Patents by Inventor Akira Shimoyama
Akira Shimoyama 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: 11746200Abstract: A fiber-reinforced resin molding material is obtained by impregnating a chopped fiber bundle with a matrix resin, has a layered structure including three or more layers in a thickness direction thereof, and satisfies the relationships Lao>Lam and Wao>Wam, where Lao and Wao represent the number average fiber length and the number average fiber bundle width, respectively, of the chopped fiber bundle in the outermost layer thereof, and Lam and Wam represent the number average fiber length and the number average fiber bundle width, respectively, of the chopped fiber bundle in a middle layer thereof.Type: GrantFiled: September 24, 2019Date of Patent: September 5, 2023Assignee: Toray Industries, Inc.Inventors: Yasukazu Ono, Takafumi Hashimoto, Akira Shimoyama, Tetsuya Motohashi
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Publication number: 20220049061Abstract: A fiber-reinforced resin molding material is obtained by impregnating a chopped fiber bundle with a matrix resin, has a layered structure including three or more layers in a thickness direction thereof, and satisfies the relationships Lao>Lam and Wao>Wam, where Lao and Wao represent the number average fiber length and the number average fiber bundle width, respectively, of the chopped fiber bundle in the outermost layer thereof, and Lam and Wam represent the number average fiber length and the number average fiber bundle width, respectively, of the chopped fiber bundle in a middle layer thereof.Type: ApplicationFiled: September 24, 2019Publication date: February 17, 2022Inventors: Yasukazu Ono, Takafumi Hashimoto, Akira Shimoyama, Tetsuya Motohashi
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Patent number: 8056536Abstract: An ignition device for an internal combustion engine including: an exciter coil that generates an AC voltage having a positive half wave and first and second negative half waves generated before and after the positive half wave with rotation of the internal combustion engine; and an ignition control portion that controls an ignition position of the engine using a microprocessor to which a power supply voltage is supplied from a power supply circuit that converts the voltage having the negative half waves generated by the exciter coil to a DC voltage, wherein the ignition control portion is comprised so as to cause a timer to start a counting operation at the start of the operation of the microprocessor, regard a measurement value of the timer as time between generation of the first negative half wave and generation of the second negative half wave to arithmetically operate counting data for measuring the ignition position based on rotational speed information of the engine obtained from the time, and immediatType: GrantFiled: March 17, 2008Date of Patent: November 15, 2011Assignee: Kokusan Denki Co., Ltd.Inventors: Kiyotada Nakauchi, Akira Shimoyama, Yasukazu Hatano, Masayuki Sugiyama
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Publication number: 20100095932Abstract: An ignition device for an internal combustion engine including: an exciter coil that generates an AC voltage having a positive half wave and first and second negative half waves generated before and after the positive half wave with rotation of the internal combustion engine; and an ignition control portion that controls an ignition position of the engine using a microprocessor to which a power supply voltage is supplied from a power supply circuit that converts the voltage having the negative half waves generated by the exciter coil to a DC voltage, wherein the ignition control portion is comprised so as to cause a timer to start a counting operation at the start of the operation of the microprocessor, regard a measurement value of the timer as time between generation of the first negative half wave and generation of the second negative half wave to arithmetically operate counting data for measuring the ignition position based on rotational speed information of the engine obtained from the time, and immediatType: ApplicationFiled: March 17, 2008Publication date: April 22, 2010Applicant: Kokusan Denki Co. LTdInventors: Kiyotada Nakauchi, Akira Shimoyama, Yasukazu Hatano, Masayuki Sugiyama
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Patent number: 7603982Abstract: A capacitor discharge ignition device in which a coil unit including an ignition coil and an exciter coil wound around a common core, and an ignition unit including a circuit board and components of an ignition circuit mounted to the circuit board are housed in a case and molded with resin poured into the case, wherein the ignition coil and the exciter coil are placed axially with a spacing therebetween and a space is formed between the coils, the circuit board of the ignition unit is placed on a lateral side of the coil unit, and terminals for connecting the ignition coil and the exciter coil to the circuit board are all connected to the circuit board through the space between the ignition coil and the exciter coil.Type: GrantFiled: November 14, 2008Date of Patent: October 20, 2009Assignee: Kokusan Denki Co., Ltd.Inventors: Masayuki Sugiyama, Yasukazu Hatano, Akira Shimoyama
