Patents by Inventor Kenichi Maeda
Kenichi Maeda 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: 5388560Abstract: A misfire-detecting system for an internal combustion engine compares detected sparking voltage with a first predetermined comparative level and a second predetermined comparative level lower than the first predetermined comparative level. Whether a misfire has occurred in the engine is determined based upon a logical relationship between results of the comparisons. As a result, a misfire can be detected accurately even when dielectric breakdown of the mixture occurs while a misfire has occurred.Type: GrantFiled: April 26, 1993Date of Patent: February 14, 1995Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Takashi Hisaki, Yuichi Shimasaki, Shigeki Baba, Masaki Kanehiro, Takuji Ishioka, Shigeru Maruyama, Kazuhito Kakimoto, Masataka Chikamatsu, Shukoh Terata, Kenichi Maeda
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Patent number: 5375462Abstract: A misfire detecting system for an internal combustion engine, including an intake pipe internal pressure detecting device for detecting an internal pressure of an intake pipe of the internal combustion engine, and a misfire detection inhibiting device for inhibiting the detection of misfire when the internal pressure of the intake pipe detected by the intake pipe internal pressure detecting device is lower than an intake pipe internal pressure in a no-load condition.Type: GrantFiled: May 17, 1993Date of Patent: December 27, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shigetaka Kuroda, Kazutomo Sawamura, Shukoh Terata, Masaki Kanehiro, Takuji Ishioka, Kenichi Maeda
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Patent number: 5373732Abstract: A combustion state-detecting system for an internal combustion engine calculates a first average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one stroke of a cylinder, and a second average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one cycle of all strokes of the cylinder. The system calculates a difference between the first average speed and the second average speed, and determines based on the difference whether or not the combustion state of the engine is abnormal.Type: GrantFiled: November 10, 1993Date of Patent: December 20, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shigetaka Kuroda, Kazutomo Sawamura, Kenichi Maeda, Yuichi Shimasaki
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Patent number: 5365905Abstract: A misfire-detecting system for an internal combustion engine in which a value of sparking voltage is detected, which is generated across a spare plug when high voltage is generated by an ignition device in response to generation of an ignition command signal. When a time period over which the detected value of sparking voltage exceeds a predetermined reference voltage value exceeds a predetermined time period value, the system determines that a misfire has occurred in the engine. A recharging command signal is generated for applying high voltage to the spark plug, after generation of the ignition command signal. As a result, a misfire can be accurately detected.Type: GrantFiled: March 5, 1993Date of Patent: November 22, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masaki Kanehiro, Yuichi Shimasaki, Takuji Ishioka, Shigeru Maruyama, Shigeki Baba, Takashi Hisaki, Kenichi Maeda, Kazutomo Sawamura, Jiro Takagi, Shukoh Terata
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Patent number: 5353769Abstract: A fuel supply control system which controls an amount of fuel supplied to an internal combustion engine. An ECU detects a value related to an amount of combustion ions generated within cylinders. The detected value is compared with a predetermined value, and the amount of fuel supplied to the engine is corrected based upon the comparison result, when the engine is in a transient operating condition, such as acceleration and deceleration, whereby the responsiveness of the air-fuel ratio feedback control is enhanced to improve drivability and exhaust emission characteristics.Type: GrantFiled: April 23, 1993Date of Patent: October 11, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kenichi Maeda, Yuichi Shimasaki, Eitetsu Akiyama, Takashi Hisaki, Shigeru Maruyama, Masaki Kanehiro, Takuji Ishioka, Kazutomo Sawamura
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Patent number: 5349299Abstract: A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. A differentiating circuit differentiates the detected value of the sparking voltage. A misfire-determining circuit compares the differential value of the sparking voltage with a predetermined value, and determines, based upon a result of the comparison, whether a misfire has occurred in the engine.Type: GrantFiled: December 11, 1992Date of Patent: September 20, 1994Assignee: Honda Giken Kogyo Kabushiki KaishiInventors: Masaki Kanehiro, Yuichi Shimasaki, Takuji Ishioka, Shigeki Baba, Takashi Hisaki, Shigeru Maruyama, Masataka Chikamatsu, Shukoh Terata, Kenichi Maeda, Kazuhito Kakimoto
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Patent number: 5327867Abstract: A misfire-detecting system for an internal combustion engine carries out self-diagnosis of the system. In the system, sparking voltage generated across a spark plug of a cylinder of the engine is detected, and the detected sparking voltage is compared with a first predetermined reference voltage value, and a time period is measured over which the detected sparking voltage exceeds the first predetermined reference voltage value. It is determined that a misfire occurred in the engine when the measured time period exceeds a predetermined time period value. It is determined whether the engine is in self-sustaining operation. When it is determined that the engine is in self-sustaining operation, it is determined whether the misfire-detecting system is abnormal. It is determined that the misfire-detecting system is abnormal when the detected sparking voltage is lower than a second reference voltage value.Type: GrantFiled: March 3, 1993Date of Patent: July 12, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Takashi Hisaki, Yuichi Shimasaki, Shigeki Baba, Masaki Kanehiro, Takuji Ishioka, Shigeru Maruyama, Kazuhito Kakimoto, Masataka Chikamatsu, Shukoh Terata, Kenichi Maeda
