Control method of hybrid vehicle and control device of hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2021402978-A1
Application number	US-201817292099-A
Country	US
Kind code	A1
Filing date	Nov 8, 2018
Priority date	Nov 8, 2018
Publication date	Dec 30, 2021
Grant date	—

Abstract

Provided is a control method of a hybrid vehicle provided with an engine, a power-generation motor generator, and a travel motor generator. The hybrid vehicle has a series hybrid mode in which the power-generation motor generator is driven by the engine to generate electric power and the travel motor generator is driven by the electric power generated by the power-generation motor generator. The hybrid vehicle has a filter configured to collect a particulate matter in exhaust gas from the engine. The control method includes performing an operation limitation of the engine based on a loaded amount of the particulate matter in the filter.

First claim

1 .- 8 . (canceled)

9 . A control method of a hybrid vehicle provided with an engine, a power-generation motor generator, and a travel motor generator, the hybrid vehicle having a series hybrid mode in which the power-generation motor generator is driven by the engine to generate electric power and the travel motor generator is driven by the electric power generated by the power-generation motor generator, and the hybrid vehicle having a filter configured to collect a particulate matter in exhaust gas from the engine, the control method comprising:
shifting an operating point of the engine to an operating point at which an exhaust-gas temperature increases in a case where a loaded amount of the particulate matter in the filter is greater than a first predetermined amount and a temperature of the filter is lower than a refreshment-allowing temperature of the filter; and performing a motoring of the engine by the power-generation motor generator in a case where the loaded amount is equal to or greater than a second predetermined amount which is a loaded amount smaller than the first predetermined amount and the temperature of the filter is equal to or higher than the refreshment-allowing temperature of the filter.

10 . The control method of the hybrid vehicle according to claim 9 , wherein
the first predetermined amount is a loaded amount corresponding to a case where an allowable temperature of the filter is a temperature according to a maximum exhaust-gas temperature of the engine in a relationship between the loaded amount and the allowable temperature of the filter.

11 . The control method of the hybrid vehicle according to claim 9 , wherein
a motoring regenerative braking in which a regenerative braking is performed by the travel motor generator and a motoring of the engine is performed by the power-generation motor generator using the electric power regenerated by the travel motor generator is performed as the motoring.

12 . The control method of the hybrid vehicle according to claim 11 , further comprising
performing a charging regenerative braking in which the regenerative braking is performed by the travel motor generator and a battery is charged with the electric power regenerated by the travel motor generator, wherein upon performing the motoring regenerative braking, the motoring regenerative braking is performed even in a case where the charging regenerative braking can be performed.

13 . The control method of the hybrid vehicle according to claim 11 , wherein
upon performing the motoring regenerative braking, the motoring regenerative braking is performed in a case where, in addition, a battery state of charge indicating a charged state of the battery is greater than a predetermined state.

14 . The control method of the hybrid vehicle according to claim 9 , wherein
an operation limitation of the engine is performed based on the loaded amount, and the operation limitation is not performed in a case where the loaded amount is equal to or smaller than the first predetermined amount.

15 . A control device of a hybrid vehicle provided with an engine, a power-generation motor generator, and a travel motor generator, the hybrid vehicle having a series hybrid mode in which the power-generation motor generator is driven by the engine to generate electric power and the travel motor generator is driven by the electric power generated by the power-generation motor generator, and the hybrid vehicle having a filter configured to collect a particulate matter in exhaust gas from the engine, the control device comprising a controller:
configured to shift an operating point of the engine to an operating point at which an exhaust-gas temperature increases in a case where a loaded amount of the particulate matter in the filter is greater than a first predetermined amount and a temperature of the filter is lower than a refreshment-allowing temperature of the filter; and configured to perform a motoring of the engine by the power-generation motor generator in a case where the loaded amount is equal to or greater than a second predetermined amount which is a loaded amount smaller than the first predetermined amount and the temperature of the filter is equal to or higher than the refreshment-allowing temperature of the filter.

16 . The control method of the hybrid vehicle according to claim 12 , wherein
upon performing the motoring regenerative braking, the motoring regenerative braking is performed in a case where, in addition, a battery state of charge indicating a charged state of the battery is greater than a predetermined state.

Assignees

• Nissan Motor

Inventors

• Tsuyuki Takeshi

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• B60K6/46

  Series type · CPC title

• F01N3/021

  by means of filters · CPC title

• B60W20/14

  in conjunction with braking regeneration · CPC title

• B60W10/06

  including control of combustion engines · CPC title