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Publication number: 20090126686Abstract: A capacitor discharge ignition device in which a coil unit including an ignition coil and an exciter coil wound around a common core, and an ignition unit including a circuit board and components of an ignition circuit mounted to the circuit board are housed in a case and molded with resin poured into the case, wherein the ignition coil and the exciter coil are placed axially with a spacing therebetween and a space is formed between the coils, the circuit board of the ignition unit is placed on a lateral side of the coil unit, and terminals for connecting the ignition coil and the exciter coil to the circuit board are all connected to the circuit board through the space between the ignition coil and the exciter coil.Type: ApplicationFiled: November 14, 2008Publication date: May 21, 2009Applicant: KOKUSAN DENKI CO., LTD.Inventors: Masayuki Sugiyama, Yasukazu Hatano, Akira Shimoyama
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Patent number: 7472688Abstract: A capacitor discharge ignition device for an internal combustion engine including: idling time advance angle control permission condition determination means for determining whether an idling time advance angle control permission condition is met that is a condition for permitting control to advance an ignition position during idling immediately after completion of the start of the engine in order to stabilize idling immediately after completion of the start of the internal combustion engine; and idling time advance angle control means for advancing the ignition position during idling immediately after completion of the start of the internal combustion engine when it is determined that the idling time advance angle control permission condition is met.Type: GrantFiled: June 6, 2007Date of Patent: January 6, 2009Assignee: Kokusan Denki Co., Ltd.Inventors: Kiyotada Nakauchi, Masayuki Sugiyama, Yasukazu Hatano, Akira Shimoyama
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Publication number: 20070277782Abstract: A capacitor discharge ignition device for an internal combustion engine including: idling time advance angle control permission condition determination means for determining whether an idling time advance angle control permission condition is met that is a condition for permitting control to advance an ignition position during idling immediately after completion of the start of the engine in order to stabilize idling immediately after completion of the start of the internal combustion engine; and idling time advance angle control means for advancing the ignition position during idling immediately after completion of the start of the internal combustion engine when it is determined that the idling time advance angle control permission condition is met.Type: ApplicationFiled: June 6, 2007Publication date: December 6, 2007Applicant: KOKUSAN DENKI CO., LTD.Inventors: Kiyotada Nakauchi, Masayuki Sugiyama, Yasukazu Hatano, Akira Shimoyama
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Patent number: 7171948Abstract: A capacitor-discharge-type ignition device for an internal combustion engine, comprising: an exciter coil that generates an AC voltage having a positive half-wave voltage and first and second negative half-wave voltages present before and after the positive half-wave voltage synchronously with rotation of the engine; ignition-position detection time data calculating means that arithmetically operates as ignition position detection time data, the time period that is required for the engine to rotate from the generating position of the second negative half-wave voltage to an ignition position suitable in starting period, at the rotational speed of the engine that is obtained from time period from generation of the first negative half-wave voltage to the generation of the second negative half-wave voltage, and from an angle between the generating position of the first negative half-wave voltage and that of the second negative half-wave voltage, wherein a crank angle position when the measurement of the arithmetiType: GrantFiled: January 30, 2006Date of Patent: February 6, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Akira Shimoyama, Kiyotada Nakauchi, Yasukazu Hatano, Masayuki Sugiyama
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Publication number: 20060169249Abstract: A capacitor-discharge-type ignition device for an internal combustion engine, comprising: an exciter coil that generates an AC voltage having a positive half-wave voltage and first and second negative half-wave voltages present before and after the positive half-wave voltage synchronously with rotation of the engine; ignition-position detection time data calculating means that arithmetically operates as ignition position detection time data, the time period that is required for the engine to rotate from the generating position of the second negative half-wave voltage to an ignition position suitable in starting period, at the rotational speed of the engine that is obtained from time period from generation of the first negative half-wave voltage to the generation of the second negative half-wave voltage, and from an angle between the generating position of the first negative half-wave voltage and that of the second negative half-wave voltage, wherein a crank angle position when the measurement of the arithmetiType: ApplicationFiled: January 30, 2006Publication date: August 3, 2006Applicant: Kokusan Denki Co. Ltd.Inventors: Akira Shimoyama, Kiyotada Nakauchi, Yasukazu Hatano, Masayuki Sugiyama
