Patents by Inventor Tatsuo Kobayashi
Tatsuo Kobayashi 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: 6026781Abstract: A fuel injection control device in a cylinder direct injection engine which switches between premixed combustion by intake stroke injection and stratified combustion by compression stroke injection in accordance with a change of an engine speed or a required load, where an unpleasant torque shock occurring when the injection mode is changed and the combustion state is changed despite the vehicle operating in the driving pattern such as driving on an upward slope or downward slope is prevented by maintaining the same injection mode while the vehicle continues to operate in the same driving state and where stratified combustion by the compression stroke injection is carried out when the vehicle is in driving on a downward slope, but is augmented by intake stroke injection when the vehicle sharply accelerates and the torque becomes insufficient.Type: GrantFiled: October 6, 1998Date of Patent: February 22, 2000Assignees: Nippon Soken, Inc., Toyoda Jidosha Kabushika KaishaInventors: Nobuo Imatake, Shingo Morishima, Kimitaka Saito, Tokio Kohama, Tatsuo Kobayashi
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Patent number: 5677088Abstract: An improved nickel electrode plate for an alkaline storage battery in which a paste-like active material is filled. The plate has a porous structure comprising one non-woven fabric or two or more such fabrics made of metal fibers each having a diameter of 10 .mu.m or more and a length of at least 10 mm and a framework made of nickel wires each thicker than the metal fiber to support the non-woven fabric or fabrics. The metal-fiber non-woven fabric or fabrics and nickel wires are sintered together to form the porous structure.Type: GrantFiled: November 30, 1995Date of Patent: October 14, 1997Assignee: Bridgestone Metalpha CorporationInventor: Tatsuo Kobayashi
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Patent number: 5664665Abstract: A shock sensor capable of detecting a shock in a number of directions includes a reed switch, which is fixed inside a body and has a reed contact part which is magnetically changed from a first to a second state by way of a magnet, which is fixed inside the body at a specified distance from the reed switch. A shield member, having a sufficiently large area, prevents the magnet force of the magnet from affecting the reed contact part when the shield member is in its regular position. A resilient member, in a normal state, keeps the shield member at its regular position between the reed contact part and a magnet, at which the reed contact part is kept in the first state. When a shock is applied to the shock sensor, the resilient member allows the shield member to move to a position where the reed contact part changes over to the second state.In a second embodiment, the magnet is movably held in the main casing at a specified distance from the reed switch.Type: GrantFiled: March 19, 1996Date of Patent: September 9, 1997Assignee: Oki Electric Industry Co. Ltd.Inventors: Tatsuo Kobayashi, Kiyotaka Nakamura, Hisaharu Matsueda, Kayoko Makiki, Isamu Hamazaki, Kazuya Watanabe
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Patent number: 5581060Abstract: A shock sensor capable of detecting a shock in a number of directions includes a reed switch, which is fixed inside a body and has a reed contact part with is magnetically changed from a first to a second state by way of a magnet, which is fixed inside the body at a specified distance from the reed switch. A shield member, having a sufficiently large area, prevents the magnetic force of the magnet from affecting the reed contact part when the shield member is in its regular position. A resilient member, in a normal state, keeps the shield member at its regular position between the reed contact part and the magnet, at which the reed contact part is kept in the first state. When a shock is applied to the shock sensor, the resilient member allows the shield member to move to a position where the reed contact part changes over to the second state.In a second embodiment, the magnet is movably held in the main casing at a specified distance from the reed switch.Type: GrantFiled: June 7, 1994Date of Patent: December 3, 1996Assignee: Oki Electric Industry Co. Ltd.Inventors: Tatsuo Kobayashi, Kiyotaka Nakamura, Hisaharu Matsueda, Kayoko Makiki, Isamu Hamazaki, Kazuya Watanabe
