Patents by Inventor Katsunori Satou
Katsunori Satou 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: 20240246528Abstract: An internal combustion engine is connected to a transmission via a torque converter. The transmission includes a continuously variable transmission mechanism and a clutch. When the transmission is switched from the P range to the D range, a rotation speed of the internal combustion engine decreases with engagement of the clutch. In order to suppress engine stalling in cold climates, electric power generation of an alternator is stopped to reduce an electric power generation load when a speed difference between the rotation speed of the engine and an input rotation speed of the transmission becomes greater than or equal to a predetermined speed difference value. The electric power generation is restarted after a predetermined time period has elapsed since the input rotation speed of the transmission became lower than or equal to a second predetermined rotation speed value.Type: ApplicationFiled: January 28, 2021Publication date: July 25, 2024Inventor: Katsunori SATOU
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Patent number: 10436312Abstract: A control system for an automatic transmission, when hydraulically controlling the speed ratio of a belt type continuously variable transmission that transmits power from an engine to driving wheels by shifting or speed change, limits the shift speed to or below a predetermined value when an accelerator pedal is off and the engine rotational speed is at or below a predetermined speed. As a result, it is possible to avoid a driver from feeling uncomfortable when shifting with the accelerator off.Type: GrantFiled: December 3, 2015Date of Patent: October 8, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Daigo Kishi, Katsunori Satou
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Publication number: 20180128367Abstract: A control system for an automatic transmission, when hydraulically controlling the speed ratio of a belt type continuously variable transmission that transmits power from an engine to driving wheels by shifting or speed change, limits the shift speed to or below a predetermined value when an accelerator pedal is off and the engine rotational speed is at or below a predetermined speed. As a result, it is possible to avoid a driver from feeling uncomfortable when shifting with the accelerator off.Type: ApplicationFiled: December 3, 2015Publication date: May 10, 2018Applicant: Nissan Motor Co., Ltd.Inventors: Daigo KISHI, Katsunori SATOU
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Patent number: 8065065Abstract: A lock-up control system including a lock-up differential pressure generator and a controller that is programmed to: when increasing a lock-up differential pressure command value with time to establish the lock-up state of the torque converter, switch a gradient of the lock-up differential pressure command value from a first gradient to a predetermined gradient larger than the first gradient when an actual slip rotation speed is decreased to a predetermined slip rotation speed value or less; and switch the gradient of the lock-up differential pressure command value from the predetermined gradient to a second gradient smaller than the predetermined gradient when the actual slip rotation speed exceeds the predetermined slip rotation speed value again after being decreased to the predetermined slip rotation speed value or less.Type: GrantFiled: June 16, 2008Date of Patent: November 22, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Katsunori Satou, Masaya Kubota, Hiroyuki Takenaka, Kan Yagi, Seiji Totsuka
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Patent number: 7780571Abstract: An automatic transmission control apparatus includes an engine rotational speed limit verifying section and a shift control characteristic changing section. The engine rotational speed limit verifying section is configured to receive an engine rotational speed limit value for limiting an engine rotational speed and determine if the engine rotational speed limit value is lower than a prescribed normal upper limit value. The shift control characteristic changing section is configured to change a shift schedule of an automatic transmission based on the engine rotational speed being limited by the engine rotational speed limit value and the automatic transmission having a stronger tendency to select a higher gear stage than if the engine rotational speed limit value was not being limited to a lower value than the prescribed normal limit value, when the engine rotational speed limit value is determined to lower than the prescribed normal upper limit value.Type: GrantFiled: June 13, 2008Date of Patent: August 24, 2010Assignee: JATCO LtdInventors: Kan Yagi, Jun Yoshino, Hitoshi Yokose, Tsuyoshi Mori, Katsunori Satou, Masaya Kubota, Hiroyuki Takenaka, Makoto Hashimoto
