Canon Kabushiki Kaisha

Denso Corporation

Kou Komatsu

Mitsutoshi Hasegawa

Tokutaka Miura

Nobuhiro Ito

Kazuo Koyanagi

A waveform detector detects a variation in fuel pressure generated by an injection based on a detection value of a fuel pressure sensor as a fuel pressure waveform. A differential calculator calculates a differential waveform representing a variation in differential value of the fuel pressure waveform. A noise determiner determines that noise overlaps with the fuel pressure waveform when the differential waveform has a value higher than a predetermined upper threshold or when the differential waveform has a value lower than a predetermined lower threshold.

Noise existence diagnosis device for fuel injection system

A detecting device for a fuel injector includes a sensor unit and an ECU. The sensor unit is provided with a fuel pressure detection circuit which outputs a pressure detection signal in response to a fuel pressure. The ECU computes the fuel pressure based on a voltage value of the pressure detection signal relative to a reference voltage. The ECU obtains a comparative voltage according to an applied-voltage to the fuel pressure detection circuit and computes a deviation between the comparative voltage and the reference voltage. The sensor unit adjusts the applied-voltage in such a manner as to decrease the deviation. Thus, the computation accuracy of the fuel pressure is improved.

Detecting device for fuel injector

Under a vacuum atmosphere, while keeping two members in contact with each other with a bonding material therebetween, one of the members is moved relative to the bonding surface in the horizontal direction, and the bonding material between the members is pressed. The surface oxide film of the bonding material, which is a low melting point metal, is thereby broken effectively, and highly hermetic bonding is performed.

Method for making vacuum airtight container

In a method of making a vacuum vessel having a pair of plates including a face plate and a rear plate bonded to each other using a bonding member, a bonding member is applied to a periphery of at least one of a pair of plates, the plates are placed in contact with each other through the bonding member disposed therebetween, parts of sides of the plates are fastened to each other using a positioning jig made of bimetal, the plates are separated from each other by placing the plates in an atmosphere and by thermally deforming the positioning jig, and the plates are fixed to each other around the entire peripheries thereof using the bonding member by performing cooling so as to reduce thermal deformation of the positioning jig and making the plates contact each other through the bonding member disposed therebetween.

Method of making a vacuum vessel

A bonding member, which can achieve a sufficient degree of vacuum without forming a gap caused by air bubbles that have been released out through the surface of the bonding member, a bonding method, an image display apparatus, and a manufacturing method therefor. The bonding memberof a strip has a first portionand a second portion. The first portionhas a uniform thickness t. The second portionhas a smaller thickness tthan the thickness tof the first portionand constitutes a side plane of the bonding member. The second portionalso has a shape such that a convexity and a concavity alternate along a longitudinal direction of the bonding member

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Chiryu, Japan

Kou Komatsu