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Patent number: 5271362Abstract: A two-stroke engine comprising a spark plug arranged at the center of the inner wall of the cylinder head, and a fuel injector arranged on the periphery of the inner wall of the cylinder head. A depression extending from the point beneath the spark plug to the point beneath the tip portion of the fuel injector is formed on the top face of the piston. When the engine is operating under a light load, fuel is injected by the fuel injector only once toward the depression, and conversely, when the engine is operating under an intermediate load, fuel is injected twice. Namely, a first injection is carried out when the piston is at a lower position, and a second injection is carried out when the piston is at a higher position, to thus direct fuel toward the depression.Type: GrantFiled: June 21, 1991Date of Patent: December 21, 1993Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuo Kobayashi, Norihiko Nakamura, Kenichi Nomura, Hiroshi Nomura, Hiroaki Nihei, Eishi Ohno
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Patent number: 5259348Abstract: An internal combustion engine comprising a spark plug arranged at the center of the inner wall of the cylinder head, and a fuel injector arranged on the periphery of the inner wall of the cylinder head. A depression is formed on the top face of the piston. This depression is defined by a flat bottom wall and a pair of extended straight side walls which diverge toward the fuel injector side. Fuel is obliquely injected on the flat bottom wall of the depression from the fuel injector.Type: GrantFiled: May 20, 1992Date of Patent: November 9, 1993Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuo Kobayashi, Norihiko Nakamura, Kenichi Nomura, Hiroaki Nihei, Koichi Nakata
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Patent number: 5140958Abstract: A two-stroke engine including a pair of intake valves. A masking wall is provided for each intake valve to mask the valve opening between the valve seat and the peripheral portion of the intake valve, which is located on the exhaust valve side, for the entire time for which the intake valve is open. The exhaust valves open earlier than the intake valves, and the exhaust valves and the intake valves are closed at substantially the same time.Type: GrantFiled: June 14, 1991Date of Patent: August 25, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuo Kobayashi, Norihiko Nakamura, Kenichi Nomura, Hiroshi Nomura, Hiroaki Nihei
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Patent number: 5127379Abstract: An internal combustion engine comprising a spark plug arranged at the center of the inner wall of the cylinder head, and a fuel injector arranged on the periphery of the inner wall of the cylinder head. A depression extending from the position beneath the spark plug to the position beneath the tip portion of the fuel injector is formed on the top face of the piston, and fuel is injected toward the depression. When the engine is operating under a heavy load, the fuel moving along the axis of injection impinges upon the concaved inner wall of the depression at substantially a right angle. When the engine is operating under a light load, the injection time is retarded, and at this time, the fuel moving along the axis of injection impinges upon the concaved inner wall of the depression at an acute angle.Type: GrantFiled: May 28, 1991Date of Patent: July 7, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuo Kobayashi, Norihiko Nakamura, Kenichi Nomura, Hiroshi Nomura, Hiroshi Nihei
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Patent number: 5115776Abstract: An internal combustion engine comprising a piston having a top face with a depression formed therein, and a first fuel injector and a second fuel injector arranged on the inner wall of the cylinder head. Fuel is injected from the first fuel injector when the position of the piston is high, and fuel is injected from the second fuel injector when the position of the piston is low. The axes of fuel injection of both fuel injectors are determined such that fuel injected from the fuel injectors is directed to the central portion of the depression.Type: GrantFiled: July 29, 1991Date of Patent: May 26, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Eishi Ohno, Tatsuo Kobayashi
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Patent number: 5115774Abstract: An internal combustion engine having an air blast valve which injects fuel together with pressurized air in the form of a conical shaped spray of fuel. A depression is formed on the top face of the piston, and the conical shaped spray of fuel is injected from the air blast valve toward the depression. The longitudinal width of the depression in the moving direction of the spray of fuel is larger than the transverse width of the depression in the direction perpendicular to the moving direction of the spray of fuel, and the opposing side walls of the depression, which define the transverse width of the depression, are positioned slightly outward from the side face of the conical shaped spray of fuel.Type: GrantFiled: July 26, 1991Date of Patent: May 26, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Nomura, Norihiko Nakamura, Kenichi Nomura, Tatsuo Kobayashi, Hiroaki Nihei
