Nippondenso Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Fuji Corporation

Kenji Tanaka

Michio Morishita

Takuya Nagaishi

Toshinobu Nishi

Yasunari Mizuno

Shigeo Saito

Hideaki Ouchi

Fumiya Kato

Akio Fukuba

With a recognition device of the present invention, when a target component that is an imaging target is moved in a direction from one to another of an upper limit imaging position and a lower limit imaging position, a protruding section of the target component is imaged at each of a predetermined pitch (0.1 mm). Then, it is determined whether it is possible to recognize the position of the protruding section of the target component based on image data of each pitch (O: recognition possible, X: recognition not possible). Here, from among imaging positions (Hto H) according to image data for which it was determined to be possible to recognize the position of the protruding section of the target component, a position (H) that is at a central point between a position closest to the upper limit imaging position (H) and a position closest to the lower limit imaging position (H) is decided as a recommended imaging position. By this, it is possible to image the protruding section close to a central point inside the emitting range of the light emitted from the light source, meaning that the protruding section is appropriately imaged and the position of the protruding section can be appropriately recognized.

Recognition device

An engine exhaust gas purification system has a secondary air system for supplying secondary air into the engine exhaust system. The secondary air system has an air metering valve and a switching valve. The air metering valve is operative to meter the secondary air supply in accordance with signals emitted by an air-fuel ratio sensor disposed in the exhaust system to detect the oxygen content of engine exhaust gases. The switching valve is disposed in the secondary air supply line downstream of the air metering valve to interrupt the supply of the secondary air into the exhaust system during a high load engine operation for thereby preventing the exhaust system and, particularly, the catalyst device therein from being overheated. The force to close the switching valve is strong enough to keep the valve closed against the counter-flow of engine exhaust gases from engine exhaust system back into the secondary air system.

Exhaust gas purification system for an internal combustion engine

Growing community of inventors

Toyota, Japan

Kenji Tanaka