Patents by Inventor Yuki Iwagami
Yuki Iwagami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10447223Abstract: Provided is a gain control amplification device having a wide range and high accuracy and configured to adapt measurement target current to the input range of an A/D converter. The gain control amplification device includes: a plurality of differential amplifiers having different gains with respect to measurement target current or voltage; a threshold control circuit for comparing output of the differential amplifier with threshold voltage; a switch for selecting output of one of the plurality of differential amplifiers on the basis of output of the threshold control circuit; and an offset control circuit OF and an addition circuit for adding offset voltage to output of one of the differential amplifiers.Type: GrantFiled: December 7, 2017Date of Patent: October 15, 2019Assignee: Mitsubishi Electric CorporationInventors: Masanori Kurimoto, Yuki Iwagami, Masamitsu Uchiyama
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Patent number: 10416220Abstract: Even when parts having individual differences among identical parts or differences in deterioration speed between parts, or a part that does not have a non-volatile memory such as an EEPROM in a chip of the part itself, are mixed, there is no deterioration diagnosis device that can appropriately diagnose a state of deterioration due to temporal change or the like, because of which a mechanism (correction methodology) for evaluating and correcting deterioration in the precision or performance of an electronic part that has low precision or considerable temporal deterioration, and does not have a correction function, is incorporated in a deterioration diagnosis device, and a deterioration state is diagnosed using incorporated deterioration determination means when using a product after shipping.Type: GrantFiled: February 3, 2017Date of Patent: September 17, 2019Assignee: Mitsubishi Electric CorporationInventors: Masanori Kurimoto, Yuki Iwagami, Yoshitake Nishiuma, Takayuki Yanai
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Patent number: 10385796Abstract: A downlink communication data DND from a main control circuit section to a combination control circuit section is divided into first and second downlink data, high-speed communication using a downlink clock signal and a transmission start instruction signal is performed, a high-speed load which has been directly driven from the main control circuit section is indirectly driven at high speed from the combination control circuit section by the first downlink data, a low-speed analog input signal ANL which has been indirectly inputted to the combination control circuit section is inputted to a specific input channel of a multi-channel converter through an indirect multiplexer, and channel selection is made by the downlink communication data.Type: GrantFiled: August 22, 2014Date of Patent: August 20, 2019Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Junji Tada, Tomoki Yamamoto
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Patent number: 10340683Abstract: To provide a semiconductor device for driving an electric load to be divided into a plurality of opening/closing devices so that when an abnormality exists in any one of the division devices, that division device can be removed and replaced by an auxiliary device. Each of a plurality of opening/closing circuit units has an upper-side opening/closing device and a lower-side opening/closing device; while load driving is stopped, there is monitored the potential of the connection point between the upper and lower opening/closing devices at a time when any one of the opening/closing devices is closed or both of them are opened, and it is determined whether there exists short-circuit abnormality or disconnection abnormality in each of the opening/closing devices. When abnormality exists, the upper and lower opening/closing devices are removed and the auxiliary circuit is made effective.Type: GrantFiled: July 11, 2017Date of Patent: July 2, 2019Assignee: Mitsubishi Electric CorporationInventors: Takatoshi Murakami, Yuki Iwagami, Mitsunori Nishida
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Publication number: 20180358944Abstract: Provided is a gain control amplification device having a wide range and high accuracy and configured to adapt measurement target current to the input range of an A/D converter. The gain control amplification device includes: a plurality of differential amplifiers having different gains with respect to measurement target current or voltage; a threshold control circuit for comparing output of the differential amplifier with threshold voltage ; a switch for selecting output of one of the plurality of differential amplifiers on the basis of output of the threshold control circuit ; and an offset control circuit OF and an addition circuit for adding offset voltage to output of one of the differential amplifiers.Type: ApplicationFiled: December 7, 2017Publication date: December 13, 2018Applicant: Mitsubishi Electric CorporationInventors: Masanori KURIMOTO, Yuki IWAGAMI, Masamitsu UCHIYAMA
