Denso Corporation

Nippondenso Co., Ltd.

Hideki Matsuura

Noboru Kitahara

Yasushi Goka

Hajime Akado

Yutaka Kawashima

Akihide Yamaguchi

Masahiro Ohba

Katsunori Ito

Hisamitsu Yamazoe

Tomomi Taniguchi

A substrate includes a first surface portion, which covers a heat receiving portion of a radiation member together with a resinous member. The substrate further includes a second surface portion, which is on the outer periphery of the first surface portion. The substrate makes contact with the resinous member via the second surface portion. The first surface portion and the heat receiving portion have a first contact boundary therebetween. The second surface portion and the resinous member have a second contact boundary that surrounds the first contact boundary. The second contact boundary is sealed using a sealing member. The sealing member is restricted from flowing into a boundary between the first contact boundary and the second contact boundary.

Sealing structure and a flowmeter using the same

A measurement body is provided with a sub-outlet arranged between a U-turn portion of a bypass passage and a main outlet. The sub-outlet includes a first sub-outlet positioned on a path of air, which flows on the inside of the bypass passage, and a second sub-outlet positioned on a path of air, which flows on the outside of the bypass passage. The respective sub-outlets open in a sidewall surface of the measurement body along the thickness-wise direction. However, the first sub-outlet and the second sub-outlet are arranged in different positions with respect to the flow direction of measurement air. With this structure, a substantial length of the bypass passage can be adjusted in accordance with positions of the first sub-outlet and the second sub-outlet, so that compensation of intake pulsation is enhanced in accuracy. Thereby, measurement error caused by influences of intake pulsation can be reduced.

Air flow rate measuring device having bypass passage

A sensing unit is constructed of a heater element and a temperature sensing element. The sensing unit is arranged in a region, in which measurement air, which flows into the inflow passage through the bypass inlet, bends at the substantially right-angle and contracts in flow. Alternatively, the sensing unit is arranged in a region immediately after an area, in which the measurement air flowing through the bypass inlet bends at the substantially right-angle. The lengthwise directions of the heater element and the temperature sensing element are respectively arranged to be in parallel with both thickness-wise side faces of the measurement body. Thereby, even when a flow rate of measurement air changes, an influence due to the change can be restricted from being exerted. Therefore, the maximum flow rate can be measured within the lengthwise range of the heater element from a low flow rate to a high flow rate.

Air flow rate measuring device having sensing unit

An airflow meter has a bypass passage disposed in an air passage and a sensing portion disposed in the bypass passage to detect an airflow amount. The bypass passage is provided with a restriction portion to gradually decrease a passage width of the bypass passage in an airflow direction in the bypass passage. The restriction portion includes a first restriction portion and the second restriction portion disposed at an immediately downstream side of a narrowest portion of the first restriction portion. The first restriction portion gradually decreases the passage width in the airflow direction. The second restriction portion increases the passage width than the passage width at the narrowest portion in a stepped manner. The sensing portion is located in a bound in which the restriction portion is disposed.

Airflow meter

An air flow measuring apparatus having a measuring plate provided within an air intake pipe and a potentiometer having divided resistor material, a slider support member and switching contacts in which the shaft of the measuring plate and the shaft of the slider support member of the potentiometer interlock with each other, and corresponding electrical signals are produced from the potentiometer in accordance with the pivotal movement of the measuring plate, which pivotal movement is proportional to the intake air flow. With this construction, highly accurate measurement of the intake air flow is possible even with low manufacturing cost for the apparatus.

Air flow measuring apparatus

This specification discloses an exhaust gas cleaning device which is intended for removing harmful substances from exhaust gases of internal combustion engine, especially for removing carbon particles or the like. The device has a body accomodating a filter element adapted to catch the particles in the exhaust gases. The device is attached to the engine as if it were an exhaust manifold so that the clogging particles are conveniently burned by hot gases, whereby the filter element is conveniently recovered.

Growing community of inventors

Kariya, Japan

Hideki Matsuura