Toyota Jidosha Kabushiki Kaisha

Other

Aisin Aw Co., Ltd.

Kazuyuki Watanabe

Hiromichi Kimura

Atsushi Ayabe

Toshimitsu Sato

Naoyuki Sakamoto

Hideaki Ogasawara

Mitsuhiro Nakamura

Noboru Shibata

Kazuaki Nakamura

Shinji Kato

Hirofumi Fujita

Yasuo Hojo

Mikio Iwase

Kazuhisa Ozaki

Naoyuki Fukaya

Koichi Tanaka

Yoshihiro Iijima

Koji Oshima

Masahiro Itou

Shigeki Hiramatsu

Terufumi Miyazaki

Toshio Sugimura

Mitsuzo Shida

Masaru Morise

Akimasa Nanba

Hirofumi Onishi

Takuya Ito

Takaharu Fukaya

Keizo Kobayashi

Takeshi Ishiwada

Makoto Nakayashiki

Daisuke Kusamoto

Mamoru Kurosawa

Norihiro Tomioka

Kouichi Yamamoto

Masanori Kikuchi

Takashi Kuno

Akiko Matsuo

Mikio Shimadue

The invention provides a power train mechanism capable of decreasing a rotational resistance. The power train mechanism includes: a clutch drum; a forced feed oil passage and a central oil passage for supplying oil to the clutch drum; an oil reservoir provided below the clutch drum; an outer circumferential surface surrounding member for surrounding an outer circumferential surface of the clutch drum, while facing the outer circumferential surface with a clearance therebetween to such a degree as to avoid contact with the outer circumferential surface during rotation of the outer circumferential surface of the clutch drum; and a trans-axle rear cover provided continuously to the outer circumferential surface surrounding member, for surrounding axial one end surface of the clutch drum, in which a side of the outer circumferential surface surrounding member axially opposite to the trans-axle rear cover is an open end.

Power train mechanism including a surrounding member

An oil suction device for an automatic transmission includes: an oil pan that receives oil supplied to various portions of the automatic transmission and returned to the oil pan and reserves the received oil therein; an oil strainer located over the oil pan; a suction port drawing in the oil reserved in the oil pan; and an elastic wall provided selectively between a portion of the oil pan that receives a relatively small amount of the oil returned to the oil pan and the suction port, the elastic wall extending from a bottom surface of the oil pan and reaching a lower surface of the oil strainer to interrupt a flow of oil.

Oil suction device for automatic transmission

A control system of a vehicle including an engine and an automatic transmission operable to form one of a plurality of gear positions set according to running conditions of the vehicle, and a method of controlling the vehicle are provided. In the control, the rotational speed of an input-side rotary shaft of a shifting mechanism of the transmission is detected, and the vehicle is controlled so that, when an execution condition that one of the gear positions set according to the running conditions is maintained and the rotational speed of the input-side rotary shaft has increased to be higher than a rotational speed corresponding to the set gear position is satisfied, the vehicle is brought into running conditions that will eliminate a state in which air is present in the hydraulic fluid supplied from an oil supply device.

Vehicle control system and method of controlling vehicle

An ECU executes a program including causing a brake to enter an engaged state, when a 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.

Control apparatus for automatic transmission

An ECU executes a program including outputting, when the oil temperature THO of ATF&#x3c;the threshold value THO (0), a control signal to the solenoid valve to control the solenoid valve to cause the lock-up relay valve to enter the state of resupplying the ATF discharged from the torque converter to the torque converter. In the state where the ATF discharged from the torque converter is being resupplied to the torque converter, the second oil path guiding the ATF discharged from the torque converter to the oil pan is disconnected from the torque converter.

Fluid supply device and fluid supply method of fluid coupling

A lubrication structure of a transmission includes a gear chamber having an internal space storing lubricating oil, in which chamber a pressure is raised to a prescribed pressure, a gear chamber having an internal space communicating to the internal space through a communicating hole and attaining a pressure lower than the prescribed pressure, and an oil catch tank provided in the internal space at a position directly under the communicating hole and receiving the lubricating oil that flows into the internal space from the internal space through the communicating hole. With such a structure, a lubrication structure for a transmission capable of holding an oil level at a proper level with a simplified structure can be provided.

