Nissan Motor Company Limited

Nissan Motor Corp.

Akio Ashikaga

Takeshi Tsuyuki

Kenji Suzuki

Takeshi Miyamoto

Toshio Hashimoto

Kazuki Tanzawa

Tomoki Itou

Kentaro Yamano

Atsushi Maekawa

Taichi Andou

A hybrid vehicle includes a generator capable of generating and supplying power to a battery; a drive motor that drives driving wheels of the hybrid vehicle with power supplied from the battery or power generated by the generator, an internal combustion engine that drives the generator; and a first exhaust purification device for exhaust purification arranged in an exhaust passage of the internal combustion engine. The hybrid vehicle is configured to perform catalyst temperature rise control to retard an ignition timing of the internal combustion engine when a temperature of the first exhaust purification device is lower than or equal to a predetermined temperature level. In the catalyst temperature rise control, a retardation amount of the ignition timing in a state where the hybrid vehicle experiences more vibration than in a stop state of the hybrid vehicle is set larger than that in the stop state of the hybrid vehicle.

Hybrid vehicle control method and hybrid vehicle control device

An internal combustion engine is mounted for power generation in a series hybrid vehicle and has an exhaust system with an upstream-side catalytic converter and a downstream-side catalytic converter. After starting of the internal combustion engine, the operation of the internal combustion engine is continued, without stopping the internal combustion engine even when the power generation request ceases, until completion of the warm-up of both of the upstream-side catalytic converter and the downstream-side catalytic converter. The internal combustion engine is operated with ignition timing retardation during a first period from the starting of the internal combustion engine to the completion of the warm-up of the upstream-side catalytic converter. During a second period from the completion of the warm-up of the upstream-side catalytic converter to the completion of the warm-up of the downstream-side catalytic converter, the internal combustion engine is operated without ignition timing retardation.

Catalyst warm-up control method for internal combustion engine, and catalyst warm-up control device

When atmospheric pressure (Pa) which varies according to altitude is higher than a predetermined pressure threshold (Path) during idle operation in which catalyst warm-up request is issued, an intake pressure is controlled, through a throttle valve (), to an intake pressure at which an intake air amount required to promote the warm-up of a catalyst converter () is obtained. When the atmospheric pressure (Pa) is lower than the predetermined pressure threshold (Path), the intake pressure is controlled, through a throttle valve (), to an intake pressure (Pa&#x2212;Pb) at which a differential pressure (Pb) required by a brake booster () is obtained. Accordingly, negative pressure in the brake booster () can be secured while promoting the warm-up of the catalyst during the idle operation.

Method for controlling internal combustion engine and device for controlling same

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Kanagawa, Japan

Akio Ashikaga