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Patent number: 6997167Abstract: A fuel injection control system for an engine comprising: accelerating/decelerating state detection means which samples an intake pipe pressure of the engine at each sample timing which comes every time a very short time is passed from a timing at which a signal generator generates a signal at a reference crank angle position of the engine, and detects whether the engine is in an accelerating state or in a decelerating state when a difference between the intake pipe pressure sampled at each sample timing and an intake pipe pressure sampled at the corresponding sample timing one combustion cycle before exceeds a set value; and injector drive means which decides a fuel amount to be injected from an injector so as to be suitable for the detected state when the accelerating state or decelerating state is detected and drives the injector so as to inject the decided amount of fuel.Type: GrantFiled: December 1, 2004Date of Patent: February 14, 2006Assignee: Kokusan Denki Co., Ltd.Inventors: Yuichi Kitagawa, Kazuyoshi Kishibata, Hiroyasu Sato, Akira Shimoyama
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Patent number: 6935168Abstract: A section where a piston of a four cycle internal combustion engine makes one rotation from a position reaching a top dead point to a next top dead point is taken as a determination object section, and an output of a pressure sensor for detecting an intake air pressure of the internal combustion engine is sampled. A maximum value of an inclination of a change in the intake air pressure in the process of increasing an absolute value of the intake air pressure sampled in each determination object section is found and, when the maximum value of the inclination of the change in the intake air pressure found in each determination object section is larger than the maximum value of the inclination of the change in the intake air pressure found in the determination object section which is one section before each determination object section, each determination object section is determined to be a section where the intake stroke and the compression stroke are performed.Type: GrantFiled: May 14, 2002Date of Patent: August 30, 2005Assignee: Kokusan Denki Co., Ltd.Inventor: Akira Shimoyama
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Publication number: 20050133011Abstract: A fuel injection control system for an engine comprising: accelerating/decelerating state detection means which samples an intake pipe pressure of the engine at each sample timing which comes every time a very short time is passed from a timing at which a signal generator generates a signal at a reference crank angle position of the engine, and detects whether the engine is in an accelerating state or in a decelerating state when a difference between the intake pipe pressure sampled at each sample timing and an intake pipe pressure sampled at the corresponding sample timing one combustion cycle before exceeds a set value; and injector drive means which decides a fuel amount to be injected from an injector so as to be suitable for the detected state when the accelerating state or decelerating state is detected and drives the injector so as to inject the decided amount of fuel.Type: ApplicationFiled: December 1, 2004Publication date: June 23, 2005Applicant: Kokusan Denki Co., Ltd.Inventors: Yuichi Kitagawa, Kazuyoshi Kishibata, Hiroyasu Sato, Akira Shimoyama
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Patent number: 6814050Abstract: A fuel cut control device that stops supply of fuel to an internal combustion engine during deceleration of the internal combustion engine having a throttle valve for each cylinder, which detects a maximum value of an intake pipe pressure during one combustion cycle of the internal combustion engine, starts fuel cut control when it is detected that the detected maximum value of the intake pipe pressure becomes less than a set fuel cut start determination value, and stop the fuel cut control when it is detected that the detected maximum value of the intake pipe pressure exceeds a fuel supply restart determination value set higher than the fuel cut start determination value to restart the supply of the fuel to the internal combustion engine.Type: GrantFiled: November 12, 2003Date of Patent: November 9, 2004Assignee: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Yuichi Kitagawa, Hiroyasu Sato, Akira Shimoyama
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Publication number: 20040094120Abstract: A fuel cut control device that stops supply of fuel to an internal combustion engine during deceleration of the internal combustion engine having a throttle valve for each cylinder, which detects a maximum value of an intake pipe pressure during one combustion cycle of the internal combustion engine, starts fuel cut control when it is detected that the detected maximum value of the intake pipe pressure becomes less than a set fuel cut start determination value, and stop the fuel cut control when it is detected that the detected maximum value of the intake pipe pressure exceeds a fuel supply restart determination value set higher than the fuel cut start determination value to restart the supply of the fuel to the internal combustion engine.Type: ApplicationFiled: November 12, 2003Publication date: May 20, 2004Inventors: Kazuyoshi Kishibata, Yuichi Kitagawa, Hiroyasu Sato, Akira Shimoyama
