Patents by Inventor Toshio Takaoka
Toshio Takaoka 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: 11566558Abstract: A controller of a fan coupling device includes: an acquisition unit that acquires an acceleration parameter and a deviation parameter; a control unit that controls a regulation mechanism; a prediction unit that predicts that hunting occurs in the rotation speed of the fan, when an operating point of the fan expressed with the deviation parameter and the acceleration parameter belongs to a predicted region; and a restraining unit that executes, when the hunting is predicted to occur, a hunting restraining process of executing at least one of lowering an integral gain of a feedback control to be lower than when the hunting is not predicted to occur and increasing a derivative gain of the feedback control to be higher than when the hunting is not predicted to occur.Type: GrantFiled: March 26, 2021Date of Patent: January 31, 2023Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masaaki Yamaguchi, Toshio Takaoka, Noboru Takagi, Shoichi Akiyama
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Publication number: 20210332739Abstract: A controller of a fan coupling device includes: an acquisition unit that acquires an acceleration parameter and a deviation parameter; a control unit that controls a regulation mechanism; a prediction unit that predicts that hunting occurs in the rotation speed of the fan, when an operating point of the fan expressed with the deviation parameter and the acceleration parameter belongs to a predicted region; and a restraining unit that executes, when the hunting is predicted to occur, a hunting restraining process of executing at least one of lowering an integral gain of a feedback control to be lower than when the hunting is not predicted to occur and increasing a derivative gain of the feedback control to be higher than when the hunting is not predicted to occur.Type: ApplicationFiled: March 26, 2021Publication date: October 28, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaaki YAMAGUCHI, Toshio TAKAOKA, Noboru TAKAGI, Shoichi AKIYAMA
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Patent number: 11028763Abstract: An engine cooling device has a mechanical water pump, a flow rate control valve having a valve body of which a relative rotational position is changed by a motor, and a control unit that performs drive control of the motor to change the relative rotational position of the valve body to a target relative rotational position. The control unit performs protection control for setting the relative rotational position where a withstanding pressure limit rotational speed is equal to or higher than a current engine rotational speed, as a target operating position of the valve body of the flow rate control valve when the engine rotational speed rises, and performs retreat control for reducing a set range of the target relative rotational position to a prescribed retreat operation range when the supply voltage of the in-vehicle electric power supply has dropped.Type: GrantFiled: August 19, 2020Date of Patent: June 8, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Noboru Takagi, Kazuki Kato, Masaaki Yamaguchi, Toshio Takaoka
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Publication number: 20210087964Abstract: An engine cooling device has a mechanical water pump, a flow rate control valve having a valve body of which a relative rotational position is changed by a motor, and a control unit that performs drive control of the motor to change the relative rotational position of the valve body to a target relative rotational position. The control unit performs protection control for setting the relative rotational position where a withstanding pressure limit rotational speed is equal to or higher than a current engine rotational speed, as a target operating position of the valve body of the flow rate control valve when the engine rotational speed rises, and performs retreat control for reducing a set range of the target relative rotational position to a prescribed retreat operation range when the supply voltage of the in-vehicle electric power supply has dropped.Type: ApplicationFiled: August 19, 2020Publication date: March 25, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Noboru TAKAGI, Kazuki KATO, Masaaki YAMAGUCHI, Toshio TAKAOKA
