Mazda Motor Corporation

Hirotaka Yamakawa

Daisuke Shimo

Kenji Tanimura

Hiromu Sugano

Toru Kobayashi

Hiroshi Minamoto

Masahiro Miyazaki

Koichi Sugimoto

Kengo Nakashima

Ryusuke Sagawa

A control device of a vehicle includes a controller. The vehicle includes an engine having an exhaust system including a combustion chamber and a catalyst, a motor able to operate drive wheels of the vehicle, and a battery which supplies driving power to the motor when the motor operates the drive wheels (motor assist operation), and is charged when the motor generates power (regenerative operation). During deceleration, the controller performs one of a first control which increases an engine resistance for a higher deceleration than requested, and performs the motor assist operation according to the engine resistance increase, when a battery state of charge (SOC) is a first given value or above; and a second control which controls a combustion state of the engine to raise a catalyst temperature, and performs the regenerative operation, when the battery SOC is a second given value below the first given value.

Control device for a battery-powered vehicle

Provided is a start controller for an engine capable of reducing torque of a starter consumed to start the engine. The start controller includes a stop position sensor that detects a position of a piston in each cylinder at an engine stop time, an intake pressure sensor that detects an intake pressure in an intake passage, and a processor that determines whether the position of the piston in each of the cylinders detected by the stop position sensor is within a specified target range after the engine is stopped. In the case where it is determined that the position of the piston in each of the cylinders after the engine stop is out of the target range and the intake pressure detected by the intake pressure sensor is lower than an atmospheric pressure, the engine is started by a motor even when an engine start condition is not satisfied.

Start controller for engine

An intake variable valve timing mechanism (VVT) that collectively changes an intake valve close timing as a close timing of a plurality of intake valves and a control device that controls an engine including a plurality of injectors and the intake VVT are provided. When a specified engine stop condition is satisfied, a fuel cut is performed to stop a fuel supply into a plurality of cylinders by the injector. After the fuel cut, the intake VVT is controlled such that a retarded amount of the intake valve close timing immediately before a stop of a stop-time compression stroke cylinder as a cylinder stopped in a compression stroke from intake bottom dead center is larger than a retarded amount of the intake valve close timing immediately before a stop of a stop-time expansion stroke cylinder as a cylinder stopped in an expansion stroke from the intake bottom dead center.

Stop position controller for engine

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Aki-gun, Japan

Hirotaka Yamakawa