Patents by Inventor Kiyonori Sekiguchi
Kiyonori Sekiguchi 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: 7243151Abstract: A home gateway apparatus that can control the power in each current carrying unit, and lower the power consumption is provided; by dividing the apparatus into a first system that has a minimum function to connect with the Internet, and a second system that has necessary functions to execute applications on the Ethernet®. Both the first and second systems are controlled individually, so that the power is turned on/off separately. Also, when the second system without the power is turned on, an Ethernet® connection controller is provided as an interface to avoid the interface connectivity problem, and an IP address is automatically obtained after turning on the power.Type: GrantFiled: March 27, 2002Date of Patent: July 10, 2007Assignee: Panasonic Communications Co., Ltd.Inventor: Kiyonori Sekiguchi
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Patent number: 7152392Abstract: A diesel particulate filter (DPF) having an oxidation catalyst is disposed between exhaust pipes of an internal combustion engine. An exhaust gas temperature sensor senses outlet gas temperature of the DPF. An engine control unit (ECU) calculates estimated central temperature of the DPF from an output of the exhaust gas temperature sensor with the use of an inverse transfer function of a change in the outlet gas temperature with respect to a change in temperature of the DPF. Based on the estimated temperature, the ECU performs excessive temperature increase prevention control or regeneration control of the DPF. The transfer function is simply expressed with first-order lag and dead time. A time constant of the first-order lag and the dead time are set in accordance with an exhaust gas flow rate.Type: GrantFiled: October 2, 2003Date of Patent: December 26, 2006Assignee: Denso CorporationInventors: Tsukasa Kuboshima, Shinichiro Okugawa, Masumi Kinugawa, Kiyonori Sekiguchi
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Patent number: 7048891Abstract: A heat generation amount qr/r per unit flow amount of combustible substances supplied to a catalyst is estimated based on upstream and downstream temperature information and supplemental engine information. A deteriorated condition of the catalyst is detected based on a judgement whether or not the estimated heat generation amount is smaller than a predetermined judging value D.Type: GrantFiled: June 24, 2002Date of Patent: May 23, 2006Assignee: Denso CorporationInventors: Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Patent number: 6957275Abstract: The gateway apparatus has an IP address table that relates a plurality of apparatuses, each of which is one of components constructing a home network, to IP addresses respectively assigned to the apparatuses to store, a reception section that receives data with a destination indicative of one of the apparatuses constructing the home network, a recognition section that recognizes the apparatus with an IP address matching the IP address indicative of the destination contained in received data using the IP address table, and a distribution section that transmits the received data to the recognized apparatus.Type: GrantFiled: May 25, 2000Date of Patent: October 18, 2005Assignee: Panasonic Communications Co., Ltd.Inventor: Kiyonori Sekiguchi
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Patent number: 6951100Abstract: An electronic control unit (an ECU) detects an operating condition of an engine and quantity of particulate matters accumulated in a diesel particulate filter (a DPF) having an oxidation catalyst from a pressure difference across the DPF. The ECU operates temperature increasing means for regenerating the DPF based on the above detection results. During a low speed and light load operation, the ECU does not perform temperature increasing operation similar to an operation performed during a middle load operation. Instead, the ECU performs operation such as reduction of recirculated exhaust gas quantity in order to inhibit an increase in the quantity of the accumulated particulate matters. When the operating condition is changed afterward, the temperature increasing means is operated, so safe regeneration of the DPF is achieved.Type: GrantFiled: November 28, 2003Date of Patent: October 4, 2005Assignee: Denso CorporationInventors: Tsukasa Kuboshima, Masumi Kinugawa, Kiyonori Sekiguchi, Makoto Saito, Shigeto Yahata
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Patent number: 6928576Abstract: A backup gateway apparatus is provided in a home network, connected parallel to a gateway apparatus. The backup gateway apparatus detects when the gateway apparatus is malfunctioning. During the period when the gateway apparatus is malfunctioning, the backup gateway apparatus performs a partial backup function to maintain communication paths with outside lines, on behalf of the gateway apparatus.Type: GrantFiled: February 5, 2002Date of Patent: August 9, 2005Assignee: Panasonic Communications Co., Ltd.Inventor: Kiyonori Sekiguchi
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Patent number: 6870555Abstract: When a remote display device is connected to a home network, a home network control apparatus receives a request from the remote display device, shows a display for use in operating a device to be operated on the remote display device, and controls the device to be operated according to a desired operation input from the remote display device.Type: GrantFiled: January 22, 2001Date of Patent: March 22, 2005Assignee: Panasonic Communications Co., Ltd.Inventor: Kiyonori Sekiguchi