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Publication number: 20180233903Abstract: To provide a semiconductor device for driving an electric load to be divided into a plurality of opening/closing devices so that when an abnormality exists in any one of the division devices, that division device can be removed and replaced by an auxiliary device. Each of a plurality of opening/closing circuit units has an upper-side opening/closing device and a lower-side opening/closing device; while load driving is stopped, there is monitored the potential of the connection point between the upper and lower opening/closing devices at a time when any one of the opening/closing devices is closed or both of them are opened, and it is determined whether there exists short-circuit abnormality or disconnection abnormality in each of the opening/closing devices. When abnormality exists, the upper and lower opening/closing devices are removed and the auxiliary circuit is made effective.Type: ApplicationFiled: July 11, 2017Publication date: August 16, 2018Applicant: Mitsubishi Electric CorporationInventors: Takatoshi MURAKAMI, Yuki IWAGAMI, Mitsunori NISHIDA
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Patent number: 10040440Abstract: A first monitoring control circuit unit monitors controlling operation of an engine control unit (ECU); when the occurrence frequency of an abnormality becomes the same as or larger than a predetermined threshold value, a first storage circuit stores that occurrence frequency and a first cutoff circuit de-energizes an intake valve opening degree control motor for an air-intake throttle so as to set the intake valve opening degree to a fixed intake valve opening degree; a second monitoring control means monitors controlling operation of a transmission control unit (TCU); when the occurrence frequency of an abnormality becomes the same as or larger than a predetermined threshold value, a second storage circuit stores that occurrence frequency and a second cutoff circuit de-energizes a gear-shifting electromagnet valve so as to set the transmission ratio to a fixed transmission ratio.Type: GrantFiled: August 31, 2015Date of Patent: August 7, 2018Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Koji Hashimoto
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Patent number: 9889839Abstract: There is provided a vehicle engine control system that includes engine and transmission control functions and enables evacuation driving to be readily performed. A monitoring control circuit unit and an error processing circuit unit monitors controlling operation of a main control circuit unit; when the occurrence frequency of valve-opening control abnormality becomes larger than threshold value, a first storage circuit stores the occurrence frequency, and driving of an intake valve control motor is stopped to set to fixed opening degree; when transmission-control abnormality is occurs, power supply to automatic transmission is stopped to set to the third speed fixation ratio; when an abnormality occurs, evacuation driving is implemented using fixed opening degree and automatic transmission ratio, variable rotation speed and fixed transmission ratio, or fixed opening degree and fixed transmission ratio.Type: GrantFiled: September 21, 2016Date of Patent: February 13, 2018Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Koji Hashimoto
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Publication number: 20170356947Abstract: Even when parts having individual differences among identical parts or differences in deterioration speed between parts, or a part that does not have a non-volatile memory such as an EEPROM in a chip of the part itself, are mixed, there is no deterioration diagnosis device that can appropriately diagnose a state of deterioration due to temporal change or the like, because of which a mechanism (correction methodology) for evaluating and correcting deterioration in the precision or performance of an electronic part that has low precision or considerable temporal deterioration, and does not have a correction function, is incorporated in a deterioration diagnosis device, and a deterioration state is diagnosed using incorporated deterioration determination means when using a product after shipping.Type: ApplicationFiled: February 3, 2017Publication date: December 14, 2017Applicant: Mitsubishi Electric CorporationInventors: Masanori KURIMOTO, Yuki IWAGAMI, Yoshitake NISHIUMA, Takayuki YANAI
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Publication number: 20170291593Abstract: There is provided a vehicle engine control system that includes engine and transmission control functions and enables evacuation driving to be readily performed. A monitoring control circuit unit and an error processing circuit unit monitors controlling operation of a main control circuit unit; when the occurrence frequency of valve-opening control abnormality becomes larger than threshold value, a first storage circuit stores the occurrence frequency, and driving of an intake valve control motor is stopped to set to fixed opening degree; when transmission-control abnormality is occurs, power supply to automatic transmission is stopped to set to the third speed fixation ratio; when an abnormality occurs, evacuation driving is implemented using fixed opening degree and automatic transmission ratio, variable rotation speed and fixed transmission ratio, or fixed opening degree and fixed transmission ratio.Type: ApplicationFiled: September 21, 2016Publication date: October 12, 2017Applicant: Mitsubishi Electric CorporationInventors: Yuki IWAGAMI, Koji HASHIMOTO
