Patents by Inventor Mitsuhiro Nomura
Mitsuhiro Nomura 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: 20230096964Abstract: A grinding apparatus includes a grinding water supply mechanism that includes a plurality of jet nozzles that jet grinding water to outside surfaces of grindstones, communication passages that make each of the jet nozzles and a water supply source communicate with each other, and valves disposed in the communication passages on a jet nozzle basis, in which opening and closing of the valves are controlled according to the position of the chuck table relative to the grindstones such that the grinding water is jetted only to that region of the grindstones that makes contact with a workpiece.Type: ApplicationFiled: September 22, 2022Publication date: March 30, 2023Inventors: Mitsuhiro NOMURA, Masataka HIRAO
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Patent number: 10316765Abstract: A control device for an internal combustion engine includes an intake-side variable valve timing mechanism and a controller. The intake-side variable valve timing mechanism is configured to continuously advance or retard a phase of a cam that actuates an intake valve. The controller is configured to actuate the intake-side variable valve timing mechanism toward a retardation side and position the intake-side variable valve timing mechanism at a prescribed position, and execute fail-safe control on the basis of a signal from a cam position sensor instead of a signal from the crank position sensor, when it is determined that there is a failure in a crank position sensor of the internal combustion engine.Type: GrantFiled: November 15, 2013Date of Patent: June 11, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Mitsuhiro Nomura
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Patent number: 10052742Abstract: A grinding wheel used for grinding of a work piece is provided. The grinding wheel includes a circular disc-shaped base having a fixed end surface in contact with a mount of grinding apparatus and a free end surface on the opposite side to the fixed end surface, and plural abrasive stone chips arranged in a ring manner on the free end surface of the base. The abrasive stone chips are each formed into a block shape having a surface in which two or more kinds of plate-shaped abrasive stone members containing abrasive grains and a binder are exposed to the outside by overlapping the two or more kinds of abrasive stone members. The surfaces exposed to the outside in the abrasive stone chips serve as grinding processing surfaces that get contact with the work piece.Type: GrantFiled: February 23, 2016Date of Patent: August 21, 2018Assignee: DISCO CORPORATIONInventors: Takashi Fukazawa, Mitsuhiro Nomura, Suguru Hiraiwa, Toyohiro Komiyama, Takashi Fujiyoshi, Kazuyuki Takata
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Publication number: 20160263729Abstract: A grinding wheel used for grinding of a work piece is provided. The grinding wheel includes a circular disc-shaped base having a fixed end surface in contact with a mount of grinding apparatus and a free end surface on the opposite side to the fixed end surface, and plural abrasive stone chips arranged in a ring manner on the free end surface of the base. The abrasive stone chips are each formed into a block shape having a surface in which two or more kinds of plate-shaped abrasive stone members containing abrasive grains and a binder are exposed to the outside by overlapping the two or more kinds of abrasive stone members. The surfaces exposed to the outside in the abrasive stone chips serve as grinding processing surfaces that get contact with the work piece.Type: ApplicationFiled: February 23, 2016Publication date: September 15, 2016Inventors: Takashi Fukazawa, Mitsuhiro Nomura, Suguru Hiraiwa, Toyohiro Komiyama, Takashi Fujiyoshi, Kazuyuki Takata
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Publication number: 20150211424Abstract: A control device for an internal combustion engine includes an intake-side variable valve timing mechanism and a controller. The intake-side variable valve timing mechanism is configured to continuously advance or retard a phase of a cam that actuates an intake valve. The controller is configured to actuate the intake-side variable valve timing mechanism toward a retardation side and position the intake-side variable valve timing mechanism at a prescribed position, and execute fail-safe control on the basis of a signal from a cam position sensor instead of a signal from the crank position sensor, when it is determined that there is a failure in a crank position sensor of the internal combustion engine.Type: ApplicationFiled: November 15, 2013Publication date: July 30, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Mitsuhiro Nomura
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Patent number: 8180552Abstract: In valve timing control after issuance of an engine stop instruction with a prescribed value set as a target phase, an ECU delays permission of an engine stop process within a prescribed time period while an intake valve phase has not yet reached the target value, so that a valve timing control operation is continued while the engine operation is continued in an idle state. After the lapse of a prescribed time period from the issuance of the engine stop instruction, however, the ECU permits the engine stop process no matter whether the intake valve phase has reached the target value or not. As a result, the amount of valve timing that can be changed by the valve timing control in the engine stop operation can be increased, without causing any uncomfortable feeling of the driver.Type: GrantFiled: June 1, 2007Date of Patent: May 15, 2012Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Mitsuhiro Nomura, Haruyuki Urushihata
