Patents by Inventor Yoshiaki Kodama
Yoshiaki Kodama 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: 20250050442Abstract: In order to attain an object of providing a technique to, upon detection of an abnormality in a welded part, provide notification of a factor of the detected abnormality, an abnormality diagnosis apparatus includes: an acquisition means (21) for acquiring time series data containing at least one of an electric current value and a voltage value at first welding; an abnormality determination means (22) for determining, with use of an abnormality determination model and based on the time series data acquired by the acquisition means, whether or not there is an abnormality in a welded part at the first welding; and an output means (23) for, if the abnormality determination means has determined that there is an abnormality, outputting the determination result and at least one of a factor of the abnormality and a remedial method for solving the abnormality.Type: ApplicationFiled: December 7, 2021Publication date: February 13, 2025Applicant: NEC CorporationInventors: Hiroki TAGATO, Yoshiaki SAKAE, Takashi KONASHI, Jun NISHIOKA, Yuji KOBAYASHI, Jun KODAMA, Etsuko ICHIHARA
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Patent number: 9376167Abstract: A inject gas control device that performs, for example, control reflecting variation in vessel velocity over time without adversely affecting the main engine is realized. That is, it is prevented that gas is drawn too much and thereby a gas supply or charged air rate becomes insufficient, efficiency of the main engine is decreased and exhaust gas is deteriorated, and analogous events occur because the gas supply or charged air rate is too much instead. There are provided a main engine 4010 acquiring propelling power for a vessel 1, and a turbocharger 4011 that is driven by exhaust gas from the main engine 4010 and blows pressurized gas to the main engine 4010. A part of the pressurized gas and/or exhaust gas is drawn from between the turbocharger 4011 and the main engine 4010 (5023, 5024 and 5025).Type: GrantFiled: March 31, 2009Date of Patent: June 28, 2016Assignee: NATIONAL MARITIME RESEARCH INSTITUTEInventors: Hideki Kawashima, Tetsugo Fukuda, Yoshiaki Kodama, Munehiko Hinatsu, Toshifumi Hori, Masahiko Makino, Kazuyoshi Harumi, Masashi Ohnawa, Haruya Takeshi, Tadanori Takimoto
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Publication number: 20110259440Abstract: A inject gas control device that performs, for example, control reflecting variation in vessel velocity over time without adversely affecting the main engine is realized. That is, it is prevented that gas is drawn too much and thereby a gas supply or charged air rate becomes insufficient, efficiency of the main engine is decreased and exhaust gas is deteriorated, and analogous events occur because the gas supply or charged air rate is too much instead. There are provided a main engine 4010 acquiring propelling power for a vessel 1, and a turbocharger 4011 that is driven by exhaust gas from the main engine 4010 and blows pressurized gas to the main engine 4010. A part of the pressurized gas and/or exhaust gas is drawn from between the turbocharger 4011 and the main engine 4010 (5023, 5024 and 5025).Type: ApplicationFiled: March 31, 2009Publication date: October 27, 2011Inventors: Hideki Kawashima, Tetsugo Fukuda, Yoshiaki Kodama, Munehiko Hinatsu, Toshifumi Hori, Masahiko Makino, Kazuyoshi Harumi, Masashi Ohnawa, Haruya Takeshi, Tadanori Takimoto
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Patent number: 5657625Abstract: An apparatus for controlling an internal combustion engine having an exhaust purifying catalytic device which absorbs nitrogen oxides contained in exhaust when the engine is in a lean-combustion mode and which deoxidizes the absorbed nitrogen oxides when the engine is in a rich-combustion mode. The engine control apparatus includes an electronic control unit for estimating the amount of purifying capability reducing substances other than nitrogen oxides, which decreases the nitrogen oxide adsorbing ability of the catalytic device, absorbed by the catalytic device, on the basis of the accumulated value of vehicle travel distance, fuel consumption of engine, or intake air amount. The control unit changes the operating condition of engine so that the exhaust gas temperature is increased when it is judged that the estimated adsorption amount has reached a predetermined adsorption amount.Type: GrantFiled: June 13, 1995Date of Patent: August 19, 1997Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Kazuo Koga, Kojiro Okada, Yoshiaki Danno, Kazuhide Togai, Osamu Hirako, Shogo Ohmori, Daisuke Sanbayashi, Yoshiaki Kodama
