Toyota Jidosha Kabushiki Kaisha

Hisayuki Itoh

Masaaki Yamaguchi

Hirokazu Kato

Koji Ichikawa

In an engine system including an engine, and an exhaust gas recirculation device including a communicating pipe that communicates an exhaust pipe of the engine with an intake pipe, and a valve provided in the communicating pipe, and an electronic control unit, and its control method, the electronic control unit estimates the pressure in the intake pipe as an estimated intake pressure, and performs a jamming diagnosis to determine whether foreign matter is stuck in the valve, by comparing an intake pressure difference between a detected intake pressure and the estimated intake pressure with a threshold value, when a diagnosis condition including an opening change condition that the target opening becomes equal to or larger than a first predetermined opening and then becomes equal to or smaller than a second predetermined opening that is smaller than the first predetermined opening is satisfied.

Engine system and method of controlling the engine system

A hybrid vehicle includes an engine, an exhaust gas recirculation device, a traveling motor, and a control device. The exhaust gas recirculation device includes a communication pipe that allows an exhaust pipe and an intake pipe of the engine to communicate with each other and a valve that is provided in the communication pipe. The control device is configured to perform foreign matter removal control for opening and closing the valve when foreign matter caught in the valve is detected and the hybrid vehicle stops.

Hybrid vehicle

A vehicle including: an engine; an exhaust gas recirculation device including a communication pipe by which an exhaust pipe of the engine and an intake pipe of the engine communicating, and a valve that is provided in the communication pipe; and a control device configured to control the engine, to control the valve based on a target opening of the valve, to perform automatic stopping of the engine based on satisfaction of an automatic stopping condition, and to perform automatic starting of the engine based on satisfaction of an automatic starting condition. The control device is configured to prohibit automatic stopping of the engine when it is determined that foreign matter is caught in the valve through catching diagnosis which is diagnosis of whether foreign matter is caught in the valve.

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Toyota, Japan

Hisayuki Itoh