Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Denso Corporation

Yukihiro Tsukasaki

Kotaro Hayashi

Rie Osaki

Shinya Hirota

Toshiaki Tanaka

Masaaki Kobayashi

Takamitsu Asanuma

Kazuhiro Itoh

Hiroki Matsuoka

Koichiro Nakatani

Tomihisa Oda

Koichi Kimura

Noriyasu Amano

Hiroki Ichinose

Daisuke Shibata

Naofumi Magarida

Satoshi Taniguchi

Hiroshi Nakamura

Tomoyuki Ono

Souichi Matsushita

Shinobu Ishiyama

Hitoshi Noguchi

Yasuo Harada

Hitoshi Uda

Akihiko Negami

Kaori Yoshida

Souichi Matushita

Yasuhiro Ohtsubo

Naoyo Kato

Akihiro Negami

It is an object of the present invention to provide a fuel property detection apparatus that excels in durability and reliability and is capable of accurately detecting the biofuel concentration in a mixture of hydrocarbon fuel and biofuel with a compact and simple configuration. A fuel property sensorincludes a light-emitting deviceand a light-receiving device, which detect the optical transmittance of a fuel in a fuel path; and a light-emitting deviceand a position sensitive device, which detect the refractive index of the fuel. As the optical transmittance correlates with the RME concentration of the fuel, the RME concentration can be calculated from the detected optical transmittance. As the refractive index correlates with the cetane number of the fuel, the cetane number can be calculated from the detected refractive index. The optical transmittance is detected through the use of light within a wavelength range of 640 nm to 680 nm.

Fuel property detection apparatus

A fuel property sensor is provided with three bypass passages and a measure passage. The measure passage is located inside of a closed loop which is comprised of common tangential lines of adjacent bypass passages and a part of profile line of each bypass passage in a cross section perpendicular to the measure passage. Even if the fuel property sensor is rotated around the axis of a fuel pipe in assembling the fuel property sensor to the fuel pipe, at least one of two bypass passages is always located above the measure passage in a vertical direction. Hence, bubbles included in the fuel are restricted from flowing into the measure passage. The fuel property sensor can detect the concentration of ethanol contained in the fuel with high accuracy.

Fuel property detector

A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device includes a particulate filter arranged in the exhaust system, which carries a catalyst for absorbing and reducing NO. The catalyst absorbs NOwhen the air-fuel ratio in the surrounding atmosphere thereof is lean and releases the absorbed NOto purify NOby reduction when the air-fuel ratio is stoichiometric or rich. The device further includes a catalytic apparatus for purifying NOarranged in the exhaust system upstream of the particulate filter, which has an oxidation function.

Device for purifying the exhaust gas of an internal combustion engine

A NOx catalyst in the exhaust passage of an internal combustion engine is capable of lean burn and adapted to release and reduce absorbed NOx by a reducing agent. Reducing agent supplier is provided in the exhaust passage on the upstream side of the NOx catalyst. A load detector detects the load of an internal combustion engine. Reducing agent addition controller controls the reducing agent addition period and the reducing agent addition interval based on the load of the internal combustion engine, whereby sufficient reducing agent is supplied to the NOx catalyst side independently of the operating condition.

Exhaust emission control device of internal combustion engine

Growing community of inventors

Susono, Japan

Yukihiro Tsukasaki