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Patent number: 8042503Abstract: In a variable valve timing apparatus having a VVT mechanism in each of a plurality of banks, start of a valve timing control is not permitted until reference position learning of valve timing is completed in the corresponding bank and in other banks. Accordingly, the plurality of banks come to have matching valve timing setting at the time of valve timing control, whereby variation in the amount of air introduced to cylinders can be suppressed, and satisfactory combustion characteristics can be maintained.Type: GrantFiled: February 21, 2007Date of Patent: October 25, 2011Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Yasumichi Inoue, Zenichiro Mashiki, Mitsuhiro Nomura, Haruyuki Urushihata
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Publication number: 20100235067Abstract: In valve timing control after issuance of an engine stop instruction with a prescribed value set as a target phase, an ECU delays permission of an engine stop process within a prescribed time period while an intake valve phase has not yet reached the target value, so that a valve timing control operation is continued while the engine operation is continued in an idle state. After the lapse of a prescribed time period from the issuance of the engine stop instruction, however, the ECU permits the engine stop process no matter whether the intake valve phase has reached the target value or not. As a result, the amount of valve timing that can be changed by the valve timing control in the engine stop operation can be increased, without causing any uncomfortable feeling of the driver.Type: ApplicationFiled: June 1, 2007Publication date: September 16, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Mitsuhiro Nomura, Haruyuki Urushihata
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Publication number: 20090071425Abstract: In a variable valve timing apparatus having a VVT mechanism in each of a plurality of banks, start of a valve timing control is not permitted until reference position learning of valve timing is completed in the corresponding bank and in other banks. Accordingly, the plurality of banks come to have matching valve timing setting at the time of valve timing control, whereby variation in the amount of air introduced to cylinders can be suppressed, and satisfactory combustion characteristics can be maintained.Type: ApplicationFiled: February 21, 2007Publication date: March 19, 2009Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Yasumichi Inoue, Zenichiro Mashiki, Mitsuhiro Nomura, Haruyuki Urushihata
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Patent number: 7128053Abstract: The engine ECU executes the program including the step of starting a timer that counts the time elapsed from a start request, the step of detecting a temperature of the engine, and the step of calculating a DI ratio r such that the fuel is injected from the in-cylinder injector as well, when the engine is in the very cold or cold state, when there is no abnormality in the fuel system, and when starting of the engine is not yet detected even after a lapse of a predetermined period of time from the start request, only if the fuel pressure in the high-pressure system is not lower than a fuel pressure threshold value.Type: GrantFiled: September 8, 2005Date of Patent: October 31, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takeshi Tokuda, Shigeo Okubo, Mitsuhiro Nomura
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Patent number: 7124740Abstract: In feedback control of a discharge amount of a high pressure fuel pump in which an actual fuel pressure is caused to become a target fuel pressure, when a deviation between the target fuel pressure and the actual fuel pressure has transiently changed, updating of an integral term of the feedback control is stopped. As a result, needless updating of the integral term when the deviation of the target fuel pressure and the actual fuel pressure has transiently increased is inhibited, and fuel pressure overshoot is reliably suppressed.Type: GrantFiled: September 27, 2005Date of Patent: October 24, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Mitsuhiro Nomura, Yasumichi Inoue
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Patent number: 7107968Abstract: An engine ECU performs a program including the steps of calculating an amount of the fuel required to be discharged from high-pressure fuel pumps (the required discharge amount), determining whether one high-pressure fuel pump can be stopped, and if not, determining whether the required discharge amount exceeds a maximum possible discharge amount of one high-pressure fuel pump of smaller capability, and if not, causing the two high-pressure fuel pumps to discharge the fuel in approximately equal amount, or if so, causing the high-pressure fuel pump of smaller capability to discharge the fuel of the maximum possible discharge amount and causing the high-pressure fuel pump of larger capability to discharge the fuel of the amount obtained by subtracting the discharge amount of the high-pressure fuel pump of smaller capability from the required discharge amount.Type: GrantFiled: June 24, 2005Date of Patent: September 19, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventor: Mitsuhiro Nomura