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Patent number: 9897029Abstract: A control apparatus for an internal combustion engine, the internal combustion engine including a plurality of cylinders, and the control apparatus including: an electronic control unit configured to: a) determine whether or not acceleration of a crank shaft at compression top dead center is equal to or greater than a threshold value; b) determine that a compression loss has occurred in the cylinder, when the acceleration of the crank shaft is equal to or greater than the threshold value; and c) prohibit the determination of compression loss, when acceleration of rotation of the crank shaft at compression top dead center has occurred a first specific number of times consecutively in the plurality of cylinders.Type: GrantFiled: June 11, 2015Date of Patent: February 20, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshio Maeda, Toshio Takaoka
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Publication number: 20170002758Abstract: An engine control device for a vehicle is provided. The engine control device includes an electronic control unit configured to: obtain a required torque for the engine; obtain an engine torque; and determine the excessive torque state when a state in which an excess of the engine torque over the required torque is greater than or equal to a preset torque threshold value continues for a preset time threshold value or more. The time threshold value is set to be a longer time when the excess of the engine torque over the required torque is relatively small, compared to when the excess of the engine torque over the required torque is relatively large.Type: ApplicationFiled: June 29, 2016Publication date: January 5, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshihiro NISHIMURA, Toshio TAKAOKA, Tsutomu MIYAZAKI
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Publication number: 20150361911Abstract: A control apparatus for an internal combustion engine, the internal combustion engine including a plurality of cylinders, and the control apparatus including: an electronic control unit configured to: a) determine whether or not acceleration of a crank shaft at compression top dead center is equal to or greater than a threshold value; b) determine that a compression loss has occurred in the cylinder, when the acceleration of the crank shaft is equal to or greater than the threshold value; and c) prohibit the determination of compression loss, when acceleration of rotation of the crank shaft at compression top dead center has occurred a first specific number of times consecutively in the plurality of cylinders.Type: ApplicationFiled: June 11, 2015Publication date: December 17, 2015Applicant: Toyota Jidosha Kabushiki KaishaInventors: Toshio MAEDA, Toshio Takaoka
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Patent number: 9050965Abstract: When an ECU determines that an accelerator is “ON” and a brake is “ON”, the ECU determines whether or not the brake previously depressed is “OFF”. When the ECU determines that the brake previously depressed is “OFF” and that the vehicle is in the reduced speed state, the vehicle control apparatus is configured to execute an engine output reduction control process under the condition that the simultaneous depressions of the accelerator and brake pedals continues for less than 10 seconds and the vehicle speed is not less than 7 km/hr. When the simultaneous depressions of the accelerator and brake pedals continues for no less than 10 seconds, the ECU is configured to make an output reduction prohibition flag “ON” and not to execute the engine output reduction control process until a predetermined time elapses.Type: GrantFiled: December 17, 2009Date of Patent: June 9, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiya Oishi, Toshio Takaoka, Masashi Takagi, Michihito Shimada, Yuki Minase, Kenichi Okaya, Tsutomu Miyazaki
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Publication number: 20120290188Abstract: Disclosed is a vehicle control apparatus which can prevent a drivability of a vehicle from being deteriorated. When an ECU determines that an accelerator is “ON” and a brake is “ON”, the ECU determines whether or not the brake previously depressed is “OFF”. When the ECU determines that the brake previously depressed is “OFF” and that the vehicle is in the reduced speed state, the vehicle control apparatus is operative to execute an engine output reduction control process under the condition that the simultaneous depressions of the accelerator and brake pedals continues for less than 10 seconds and the vehicle speed is not less than 7 km/hr. When the simultaneous depressions of the accelerator and brake pedals continues for no less than 10 seconds, the ECU is operative to make an output reduction prohibition flag “ON” and not to execute the engine output reduction control process until a predetermined time elapses.Type: ApplicationFiled: December 17, 2009Publication date: November 15, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiya Oishi, Toshio Takaoka, Masashi Takagi, Michihito Shimada, Yuki Minase, Kenichi Okaya, Tsutomu Miyazaki