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Patent number: 6639374Abstract: A method of controlling a DC servomotor for driving a driven member coupled by a wire to an operation member of a valve, wherein, at the start of a control, the motor is driven first to rotate the operation shaft of the valve to a limit position after the motor stops, a driving current of the motor is gradually reduced to return slowly the driven member by a tension of the wire, and a position of the driven member when the driving current of the motor becomes zero is stored as a final stop position, thereafter, a rotational range of the driven member is limited to the range between these final stop positions when the position of the driven member is controlled to coincide with a target position.Type: GrantFiled: March 4, 2002Date of Patent: October 28, 2003Assignee: Kokusan Denki Co., Ltd.Inventor: Akira Shimoyama
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Patent number: 6598469Abstract: An operating state detecting method for an internal combustion engine for detecting whether the engine is in an accelerating state and/or whether it is in a decelerating state without detecting the opening degree of a throttle valve is to be provided. A plurality of rotational angle positions of a crankshaft of an internal combustion engine are specified as sampling positions, and pressures within an air intake pipe sampled at each sampling position are stored. Every time a pressure within the air intake pipe is sampled at each sampling position, the newly sampled pressure within the air intake pipe is compared with a previous pressure within the air intake pipe sampled at the same sampling position one combustion cycle before, and whether the engine is in an accelerating state and/or whether it is in a decelerating state is determined from the result of comparison.Type: GrantFiled: February 8, 2002Date of Patent: July 29, 2003Assignee: Kokusan Denki Co., Ltd.Inventors: Akira Shimoyama, Kazuyoshi Kishibata
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Publication number: 20020170346Abstract: A section where a piston of a four cycle internal combustion engine makes one rotation from a position reaching a top dead point to a next top dead point is taken as a determination object section, and an output of a pressure sensor for detecting an intake air pressure of the internal combustion engine is sampled. A maximum value of an inclination of a change in the intake air pressure in the process of increasing an absolute value of the intake air pressure sampled in each determination object section is found and, when the maximum value of the inclination of the change in the intake air pressure found in each determination object section is larger than the maximum value of the inclination of the change in the intake air pressure found in the determination object section which is one section before each determination object section, each determination object section is determined to be a section where the intake stroke and the compression stroke are performed.Type: ApplicationFiled: May 14, 2002Publication date: November 21, 2002Inventor: Akira Shimoyama
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Publication number: 20020125847Abstract: A method of controlling a DC servomotor for driving a driven member coupled by a wire to an operation member of a valve, wherein, at the start of a control, the motor is driven first to rotate the operation shaft of the valve to a limit position after the motor stops, a driving current of the motor is gradually reduced to return slowly the driven member by a tension of the wire, and a position of the driven member when the driving current of the motor becomes zero is stored as a final stop position, thereafter, a rotational range of the driven member is limited to the range between these final stop positions when the position of the driven member is controlled to coincide with a target position.Type: ApplicationFiled: March 4, 2002Publication date: September 12, 2002Inventor: Akira Shimoyama
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Publication number: 20020112536Abstract: An operating state detecting method for an internal combustion engine for detecting whether the engine is in an accelerating state and/or whether it is in a decelerating state without detecting the opening degree of a throttle valve is to be provided. A plurality of rotational angle positions of a crankshaft of an internal combustion engine are specified as sampling positions, and pressures within an air intake pipe sampled at each sampling position are stored. Every time a pressure within the air intake pipe is sampled at each sampling position, the newly sampled pressure within the air intake pipe is compared with a previous pressure within the air intake pipe sampled at the same sampling position one combustion cycle before, and whether the engine is in an accelerating state and/or whether it is in a decelerating state is determined from the result of comparison.Type: ApplicationFiled: February 8, 2002Publication date: August 22, 2002Inventors: Akira Shimoyama, Kazuyoshi Kishibata