Mazda Motor Corporation

Jms Co., Ltd.

Satoru Hashimoto

Kenji Sawa

Shinya Kamada

Tatsuhiko Iwasaki

Koichi Yamamoto

Takamichi Teraoka

Tomoo Sawazaki

Yasunori Kanda

Akinobu Aoki

Hiroshi Shinozuka

Takeyoshi Kawa

Shin Nakano

Naotaka Hirami

Masakazu Hombo

Kazushi Kurokawa

Ryoji Fujii

Shigeru Nagayama

Keiji Bota

Takahiro Kimura

Yasuo Shigenaka

Mitsukazu Tasaka

Kazuo Sasaki

Yasunari Nakayama

Mitsutoshi Abe

Fumiaki Baba

Akihiro Mitani

Keiichiro Sueshige

Mitsuo Yasuno

Raita Uematsu

Yoshinori Fukumoto

Yusuke Moriyama

Hajime Yamane

Susumu Kuromida

Daisuke Shishido

Masanori Izumi

Susumu Kurumida

A control device for an automatic transmission includes a parking lock mechanism configured to lock/unlock rotation of a power transmission shaft by setting a parking rod at locked/unlocked position when the automatic transmission is in a parking range or in other ranges, a parking drive mechanism configured to set the parking rod at the unlocked position by supplying hydraulic pressure, a hydraulic pressure control valve configured to intercept the hydraulic pressure supply to the parking drive mechanism when power is supplied thereto, and supply the pressure when power is not supplied thereto, a regulating mechanism configured to regulate the movement of the parking rod at the locked position, and a controller configured to, when the parking rod is at the locked position, maintain supply of power to the valve, while an engine speed is higher than a given value, after power of a vehicle is turned OFF.

Control device for automatic transmission

A range determination device is applied to an automatic transmission provided with an input portion, an output portion, and a range switching mechanism which transmits rotation of the input portion to the output portion, and which is operative to switch the range of the automatic transmission between a forward range and a reverse range, in which directions of transmitting rotation from the input portion to the output portion are different from each other. The range determination device includes a rotational state detection unit which detects a rotational state of a predetermined rotary member included in the range switching mechanism, and a determination unit which determines that the forward range or the reverse range is attained on the basis of the rotational state of the rotary member detected by the rotational state detection unit.

Range determination device for automatic transmission

The medical needle device includes: a shieldincluding a substantially cylindrical portion; a tube; a first hubthat is inserted into an inner bore of the shield movably in an axial direction. The rear end of the first hubis connected with the tube. A rigid needleis fixed to a front end portion of the first hub; and a hub movement controlling memberthat is attached to the shield detachably. The hub movement controlling memberincludes: a stopper portionthat can be inserted from the rear end side of the shield into an inner bore of the shield exsertably.

Winged medical needle device

The present invention provides an automatic transmission control apparatus which comprises a first temperature detection device for detecting a temperature of hydraulic oil stored in an automatic transmission; an automatic transmission control device installed in a same casing as that in which the hydraulic oil is stored; a second temperature detection device for detecting a temperature of the automatic transmission control device; and a malfunction determination section for comparing the temperature of the automatic transmission control device detected by the second temperature detection device with the temperature of the hydraulic oil detected by the first temperature detection device to determine whether or not a malfunction occurs in the first temperature detection device.

Automatic transmission control apparatus

A fluid control device is characterized in that the device is structured of a hollow first fluid path () and second fluid path (), a housing portion () formed between the first fluid path and the second fluid path and having a hollow portion with a cross-sectional area larger than cross-sectional areas of both fluid paths, and a valve member () that has a main body () and a projection portion () that are installed in an opening portion where the first fluid path is connected to the hollow portion and that is formed of an elastic material. The fluid control device enables the circulation of liquid when the pressure of liquid flowing from the first fluid path toward the second fluid path is more than a predetermined level. The fluid control device enables accurate and safe measurement of pressure including blood pressure, and, when flushing operation of an infusion circuit etc. is finished, the device enables speedy lowering of pressure to a value that accurately reflects blood pressure of a patient and enables obtaining of a necessary flow rate in a region where pressure is relatively low.

Fluid control device

There is provided temporary high-speed gear setting means which causes an automatic transmission to accomplish first-speed gear after it has once been set to second speed gear, for instance, which is selected as a specific high-speed gear upon switching from a non-drive range to the drive range. While it is made possible to manually switch between gear-shifting control operation in automatic mode performed according to preset shifting characteristics and manual mode in which gear-shifting operation is manually performed by a driver, priority is given to accomplishment of the first-speed gear the temporary high-speed gear setting means when the automatic transmission is switched to the manual mode while it is set to the aforementioned specific high-speed gear by the aforementioned temporary high-speed gear setting means.