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Publication number: 20050092133Abstract: The present invention provides a method of desulfurizing hot metal, which method utilizes desulfurization slag resulting from a KR hot metal desulfurizing treatment as a desulfurizing agent for hot metal again to reduce hot metal desulfurization costs and the amount of slag generated, thereby solving environmental problems.Type: ApplicationFiled: December 13, 2004Publication date: May 5, 2005Applicants: NKK Corporation, Kokan Mining Co. Ltd.Inventors: Yoshie Nakai, Hiroshi Shimizu, Toshio Takaoka, Yoshiteru Kikuchi, Shuei Tanaka, Shinichi Wakamatsu, Atsushi Watanabe, Osamu Yamase
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Publication number: 20030177864Abstract: The present invention provides a method of desulfurizing hot metal, which method utilizes desulfurization slag resulting from a KR hot metal desulfurizing treatment as a desulfurizing agent for hot metal again to reduce hot metal desulfurization costs and the amount of slag generated, thereby solving environmental problems.Type: ApplicationFiled: December 12, 2002Publication date: September 25, 2003Inventors: Yoshie Nakai, Hiroshi Shimizu, Toshio Takaoka, Yoshiteru Kikuchi, Shuei Tanaka, Shinichi Wakamatsu, Atsushi Watanabe, Osamu Yamase
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Patent number: 6237387Abstract: A guide roller apparatus has entry guide and an upper guide provided at an entrance side of an advancing path for a workpiece material to be rolled, and side rollers, upper and lower guide rollers and further tip end chips downward thereof are sequentially provided. The the workpiece is guided into grooves of rolling rollers of a rolling mill without force by the guide roller apparatus. The guide roller apparatus guides the workpiece material having a width larger than that of a caliber of the rolling roll without rolling flaw or torsion occurring in the material to be rolled.Type: GrantFiled: September 21, 1999Date of Patent: May 29, 2001Assignee: Kotobuki Sangyo Kabushiki KaishaInventors: Sadao Yoshizawa, Toshio Takaoka, Takahiro Miyamoto
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Patent number: 5502920Abstract: A retrofittable insecticide distribution system comprising an above ground horizontal pipe (20) having a plurality of vertical pipes (30) penetrating into the ground. Fluid absorbing means (56) in housings (50) are provided around the ends of horizontal and vertical members and communicate with the horizontal pipes or a vertical pipe. Insecticide can be introduced into the system either by pumping or by being placed in an elevated reservoir (90) with gravity providing the pumping force. The vertical pipes in the ground can be provided with a variety of distribution means, including simple holes, a downwardly oriented sprinkler head (42) or a distribution ball (44) having a plurality of slots (46) filled with plastic beads (48).Type: GrantFiled: November 10, 1994Date of Patent: April 2, 1996Inventor: Toshio Takaoka
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Patent number: 5394642Abstract: A retrofittable insecticide distribution system comprising an above ground horizontal pipe (20) having a plurality of vertical pipes (30) penetrating into the ground. Fluid absorbing means (56) in housings (50) are provided around the ends of horizontal and vertical members and communicate with the horizontal pipes or a vertical pipe. Insecticide can be introduced into the system either by pumping or by being placed in an elevated reservoir (90) with gravity providing the pumping force. The vertical pipes in the ground can be provided with a variety of distribution means, including simple holes, a downwardly oriented sprinkler head (42) or a distribution ball (44) having a plurality of slots (46) filled with plastic beads (48).Type: GrantFiled: October 5, 1993Date of Patent: March 7, 1995Inventor: Toshio Takaoka
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Patent number: 5393403Abstract: A probe having the inventive composition, it is possible to measure the activity of the solute carbon which could not be measured by the prior art because there did not exist solid oxide or solid composite oxide which were stable at high temperature.The probe comprises a solid electrolyte having a mixed subelectrode provided on its surface, and a reference electrode for providing a predetermined oxygen potential is disclosed. The mixed sub-electrode coating on the solid electrolyte includes a mixture of a carbide MC and of an oxide MO of the element M other than carbon of which the carbide is constituted.Type: GrantFiled: May 25, 1993Date of Patent: February 28, 1995Assignees: NKK Corporation, Minoru Sasabe, Osaka Sanso Kogyo Ltd.Inventors: Minoru Sasabe, Yoshihiko Kawai, Yoshiteru Kikuchi, Toshio Takaoka, Hiromi Seno, Chikayashi Furuta, Toshio Nagatsuka