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Patent number: 7073486Abstract: An engine ECU executes a program including the steps of, when it is necessary to calculate an integral term, employing an integral term for use when two pumps are operating for calculation of a duty when the number of operating pumps is 2 and storing the calculated integral term in a memory as the one for use in the case of two pumps operating, and employing an integral term for use when one pump is operating for calculation of a duty when the number of operating pumps is not 2 and storing the calculated integral term in the memory as the one for use in the case of one pump operating.Type: GrantFiled: June 27, 2005Date of Patent: July 11, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Mitsuhiro Nomura, Yasumichi Inoue
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Patent number: 7059309Abstract: An ECU varies a period during which an intake valve and an exhaust valve are both simultaneously open by setting a target overlap angle OVP to be equal to a limit overlap angle OVL until the coolant temperature becomes higher than a reference temperature to reduce the internal EGR amount. This prevents combustion deterioration in a gasoline engine.Type: GrantFiled: February 15, 2005Date of Patent: June 13, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventor: Mitsuhiro Nomura
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Publication number: 20060081219Abstract: In feedback control of a discharge amount of a high pressure fuel pump in which an actual fuel pressure is caused to become a target fuel pressure, when a deviation between the target fuel pressure and the actual fuel pressure has transiently changed, updating of an integral term of the feedback control is stopped. As a result, needless updating of the integral term when the deviation of the target fuel pressure and the actual fuel pressure has transiently increased is inhibited, and fuel pressure overshoot is reliably suppressed.Type: ApplicationFiled: September 27, 2005Publication date: April 20, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuhiro Nomura, Yasumichi Inoue
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Publication number: 20060054137Abstract: The engine ECU executes the program including the step of starting a timer that counts the time elapsed from a start request, the step of detecting a temperature of the engine, and the step of calculating a DI ratio r such that the fuel is injected from the in-cylinder injector as well, when the engine is in the very cold or cold state, when there is no abnormality in the fuel system, and when starting of the engine is not yet detected even after a lapse of a predetermined period of time from the start request, only if the fuel pressure in the high-pressure system is not lower than a fuel pressure threshold value.Type: ApplicationFiled: September 8, 2005Publication date: March 16, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Tokuda, Shigeo Okubo, Mitsuhiro Nomura
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Publication number: 20060027213Abstract: An engine ECU executes a program including the steps of, when it is necessary to calculate an integral term, employing an integral term for use when two pumps are operating for calculation of a duty when the number of operating pumps is 2 and storing the calculated integral term in a memory as the one for use in the case of two pumps operating, and employing an integral term for use when one pump is operating for calculation of a duty when the number of operating pumps is not 2 and storing the calculated integral term in the memory as the one for use in the case of one pump operating.Type: ApplicationFiled: June 27, 2005Publication date: February 9, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuhiro Nomura, Yasumichi Inoue
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Publication number: 20060021598Abstract: An engine ECU performs a program including the steps of calculating an amount of the fuel required to be discharged from high-pressure fuel pumps (the required discharge amount), determining whether one high-pressure fuel pump can be stopped, and if not, determining whether the required discharge amount exceeds a maximum possible discharge amount of one high-pressure fuel pump of smaller capability, and if not, causing the two high-pressure fuel pumps to discharge the fuel in approximately equal amount, or if so, causing the high-pressure fuel pump of smaller capability to discharge the fuel of the maximum possible discharge amount and causing the high-pressure fuel pump of larger capability to discharge the fuel of the amount obtained by subtracting the discharge amount of the high-pressure fuel pump of smaller capability from the required discharge amount.Type: ApplicationFiled: June 24, 2005Publication date: February 2, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Mitsuhiro Nomura
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Publication number: 20050193995Abstract: An ECU varies a period during which an intake valve and an exhaust valve are both simultaneously open by setting a target overlap angle OVP to be equal to a limit overlap angle OVL until the coolant temperature becomes higher than a reference temperature to reduce the internal EGR amount. This prevents combustion deterioration in a gasoline engine.Type: ApplicationFiled: February 15, 2005Publication date: September 8, 2005Inventor: Mitsuhiro Nomura