Patents by Inventor Yuki Haba
Yuki Haba 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: 9856809Abstract: In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When a temperature of the exhaust purification catalyst falls in a first catalyst temperature region (I), a first NOX purification method is performed, while when a temperature of the exhaust purification catalyst falls in a second catalyst temperature region (II), a second NOX purification method is performed. When the temperature of the exhaust purification catalyst falls in a region (IIP) in the second catalyst temperature region close to the first catalyst temperature region, the temperature of the exhaust purification catalyst is made to increase to shift the region in which the temperature of the exhaust purification catalyst falls to the first catalyst temperature region to thereby switch the NOX purification method used from the second NOX purification method to the first NOX purification method.Type: GrantFiled: April 30, 2013Date of Patent: January 2, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshito Nogi, Yusuke Nozaki, Yuki Haba
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Patent number: 9631535Abstract: In an internal combustion engine, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged in an engine exhaust passage. When releasing the stored NOx from the exhaust purification catalyst (13), usually combustion gas of a rich air-fuel ratio is generated in the combustion chamber (2) to make the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) rich. When releasing the stored NOx from the exhaust purification catalyst (13) in case where the temperature of the exhaust purification catalyst (13) is low, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made rich by injecting hydrocarbons from the hydrocarbon feed valve (15).Type: GrantFiled: July 3, 2014Date of Patent: April 25, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Haba, Yusuke Nozaki, Kohei Yoshida
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Patent number: 9617893Abstract: In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which reduces NOX contained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOX removal method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and ST0 of the exhaust purification catalyst at which temperature an NOX removal method is switched from the second NOX removal method to the first NOX removal method, are made lower if the amount of NOX in the exhaust gas flowing into the exhaust purification catalyst increases.Type: GrantFiled: July 3, 2014Date of Patent: April 11, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Bisaiji, Kohei Yoshida, Yuki Haba, Yusuke Nozaki
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Patent number: 9617936Abstract: In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which injects hydrocarbons from the hydrocarbon feed valve within a predetermined range of period so that the reducing intermediate generated thereby reduces the NOX contained in the exhaust gas and a second NOX removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst a first target rich air-fuel ratio by a period which is longer than this predetermined range are used. When the NOX removal method is switched from the second NOX removal method to the first NOX removal method, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made a second target air-fuel ratio which is smaller than the first target rich air-fuel ratio.Type: GrantFiled: June 27, 2014Date of Patent: April 11, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Haba, Kohei Yoshida, Yusuke Nozaki
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Patent number: 9611811Abstract: The influenced of condensed water on an EGR device is alleviated. A device (100) that controls a cooling system including adjusting means for being able to adjust a circulation amount of coolant in a first flow passage, including an engine cooling flow passage, an EGR cooling flow passage and a radiator flow passage, and a second flow passage, including the engine cooling flow passage, the EGR cooling flow passage and a bypass flow passage and not including the radiator flow passage, includes: measuring means for measuring a temperature of the coolant; limiting means for limiting circulation of the coolant at starting an internal combustion engine; and control means for circulating the coolant preferentially through the second flow passage via control over the adjusting means based on the measured temperature in a period in which circulation of the coolant is limited.Type: GrantFiled: December 19, 2011Date of Patent: April 4, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Nobumoto Ohashi, Taro Aoyama, Naoya Okamoto, Yoshio Yamashita, Yuki Haba, Hajime Takagawa, Koki Uno, Naoki Takeuchi, Masashi Shinoda, Teruhiko Miyake, Koji Nakayama
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Patent number: 9441515Abstract: A hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX purification method which injects hydrocarbons from the hydrocarbon feed valve by a predetermined period to thereby remove NOX which is contained in the exhaust gas and a second NOX purification method which makes the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst rich to make the exhaust purification catalyst release the stored NOX when the NOX which is stored in the exhaust purification catalyst exceeds a first allowable value are selectively used. Hydrocarbons are injected from the hydrocarbon feed valve by the predetermined period, and when the NOX which is stored in the exhaust purification catalyst exceeds a second allowable value which is smaller than the first allowable value, the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst is made rich.Type: GrantFiled: February 5, 2013Date of Patent: September 13, 2016Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yuki Haba, Kohei Yoshida
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Publication number: 20160201538Abstract: In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which reduces NOX contained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOX removal method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and ST0 of the exhaust purification catalyst at which temperature an NOX removal method is switched from the second NOX removal method to the first NOX removal method, are made lower if the amount of NOX in the exhaust gas flowing into the exhaust purification catalyst increases.Type: ApplicationFiled: July 3, 2014Publication date: July 14, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki BISAIJI, Kohei YOSHIDA, Yuki HABA, Yusuke NOZAKI
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Publication number: 20160195032Abstract: In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which injects hydrocarbons from the hydrocarbon feed valve within a predetermined range of period so that the reducing intermediate generated thereby reduces the NOX contained in the exhaust gas and a second NOX removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst a first target rich air-fuel ratio by a period which is longer than this predetermined range are used. When the NOX removal method is switched from the second NOX removal method to the first NOX removal method, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made a second target air-fuel ratio which is smaller than the first target rich air-fuel ratio.Type: ApplicationFiled: June 27, 2014Publication date: July 7, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki HABA, Kohei YOSHIDA, Yusuke NOZAKI