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Patent number: 9779045Abstract: A first external tool (10A) serially connected to an electronic controller (20A) through a pair of communication lines (LANH, LANN) applies a high voltage (Vaa) higher than a normal control voltage (Vcc) to the communication line (LANH) when a program is written. The electronic controller (20A) recognizes connection of the first external tool (10A) by a comparison circuit (212A) for monitoring a received voltage and a write-mode determination circuit (218A), initializes a microprocessor (200), and receives and stores an total control program (TCPRG) in a program memory (204A) based on a content of a boot program memory (201). During an operation of the electronic controller (20A), the external tool (10A) is removed and the high voltage (Vaa) is not applied to the communication line (LANH). Therefore, the electronic control apparatus is not erroneously placed in the write mode.Type: GrantFiled: April 8, 2014Date of Patent: October 3, 2017Assignee: Mitsubishi Electric CorporationInventors: Mitsunori Nishida, Yuki Iwagami, Akihiro Ishii, Osamu Nishizawa, Manabu Yamashita
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Patent number: 9707908Abstract: A driving device 5 includes: a fault detection device 11 that determines a fault in an actuator 6; a serial interface 7 that communicates with an MCU 2; a memory device 10 that stores a program received from the MCU 2 and a fault determination result by the fault detection device 11; a CPU 9 that causes the fault detection device 11 to execute the fault determination according to a fault determination request from the MCU 2; a timer device 16 that measures a limit time over which fault determination is performed and a determination period of fault determination; and a counter device 17 that counts the number of repeats of fault determination and the number of fault occurrences in the actuator 6.Type: GrantFiled: February 16, 2016Date of Patent: July 18, 2017Assignee: Mitsubishi Electric CorporationInventors: Masanori Kurimoto, Yuki Iwagami
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Publication number: 20170101958Abstract: A downlink communication data DND from a main control circuit section to a combination control circuit section is divided into first and second downlink data, high-speed communication using a downlink clock signal and a transmission start instruction signal is performed, a high-speed load which has been directly driven from the main control circuit section is indirectly driven at high speed from the combination control circuit section by the first downlink data, a low-speed analog input signal ANL which has been indirectly inputted to the combination control circuit section is inputted to a specific input channel of a multi-channel converter through an indirect multiplexer, and channel selection is made by the downlink communication data.Type: ApplicationFiled: August 22, 2014Publication date: April 13, 2017Applicant: Mitsubishi Electric CorporationInventors: Yuki IWAGAMI, Junji TADA, Tomoki YAMAMOTO
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Publication number: 20170021782Abstract: A driving device 5 includes: a fault detection device 11 that determines a fault in an actuator 6; a serial interface 7 that communicates with an MCU 2; a memory device 10 that stores a program received from the MCU 2 and a fault determination result by the fault detection device 11; a CPU 9 that causes the fault detection device 11 to execute the fault determination according to a fault determination request from the MCU 2; a timer device 16 that measures a limit time over which fault determination is performed and a determination period of fault determination; and a counter device 17 that counts the number of repeats of fault determination and the number of fault occurrences in the actuator 6.Type: ApplicationFiled: February 16, 2016Publication date: January 26, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masanori KURIMOTO, Yuki IWAGAMI
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Publication number: 20160347326Abstract: A first monitoring control circuit unit monitors controlling operation of an ECU; when the occurrence frequency of an abnormality becomes the same as or larger than a predetermined threshold value, a first storage circuit stores that occurrence frequency and a first cutoff circuit de-energizes an intake valve opening degree control motor for an air-intake throttle so as to set the intake valve opening degree to a fixed intake valve opening degree; a second monitoring control means monitors controlling operation of a TCU; when the occurrence frequency of an abnormality becomes the same as or larger than a predetermined threshold value, a second storage circuit stores that occurrence frequency and a second cutoff circuit de-energizes a gear-shifting electromagnet valve so as to set the transmission ratio to a fixed transmission ratio.Type: ApplicationFiled: August 31, 2015Publication date: December 1, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuki IWAGAMI, Koji HASHIMOTO
