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Koji Oshima, Nagoya-Shi JP

Koji Oshima, Nagoya-Shi JP

Patent application numberDescriptionPublished
20080269013CONTROL DEVICE AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - “Threshold A is substituted in a power-on state, “threshold B”, which is lower than “threshold A”, is substituted in a power-off state, and “threshold C”, which is lower than “threshold B” is substituted during a brake operation, as a rapid deceleration determination threshold. The rotational speed of an output shaft of an automatic transmission and the rapid deceleration determination threshold are compared to determine whether a vehicle is rapidly decelerating. The engagement state of a lock-up clutch is controlled based on whether the vehicle is rapidly decelerating.10-30-2008
20090099743Control apparatus and control method for automatic transmission - An ECU executes a program including a step of down shifting by disengaging a B04-16-2009
20100057309CONTROL DEVICE FOR VEHICULAR AUTOMATIC TRANSMISSION - A control device for a vehicular automatic transmission which can realize a shifting with quickened response with suppressing a turbine blow-up during the shifting is provided. When a response in hydraulic pressure control by a hydraulic pressure control circuit 03-04-2010
20100100291VEHICLE, AND CONTROL METHOD AND CONTROL APPARATUS FOR AN AUTOMATIC TRANSMISSION - An ECU executes a program including the steps of: if downshift from a fifth gear implemented when a brake and a clutch both engage to a second gear implemented when a clutch and a brake both engage is done, or downshift from a sixth gear implemented when the brake and the clutch both engage to a third gear implemented when the clutch and the brake both engage is done, disengaging a frictional engagement element other than the clutch, i.e., the brake or the brake; and decreasing an engagement pressure that is applied to the clutch to a reference value of target engagement pressure.04-22-2010
20100292048CONTROL DEVICE AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - When it is determined to perform nth to (n+1)th coast downshift during nth to (n+1)th power-off upshift, an ECU starts increasing control to increase the hydraulic pressure of an engage-side element A in a predetermined mode and maintains the hydraulic pressure of a release-side element B at a value at which the increasing control is started until a predetermined period of time elapses from when the start of the increasing control. When a turbine rotational speed does not increase even after the predetermined period of time has elapsed, as the turbine rotational speed decreases below a value lower by a predetermined value than a synchronous rotational speed in the (n+1)th gear, the ECU executes feedback control over the hydraulic pressure of the element B so that the turbine rotational speed becomes the value lower by the predetermined value than the synchronous rotational speed in the (n+1)th gear.11-18-2010
20110238275CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - An ECU executes a program including causing a brake to enter an engaged state, when first gear is implemented and when a difference between an output shaft rotation speed estimated from an input shaft rotation speed and a detected output shaft rotation speed is greater than a threshold value. When the brake enters the engaged state, the relative rotation between the inner race and the outer race of a one-way clutch is limited.09-29-2011
20110315499CONTROL APPARATUS AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - An ECU executes a program including the steps of: starting monitoring the turbine revolution speed and the output shaft revolution speed when a direct shift is started; performing complete disengagement control on a disengagement element; lowering control pressure of a disengagement element to preliminarily fixed control pressure; starting engagement control on an engagement element when a set time period Ts passes; performing complete disengagement control on the disengagement element when a set time period Ts passes; and starting the engagement control on an engagement element when turbine revolution speed NT is equal to or larger than (the synchronous revolution speed of a gear after a shift—a set value Ns).12-29-2011
20110320097CONTROL APPARATUS AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - When a post-direct shift gear position does not match a target gear position during a direct shift but before engagement of an input clutch for the post-direct shift gear position begins, an ECU executes engagement control on a reaction brake for the new target gear position instead of executing engagement control on a reaction brake for the post-direct shift gear position, and executes engagement control on an input clutch for the new target gear position instead of executing engagement control on an input clutch for the post-direct shift gear position.12-29-2011
20120017724CONTROL APPARATUS AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - An ECU executes a program including the steps of: starting monitoring the turbine revolution speed and the output shaft revolution speed when a direct shift is started (YES in S01-26-2012

Patent applications by Koji Oshima, Nagoya-Shi JP

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