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Patent number: 5325664Abstract: A catalyst deterioration-determining system determines deterioration of a catalyst arranged in the exhaust passage of an internal combustion engine. An ECU is responsive to an output from an O.sub.2 sensor arranged upstream of the catalyst or outputs from O.sub.2 sensors arranged upstream and downstream of the catalyst for controlling the air-fuel ratio of a mixture supplied to the engine by means of an air-fuel ratio correction value (first air-fuel ratio control). When the engine is in a predetermined operating condition, the system effects changeover from the first air-fuel ratio control to a second air-fuel ratio control which is responsive to the output from the downstream O.sub.2 sensor for controlling the air-fuel ratio of the mixture by means of the air-fuel ratio correction value.Type: GrantFiled: October 16, 1992Date of Patent: July 5, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasunari Seki, Toshihiko Sato, Katuhiro Kumagai, Hiroshi Maruyama, Yoichi Iwata, Tsuyoshi Takizawa, Kenichi Maeda, Shigetaka Kuroda, Masataka Chikamatsu, Shukoh Terata, Kazutomo Sawamura, Hajime Uto, Takuya Aoki, Makoto Kobayashi
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Patent number: 5322045Abstract: A misfire-detecting system for an internal combustion engine detects values of operating parameters of the engine, determines ignition timing of the engine, based upon detected values of operating parameters of the engine to generate an ignition command signal indicative of the determined ignition timing, generates high voltage for causing generation of sparking voltage across a spark plug for discharging the spark plug, according to the ignition command signal, detects a value of the sparking voltage generated across the spark plug when the high voltage is generated, compares the detected value of the sparking voltage with a predetermined reference value, and determines whether or not a misfire has occurred in the engine, based upon results of the comparison. It is determined that the system is abnormal, when it is determined that no misfire has occurred while fuel supply to the engine is being interrupted.Type: GrantFiled: December 22, 1992Date of Patent: June 21, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Takashi Hisaki, Yuichi Shimasaki, Shigeki Baba, Masaki Kanehiro, Shigeru Maruyama, Takuji Ishioka, Kazuhito Kakimoto, Masataka Chikamatsu, Kenichi Maeda, Shukoh Terata
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Patent number: 5287836Abstract: A control system for an internal combustion engine determines ignition timing of the engine and generates an ignition command signal to generate high voltage for discharging a spark plug provided for each cylinder of the engine. The control system detects sparking voltage generated across the spark plug when the high voltage is generated. The control system measures a duration over which the sparking voltage across the spark plug exceeds a predetermined reference value, after generation of the ignition command signal. According to a first aspect of the invention, the control system detects combustion roughness based on the duration measured. According to a second aspect of the invention, the control means detects an air-fuel ratio of an air-fuel mixture supplied to the engine, based on the duration measured.Type: GrantFiled: December 17, 1992Date of Patent: February 22, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yuichi Shimasaki, Masaki Kanehiro, Takuji Ishioka, Shigeki Baba, Takashi Hisaki, Shigeru Maruyama, Masataka Chikamatsu, Shukoh Terata, Kenichi Maeda, Kazuhito Kakimoto
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Patent number: 5264749Abstract: An electric motor having a cylindrical frame with a thickness less than that of conventional electric motors. A tubular inner yoke is inserted in the cylindrical frame and in combination therewith serves as a magnetic path. The total thickness of the cylindrical frame and the inner yoke serves as a magnetic path substantially the same as that of a conventional electric motor frame. The inner yoke and thinner frame construction of the present invention reduces the total weight of the electric motor as compared with conventional electric motors. Additionally, the inner yoke has a plurality of protrusions for positioning the permanent magnets of the electric motor both axially and circumferentially thereon.Type: GrantFiled: December 12, 1991Date of Patent: November 23, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kenichi Maeda, Youji Maki, Norio Umezawa
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Patent number: 5241937Abstract: A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. The detected value of the sparking voltage is compared with a first predetermined value. A degree to which the detected value of the sparking voltage exceeds the first predetermined value is measured. The measured degree is compared with a second predetermined value. It is determined based upon results of the latter comparison whether or not a misfire occurred in the engine. According to a first aspect of the invention, the second predetermined reference value is set based upon detected values of operating parameters of the engine. According to a second aspect of the invention, the determination of occurrence of a misfire is inhibited when the engine is in a predetermined operating condition.Type: GrantFiled: December 8, 1992Date of Patent: September 7, 1993Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masaki Kanehiro, Yuichi Shimasaki, Takuji Ishioka, Shigeki Baba, Takashi Hisaki, Shigeru Maruyama, Masataka Chikamatsu, Shukoh Terata, Kazuhito Kakimoto, Kenichi Maeda, Kazutomo Sawamura, Eitetsu Akiyama