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Patent number: 5209206Abstract: An air-fuel ratio control system compares an air-fuel ratio indicated by air-fuel ratio information from an air-fuel ratio sensor and a target air-fuel ratio determined depending on operating conditions of a motor vehicle which incorporates the air-fuel ratio control system, for reliably determining at least a failure of the air-fuel ratio sensor. When a failure of the air-fuel ratio sensor is detected, an air-fuel ratio feedback control process is stopped or the air-fuel ratio sensor is disabled, preventing the air-fuel ratio from being corrected in error based on an output signal from the air-fuel ratio sensor which has failed. Therefore, the air-fuel ratio control system prevents problems such as poor exhaust gas purification, reduced drivability, and unstable engine idling from taking place.Type: GrantFiled: July 10, 1991Date of Patent: May 11, 1993Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Yoshiaki Danno, Tetsurou Ishida, Yoshiaki Kodama
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Patent number: 5119629Abstract: A method of and an apparatus for controlling the air fuel ratio of an internal combustion engine by which the air fuel ratio can be controlled so that the exhaust gas purifying efficiency of a catalytic converter for purifying exhaust gas of the engine may be maximum. In the apparatus, exhaust gas of the engine is first passed through a catalytic converter and then is introduced into an oxygen concentration sensor of the .lambda. type. When the air fuel ratio is compulsorily varied, the compulsorily varied condition of the air fuel ratio such as an average of variations of the air fuel ratio (average air fuel ratio) is corrected in accordance with an output of the oxygen concentration sensor thereby to control the air fuel ratio so that the purifying efficiency of the exhaust gas purifying catalytic converter may be maximum.Type: GrantFiled: June 28, 1989Date of Patent: June 9, 1992Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Tateo Kume, Reijiro Komagome, Katsuo Akishino, Yoshiaki Kodama, Michiyasu Yoshida, Toshio Yuminaka
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Patent number: 5056308Abstract: A feedback control system for an air-fuel ratio according to the present invention comprises a first oxygen sensor for detecting the oxygen concentration of exhaust gas flowing through a first exhaust pipe of an internal combustion engine, a second oxygen sensor for detecting the oxygen concentration of the exhaust gas passed through an exhaust gas disposer in a common exhaust passage which is connected with both first and second exhaust pipes of the engine, and an electronic control unit for calculating the amount of fuel supply to each cylinder of the engine in accordance with the oxygen concentration of the exhaust gas detected by means of the first oxygen sensor. The electronic control unit contains therein a correction circuit for correcting the amount of fuel supply to that cylinder of the engine which is associated with the second exhaust pipe, in accordance with the oxygen concentration of the exhaust gas detected by means of the second oxygen sensor.Type: GrantFiled: January 25, 1990Date of Patent: October 15, 1991Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Tateo Kume, Michiyasu Yoshida, Yoshiaki Kodama, Kazuo Koga
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Patent number: 5033440Abstract: An apparatus is provided for controlling the air/fuel ratio of an internal combustion engine. The apparatus includes a sensor disposed in an exhaust system for detecting components of exhaust gas, a device for compulsorily changing the air/fuel ratio, another device for setting a first target value which gives a target air/fuel ratio to be compared with each output from the sensor, and a further device for controlling the air/fuel ratio, which has been compulsorily changed by the air/fuel ratio changing device, on the basis of the result of a comparison between the output and the first target value, whereby the average air/fuel ratio may be controlled to the first target air/fuel ratio. The first target value setting device includes an element for modifying the first target value to a second target value, which gives a leaner air/fuel ratio, in a specific operation state of the engine.Type: GrantFiled: June 27, 1990Date of Patent: July 23, 1991Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Shiro Kumagai, Yoshiaki Kodama, Nobuyuki Yasuda, Katsuyuki Maeda
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Patent number: 4912926Abstract: An air/fuel ratio control system is provided for an internal combustion engine. The system includes first and second oxygen density sensors, an air/fuel ratio control device and a standard-value changing device. The first oxygen density sensor is arranged on an upstream side of a catalytic converter, while the second oxygen density sensor is provided either inside or on a downstream side of the catalytic converter. The air/fuel control device controls the air/fuel ratio of the internal combustion engine on the basis of results of comparison between a detection value from one of the first and second oxygen density sensors and a predetermined standard value. The standard-value changing device changes the standard value on the basis of outputs from the first and second oxygen density sensors.Type: GrantFiled: May 4, 1988Date of Patent: April 3, 1990Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Shiro Kumagai, Reijiro Komagome, Yoshiaki Kodama, Tateo Kume