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Patent number: 7695405Abstract: A shift shock reducing apparatus for a power train having an engine and an automatic transmission having a frictional element that is to be engaged at upshift, comprising a control section that executes, during upshift, a torque down of the engine that starts before the start of an inertia phase in which a gear ratio of the transmission is changing from a before-shift gear ratio to an after-shift gear ratio, and a control section that makes larger a rising gradient of working oil pressure that is supplied to the frictional element to be engaged at upshift when the torque down that starts before the start of the inertia phase is executed than that when the torque down is not executed.Type: GrantFiled: August 8, 2007Date of Patent: April 13, 2010Assignees: Nissan Motor Co., Ltd., Jatco LtdInventors: Katsunori Satou, Kenichiro Murakami, Hiroyuki Takenaka, Yuzuru Tohta, Kan Yagi, Jun Yoshino
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Publication number: 20080312800Abstract: A lock-up control system including a lock-up differential pressure generator and a controller that is programmed to: when increasing a lock-up differential pressure command value with time to establish the lock-up state of the torque converter, switch a gradient of the lock-up differential pressure command value from a first gradient to a predetermined gradient larger than the first gradient when an actual slip rotation speed is decreased to a predetermined slip rotation speed value or less; and switch the gradient of the lock-up differential pressure command value from the predetermined gradient to a second gradient smaller than the predetermined gradient when the actual slip rotation speed exceeds the predetermined slip rotation speed value again after being decreased to the predetermined slip rotation speed value or less.Type: ApplicationFiled: June 16, 2008Publication date: December 18, 2008Inventors: Katsunori Satou, Masaya Kubota, Hiroyuki Takenaka, Kan Yagi, Seiji Totsuka
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Publication number: 20080312036Abstract: An automatic transmission control apparatus includes an engine rotational speed limit verifying section and a shift control characteristic changing section. The engine rotational speed limit verifying section is configured to receive an engine rotational speed limit value for limiting an engine rotational speed and determine if the engine rotational speed limit value is lower than a prescribed normal upper limit value. The shift control characteristic changing section is configured to change a shift schedule of an automatic transmission based on the engine rotational speed being limited by the engine rotational speed limit value and the automatic transmission having a stronger tendency to select a higher gear stage than if the engine rotational speed limit value was not being limited to a lower value than the prescribed normal limit value, when the engine rotational speed limit value is determined to lower than the prescribed normal upper limit value.Type: ApplicationFiled: June 13, 2008Publication date: December 18, 2008Applicant: JATCO LTDInventors: Kan YAGI, Jun YOSHINO, Hitoshi YOKOSE, Tsuyoshi MORI, Katsunori SATOU, Masaya KUBOTA, Hiroyuki TAKENAKA, Makoto HASHIMOTO
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Publication number: 20080051254Abstract: A shift shock reducing apparatus for a power train having an engine and an automatic transmission having a frictional element that is to be engaged at upshift, comprising a control section that executes, during upshift, a torque down of the engine that starts before the start of an inertia phase in which a gear ratio of the transmission is changing from a before-shift gear ratio to an after-shift gear ratio, and a control section that makes larger a rising gradient of working oil pressure that is supplied to the frictional element to be engaged at upshift when the torque down that starts before the start of the inertia phase is executed than that when the torque down is not executed.Type: ApplicationFiled: August 8, 2007Publication date: February 28, 2008Inventors: Katsunori Satou, Kenichiro Murakami, Hiroyuki Takenaka, Yuzuru Tohta, Kan Yagi, Jun Yoshino
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Patent number: 5962159Abstract: The battery pack which can be attached independent of its orientation houses rechargeable batteries within a case and has positive and negative (+ -) charge-discharge terminals at one end of the case. The charge-discharge terminals are arranged to connect to electrical apparatus without regard to the orientation of the front or back sides of the case. The + - charge-discharge terminals are sheet metal bent in flat-sided c-shapes, and comprise a parallel charge-discharge terminal piece which attaches to the case parallel to the case opening plane and a perpendicular charge-discharge terminal piece which attaches to the case perpendicular to the parallel charge-discharge terminal piece. The parallel charge-discharge terminal piece attaches by fitting into an attachment section formed as a single piece in the case opening.Type: GrantFiled: April 22, 1997Date of Patent: October 5, 1999Assignee: Sanyo Electric Co., Ltd.Inventors: Katsunori Satou, Naohisa Tsukamura