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Patent number: 5034885Abstract: A copy-back type cache memory device using a delayed wait method capable of completing a data-write process in one process cycle. The device includes single word memory means for storing the single word of the selected data in a data memory means when an access for a data-write is made, the single word being located at the address in the data memory means corresponding to the processor address; and copy-back memory means for restoring the superseded data along with other data together with which the superseded data forms a block, so that the block can be reorganized in its original state before the data-write process takes place.Type: GrantFiled: March 10, 1989Date of Patent: July 23, 1991Assignee: Kabushiki Kaisha ToshibaInventors: Tsukasa Matoba, Takeshi Aikawa, Mitsuyoshi Okamura, Kenichi Maeda
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Patent number: 4926491Abstract: A pattern recognition device is arranged to have learning of a reference pattern vector carried out in a recognition unit by making use of the pause periods in the recognition processing, without particularly providing a learning section for learning the reference pattern vector. Namely, a part or the entirety of the arithmetic processing unit where the recognition result is obtained in the recognition unit by collating the input pattern with the recognition dictionary, can be utilized as the learning portion of the reference pattern vector. In concrete terms, the operation of multiplication-accumulation (inner product) which represents the main operation in the recognition processing and the learning processing, can be carried out by means of similar processes of handling.Type: GrantFiled: June 6, 1988Date of Patent: May 15, 1990Assignee: Kabushiki Kaisha ToshibaInventors: Kenichi Maeda, Hiroyuki Tsuboi, Yoichi Takebayashi
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Patent number: 4665578Abstract: A streamlined box girder type suspension bridge comprises a plurality of towers for supporting the cables, and the center main span and side spans comprising streamlined box girders suspended by a plurality of hangers from the cables. An additional mass of an appropriate weight comprising the material which would not directly contribute to the strength of the box girder is formed as a core at the predetermined portion of the box girder in order to suppress the bending-torsional flutter arising from the streamlined shape of the box girder, and the core extends over the complete span of the bridge symmetrically and with respect to the longitudinal axis thereof.Type: GrantFiled: March 31, 1986Date of Patent: May 19, 1987Assignee: Kawada Kogyo K.K.Inventors: Tadaki Kawada, Kenichi Maeda
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Patent number: 4651289Abstract: In a pattern recognition system for speech or print, a first memory stores predetermined reference vectors. A second memory stores subsequently-determined reference vectors subsequent to misrecognition when a new speaker or font is inputted, whereby only the deformations (differences) from a predetermined category of vectors are stored.Type: GrantFiled: January 24, 1983Date of Patent: March 17, 1987Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Kenichi Maeda, Tsuneo Nitta
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Patent number: 4590712Abstract: A vertical spindle duplex head for a grinder includes an annular pressure wheel and a receiver wheel arranged to rotate and revolve workpieces between the annular surfaces of the pressure wheel and the receiver wheel and a grindstone for one end portion of the workpieces driven in the opposite directions of rotation of the pressure wheel and receiver wheel and at their different rotational ratios. The workpieces rotate and revolve between these wheels, thereby grinding their end face by means of a grindstone arranged around the external periphery of a rotary carrier.Type: GrantFiled: October 4, 1985Date of Patent: May 27, 1986Assignees: Koyo Seike Company Limited, Koyo Machine Industries CompanyInventors: Yasuo Sugiyama, Masaomi So, Ichiro Hamaguchi, Kenichi Maeda
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Patent number: 4503557Abstract: The invention is directed to a pattern recognition apparatus and method by which an unknown input pattern is divided into a plurality of sub-area patterns which are matched with a plurality of standard partial characteristic patterns to form an input pattern similarity matrix F. The input pattern similarity matrix is then matched with a plurality of reference similarity matrices .PHI.l of standard reference patterns, whereby the unknown pattern is recognized as the one of the L standard reference patterns which gives the best matching.Type: GrantFiled: April 8, 1982Date of Patent: March 5, 1985Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventor: Kenichi Maeda
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Patent number: D264558Type: GrantFiled: December 18, 1979Date of Patent: May 25, 1982Assignee: The Nippon Aluminium Mfg. Co., Ltd.Inventor: Kenichi Maeda
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Patent number: D264638Type: GrantFiled: April 21, 1980Date of Patent: May 25, 1982Assignee: The Nippon Aluminium Mfg. Co., Ltd.Inventor: Kenichi Maeda