| Patent Number |
Title Of Patent |
Date Issued |
| 4944376 |
Brake band drum for planetary gear-type transmissions |
July 31, 1990 |
| A brake band drum for a planetary gear-type automatic transmission in which a clutch is formed inside a press-manufactured planetary gear input member coupled to a press-manufactured clutch cylinder and one member of a planetary gear mechanism, and a band brake is arranged on the outer |
| 4942782 |
Reverse shift control device on automatic transmission |
July 24, 1990 |
| A reverse shift control device of an automatic transmission prevents reverse running of the automatic transmission, even though a manual shift lever is set to a reverse range, when the vehicle runs at more than a predetermined speed. Certain shift valves have ports to which line pres |
| 4941096 |
Electronically controlled automatic transmission |
July 10, 1990 |
| If a driver wishes to start off an automotive vehicle in second or third gear when the vehicle is at rest on a road surface having a low coefficient of friction, as is the case when a road surface is covered with snow, the driver operates a winter mode selection switch while the tran |
| 4934215 |
Automatic transmission |
June 19, 1990 |
| An automatic transmission comprising a single planetary gear unit and a dual planetary gear unit has an output member located in its center so that the output member encloses an input shaft.In the case of a three speed automatic transmission mechanism, a first clutch located around a rin |
| 4926346 |
Road image input system for vehicle control |
May 15, 1990 |
| A road image input system for controlling an automotive vehicle includes a pick-up mounted on the vehicle for picking up the image of a road ahead of the traveling vehicle, a sensor for sensing the traveling condition of the vehicle, and an image processor for obtaining information indic |
| 4922765 |
Lubricating structure for transmission mechanism |
May 8, 1990 |
| A lubrication system is provided for a transmission mechanism supported on input and output shafts, and a chain drive rotatably connects these shafts. The chain and drive elements on the shafts are provided with a casing for isolating the mechanism, which collects an oil bath within the |
| 4918606 |
Automatic transmission with fail-safe function |
April 17, 1990 |
| A rate of change in vehicle velocity is calculated by comparing a present vehicle velocity signal and an immediately preceding vehicle velocity signal. If the rate of change in vehicle velocity is greater than a rate of change capable of being produced by actual traveling of the vehicle, |
| 4916977 |
Automatic transmission |
April 17, 1990 |
| Automatic transmission including a main-transmission-mechanism consisting of two planetary gear units (three speed or four speed transmission mechanism for example) and a sub-transmission-mechanism consisting of one planetary gear unit (underdrive mechanism, for example). One speed and t |
| 4914978 |
Automatic transmission |
April 10, 1990 |
| An automatic transmission has a main transmission mechanism having two planetary gear units made on a first axle, and a sub transmission mechanism having two planetary gear units made on a second axle; the main transmission mechanism having a single planetary gear unit and dual plane |
| 4912639 |
Four-wheel drive vehicle having front-and rear-wheel engaging mechanism |
March 27, 1990 |
| A four-wheel drive vehicle having a front- and rear-wheel engaging mechanism designed to enable differential limiting means provided between the front and rear wheels to be controlled over the range from the direct coupling position to the disengaged position through the slip region by |
| 4903550 |
Hydraulic control device for automatic transmission |
February 27, 1990 |
| A hydraulic control device for an automatic transmission, having a gear ratio different from that of usual D range by a manual shift down from the D range to range 3 or 2, is mounted on an automobile. A first solenoid valve, a first shift valve and a second shift valve are connected so t |
| 4899621 |
Automatic transmission for vehicles |
February 13, 1990 |
| An automatic transmission for motor vehicles, including a first shaft rotatably supported by the automatic transmission case and consisting of an input shaft coupled with the engine output shaft through a joint like a fluid joint or a friction clutch and an output shaft disposed in serie |
| 4899278 |
Automatic transmission with erroneous shift preventing function |
February 6, 1990 |
| In accordance with the invention, as shown, for example, in FIG. 1, when a second counter 14 attains a number of pulses n needed for period measurement, the time required for n pulses to enter is obtained from a second memory 16, which stores the time that prevailed n pulses ago, and a |
| 4895236 |
Actuator for the frictional engaging device |
January 23, 1990 |
| An actuator for a four wheel drive transfer mechanism which is laid in a power transmission device and is controlled by an electrical signal sent from a controlling unit comprises a torque generating mechanism which converts electrical energy into a torque, and a torque-thrust conversion |
| 4892011 |
Planetary gear mechanism on an automatic transmission |
January 9, 1990 |
| In a dual planetary gear of an automatic transmission, tooth surface pressure generated at a relatively short pinion is decreased and distributed since the pinion is formed as a pair of pinions. These pinions can be pinions which mesh with a sun gear or pinions which mesh with a ring |
| 4889016 |
Hydraulic servo regulating systems in an automatic transmission |
December 26, 1989 |
| A hydraulic servo regulating device of an automatic transmission, which according to the present invention applies enough line pressure quickly to a hydraulic servo and obviates a delay when the line pressure is to be drained, is disposed in an oil path between a shift valve and an a |
| 4884472 |
Automatic transmission |
December 5, 1989 |
| An automatic transmission having Ravigneaux Type planetary gear unit comprises a first and a second sun gear, a long pinion meshing the first sun gear, a short pinion meashing the long pinion and the second sun gear, a carrier supporting the long pinion and the short pinion and a ring ge |
