Nissan Motor Company Limited

Renault S.a.s.

New H Powertrain Holding, S.l.u.

Ryo Echigo

Yoshiyasu Kimura

A vehicle () is a hybrid vehicle including a traveling mode to travel only with the driving force of a drive motor (). Vehicle () is mounted with an internal combustion engine () capable of being operated at an air-fuel ratio leaner than the theoretical air-fuel ratio. The operation of internal combustion engine () is controlled by a control unit (). Control unit () is configured to determine whether to stop internal combustion engine () in an operation state, in consideration of the NOx adsorption ratio of a downstream-side exhaust purification catalyst () provided in an exhaust passage () of internal combustion engine ().

Method for controlling internal combustion engine and device for controlling internal combustion engine

In the present invention, an internal combustion engine () drives a generator (). The internal combustion engine () carries out a standby operation. The standby operation is an operation involving assisting power supply to a drive motor (). During the standby operation of the internal combustion engine (), the SoC of a battery () is equal to or higher than a predetermined SoC threshold. The operating point of the internal combustion engine () during the standby operation is further on a lower-output side than the operating point of the same during the charging of the battery (). The operating point of the internal combustion engine () during the standby operation is an operating point in which the collector pressure of the internal combustion engine () is equal to or higher than a predetermined collector pressure threshold. The operating point of the internal combustion engine () during the standby operation is within a lean combustion region.

Vehicle control method and vehicle control device

A vehicular internal combustion engine system includes an internal combustion engine and an electric intake air supply device. The internal combustion engine is shifted into a stoichiometric combustion mode, and a lean combustion mode. The electric intake air supply device is driven by an on-vehicle battery, and employed to contribute a part of intake air quantity at least under a specific operating condition when in the lean combustion mode. A control method includes: determining a requested electric energy of the electric intake air supply device for a shift into the lean combustion mode in response to a shift from a stoichiometric combustion operation region into a lean combustion operation region; and continuing the stoichiometric combustion mode, without operation of the electric intake air supply device, when the on-vehicle battery is in an insufficient state of charge with respect to the requested electric energy.

Control method and control device for vehicular internal combustion engine

A vehicular internal combustion engine system includes an internal combustion engine and an electric intake air supply device. The internal combustion engine is shifted into a stoichiometric combustion mode, and a lean combustion mode. The electric intake air supply device is driven by an on-vehicle battery, and employed to contribute a part of intake air quantity at least under a specific operating condition when in the lean combustion mode. A control method includes: determining an electric energy of the electric intake air supply device that is required to maintain achievement of a target air fuel ratio of the lean combustion mode when in a lean combustion operation region; and causing a shift from the lean combustion mode into a stoichiometric combustion mode when the on-vehicle battery is in an insufficient state of charge with respect to the electric energy.

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Kanagawa, Japan

Ryo Echigo