Patents by Inventor Shinichiro Mizoguchi
Shinichiro Mizoguchi 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: 10138842Abstract: Apparatus for utilizing heat wasted from an engine includes: a Rankine cycle (31); a transmission mechanism that couples an output shaft of an expansion device (37) to a rotary shaft of an engine via an electromagnetic clutch (32) that can be engaged and disengaged; a passage (65) through which refrigerant exiting a heat exchanger (36) flows so as to bypass the expansion device (37); and a bypass valve (66) interposed in the passage. To stop the expansion device (37), the electromagnetic clutch (32) is switched from an engaged state to a disengaged state after switching the bypass valve (66) from a closed state to an open state. If the bypass valve (66) becomes stuck in the closed state, expansion device front-rear differential pressure limiting processing in which a front-rear differential pressure of the expansion device is limited while maintaining the electromagnetic clutch (32) in the engaged state is performed.Type: GrantFiled: May 14, 2015Date of Patent: November 27, 2018Assignee: SANDEN HOLDINGS CORPORATIONInventors: Shinichiro Mizoguchi, Hiroyuki Nagai, Tomonori Haraguchi
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Patent number: 9988945Abstract: Apparatus for utilizing heat wasted from an engine includes first pressure detecting means (73) and first temperature detecting means (81) for detecting a pressure and a temperature in a refrigerant passage extending from a condenser (38) to a refrigerant pump (32), second pressure detecting means (72) and second temperature detecting means (82) for detecting a pressure and a temperature in a refrigerant passage extending from a heat exchanger (36) to an expansion device (37), and control means (71) responsive to these four detecting means when operating a Rankine cycle (31). Means (71) is for diagnosing whether or not an electromagnetic clutch (35) is stuck responsive to either the first pressure detecting means (73) and the first temperature detecting means (81), or the second pressure detecting means (72) and the second temperature detecting means (82).Type: GrantFiled: May 14, 2015Date of Patent: June 5, 2018Assignee: SANDEN HOLDINGS CORPORATIONInventors: Shinichiro Mizoguchi, Hiroyuki Nagai, Tomonori Haraguchi
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Publication number: 20170107861Abstract: Apparatus for utilizing heat wasted from an engine includes first pressure detecting means (73) and first temperature detecting means (81) for detecting a pressure and a temperature in a refrigerant passage extending from a condenser (38) to a refrigerant pump (32), second pressure detecting means (72) and second temperature detecting means (82) for detecting a pressure and a temperature in a refrigerant passage extending from a heat exchanger (36) to an expansion device (37), and control means (71) responsive to these four detecting means when operating a Rankine cycle (31). Means (71) is for diagnosing whether or not an electromagnetic clutch (35) is stuck responsive to either the first pressure detecting means (73) and the first temperature detecting means (81), or the second pressure detecting means (72) and the second temperature detecting means (82).Type: ApplicationFiled: May 14, 2015Publication date: April 20, 2017Applicant: Sanden Holdings CorporationInventors: Shinichiro MIZOGUCHI, Hiroyuki NAGAI, Tomonori HARAGUCHI
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Publication number: 20170082061Abstract: Apparatus for utilizing heat wasted from an engine includes: a Rankine cycle (31); a transmission mechanism that couples an output shaft of an expansion device (37) to a rotary shaft of an engine via an electromagnetic clutch (32) that can be engaged and disengaged; a passage (65) through which refrigerant exiting a heat exchanger (36) flows so as to bypass the expansion device (37); and a bypass valve (66) interposed in the passage. To stop the expansion device (37), the electromagnetic clutch (32) is switched from an engaged state to a disengaged state after switching the bypass valve (66) from a closed state to an open state. If the bypass valve (66) becomes stuck in the closed state, expansion device front-rear differential pressure limiting processing in which a front-rear differential pressure of the expansion device is limited while maintaining the electromagnetic clutch (32) in the engaged state is performed.Type: ApplicationFiled: May 14, 2015Publication date: March 23, 2017Applicant: Sanden Holdings CorporationInventors: Shinichiro MIZOGUCHI, Hiroyuki NAGAI, Tomonori HARAGUCHI
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Patent number: 9562444Abstract: An engine-waste-heat utilization device includes a Rankine cycle which includes a heat exchanger through which cooling water coming out from an engine flows to recover waste-heat of the engine to refrigerant, an expander which generates power using the refrigerant coming out from the heat exchanger, a condenser which condenses the refrigerant coming out from the expander and a refrigerant pump which supplies the refrigerant coming out from the condenser to the heat exchanger, and a cooling water passage in which the cooling water having a higher temperature flows when the Rankine cycle is operated than when the Rankine cycle is not operated.Type: GrantFiled: August 6, 2012Date of Patent: February 7, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Hiroyuki Nagai, Shinichiro Mizoguchi, Takayuki Ishikawa