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Patent number: 5363826Abstract: An apparatus for controlling an air-fuel ratio in a lean burn internal combustion engine, such that three different air-fuel ratio zones are set, the three zones being an ultra lean zone with a low load, a medium lean zone with a medium load, and a non-lean zone with a high load. When the engine is under low load conditions, a map FLEANPM is selected to obtain an ultra lean air-fuel ratio based on detected intake pressure PM values and engine speed NE. When the engine is under medium load conditions, a map FLEANTA is selected to obtain a medium lean air-fuel ratio based on a detected throttle opening values TA and engine speed NE. When the engine is under high load, conditions the lean correction control is canceled, thereby obtaining a theoretical air-fuel ratio or an air-fuel ratio smaller than the theoretical air-fuel ratio, and when the engine remains at a point in the medium lean zone, the air-fuel ratio decreases gradually toward the theoretical air-fuel ratio as time elapses.Type: GrantFiled: February 10, 1993Date of Patent: November 15, 1994Assignee: Toyota Jidosha Kabushiki KaishaInventor: Toshio Takaoka
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Patent number: 5190008Abstract: A lean burn internal combustion engine has a basic fuel injection amount calculated and multiplied by a lean correction factor, the resulting amount controls the air fuel ratio of the engine. The lean correction multiplied by factor is calculated from a first map based on intake pressure and engine speed. However, when the degree of opening of the throttle valve is larger than a predetermined value, a second correction map based on the degree of opening of the throttle valve and engine speed is used to obtain the lean correction factor. When the second correction map is employed, an ignition timing map based on the degree of opening of the throttle valve and engine speed is used to obtain an ignition timing; instead of the usual ignition timing, based on intake pressure and engine speed.Type: GrantFiled: August 4, 1992Date of Patent: March 2, 1993Assignees: Fujitsu Ten Limited, Toyota Jidosha Kabushiki KaishaInventors: Hirofumi Yamasaki, Kiyoshi Yagi, Keisuke Tsukamoto, Toshio Takaoka, Takao Fukuma
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Patent number: 5146885Abstract: An air-fuel ratio control device for an engine, by which the air-fuel ratio of the air-fuel mixture supplied to the engine is changed. The device set the air-fuel ratio to a lean mixture when the engine load is lower than a set load value and predetermined set speed, and when the engine load become higher than the set load value, or the engine speed exceeds the set speed, the device switches the air-fuel ratio from a lean mixture to a rich mixture to obtain higher engine output. The set load value is varied in accordance with the engine speed such that it is reduced as the engine speed is increased.Type: GrantFiled: October 31, 1991Date of Patent: September 15, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takao Fukuma, Keisuke Tsukamoto, Toshio Takaoka, Hirofumi Yamasaki
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Patent number: 5099942Abstract: A traction control device comprising a cylinder number determining device for determining the number of cylinders to which the supply of fuel is to be stopped, in accordance with the speed difference between a rotating speed of a free running wheel and a rotating speed of a driven wheel. A change of an actual number of cylinders to which the supply of fuel is actually stopped by a fuel stop controlling device is prohibited until a predetermined time has elapsed from a time at which the actual number of cylinders was changed.Type: GrantFiled: March 15, 1990Date of Patent: March 31, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoto Kushi, Toshio Takaoka
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Patent number: 5092297Abstract: An air-fuel ratio control device for an vehicle engine, by which the air-fuel ratio of the air-fuel mixture supplied to a vehicle engine is changed. The device sets the air-fuel ratio to a lean mixture when the engine coolant temperature is higher than a predetermined value and the vehicle speed is higher than a value determined by a time elapsed after engine startup.Type: GrantFiled: January 28, 1991Date of Patent: March 3, 1992Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keisuke Tsukamoto, Toshio Takaoka, Takao Fukuma, Hirofumi Yamasaki