Aisin Seiki Kabushiki Kaisha

Akira Aikawa

Hiroaki Kato

Yasuo Shirai

Katsutoshi Sato

Atsumi Ohara

Kiyoharu Takagi

Daisuke Yuasa

A motor control device includes an acceleration portion for increasing a target number of rotations of a motor every predetermined calculation cycle until the target number of rotations of the motor reaches an upper limit number of rotations, which is set on the basis of a reached position of a driven object from a reference position, the driven object is driven by the motor so that a position of the driven object is changed, a deceleration portion for decreasing the target number of rotations of the motor every calculation cycle after the target number of rotations reaches the upper limit number of rotations, and a main control portion for controlling a drive of the motor on the basis of the target number of rotations.

Motor control device and seat control device for vehicle

A motor control device, which includes a main control portion configured to actuate a motor, which displaces a driven object between a first position and a second position in an acceleration control mode in which a rotation speed of the motor gradually increases, in a deceleration control mode in which the rotation speed of the motor gradually decreases, and in a constant speed control mode in which the rotation speed of the motor is maintained at a constant level, and a displacement interference detection portion detecting that the displacement of the driven object is interfered using an actual rotation speed, which is the actual rotation speed of the motor, and an ideal rotation speed of the motor, on which a control result by the main control portion including a feedback control is reflected.

An automatic transmission including plural friction engaging elements configures plural shift ranges based on combinations of each friction engaging element being in engaging or disengaging condition and a controlling unit for controlling the friction engaging elements to be in engaging or disengaging condition by controlling a hydraulic pressure applied.

Control apparatus of automatic transmission

A control apparatus for controlling a shift operation in an automatic transmission includes a disengaging side controlling device for performing a feedback control so as to substantially match a slip amount calculated by a slip amount calculating device with a target slip amount calculated by a target slip amount calculating device when the calculated slip amount is judged to be in excess of the predetermined threshold value by a judging device. The target slip amount varies from a predetermined threshold value to a predetermined target value drawing an ideal trace for restraining a shift shock and is maintained at the predetermined target value. The control apparatus further includes an engaging side controlling device for increasing a torque to be transmitted to an on-coming friction engagement element in association with commencement of the feedback control.

Control apparatus for controlling a shift operation in an automatic transmission

According to an aspect of the present invention, an automatic transmission includes plural friction engaging elements configures plural shift ranges based on combinations of each friction engaging element being in engaging or disengaging condition, a controlling unit for controlling the friction engaging elements to be in engaging or disengaging condition by controlling a hydraulic pressure applied.

A control apparatus for controlling a shift operation sets an output Mout from a reference model M(s), which is ideally changed, as a target slip amount of a feedback controller Cpi(s). The controller Cpi(s) controls torque transmitted to an off-going friction engagement element for matching a control slip amount sp with the target slip amount. The characteristics of the controller Cpi(s) is determined for optimally performing a clutch-to-clutch shift operation during a lock-up clutch being engaged. When the lock-up clutch has been disengaged, an input shaft rotation speed is filtered by a notch filter NF for removing a frequency component in a predetermined frequency domain, wherein the control slip amount sp is obtained based upon the filtered input shaft rotation speed.

A hydraulic pressure control device for an automatic transmission is adapted to smoothly change the slip amount of the automatic transmission when a clutch to clutch shift control is performed. The hydraulic pressure control device uses a reference model showing a behavior with an output corresponding to a predetermined slip amount which smoothly varies over time with respect to a target slip amount which varies in a stepped manner. The hydraulic pressure is applied to a release side frictional engagement element using a controller C (s) which shows a behavior such that the controller C (s) and a controlled object P(s) are collaborated to correspond to the reference model. The controller C (s) and the controlled object P(s) have the hydraulic pressure applied to the release side frictional engagement element of the automatic transmission as an input and the slip amount of the automatic transmission as an output.

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Aichi-ken, Japan

Akira Aikawa