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Patent number: 9523290Abstract: A Rankine cycle includes a refrigerant pump, a heat exchanger, an expander and a condenser. The Rankine cycle further includes a clutch provided in a power transmission path extending from an engine to the refrigerant pump. Prior to the operation of the Rankine cycle and during the deceleration of the vehicle, the clutch is fastened and the refrigerant pump is driven with use of the vehicle inertia force.Type: GrantFiled: July 24, 2012Date of Patent: December 20, 2016Assignee: SANDEN HOLDINGS CORPORATIONInventors: Shinichiro Mizoguchi, Satoshi Ogihara, Hirofumi Wada
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Patent number: 9441503Abstract: A waste heat utilization apparatus is provided with a Rankine cycle and a power transmission mechanism that transmits power regenerated by an expander to an engine. The power transmission mechanism includes an expander clutch that interrupts or permits the transmission of the power from the expander to the engine. The expander includes a rotational speed sensor that detects a rotational speed of the expander. An increase in friction of the expander is detected on the basis of an increase in the rotational speed of the expander detected by the rotational speed sensor when the expander clutch is disconnected.Type: GrantFiled: August 14, 2012Date of Patent: September 13, 2016Assignee: SANDEN HOLDINGS CORPORATIONInventors: Takayuki Ishikawa, Shinichiro Mizoguchi, Hiroyuki Nagai, Riyako Iwahashi, Satoshi Ogihara, Tomonori Haraguchi
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Patent number: 9328632Abstract: A Rankine cycle includes an waste-heat recovery device that is configured to exchange heat between cooling water coming out from an engine and exhaust gas exhausted from the engine, a heat exchanger including an evaporator through which the cooling water coming out from the engine flows to recover waste-heat of the engine to refrigerant, and a superheater through which the cooling water coming out from the waste-heat recovery device flows to recover the waste-heat of the engine to the refrigerant, an expander that is configured to generate power using the refrigerant coming out from the heat exchanger, a condenser that is configured to condense the refrigerant coming out from the expander, and a refrigerant pump that is configured to supply the refrigerant coming out from the condenser to the heat exchanger by being driven by the expander. The cooling water coming out from the superheater is returned to the engine after being joined with the cooling water coming out from the evaporator.Type: GrantFiled: August 14, 2012Date of Patent: May 3, 2016Assignee: NISSAN MOTOR CO., LTD.Inventors: Hiroyuki Nagai, Tomohiko Saitou, Takayuki Ishikawa, Shinichiro Mizoguchi
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Patent number: 9291074Abstract: An engine-waste-heat utilization device includes a Rankine cycle with a heat exchanger that is configured to recover engine-waste-heat to refrigerant, an expander that is configured to generate power using the refrigerant coming out from the heat exchanger, a condenser that is configured to condense the refrigerant coming out from the expander and a refrigerant pump that is configured to supply the refrigerant coming out from the condenser to the heat exchanger by being driven by the expander, a power transmission mechanism (crank pulley, pump pulley, belt) that is configured to transmit surplus power to the engine when the expander has spare power even if the refrigerant pump is driven, a clutch that is configured to connect and disconnecting power transmission by the power transmission mechanism, and a case provided near a high-temperature part of the engine such that a shaft of the expander and that of the refrigerant pump are coaxially arranged, the clutch, the refrigerant pump and the expander are integrType: GrantFiled: August 6, 2012Date of Patent: March 22, 2016Assignees: NISSAN MOTOR CO., LTD., SANDEN CORPORATIONInventors: Hiroyuki Nagai, Takayuki Ishikawa, Shinichiro Mizoguchi, Riyako Iwahashi, Shinji Nakamura
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Publication number: 20150047351Abstract: A waste heat utilization apparatus is provided with a Rankine cycle and a power transmission mechanism that transmits power regenerated by an expander to an engine. The power transmission mechanism includes an expander clutch that interrupts or permits The transmission of the power from to expander to the engine. The expander includes a rotational speed sensor that detects a rotational speed of the expander. An increase in friction of the expander is detected on the basis of an increase in the rotational speed of the expander detected by the rotational speed sensor when the expander clutch is disconnected.Type: ApplicationFiled: August 14, 2012Publication date: February 19, 2015Inventors: Takayuki Ishikawa, Shinichiro Mizoguchi, Hiroyuki Nagai, Riyako Iwahashi, Satoshi Ogihara, Tomonori Haraguchi
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Publication number: 20140250886Abstract: The Rankine cycle (31) includes a refrigerant pump (32), a heat exchanger (36), an expander (37), and a condenser (38). The Rankine cycle (31) shares the condenser (38) and refrigerant with a refrigerant cycle of an air-conditioner. A refrigerant passage connecting to an outlet of the condenser (38) branches at a refrigeration cycle branch point (45) to connect to the refrigerant pump (32) and an evaporator (55). In the case of operating the Rankine cycle, without a request to operate the air-conditioner, the compressor (52) in the refrigeration cycle is driven.Type: ApplicationFiled: July 20, 2012Publication date: September 11, 2014Applicant: SANDEN CORPORATIONInventors: Shinichiro Mizoguchi, Takayuki Ishikawa, Hiroyuki Nagai, Riyako Iwahashi, Satoshi Ogihara, Tomonori Haraguchi