Lubrication structure for transmission

An embodiment of a differential device of the present invention comprises a pair of side gears and a pair of pinion gears housed inside a differential case, with the pinion gears supported by a pinion shaft fixed to the differential case at axial end sections thereof so as to be capable of sliding freely thereabout. Lubricating oil channels are provided that pass through each of the end sections of the pinion shaft in the axial direction thereof. One end of each lubricating oil channel opens to the exterior of the differential case at a shaft-end corner section of the pinion shaft corresponding to an upstream side thereof in a direction of rotation of the differential case, and another end opens to a sliding surface of the pinion shaft with respect to one of the pinion gears. The differential device also comprises a mechanism for providing lubricating oil to the lubricating oil channels upon rotation of the differential case.

Differential device

When a traveling state is in an engagement range of a lock-up clutch, an ECU executes a program including a step of executing slip control if preconditions are satisfied and learning start conditions are satisfied, a step of updating a learning value if an output value is not greater than an FF control value+&#x3b1; or not smaller than the FF control value+&#x3b2;, and a step of engaging the lock-up clutch.

Control apparatus for vehicle

The temperature of a friction engagement device of an automatic transmission is estimated, and the target speed ratio of a torque converter increases as the estimated temperature of the friction engagement device increases. The engagement load of the friction engagement device is then controlled so as to achieve the increased target speed ratio of the torque converter.

Neutral control apparatus and method for a vehicle with an automatic transmission

A navigation apparatus and arrival detection method detect a current location of a vehicle and searches for a route to a set destination. The apparatus and method provide guidance to the destination along the searched route and determine whether the destination is set within a car-free area. If it is determined that the destination is set within the car-free area, the apparatus and method expand an arrival detection area for the destination, and terminate the guidance to the destination when it is determined that the vehicle is within the expanded arrival detection area. Alternatively, even if the destination is not within a car-free area, after an engine of a vehicle is shut off and restarts, the navigation apparatus and method expand an arrival detection area for the destination, and terminate the guidance to the destination when the vehicle is within the expanded arrival detection area.

Navigation apparatus and arrival detection method

In a friction engagement device of an automatic transmission, a brake piston is actuated by an oil pressure and a friction disc is pressed by the brake piston. The friction engagement device of an automatic transmission includes an oil pressure chamber extending in an annular shape and a main oil pressure supply path and a secondary oil pressure supply path each extending separately to supply oil to the oil pressure chamber. Each of the main oil pressure supply path and secondary oil pressure supply path connects to the oil pressure chamber in a position different from each other in a circumferential direction of the oil pressure chamber. With a construction as such, a friction engagement device of an automatic transmission is provided which prevents a load to the friction disc from locally increasing and attains a smooth speed-changing operation.

Friction engagement device of automatic transmission

A shift control apparatus of an automatic transmission of a motor vehicle to which torque is transmitted from an engine via a fluid coupling device is provided. In the automatic transmission including a plurality of hydraulically operated friction elements, a clutch-to-clutch downshift is carried out during coasting of the vehicle by releasing one of the friction elements and engaging another friction element. A controller of the shift control apparatus detects a difference between input and output rotation speeds of the fluid coupling device, and increases an engine speed by a controlled amount based on the difference between the input and output rotation speeds when the clutch-to-clutch downshift is carried out during coasting of the vehicle, so that the vehicle is brought into a minimal driving state in which the engine speed is slightly higher than the output rotation speed of the fluid coupling device.

Shift control apparatus of automatic transmission of motor vehicle

In a shift control system of an automatic transmission for a vehicle, an engaging torque applied to a predetermined friction element that has been engaged to establish a predetermined gear stage of the automatic transmission during running of the vehicle is gradually decreased to generate a slip in the predetermined friction element. Based on the engagigng torque of the friction element and a command value output to generate the engaging torque to the friction element, a predetermined relationship used for determining the command value for generating a required engaging torque is corrected. Learning quality or accuracy with respect to the predetermined relationship between the engaging torque of the friction element and the control value for generating the engaging torque may be sufficiently ensured.

Shift control system of automatic transmission for vehicle and shift control method thereof

A duty ratio for controlling an engagement force of a friction engagement device on the side of upshift engagement is corrected by an amount corresponding to an intermediate correction control value in the course of the shift. In addition, on a prerequisite condition that learning correction of a constant standby pressure control value at the start of the shift is converged, learning correction is performed for the intermediate correction control value according to a gradient of a turbine speed. Thus, a shift shock is prevented from occurring due to abrupt engagement of the friction engagement device and the like at the completion of the shift.

Vehicle shift control device and control method therefor

Control device and control method for a vehicular automatic transmission

Growing community of inventors

Anjo, Japan

Kazuyuki Watanabe