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Patent number: 6826903Abstract: An exhaust gas recirculation (EGR) system of an internal combustion engine has an EGR cooler in an EGR passage connecting an exhaust manifold with an intake manifold. The EGR cooler cools EGR gas recirculated through the EGR passage. Cooling performance detecting means included in an electronic control unit (ECU) determines that cooling performance of the EGR cooler is degraded when intake pressure measured by an intake pressure sensor is lower than a normal intake pressure by at least a predetermined value. When the degradation of the cooling performance is detected, cooling performance regeneration controlling means included in the ECU increases the temperature inside the EGR cooler by heating the exhaust gas to eliminate soot or unburned hydrocarbon by oxidization. Thus, the cooling performance of the EGR cooler is regenerated.Type: GrantFiled: May 19, 2003Date of Patent: December 7, 2004Assignee: Denso CorporationInventors: Shigeto Yahata, Makoto Saito, Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Publication number: 20040128987Abstract: An electronic control unit (an ECU) detects an operating condition of an engine and quantity of particulate matters accumulated in a diesel particulate filter (a DPF) having an oxidation catalyst from a pressure difference across the DPF. The ECU operates temperature increasing means for regenerating the DPF based on the above detection results. During a low speed and light load operation, the ECU does not perform temperature increasing operation similar to an operation performed during a middle load operation. Instead, the ECU performs operation such as reduction of recirculated exhaust gas quantity in order to inhibit an increase in the quantity of the accumulated particulate matters. When the operating condition is changed afterward, the temperature increasing means is operated, so safe regeneration of the DPF is achieved.Type: ApplicationFiled: November 28, 2003Publication date: July 8, 2004Applicant: DENSO CORPORATIONInventors: Tsukasa Kuboshima, Masumi Kinugawa, Kiyonori Sekiguchi, Makoto Saito, Shigeto Yahata
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Publication number: 20040123586Abstract: A diesel particulate filter (DPF) having an oxidation catalyst is disposed between exhaust pipes of an internal combustion engine. An exhaust gas temperature sensor senses outlet gas temperature of the DPF. An engine control unit (ECU) calculates estimated central temperature of the DPF from an output of the exhaust gas temperature sensor with the use of an inverse transfer function of a change in the outlet gas temperature with respect to a change in temperature of the DPF. Based on the estimated temperature, the ECU performs excessive temperature increase prevention control or regeneration control of the DPF. The transfer function is simply expressed with first-order lag and dead time. A time constant of the first-order lag and the dead time are set in accordance with an exhaust gas flow rate.Type: ApplicationFiled: October 2, 2003Publication date: July 1, 2004Applicant: DENSO CORPORATIONInventors: Tsukasa Kuboshima, Shinichiro Okugawa, Masumi Kinugawa, Kiyonori Sekiguchi
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Patent number: 6756904Abstract: The permeability of a DPF 21 mounted on a diesel engine 1 is evaluated by calculating the apparent passage area (A) based upon a difference in the pressure between the upstream and the downstream sides of the DPF 21 and upon other engine data, an alarm is given to a driver based on the results of evaluation, and the operation mode is changed over to regenerate the DPF 21. An abnormal increase in the passage area caused by breakage is accurately detected, and it does not happen that the PM is released into the open air for extended periods of time due to the breakage of the DPF 21. Further, without the need of dismantling the DPF 21, the DPF 21 can be reliably burned and regenerated without being undesirably overheated in every operation mode of the engine 1.Type: GrantFiled: June 18, 2002Date of Patent: June 29, 2004Assignee: Denso CorporationInventors: Masumi Kinugawa, Kiyonori Sekiguchi, Tatsuya Fujita
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Patent number: 6735941Abstract: An engine control unit of an exhaust gas purification system of an internal combustion engine measures a pressure difference between an upstream and a downstream of a diesel particulate filter (DPF) after heating the DPF at least to a predetermined temperature and maintaining the DPF at the temperature for a while. The DPF is disposed in an exhaust pipe of the engine. A soluble organic fraction included in particulate matters in exhaust gas can be eliminated at the predetermined temperature. The ECU calculates a quantity of the particulate matters trapped by the DPF from the measured pressure difference. Thus, the quantity of the trapped particulate matters is calculated precisely, independently of a composition of the particulate matters or a state of the soluble organic fraction.Type: GrantFiled: April 23, 2003Date of Patent: May 18, 2004Assignee: Denso CorporationInventors: Makoto Saito, Shigeto Yahata, Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Publication number: 20030213230Abstract: An exhaust gas recirculation (EGR) system of an internal combustion engine has an EGR cooler in an EGR passage connecting an exhaust manifold with an intake manifold. The EGR cooler cools EGR gas recirculated through the EGR passage. Cooling performance detecting means included in an electronic control unit (ECU) determines that cooling performance of the EGR cooler is degraded when intake pressure measured by an intake pressure sensor is lower than a normal intake pressure by at least a predetermined value. When the degradation of the cooling performance is detected, cooling performance regeneration controlling means included in the ECU increases the temperature inside the EGR cooler by heating the exhaust gas to eliminate