Patents by Inventor Yuichi Kohara
Yuichi Kohara 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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Publication number: 20240123106Abstract: Space cleaning device includes: hypochlorous acid water generator; mixing bath storing a mixture of the hypochlorous acid water and water; hypochlorous acid water supply unit; water supply unit; water level sensor detecting a water level of the water mixture; humidifying purifier micronizing the water mixture and releases the water mixture micronized into air; and control unit controlling operations of hypochlorous acid water supply unit and water supply unit. Control unit is configured, after supplying the hypochlorous acid water and the water to fill mixing bath with the water mixture, controls an operation of hypochlorous acid water supply unit to supply a predetermined amount of the hypochlorous acid water to mixing bath once in every predetermined time period, and controls an operation of water supply unit to supply the water to mixing bath based on information related to the water level of the water mixture received from water level sensor.Type: ApplicationFiled: February 24, 2022Publication date: April 18, 2024Inventors: Yuki MIZUNO, Shinji YOSHIDA, Tomohiro HAYASHI, Takeshi KINOSHITA, Yuichi KANBARA, Mayumi SASAI, Hiroshi KOHARA
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Patent number: 8892337Abstract: An apparatus for detecting imbalance abnormality in an air-fuel ratio between cylinders in a multi-cylinder internal combustion engine according to the present invention increases a fuel injection quantity to a predetermined target cylinder to detect imbalance abnormality in an air-fuel ratio between cylinders at least based upon a rotation variation of the target cylinder after increasing the fuel injection quantity. The increase in the fuel injection quantity is carried out in the middle of performing the post-fuel-cut rich control. Since timing of the post-fuel cut rich control is used to increase the fuel injection quantity, the exhaust emission deterioration due to abnormality detection execution can be prevented as much as possible.Type: GrantFiled: March 28, 2011Date of Patent: November 18, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shota Kitano, Hitoshi Tanaka, Isao Nakajima, Yoshihisa Oda, Masashi Hakariya, Kiyotaka Kushihama, Kazuyuki Noda, Akihiro Katayama, Yuichi Kohara, Katsumi Adachi
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Patent number: 8620564Abstract: An abnormality detection apparatus for a multi-cylinder internal combustion engine changes a fuel injection quantity of a predetermined target cylinder to detect an abnormality of an internal combustion engine based on values of rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity. The abnormality detection apparatus corrects the values of the rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity based on at least one of the number of revolutions of the engine and an engine load at a corresponding detection time.Type: GrantFiled: May 25, 2012Date of Patent: December 31, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masashi Hakariya, Isao Nakajima, Yoshihisa Oda, Hitoshi Tanaka, Kiyotaka Kushihama, Shota Kitano, Kazuyuki Noda, Katsumi Adachi, Yuichi Kohara, Akihiro Katayama
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Publication number: 20120303248Abstract: An abnormality detection apparatus for a multi-cylinder internal combustion engine changes a fuel injection quantity of a predetermined target cylinder to detect an abnormality of an internal combustion engine based on values of rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity. The abnormality detection apparatus corrects the values of the rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity based on at least one of the number of revolutions of the engine and an engine load at a corresponding detection time.Type: ApplicationFiled: May 25, 2012Publication date: November 29, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masashi Hakariya, Isao Nakajima, Yoshihisa Oda, Hitoshi Tanaka, Kiyotaka Kushihama, Shota Kitano, Kazuyuki Noda, Katsumi Adachi, Yuichi Kohara, Akihiro Katayama
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Publication number: 20120253642Abstract: An apparatus for detecting imbalance abnormality in an air-fuel ratio between cylinders in a multi-cylinder internal combustion engine according to the present invention increases a fuel injection quantity to a predetermined target cylinder to detect imbalance abnormality in an air-fuel ratio between cylinders at least based upon a rotation variation of the target cylinder after increasing the fuel injection quantity. The increase in the fuel injection quantity is carried out in the middle of performing the post-fuel-cut rich control. Since timing of the post-fuel cut rich control is used to increase the fuel injection quantity, the exhaust emission deterioration due to abnormality detection execution can be prevented as much as possible.Type: ApplicationFiled: March 28, 2011Publication date: October 4, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shota Kitano, Hitoshi Tanaka, Isao Nakajima, Yoshihisa Oda, Masashi Hakariya, Kiyotaka Kushihama, Kazuyuki Noda, Akihiro Katayama, Yuichi Kohara, Katsumi Adachi
