Denso Corporation

Denso Corpora Tion

Hiroshige Matsui

Inao Toyoda

Hisayuki Takeuchi

Kiyoshi Otsuka

In a manufacturing method of a pressure detector, a first member that includes a sensing portion for outputting an electric signal in accordance with a pressure, a second member that includes a pressure-receiving diaphragm, and a pressure transmission member are prepared. The pressure transmission member is disposed between the sensing portion and the pressure-receiving diaphragm and the first member and the second member are welded in a state where the pressure is applied from the pressure-receiving diaphragm to the sensing portion through the pressure transmission member. One of the first member and the second member are strained so that a preliminary load, which is applied from the pressure-receiving diaphragm to the sensing portion through the pressure transmission member in a state where no external pressure is applied to the pressure-receiving diaphragm, meets a predetermined value.

Pressure detector and method of manufacturing the same

The pressure sensor includes a first tubular member including at one end portion thereof a sensing section outputting an electrical signal indicative of a pressure applied thereto, and an opening section formed at the other end portion thereof, a second tubular member including an opening section formed at one end portion thereof and a diaphragm located at one end portion thereof, a housing having an opening at one end portion thereof, and a pressure transmission member operating to transmit a pressure applied thereto to the sensing section. The first and second tubular members are integrally connected to each other at their the opening sections. A fixing portion between the first and the second tubular members is located inside the housing, an outer periphery of the second tubular member is fixed to an inner periphery of the opening section of the housing.

Combustion pressure sensor

The pressure sensor of the type having a pressure transmitting member transmitting a pressure received by a pressure-receiving diaphragm to a sensor chip is provided with a heat radiating member. This heat radiating member substantially suppresses the heat transferring from the pressure-receiving diaphragm to the sensor chip, to thereby preventing the pressure sensor from malfunction.

Pressure sensor

A pressure sensor is attached to an engine by inserting a cylindrical metal case having a hollow part into an attaching hole formed in the engine in which engine oil flows. An oil passage is formed in the cylindrical metal case, and oil passages are formed in the housing. The pressure sensor is connected to the engine through an oil transmitting pipe and an oil returning pipe in order to radiate thermal energy of a pressure sensing diaphragm and a pressure sensing chip by flowing the engine oil from the engine to the hollow part of the metal case and by returning the engine oil from the hollow part to the engine.

Pressure sensor and attaching mechanism thereof

A pressure sensor includes a sensor element having a sensing portion for generating a signal upon receiving a pressure, a pressure transmission member having one end attached to a sensing portion of the sensor element and a diaphragm having two sides that warp under application of the pressure. One side of the diaphragm serves as a pressure sensing surface for detecting the pressure applied thereon and another side serves as an attachment surface to be attached to another end of the pressure transmission member for transmitting the pressure to the sensing portion of the sensor element, and the diaphragm takes a shape of corrugation that has a plural number of bends formed therein.

A pressure detection device includes a sensing part that is provided at one end portion of the housing to output an electrical signal responsive to an applied pressure, a circuit part that is provided at an other end portion of the housing to process the signal from the sensing part, and a flexible printed board provided in the housing between the sensing part and the circuit part. Furthermore, the flexible printed board has a first end portion electrically connected to the sensing part at a first connecting part, and a second end portion electrically connected to the circuit part at a second connecting part. In the pressure detection device, the flexible printed board is shaped between the first and second end portions to relieve a stress applied to the connecting parts.

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Aichi-ken, Japan

Hiroshige Matsui