Mikuni Corporation

Katsuhiko Fukui

Akira Yamaguchi

Ren Takahashi

Satoru Fujisaki

Sou Matsumoto

The disclosure provides a combustion abnormality detecting device, a combustion abnormality detecting method, and a non-transitory computer-readable storage medium, a misfire detection accuracy is increased by increasing a piezoelectric detection accuracy. A charge amplifier () outputting a voltage signal corresponding to a charge generated by a piezoelectric element () in response to a received pressure, a drift component extracting part () extracting a drift component of the piezoelectric element (), a drift correcting part () generating a correction signal for removing the drift component based on the extracted drift component and feeding back the correction signal to an input side of the charge amplifier (), and a misfire detecting part () performing misfire detection based on the correction signal are included.

Combustion abnormality detecting device and non-transitory computer-readable storage medium

A pressure detection signal processing device, engine control system, and non-transitory computer readable medium storing a program are provided. A current-voltage conversion part that converts a current signal corresponding to charge generated by a piezoelectric element in accordance with received pressure into a voltage signal, and digital signal processing parts that perform correction for removing a drift caused by a leakage current of the piezoelectric element on the voltage signal through digital signal processing are provided. The digital signal processing parts include a differentiation processing part that performs differentiation processing on the voltage signal, an integration processing part that performs integration processing on the signal having been subjected to the differentiation processing, and an integration processing part that further performs integration processing on the signal having been subjected to the integration processing.

Pressure detection signal processing device, engine control system, and non-transitory computer readable medium storing a program

A glow plug includes: a heater power-conduction shaft that supplies power to a heater; a pressure detection element that is provided in an axial-direction end portion of the heater power-conduction shaft and converts pressure that the heater power-conduction shaft receives in the axial direction into an electrical signal; a first insulation member that surrounds an outer periphery of the pressure detection element with respect to the axis, and allows a signal output terminal of the pressure detection element to protrude toward an outer peripheral side of the axis; a power supply wire that is provided on an outer peripheral side of the first insulation member with respect to the axis, and is connected to the heater power-conduction shaft to supply power to the heater; a signal processing circuit that is provided on an outer peripheral side of the power supply wire with respect to the axis, and is connected to the signal output terminal to process an electrical signal of the pressure detection element; and a second insulation member that is provided between the power supply wire and the signal processing circuit, and insulates the signal processing circuit from the power supply wire.

Glow plug

A hydrogen sensor () is provided with a substrate (), a detection film () formed on the substrate (), and a hydrogen permeable protective film () formed on the detection film (). The detection film () is composed of a first ceramic () and rare-earth metal particles () dispersed in the first ceramic (). The protective film () is composed of a second ceramic () and hydrogen permeable metal particles () dispersed in the second ceramic (). Preferably, the thickness of the detection film () is 5 to 1,000 nm, and the thickness of the hydrogen permeable protective film () is 5 to 40 nm.

Hydrogen sensor with detection film comprised of rare earth metal particles dispersed in a ceramic

A hydrogen-permeable film has a ceramic material of a nitride or oxide of a metal element belonging to group IVB, VB or VIB and hydrogen-permeable metal particles of at least one kind selected from palladium (Pd), niobium (Nb), vanadium (V), tantalum (Ta) and alloys thereof dispersed in the ceramic material. A ratio of the hydrogen-permeable metal particles in the hydrogen-permeable film is 20 to 70 mass %, and a thickness of the hydrogen-permeable film is 5 to 1,000 nm.

Hydrogen permeable film and method for manufacturing the same

According to the present invention there is disclosed a hydrogen sensor comprising

Hydrogen sensor and process for production thereof

According to the present invention there is disclosed a hydrogen-permeable membrane which comprises

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Iwate, Japan

Katsuhiko Fukui