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Patent number: 7430853Abstract: To provide an apparatus for evaluating the deterioration condition of a catalyst of an internal combustion engine that can improve the accuracy of an evaluation of the deterioration condition of a catalyst and can suppress a worsening of emissions. The apparatus forcedly sets the air/fuel ratio upstream of a catalyst provided in an exhaust system of an internal combustion engine at a rich condition or a lean condition on the basis of a detected value of a sub O2 sensor downstream of the catalyst in the internal combustion engine and evaluates the deterioration condition of the catalyst.Type: GrantFiled: December 27, 2004Date of Patent: October 7, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yuichi Kohara, Takahiro Uchida
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Publication number: 20070062177Abstract: To provide an apparatus for evaluating the deterioration condition of a catalyst of an internal combustion engine that can improve the accuracy of an evaluation of the deterioration condition of a catalyst and can suppress a worsening of emissions. The apparatus forcedly sets the air/fuel ratio upstream of a catalyst provided in an exhaust system of an internal combustion engine at a rich condition or a lean condition on the basis of a detected value of a sub O2 sensor downstream of the catalyst in the internal combustion engine and evaluates the deterioration condition of the catalyst.Type: ApplicationFiled: December 27, 2004Publication date: March 22, 2007Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yuichi Kohara, Takahiro Uchida
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Patent number: 6698280Abstract: A failure test apparatus for a fuel-vapor purging system for adsorbing fuel vapor in a fuel tank into a canister and for purging fuel to an intake system of an internal combustion engine as needed. The purging system has at least one valve. A first test unit provides a differential pressure between the inside and the outside of the fuel-vapor purging system, measures the internal pressure with the fuel-vapor purging system in an airtight condition, and determines whether a leak exists in the fuel-vapor purging system from the behavior of the internal pressure. The test by the first test unit involves a differential-pressure forming process of creating a differential pressure between the inside and the outside of the fuel-vapor purging system, a sealing process of making the fuel-vapor purging system airtight when the differential pressure exists, and a differential-pressure releasing process for releasing the differential pressure.Type: GrantFiled: March 10, 2000Date of Patent: March 2, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Noriyuki Iden, Tokiji Ito, Yuichi Kohara, Shuichi Hanai, Shin Adachi
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Patent number: 6523398Abstract: An improved diagnosis apparatus for detecting leakage of a fuel vapor purge system that purges fuel vapor from a fuel tank to an intake passage of an engine. The apparatus includes a pressure sensor and a purge valve. The pressure sensor detects the pressure in the purge system. The purge valve connects the purge system with the intake passage for lowering the purge system pressure to a predetermined pressure level. After the purge system pressure is lowered to the predetermined level, the purge system is sealed. The apparatus measures the rate of pressure change immediately after the purge system is sealed. The apparatus subsequently measures the rate of pressure change when the purge system pressure reaches a second reference pressure value and computes the ratio of the rates. The apparatus diagnoses whether there is a leak in the purge system based on the ratio and the rate of pressure change at the second reference pressure value.Type: GrantFiled: November 30, 1999Date of Patent: February 25, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shuichi Hanai, Shin Adachi, Tokiji Itoh, Yuichi Kohara, Noriyuki Iden
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Patent number: 6487892Abstract: A test apparatus for a fuel vapor purge system that performs frequent tests. The testing apparatus detects leakage of fuel vapor from a system passage by sealing the system passage and monitoring changes in the pressure. After the test, the apparatus applies atmospheric pressure to the system passage. Therefore, the pressure in the system passage is quickly restored to atmospheric pressure.Type: GrantFiled: June 12, 2000Date of Patent: December 3, 2002Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tokiji Ito, Noriyuki Iden, Yuichi Kohara, Shuichi Hanai