Aisin-Warner Limited

Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Aisin-Warner Kabushiki Kaisha

Toyota Motor Corporation

Kabushiki Kaisha Shinsangyokaihatsu

Aisin-Warner K.k.

Koji Kobayashi

Koji Sumiya

Kazuaki Watanabe

Yutaka Taga

Seitoku Kubo

Shuzo Moroto

Shoji Yokoyama

Masao Kawai

Takenori Kano

Haruki Takemoto

Keizo Kobayashi

A first external storage device which may be a CD stores data representing standard map of a particular area and that required for guidance, and a second external storage device which may be an IC card stores individual data which cannot be complemented by said data representing the standard map and said guidance data. Since the data is stored in both CD and IC card, the number of data can be reduced. This makes the operation simpler and enables a data that meets the demand of a user to be selectively supplied to the user. In consequence, guided navigation is made possible from any starting point to a destination, and data updating can be made relatively easy.

Navigation system

Described herein is a hydraulic servo for a friction coupling element of an automatic transmission, which is mounted in association with a one-way clutch and which has reduced dimensions in radial and axial directions. The hydraulic servo essentially comprises: an annular drum splined with a sleeve portion of the inner race of the one-way clutch and arranged to receive the reaction of the one-way clutch by a fixed member in the automatic transmission case; a piston fitted in the annular drum; and a return spring mounted in the drum for returning the piston.

Hydraulic servo for friction coupling element of automatic transmission

A hydraulic servo for friction coupling devices of automatic transmissions, the hydraulic servo comprising: an annular drum including outer and inner cylinders and a side wall connecting the two cylinders together and mounted fixedly or rotatably within an automatic transmission case; an intermediate cylinder mounted concentrically in a predetermined position between the outer and inner cylinders of the drum; a return biasing means located between the intermediate and inner cylinders; and a connecting member securely connecting the return biasing means to a piston.

Hydraulic servo for friction coupling devices of automatic transmissions

A support mechanism for friction coupling devices in an automatic transmission is disclosed. A snap ring is mounted on a stationary or rotational member in an automatic transmission case and adapted to receive the operational load of one friction coupling device through an annular plate member. A stepped portion is formed on the stationary or rotational member and adapted to receive the operational load of another friction coupling device through the annular plate member.

Friction coupling element of automatic transmission

A support for an automatic transmission. The support has a tubular supporting portion having an inner peripheral surface supporting a transmission shaft and an outer peripheral surface supporting an inner cylindrical portion of a hydraulic servo drum of the transmission. The support has working oil passages formed therein and adapted for supplying and discharging a working oil to and from the hydraulic servo drum. The support has a support body including a first oil passage leading from an oil pressure controller for supplying and discharging working oil and communicating with the inner periphery of the tubular supporting portion, a second oil passage providing a communication between the outer periphery and the inner periphery of the tubular supporting portion and an inner oil groove providing a communication between inner peripheral openings of the first and second oil passages. The support further has an inner sleeve fitting on the inner peripheral surface of the tubular supporting portion to cover the oil groove thereby forming an oil passage for working oil, and an outer sleeve fitting on the outer periphery of the tubular supporting portion, the outer sleeve being provided with a sleeve hole aligned with a working oil port formed in the inner cylindrical portion of the hydraulic servo drum and communicating with an outer peripheral opening of the second oil passage. The outer sleeve is further provided in the outer peripheral surface thereof with ring grooves formed at both sides of the sleeve hole and adapted to receive seal rings.

Support for transmission shaft and hydraulic servo drum

The automatic transmission comprises a torque converter having a pump, a turbine, a stator and a direct-coupling clutch adapted to engage the pump with the transmission casing, and a transmission gear having multiple forward gears and a reverse gear. A lockup control valve comprising a spool on which a governor pressure and the force of a spring act oppositely, and a switch valve adapted to change-over the oil-hydraulic circuits for the release or the engagement of the direct-coupling clutch, are provided for the oil-hydraulic control circuit of the automatic transmission. The direct-coupling clutch can become engaged only if the governor pressure should exceed a predetermined pressure and the transmission be in a select high speed range.

Direct-coupling clutch control system for an automatic transmission

An automatic four-wheel drive transfer case according to this invention comprises a differential gear connected to the output shaft of a transmission, said differential gear having first and second side gears and a casing, a clutch arranged coaxially with the output shaft for releasably engaging the casing of the differential gear with the side gears thereof, the first side gear being connected with a rearwheel drive output shaft which is arranged on the extension of the output shaft of the transmission, the second side gear being connected with an intermediate shaft arranged coaxially with the output shaft of the transmission, a selective gearing for selectively engaging the second side gear with a front-wheel drive output shaft to change over between two-wheel drive and four-wheel drive, and a clutch control which receives a signal indicating the position of the selective gearing and signals representing the revolution speed of the front-wheel drive output shaft and/or the rear-wheel drive output shaft so as to selectively control the operation of the clutch, whereby the clutch control engages the clutch in two-wheel drive, and in four-wheel drive it engages the clutch when the vehicle speed is below a predetermined level or when the difference in the revolution speed between the front- and rear-wheel drive output shafts is greater than a predetermined value.

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Toyota, Japan

Koji Kobayashi