Patents by Inventor Yoshinori Onohara
Yoshinori Onohara 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: 6732684Abstract: There is provided a solenoid-type valve actuator for an internal combustion engine, having an inexpensive and single construction which is capable of maintaining stability of operation of a valve and reducing sliding resistance to the valve at the same time, thereby achieving improved response of the valve and reduced power consumption of electromagnets. The solenoid-type valve actuator electromagnetically opens and closes a valve. Two electromagnets are arranged in a manner opposed to each other with a space therebetween. An armature is arranged between the two electromagnets, for reciprocating motion by energization and deenergization of the two electromagnets. Two shafts project from respective opposite sides of the armature and extend through the two electromagnets, respectively, one of the shafts being connected to the valve.Type: GrantFiled: December 20, 2001Date of Patent: May 11, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinori Onohara, Kouichi Ikoma, Yoshitomo Kouno
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Patent number: 6729277Abstract: An electromagnetic valve controller estimates a dead time based on predetermined parameters. A dead time for the current cycle is determined based on the estimated dead time. The controller measures a dead time in the previous cycle. The controller determines a deviation between the dead time measured in the previous cycle and the dead time estimated in the previous cycle. The deviation is added to the dead time estimated in the current cycle to determine the dead time for the current cycle. The controller further determines a target de-energization timing indicating when to execute a valve timing command. The dead time determined for the current cycle is offset or subtracted from the target de-energization timing to determine an actual de-energization timing. An electromagnet of the valve is de-energized in accordance with the actual de-energization timing.Type: GrantFiled: November 14, 2001Date of Patent: May 4, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Toshihiro Yamaki, Minoru Nakamura, Yoshinori Onohara
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Patent number: 6477994Abstract: The invention provides an electromagnetic driving valve of an internal combustion engine provided with a significantly compact shock absorbing means which can reduce an impact sound and a vibration in a contact portion between a first transmission shaft and a second transmission shaft and reduce an impact sound and a vibration generated at a time when a valve portion sits on an intake and exhaust port at a time of closing a valve. A shock absorbing means (27) is provided between a first transmission shaft (14a) extended upward from a valve portion (3) and a second transmission shaft (14b) extended on the same axis thereof and supporting a movable plate (7) between a pair of electromagnets (5, 6).Type: GrantFiled: November 16, 2001Date of Patent: November 12, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Atsushi Umemoto, Kenji Abe, Yoshinori Onohara, Kouichi Ikoma
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Patent number: 6414406Abstract: There is provided a provide a solenoid actuator which is capable of smoothly driving a driven member, with enhanced durability, and at the same time permits the stroke of the driven member to be changed with ease. A solenoid actuator drives a valve by an electromagnetic force such that the valve performs reciprocating motion. An armature is connected to the valve, for performing reciprocating motion in accordance with energization and deenergization of at least one electromagnet to thereby drive the valve such that the valve performs the reciprocating motion. The armature has two end faces extending in parallel with each other in a direction orthogonal to a direction of the reciprocating motion thereof. Two guide joints have respective two guide surface opposed to the two end faces of the armature, each formed with two armature guides.Type: GrantFiled: October 25, 2000Date of Patent: July 2, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kouichi Ikoma, Yoshinori Onohara, Osamu Suzuki
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Publication number: 20020078912Abstract: There is provided a solenoid-type valve actuator for an internal combustion engine, having an inexpensive and single construction which is capable of maintaining stability of operation of a valve and reducing sliding resistance to the valve at the same time, thereby achieving improved response of the valve and reduced power consumption of electromagnets. The solenoid-type valve actuator electromagnetically opens and closes a valve. Two electromagnets are arranged in a manner opposed to each other with a space therebetween. An armature is arranged between the two electromagnets, for reciprocating motion by energization and deenergization of the two electromagnets. Two shafts project from respective opposite sides of the armature and extend through the two electromagnets, respectively, one of the shafts being connected to the valve.Type: ApplicationFiled: December 20, 2001Publication date: June 27, 2002Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Yoshinori Onohara, Kouichi Ikoma, Yoshitomo Kouno
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Publication number: 20020056421Abstract: The invention provides an electromagnetic driving valve of an internal combustion engine provided with a significantly compact shock absorbing means which can reduce an impact sound and a vibration in a contact portion between a first transmission shaft and a second transmission shaft and reduce an impact sound and a vibration generated at a time when a valve portion sits on an intake and exhaust port at a time of closing a valve. A shock absorbing means (27) is provided between a first transmission shaft (4a) extended upward from a valve portion (3) and a second transmission shaft (4b) extended on the same axis thereof and supporting a movable plate (7) between a pair of electromagnets (5, 6).Type: ApplicationFiled: November 16, 2001Publication date: May 16, 2002Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Atsushi Umemoto, Kenji Abe, Yoshinori Onohara, Kouichi Ikoma
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Publication number: 20020056422Abstract: An electromagnetic valve controller estimates a dead time based on predetermined parameters. A dead time for the current cycle is determined based on the estimated dead time. The controller measures a dead time in the previous cycle. The controller determines a deviation between the dead time measured in the previous cycle and the dead time estimated in the previous cycle. The deviation is added to the dead time estimated in the current cycle to determine the dead time for the current cycle. The controller further determines a target de-energization timing indicating when to execute a valve timing command, based on predetermined parameters. The dead time determined for the current cycle is offset or subtracted from the target de-energization timing to determine an actual de-energization timing. An electromagnet of the valve is de-energized in accordance with the actual de-energization timing.Type: ApplicationFiled: November 14, 2001Publication date: May 16, 2002Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Toshihiro Yamaki, Minoru Nakamura, Yoshinori Onohara
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Patent number: 6237550Abstract: A solenoid-operated valve for use in an internal combustion engine has a valve body movable into and out of abutment of an intake/exhaust port in the internal combustion engine to close and open an intake/exhaust passage in communication therewith, a movable plate connected to the valve body by a transmission valve stem, a first solenoid for magnetically attracting the movable plate to cause the valve body to close the intake/exhaust port, and a second solenoid disposed in confronting relation to the first solenoid with the movable plate interposed therebetween, for magnetically attracting the movable plate to cause the valve body to open the intake/exhaust port. A piston is movable in a cylinder in unison with the transmission valve stem until the valve body closes the intake/exhaust port when the first solenoid magnetically attracts the movable plate to position the valve body closely to the intake/exhaust port.Type: GrantFiled: November 23, 1999Date of Patent: May 29, 2001Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Harumi Hatano, Chihaya Sugimoto, Yoshinori Onohara, Kouichi Ikoma