Controller for automatic transmission

An automatic transmission control system provided with a speed sensor for monitoring an input speed to the automatic transmission, on one hand, prohibits gear shifts only to gears which are provided by alternately locking and unlocking two friction coupling elements at a timing determined essentially based on an input speed when an failure of the speed sensor occurs and, on the other hand, permits gear shifts to gears which are provided in participation of the one-way clutch by alternately locking and unlocking the two friction coupling elements, a timely alternate lock and unlock operation of the two friction coupling elements being spontaneously caused by the unlock operation of one of the two friction coupling elements and gear shifts to gears which are provided by locking one of the two friction coupling elements and unlocking the other with common pressure or unlocking one of the two friction coupling elements and locking the other with common pressure.

Automatic transmission control system

A gear shift failure of an automatic transmission to a wrong gear other than an indented gear is made by estimating slippage theoretically caused in a torque converter on the basis of an engine speed and a turbine speed theoretically determined for an intended gear according to the vehicle speed and comparing the estimating slippage with predetermined reference slippage. When the estimated slippage exceeds the predetermined threshold slippage, it is decided that there has occurred a wrong shift to a gear other than the intended gear.

Method of and system for deciding failures of automatic transmission

An apparatus for controlling an automatic transmission is disclosed. A 2nd speed is established in which hydraulic pressure is supplied only into an engaging chamber of a 2-4 brake by a first duty solenoid valve so that the brake is applied. A 3rd speed is established in which the hydraulic pressure is supplied into a releasing chamber of the brake and a hydraulic chamber of a 3-4 clutch by a second duty solenoid valve under the condition of the hydraulic pressure being supplied into the engaging chamber of the brake so that the brake is released and the 3-4 clutch is engaged. When the 2nd speed is changed to the 3rd speed, a controller increases the hydraulic pressure supplied into the releasing chamber of the brake and the hydraulic chamber of the 3-4 clutch in a case where a failure, in which the first solenoid valve is fixed under a condition that the first solenoid valve supplies the hydraulic pressure into the engaging chamber, is detected.

Apparatus for controlling automatic transmission

An automatic transmission control system for an automotive automatic transmission including a speed sensor for detecting a vehicle speed of the vehicle, a load sensor for detecting a load acting on the driving torque generator, a torque sensor for detecting input torque transmitted to the automatic transmission from the driving torque generator, first working fluid pressure control communicating both a first friction coupling element's unlocking pressure chamber and a second friction coupling element's pressure chamber with the working fluid source in the hydraulic pressure control system for controlling supply of working fluid pressure to and from both the unlocking pressure chambers and a second working fluid pressure control in the fluid path communicating both the first friction coupling element's locking pressure chamber with the working fluid source for controlling supply of working fluid pressure to and from the first friction coupling element's locking pressure chamber. Thereby controlling the second working fluid pressure control such that, until a start of a substantial gear shift period of time from an appearance of the specific gear shift command signal, the level of the working fluid pressure supplied to the locking pressure chamber of the first friction coupling element being directly related to a level of the working fluid pressure supplied to the locking pressure chamber of the first friction coupling element during the substantial gear shift period of time.

Automatic transmission control system for automobiles

An automatic transmission control system for an automatic transmission including a hydraulic pressure control circuit which supplies locking and unlocking pressures selectively to a plurality of friction coupling elements to lock and unlock the selected friction coupling elements, changing a torque transmission path in a transmission gear mechanism to provide available gears, a specific one of which is achieved by locking and unlocking simultaneously specific friction coupling elements.

A torque responsive hydraulic control system for an automatic transmission with a plurality of hydraulically actuated friction control elements. A working hydraulic pressure in the elements is controlled during shifting such that a pressure in a first element is removed after a specific state of the element is achieved. The removal being responsive to the torque of an input shaft of the transmission, the expiration of a specific time period, or a position of the throttle valve of a driving engine.

An automatic transmission control system, which includes a 2-4 brake having a servo apply fluid chamber and a servo release fluid chamber and a 3-4 clutch having a fluid chamber and causes a 3-2 shift by engaging the 2-4 brake and disengaging the 3-4 clutch, controls engaging pressure for the 3-4 clutch by way of controlling servo apply pressure for the 2-4 brake to disengage the 3-4 brake so as thereby to increase turbine speed during the 3-2 gear shift and, at near the end of the 3-2 gear shift, brings the 2-4 brake into engagement. During control of disengagement of the 3-4 clutch, the pressure difference between servo apply pressure and servo release pressure is changed to become greater at the beginning of the gear shift.

An automatic transmission control system including a hydraulic pressure control circuit which supplied locking and unlocking pressure to selectively lock and unlock the selected friction coupling elements so as to change a torque transmission path in the transmission gear mechanism and thereby to provide desired gears, a specific one of which is achieved by locking and unlocking simultaneously specific friction coupling elements.

Growing community of inventors

Hiroshima, Japan

Kenji Sawa