Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Denso Corporation

Aisin Takaoka Co., Ltd.

Hitoshi Uda

Rie Osaki

Yoshihito Moriya

Noriyasu Amano

Hiroki Ichinose

Senji Kato

Hiroshi Nakamura

Naoya Kato

Nobuhisa Ohkawa

Tadahisa Naganawa

Yoshiya Yamashita

Hitoshi Noguchi

Shigeru Sone

Junji Watanabe

Yukihiro Tsukasaki

Kazuki Matsuo

Yuji Yoshihara

Tsukasa Nagayama

Akihiro Hosono

In an exhaust gas-cooling pipe element provided between an exhaust port of an internal combustion engine and an exhaust branch pipe, a center axis of an exhaust introduction opening that is connected to the exhaust port and a center axis of an exhaust discharge opening that is connected to the exhaust branch pipe are placed out of alignment with each other.

Exhaust gas-cooling pipe element and internal combustion engine exhaust system

A particulate concentration detector including a detection mechanism having a light emission unit and light reception unit. The particulate concentration detector detects the concentration of particulates suspended in a liquid from the light amount detected by the detection mechanism. The detection mechanism includes a first light guide, a second light guide, a liquid chamber, and a third light guide. The first light guide is arranged at a location facing toward a light emission surface of the light emission unit. The second light guide is arranged at a location facing toward a light reception surface of the light reception unit. The liquid chamber is formed between the first light guide and second light guide and allows the liquid to flow therein. The third light guide is arranged in an oscillatable manner in the liquid chamber so as to face toward the first light guide and the second light guide.

Particle concentration detecting device

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

An improvement of a valve timing control apparatus for an engine is disclosed. The apparatus has an intake valve and an exhaust valve which are alternately opened and closed in a valve timing sequence according to a rotation of a cam shaft. A timing pulley mounted on the cam shaft has a housing accommodating a plunger movable therein and a sleeve secured to the cam shaft. The housing has a first and second pressure chambers defined by the plunger and sealed with respect to each other. The plunger is arranged to move in an axial direction to selectively advance and retard the cam shaft based on differential pressure between the first pressure chamber and the second pressure chamber. A controller controls an electromagnetic valve with a specific control value to adjust the fluid pressure to be supplied to the first and second pressure chambers to maintain the valve timing sequence converged to a target valve timing. The controller corrects the specific value based on a rotational speed of the engine when the plunger is in one of the extreme positions in the chambers, and adjusts the fluid pressures based on the corrected specific value.

Valve timing control apparatus for engine

Growing community of inventors

Toyota, Japan

Hitoshi Uda