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Patent number: 9234941Abstract: There is provided a low-cost electronic control unit that is capable of performing its hardware check every start and stop of the electronic control unit. A monitoring and control circuit section that is an integrated circuit element built in the electronic control unit includes a self-test circuit configured with a built-in self-test control block, scan chain circuits and mask circuitry, and performs a self-test using the built-in self-test control block and a partial combination of the scan chain circuits at start of the operation. In the shipment inspection of the integrated circuit element alone, an external test is performed by a checker microprocessor using an entire combination of the scan chain circuits. Thus, the electronic control unit of low-cost configuration is capable of performing a scan test by making use of part of the scan chain circuits designed for the component inspection.Type: GrantFiled: April 1, 2014Date of Patent: January 12, 2016Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Susumu Tanaka
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Publication number: 20150120974Abstract: A first external tool (10A) serially connected to an electronic controller (20A) through a pair of communication lines (LANH, LANN) applies a high voltage (Vaa) higher than a normal control voltage (Vcc) to the communication line (LANH) when a program is written. The electronic controller (20A) recognizes connection of the first external tool (10A) by a comparison circuit (212A) for monitoring a received voltage and a write-mode determination circuit (218A), initializes a microprocessor (200), and receives and stores an total control program (TCPRG) in a program memory (204A) based on a content of a boot program memory (201). During an operation of the electronic controller (20A), the external tool (10A) is removed and the high voltage (Vaa) is not applied to the communication line (LANH). Therefore, the electronic control apparatus is not erroneously placed in the write mode.Type: ApplicationFiled: April 8, 2014Publication date: April 30, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Mitsunori NISHIDA, Yuki IWAGAMI, Akihiro ISHII, Osamu NISHIZAWA, Manabu YAMASHITA
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Patent number: 8994220Abstract: In a vehicle-mounted electronic control device having a switching power supply in which a switching element is controlled to obtain a predetermined intermediate voltage Va stepped down from a vehicle-mounted battery, and to which a downstream side coil, a flywheel diode, and an output capacitor are connected to suppress a pulsating voltage, a circuit for suppressing reverse conduction for the switching element is provided in order to prevent that the switching element is reversely conducted and thus a charging voltage of the output capacitor is abnormally lowered when a power supply voltage Vb of the vehicle-mounted battery is abnormally lowered.Type: GrantFiled: January 5, 2012Date of Patent: March 31, 2015Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Koji Hashimoto, Manabu Yamashita, Yuji Zushi, Mitsunori Nishida
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Publication number: 20140365839Abstract: There is provided a low-cost electronic control unit that is capable of performing its hardware check every start and stop of the electronic control unit. A monitoring and control circuit section that is an integrated circuit element built in the electronic control unit includes a self-test circuit configured with a built-in self-test control block, scan chain circuits and mask circuitry, and performs a self-test using the built-in self-test control block and a partial combination of the scan chain circuits at start of the operation. In the shipment inspection of the integrated circuit element alone, an external test is performed by a checker microprocessor using an entire combination of the scan chain circuits. Thus, the electronic control unit of low-cost configuration is capable of performing a scan test by making use of part of the scan chain circuits designed for the component inspection.Type: ApplicationFiled: April 1, 2014Publication date: December 11, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuki IWAGAMI, Susumu TANAKA
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Patent number: 8321063Abstract: An electronic control apparatus is provided in which a supervisory control circuit part capable of mutual communication with a main control circuit part, which is operated by a high speed clock signal of high precision, is operated by a medium speed clock signal, which is low in cost and precision, such that they can operate mutually independently of each other. The main control circuit part supplies a medium speed communication synchronization signal frequency divided to the supervisory control circuit part. The supervisory control circuit part is operated by the medium speed clock signal to supervise the control operation of the main control circuit part. An error measuring circuit calculates an error correction coefficient which is the ratio of the signal cycle of the communication synchronization signal to that of the medium speed clock signal. The value of the error correction coefficient is reversely supervised by the main control circuit part.Type: GrantFiled: September 1, 2010Date of Patent: November 27, 2012Assignee: Mitsubishi Electric CorporationInventors: Yuki Iwagami, Koji Hashimoto, Manabu Yamashita