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Patent number: 4968749Abstract: A resin composition comprising (a) a polyphenylene ether resin, (b) a non-crystalline or low-crystalline polyamide resin, (c) a crystalline polyamide resin and, if desired, (d) a polar compound or a low-molecular diene polymer or the component (d) and (e) a rubbery polymer or an alkenyl aromatic compound/conjugated diene copolymer or a hydrogeneration product thereof. The composition is excellent in both impact strength, particularly on a plane part of a plate-molded article, and dimensional stability.Type: GrantFiled: March 29, 1989Date of Patent: November 6, 1990Assignee: Mitsubishi Petrochemical Company, Ltd.Inventors: Nobuhiro Shibuya, Kiyoji Takagi, Satoru Hattori, Tatsuo Kobayashi, Hironari Sano
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Patent number: 4840147Abstract: A two-stroke engine having an intake valve and an exhaust valve which are arranged on the cylinder head. A masking wall is formed on the inner wall of the cylinder head to mask the valve opening between the valve seat and the peripheral portion of the intake valve, which is located on the exhaust valve side, for the entire time for which the intake valve is open.Type: GrantFiled: July 5, 1988Date of Patent: June 20, 1989Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshio Tanahashi, Norihiko Nakamura, Hiroshi Noguchi, Kenichi Nomura, Toyokazu Baika, Masanobu Kanamaru, Tatsuo Kobayashi, Hideo Nagaosa, Kazuhiro Ito, Toshio Ito, Kouichi Nakae
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Patent number: 4523566Abstract: In a knocking control apparatus for a spark-ignition internal combustion engine, the full-wave rectified output from a vibration sensor is integrated and summed with a constant offset voltage to provide a variable reference signal. The integration time constant is selected to be no more than approximately five times the rise time from inception to maximum value of each knocking occurrence, such that the reference value can remain above the envelope of the background vibrations of the engine, which have a much longer rise time than do the knocking vibrations, without being set too high to detect knocking in a cylinder remote from the location of the vibration sensor. The rectified output of the vibration sensor is directly compared with the reference signal to generate a knocking control pulse each time the alternating sensor output exceeds the reference value.Type: GrantFiled: March 17, 1983Date of Patent: June 18, 1985Assignee: Toyota Jidosha Kabushiki KaishaInventor: Tatsuo Kobayashi
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Patent number: 4513717Abstract: An ignition control device of an engine comprising a knocking sensor. When a knocking does not occur, the ignition timing is maintained at an optimum ignition timing determined by the engine speed and the level of vacuum produced in the intake passage of the engine. When a knocking occurs, the ignition timing is retarded to an optimum ignition timing determined by the engine speed and the level of vacuum which is produced in the intake passage when the engine is operating in a wide open throttle.Type: GrantFiled: March 9, 1983Date of Patent: April 30, 1985Assignee: Toyota Jidosha Kabushiki KaishaInventor: Tatsuo Kobayashi
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Patent number: 4481924Abstract: An engine knock detecting apparatus for sensing knocking occurring in an internal combustion engine. The engine knock detecting apparatus has a vibration sensor for sensing vibration having a vibration component caused by the knocking taking place in the engine and outputting an electric signal corresponding to the vibration. A feed back loop is formed by a first mean level detection circuit which determines and outputs the mean value of the electric signal derived from the vibration sensor, and a gain controller which controls the gain of an amplifier in accordance with the first mean level signal produced by the first mean level detection circuit, such that the amplified signal derived from the amplifier takes a level equal to or above a predetermined level. The amplified signal derived from the amplifier is compared by a comparator with a reference signal which is delivered through a second mean level detection circuit and a reference signal generator.Type: GrantFiled: March 9, 1983Date of Patent: November 13, 1984Assignee: Toyota Jidosha Kabushiki KaishaInventor: Tatsuo Kobayashi