soot or unburned hydrocarbon by oxidization. Thus, the cooling performance of the EGR cooler is regenerated.Type: ApplicationFiled: May 19, 2003Publication date: November 20, 2003Inventors: Shigeto Yahata, Makoto Saito, Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Publication number: 20030200746Abstract: An engine control unit of an exhaust gas purification system of an internal combustion engine measures a pressure difference between an upstream and a downstream of a diesel particulate filter (DPF) after heating the DPF at least to a predetermined temperature and maintaining the DPF at the temperature for a while. The DPF is disposed in an exhaust pipe of the engine. A soluble organic fraction included in particulate matters in exhaust gas can be eliminated at the predetermined temperature. The ECU calculates a quantity of the particulate matters trapped by the DPF from the measured pressure difference. Thus, the quantity of the trapped particulate matters is calculated precisely, independently of a composition of the particulate matters or a state of the soluble organic fraction.Type: ApplicationFiled: April 23, 2003Publication date: October 30, 2003Inventors: Makoto Saito, Shigeto Yahata, Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Patent number: 6571765Abstract: The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase intake air temperature in order to stabilize engine operation. When the engine is operated under a high engine load, the ECU activates the EGR cooler, delays a closing timing of an intake valve, and increases a boost pressure of a forced induction system. As a result, both of a compression end temperature and a maximum combustion temperature are decreased so that emissions of NOx and particulates are reduced.Type: GrantFiled: October 2, 2002Date of Patent: June 3, 2003Assignee: Denso CorporationInventors: Tsukasa Kuboshima, Kiyonori Sekiguchi, Masumi Kinugawa, Makoto Saito, Shigeto Yahata
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Publication number: 20030066510Abstract: The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase intake air temperature in order to stabilize engine operation. When the engine is operated under a high engine load, the ECU activates the EGR cooler, delays a closing timing of an intake valve, and increases a boost pressure of a forced induction system. As a result, both of a compression end temperature and a maximum combustion temperature are decreased so that emissions of NOx and particulates are reduced.Type: ApplicationFiled: October 2, 2002Publication date: April 10, 2003Inventors: Tsukasa Kuboshima, Kiyonori Sekiguchi, Masumi Kinugawa, Makoto Saito, Shigeto Yahata
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Publication number: 20020196153Abstract: The permeability of a DPF 21 mounted on a diesel engine 1 is evaluated by calculating the apparent passage area (A) based upon a difference in the pressure between the upstream and the downstream sides of the DPF 21 and upon other engine data, an alarm is given to a driver based on the results of evaluation, and the operation mode is changed over to regenerate the DPF 21. An abnormal increase in the passage area caused by breakage is accurately detected, and it does not happen that the PM is released into the open air for extended periods of time due to the breakage of the DPF 21. Further, without the need of dismantling the DPF 21, the DPF 21 can be reliably burned and regenerated without being undesirably overheated in every operation mode of the engine 1.Type: ApplicationFiled: June 18, 2002Publication date: December 26, 2002Inventors: Masumi Kinugawa, Kiyonori Sekiguchi, Tatsuya Fujita
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Publication number: 20020197721Abstract: A heat generation amount qr/r per unit flow amount of combustible substances supplied to a catalyst is estimated based on upstream and downstream temperature information and supplemental engine information. A deteriorated condition of the catalyst is detected based on a judgement whether or not the estimated heat generation amount is smaller than a predetermined judging value D.Type: ApplicationFiled: June 24, 2002Publication date: December 26, 2002Inventors: Masumi Kinugawa, Kiyonori Sekiguchi, Tsukasa Kuboshima
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Publication number: 20020178398Abstract: A backup gateway apparatus is provided in a home network, connected parallel to a gateway apparatus. The backup gateway apparatus detects when the gateway apparatus is malfunctioning. During the period when the gateway apparatus is malfunctioning, the backup gateway apparatus performs a partial backup function to maintain communication paths with outside lines, on behalf of the gateway apparatus.Type: ApplicationFiled: February 5, 2002Publication date: November 28, 2002Applicant: MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, Inc.Inventor: Kiyonori Sekiguchi
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Publication number: 20020156899Abstract: A home gateway apparatus that can control the power in each current carrying unit, and lower the power consumption is provided; by dividing the apparatus into a first system that has a minimum function to connect with the Internet, and a second system that has necessary functions to execute applications on the Ethernet®. Both the first and second systems are controlled individually, so that the power is turned on/off separately. Also, when the second system without the power is turned on, an Ethernet® connection controller is provided as an interface to avoid the interface connectivity problem, and an IP address is automatically obtained after turning on the power.Type: ApplicationFiled: March 27, 2002Publication date: October 24, 2002Applicant: MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC.Inventor: Kiyonori Sekiguchi