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Publication number: 20140250889Abstract: A Rankine cycle includes a refrigerant pump, a heat exchanger, an expander and a condenser. The Rankine cycle further includes a clutch provided in a power transmission path extending from an engine to the refrigerant pump. Prior to the operation of the Rankine cycle and during the deceleration of the vehicle, the clutch is fastened and the refrigerant pump is driven with use of the vehicle inertia force.Type: ApplicationFiled: July 24, 2012Publication date: September 11, 2014Inventors: Shinichiro Mizoguchi, Satoshi Ogihara, Hirofumi Wada
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Publication number: 20140208754Abstract: A Rankine cycle includes an waste-heat recovery device that is configured to exchange heat between cooling water coming out from an engine and exhaust gas exhausted from the engine, a heat exchanger including an evaporator through which the cooling water coming out from the engine flows to recover waste-heat of the engine to refrigerant, and a superheater through which the cooling water coming out from the waste-heat recovery device flows to recover the waste-heat of the engine to the refrigerant, an expander that is configured to generate power using the refrigerant coming out from the heat exchanger, a condenser that is configured to condense the refrigerant coming out from the expander, and a refrigerant pump that is configured to supply the refrigerant coming out from the condenser to the heat exchanger by being driven by the expander. The cooling water coming out from the superheater is returned to the engine after being joined with the cooling water coming out from the evaporator.Type: ApplicationFiled: August 14, 2012Publication date: July 31, 2014Applicant: NISSAN MOTOR CO., LTD.Inventors: Hiroyuki Nagai, Tomohiko Saitou, Takayuki Ishikawa, Shinichiro Mizoguchi
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Publication number: 20140174087Abstract: A Rankine cycle system includes a refrigerant pump which is mounted on an engine and is configured to feed refrigerant, a heat exchanger which is mounted on the engine and is configured to recover exhaust heat of the engine to the refrigerant, an expander which is mounted on the engine and is configured to convert the exhaust heat recovered to the refrigerant into power by expanding the refrigerant whose temperature has been increased by the heat exchanger, and a condenser which is mounted on a vehicle body and is configured to condense the refrigerant expanded by the expander. The expander and the condenser, and the condenser and the refrigerant pump are connected by flexible pipes having higher flexibility than other pipes.Type: ApplicationFiled: September 6, 2012Publication date: June 26, 2014Applicant: NISSAN MOTOR CO., LTD.Inventors: Shinichiro Mizoguchi, Takayuki Ishikawa, Hiroyuki Nagai, Riyako Iwahashi, Satoshi Ogihara
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Publication number: 20140165567Abstract: An engine-waste-heat utilization device includes a Rankine cycle with a heat exchanger that is configured to recover engine-waste-heat to refrigerant, an expander that is configured to generate power using the refrigerant coming out from the heat exchanger, a condenser that is configured to condense the refrigerant coming out from the expander and a refrigerant pump that is configured to supply the refrigerant coming out from the condenser to the heat exchanger by being driven by the expander, a power transmission mechanism (crank pulley, pump pulley, belt) that is configured to transmit surplus power to the engine when the expander has spare power even if the refrigerant pump is driven, a clutch that is configured to connect and disconnecting power transmission by the power transmission mechanism, and a case provided near a high-temperature part of the engine such that a shaft of the expander and that of the refrigerant pump are coaxially arranged, the clutch, the refrigerant pump and the expander are integrType: ApplicationFiled: August 6, 2012Publication date: June 19, 2014Applicants: SANDEN CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Hiroyuki Nagai, Takayuki Ishikawa, Shinichiro Mizoguchi, Riyako Iwahashi, Shinji Nakamura
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Publication number: 20140165562Abstract: An engine-waste-heat utilization device includes a Rankine cycle which includes a heat exchanger through which cooling water coming out from an engine flows to recover waste-heat of the engine to refrigerant, an expander which generates power using the refrigerant coming out from the heat exchanger, a condenser which condenses the refrigerant coming out from the expander and a refrigerant pump which supplies the refrigerant coming out from the condenser to the heat exchanger, and a cooling water passage in which the cooling water having a higher temperature flows when the Rankine cycle is operated than when the Rankine cycle is not operated.Type: ApplicationFiled: August 6, 2012Publication date: June 19, 2014Applicant: NISSAN MOTOR CO., LTD.Inventors: Hiroyuki Nagai, Shinichiro Mizoguchi, Takayuki Ishikawa