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Patent number: 4465952Abstract: A spark plug for internal combustion engines has center and grounded electrodes having surfaces disposed adjacent to a spark gap between the electrodes and directed to but spaced from each other and also have side faces converging toward the spark gap. Each of the electrodes is provided with a piece of a noble metal secured to the surface directed to the other electrode. The noble metal pieces provided on both electrodes define the spark gap therebetween.Type: GrantFiled: March 4, 1982Date of Patent: August 14, 1984Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki KaishaInventors: Yasuyuki Sato, Norihiko Nakamura, Tatsuo Kobayashi
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Patent number: 4463722Abstract: An engine knock sensor for sensing knocking occurring in an internal combustion engine. The vibration in the engine, involving the vibration component caused by the knocking, is sensed by a vibration sensor. A feed back control is achieved by a closed loop constituted by a variable-gain amplifier the gain of which is controllable and adapted for amplifting the electric signal from the vibration sensor corresponding to the vibration, a mean level detecting circuit for calculating the mean value of the level of the amplified signal and outputting a mean level signal, and a gain controller for effecting a control of the gain of the variable-gain amplifier in accordance with the mean level signal so as to maintain the level of the amplified signal above a predetermined level. A predetermined voltage is added to the mean level signal to produce a reference signal which is compared by a comparator with the amplified signal from the variable-gain amplifier.Type: GrantFiled: March 17, 1983Date of Patent: August 7, 1984Assignee: Toyota Jidosha Kabushiki KaishaInventor: Tatsuo Kobayashi
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Patent number: 4176646Abstract: Disclosed is a method of igniting in an internal combustion engine comprising a main combustion chamber and an auxiliary combustion chamber which are interconnected to each other by a connecting passage. The spark gap of the spark plug is located in the connecting passage. A ratio of the volume of the auxiliary combustion chamber to the cross-sectional area of the connecting passage is set in the range of 5 through 15 cm for creating a strong swirl motion of the combustible mixture in the auxiliary combustion chamber at the time of the compression stroke. The length of the continuance time of the discharging arc is set at approximately 1 m sec.Type: GrantFiled: May 31, 1977Date of Patent: December 4, 1979Assignee: Toyota Jidosha Kogyo Kabushiki KaishaInventors: Norihiko Nakamura, Takashi Kato, Tatsuo Kobayashi
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Patent number: 4108133Abstract: An auxiliary combustion chamber shell of an internal combustion engine comprising a main combustion chamber having an intake valve and an exhaust valve, an auxiliary combustion chamber having no intake valve, a passage communicating the main and auxiliary combustion chambers, and an ignition spark plug whose electrode is positioned in the auxiliary combustion chamber. The auxiliary combustion chamber is pressed into a cylinder head to improve radiation effect, and held fast by the ignition spark plug. The auxiliary combustion chamber is divided into a high temperature portion adjacent to the communication passage and a secluded portion opposite the passage where the temperature is relatively low.Type: GrantFiled: August 24, 1976Date of Patent: August 22, 1978Assignee: Toyota Jidosha Kogyo Kabushiki KaishaInventors: Masami Konishi, Norihiko Nakamura, Tatsuo Kobayashi, Toyokazu Baika
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Patent number: 4084373Abstract: A system for supplying secondary air into the exhaust system of internal combustion engines having in combination two parallel systems, one feeding air depending upon the exhaust gas pressure pulsation and the other feeding air depending upon the delivery of an air pump driven by the output power of the engine.Type: GrantFiled: June 23, 1976Date of Patent: April 18, 1978Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Aisan Kogyo Kabushiki KaishaInventors: Masanao Hashimoto, Tadashi Saitou, Tatsuo Kobayashi, Isamu Suzuki