the engine.

24 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the operation parameter is an SOC of the battery.

25 . The method for controlling a hybrid vehicle according to claim 16 , wherein:
the operation parameter is an SOC of the battery, and the higher a speed of the hybrid vehicle, the larger a threshold value to be compared with the operation parameter in stop determination of the engine.

26 . The method for controlling a hybrid vehicle according to claim 15 , wherein:
the operation parameter is a negative pressure of a vacuum servo provided in a brake of the hybrid vehicle.

27 . The method for controlling a hybrid vehicle according to claim 16 , wherein:
the operation parameter is a negative pressure of a vacuum servo provided in a brake of the hybrid vehicle, and the higher an operation frequency of the brake, the larger a threshold value to be compared with the operation parameter in stop determination of the engine.

28 . A hybrid vehicle comprising:
a motor serving as a drive source; a battery configured to supply electric power to the motor; an engine capable of supplying electric power to the battery by driving a generator; and a controller configured to control the engine, wherein: the controller is configured to operate the engine, when a magnitude of background noise exceeds a noise threshold value, in a case where an operation parameter for operating the engine when a value of the operation parameter falls below a forced operating threshold value is larger than the forced operating threshold value, the operation parameter being a parameter whose value increases as an operation time of the engine increases.

Assignees

• Nissan Motor

Inventors

• Tezuka Atsushi

Classifications

• F02D41/0235 Primary

  in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N) · CPC title

• B60W20/00

  Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} · CPC title

• F02D2200/0802

  Temperature of the exhaust gas treatment apparatus · CPC title

• F02D2200/702

  Road conditions · CPC title

• F02D2200/50

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