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Publication number: 20160186627Abstract: In an internal combustion engine, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged in an engine exhaust passage. When releasing the stored NOx from the exhaust purification catalyst (13), usually combustion gas of a rich air-fuel ratio is generated in the combustion chamber (2) to make the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) rich. When releasing the stored NOx from the exhaust purification catalyst (13) in case where the temperature of the exhaust purification catalyst (13) is low, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made rich by injecting hydrocarbons from the hydrocarbon feed valve (15).Type: ApplicationFiled: July 3, 2014Publication date: June 30, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki HABA, Yusuke NOZAKI, Kohei YOSHIDA
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Publication number: 20160108839Abstract: In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When a temperature of the exhaust purification catalyst falls in a first catalyst temperature region (I), a first NOX purification method is performed, while when a temperature of the exhaust purification catalyst falls in a second catalyst temperature region (II), a second NOX purification method is performed. When the temperature of the exhaust purification catalyst falls in a region (IIP) in the second catalyst temperature region close to the first catalyst temperature region, the temperature of the exhaust purification catalyst is made to increase to shift the region in which the temperature of the exhaust purification catalyst falls to the first catalyst temperature region to thereby switch the NOX purification method used from the second NOX purification method to the first NOX purification method.Type: ApplicationFiled: April 30, 2013Publication date: April 21, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshito NOGI, Yusuke NOZAKI, Yuki HABA
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Publication number: 20150322834Abstract: A hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX purification method which injects hydrocarbons from the hydrocarbon feed valve by a predetermined period to thereby remove NOX which is contained in the exhaust gas and a second NOX purification method which makes the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst rich to make the exhaust purification catalyst release the stored NOX when the NOX which is stored in the exhaust purification catalyst exceeds a first allowable value are selectively used. Hydrocarbons are injected from the hydrocarbon feed valve by the predetermined period, and when the NOX which is stored in the exhaust purification catalyst exceeds a second allowable value which is smaller than the first allowable value, the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst is made rich.Type: ApplicationFiled: February 5, 2013Publication date: November 12, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki HABA, Kohei YOSHIDA
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Publication number: 20150027387Abstract: The influenced of condensed water on an EGR device is alleviated. A device (100) that controls a cooling system including adjusting means for being able to adjust a circulation amount of coolant in a first flow passage, including an engine cooling flow passage, an EGR cooling flow passage and a radiator flow passage, and a second flow passage, including the engine cooling flow passage, the EGR cooling flow passage and a bypass flow passage and not including the radiator flow passage, includes: measuring means for measuring a temperature of the coolant; limiting means for limiting circulation of the coolant at starting an internal combustion engine; and control means for circulating the coolant preferentially through the second flow passage via control over the adjusting means based on the Measured temperature in a period in which circulation of the coolant is limited.Type: ApplicationFiled: December 19, 2011Publication date: January 29, 2015Inventors: Nobumoto Ohashi, Taro Aoyama, Naoya Okamoto, Yoshio Yamashita, Yuki Haba, Hajime Takagawa, Koki Uno, Naoki Takeuchi, Masashi Shinoda, Teruhiko Miyake, Koji Nakayama
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Patent number: 8752774Abstract: A tubular outer needle, slidably housed in a body, can communicate nozzle and suck chambers R1, R2 with each other and shut them from each other, and defines nozzle and suck chambers R1, R3. A rod-like inner needle, coaxially slidably housed in the outer needle, has a tip end portion movable into the suck chamber R2 at its lowermost position. In the range of small inner lift amount, an annular clearance is formed between an inner peripheral surface of an inner side wall defines the suck chamber R2 and an outer peripheral surface of an outer side wall of the needle tip end portion. Outer and inner lift amounts are regulated such that when fuel injection is started, the outer and inner lift amounts simultaneously increase from zero while when fuel injection is terminated, the inner lift amount returns to zero after the outer lift amount returns zero.Type: GrantFiled: August 23, 2012Date of Patent: June 17, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yuki Haba
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Publication number: 20130037632Abstract: A tubular outer needle, slidably housed in a body, can communicate nozzle and suck chambers R1, R2 with each other and shut them from each other, and defines nozzle and suck chambers R1, R3. A rod-like inner needle, coaxially slidably housed in the outer needle, has a tip end portion movable into the suck chamber R2 at its lowermost position. In the range of small inner lift amount, an annular clearance is formed between an inner peripheral surface of an inner side wall defines the suck chamber R2 and an outer peripheral surface of an outer side wall of the needle tip end portion. Outer and inner lift amounts are regulated such that when fuel injection is started, the outer and inner lift amounts simultaneously increase from zero while when fuel injection is terminated, the inner lift amount returns to zero after the outer lift amount returns zero.Type: ApplicationFiled: August 23, 2012Publication date: February 14, 2013Inventor: Yuki HABA
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Publication number: 20100200679Abstract: A tubular outer needle 42 is slidably housed in a body 41 such that the outer needle can communicate nozzle and suck chambers R1 and R2 with each other and shut them from each other, and defines the nozzle and suck chambers R1 and R3. A rod-like inner needle 43 is coaxially slidably housed in the outer needle 42, and the tip end portion thereof moves into the suck chamber R2 at its lowermost position. In the range of the small inner lift amount, an annular clearance is formed between an inner peripheral surface of an inner side wall defining the suck chamber R2 and an outer peripheral surface of an outer side wall of the tip end portion of the inner needle 43. Outer and inner lift amounts are regulated such that when the fuel injection is started, the outer and inner lift amounts simultaneously increase from zero while when the fuel injection is terminated, the inner lift amount returns to zero after the outer lift amount returns zero.Type: ApplicationFiled: September 11, 2008Publication date: August 12, 2010Inventor: Yuki Haba