| 4880090 |
Hydraulic controlling system for lockup clutches |
November 14, 1989 |
| A lockup control valve is provided to control the discharge from the lockup clutch during clutch engagement and a solenoid valve to supply the control pressure to the lockup control valve. The aforesaid lockup control valve has a face on which the oil supply pressure acts during lockup c |
| 4875392 |
Manual valve in an automatic transmission |
October 24, 1989 |
| A manual valve which is used for an automatic transmission is designed to be shortened axially.A port for reverse running and the ports for forward running are made on the same axial direction against ports for the port for line pressure application.A spool has; a first oil chamber which |
| 4870581 |
Electronically controlled automatic transmission |
September 26, 1989 |
| A sensed shift time and a standard value of shift time set for this shift are compared. If the result of the comparison is that the shift time does not fall within an allowable range of standard values, a signal outputted to a linear solenoid is varied in such a manner that the shift tim |
| 4866935 |
Hydraulic torque converter |
September 19, 1989 |
| In a hydraulic torque converter having a torus of flatness ratio (L/H) within the range 0.82-0.9, the outer and inner contours of the turbine in a meridional plane through the axis of the turbine each comprises a combination of a plurality of circular arcs, wherein the ratios between |
| 4866625 |
Four-wheel drive vehicle having antislip apparatus |
September 12, 1989 |
| A four-wheel drive vehicle having a front- and rear-wheel engaging mechanism designed to enable differential limiting means provided between the front and rear wheels to be controlled over the range from the direct coupling position to the disengaged position through the slip region by |
| 4864889 |
Continuously variable transmission |
September 12, 1989 |
| A belt driven continuously variable transmission unit which converts the rotation of the input member by continuously variable ratios, and a gear unit such as a planetary gear unit to which the output torque from said continuously variable transmission unit and torque from said input mem |
| 4862768 |
Limiting/switching device for four wheel drive vehicle |
September 5, 1989 |
| Provided is a power transmission device for four-wheel drive vehicles of both the full-time type and part-time types, wherein a wet multiple-disc clutch is mounted in a ring gear covering the front-wheel differential gear and arranged coaxially with the differential gear. The wet mul |
| 4858500 |
Apparatus for controlling lock-up clutch in automatic transmission system having main transmissi |
August 22, 1989 |
| A transmission control device according to the present invention comprises a main transmission having a torque converting device provided with a direct clutch for effecting engagement and disengagement of the input member with output member of a torque converting portion; a sub trans |
| 4858499 |
Automatic transmission with lock-up clutch |
August 22, 1989 |
| In an automatic transmission equipped with a lock-up clutch (6) capable of transmitting engine power to the automatic transmission (1) directly or via a torque converter (2), the automatic transmission has sensors (11, 12) for detecting an input rotational speed and an output rotational |
| 4850251 |
Hydraulic control device for automatic transmission |
July 25, 1989 |
| A hydraulic control device of an automatic transmission for a vehicle utilizes a shift valve for shifting at a high speed stage to prevent creeping and provide a hill-stop mechanism. The shift valve for shifting at the high speed stage has a port open to a forward clutch hydraulic se |
| 4848177 |
Automatic transmission |
July 18, 1989 |
| An automatic transmission having a one-way brake in which an outer race is fixed to a rotational member of a planetary gear unit or to a transaxle case and, conversely, an inner race is fixed to the transaxle case or the rotational member of the planetary gear unit, characterized in that |
| 4841804 |
Automatic transmission for motor vehicles |
June 27, 1989 |
| An automatic transmission for F.F. (front engine-front drive) type motor vehicles, in which a hydraulic torque converter and an auxiliary transmission mechanism are successively coupled with an output shaft of a transversely mounted internal combustion engine with its rotational axis |
| 4841445 |
Electronically controlled automatic transmission |
June 20, 1989 |
| In accordance with the invention, the mounting position of a throttle opening sensor is adjusted in such a manner that the output voltage of the sensor attains a value a value of V.sub.100 at a throttle opening of 100%. When execution of the system program starts, V.sub.0 is stored in me |
| 4840092 |
Hydraulic control device for automatic transmissions |
June 20, 1989 |
| A selecting valve is provided, which is switched by different signals sent out when the vehicle is stopped or when the vehicle is to start to move. The selecting valve is connected to a hydraulic servo unit for a forward clutch which is engaged to transmit torque when the vehicle is to m |
| 4839041 |
Magnetic oil strainer |
June 13, 1989 |
| A strainer is mounted in an oil passage within a valve body constituting the hydraulic control unit of an automatic transmission. The strainer includes a frame (4) fitted into the oil passage, a reticulate member (5) secured to the frame (4) so as to form a barrier across the oil passage |
| 4838844 |
Endless transmission belt |
June 13, 1989 |
| An endless transmission belt is formed of a plurality of symmetrical V blocks. Each V block comprises upper and lower portions disposed approximately parallel to each other, and two pillar portions connecting the upper and lower portions. The block includes side openings on both side |
| 4829853 |
Hydraulic control system for automatic transmission |
May 16, 1989 |
| Under idle condition of a vehicle, control valve 90 is "left half position", line pressure modulated by throttle valve 41 is applied to clutch hydraulic servo C.sub.1 through ports .delta., .mu.; and the clutch is held just under connection, line pressure is applied to brake hydraulic |
| 4827807 |
Hydraulic control system for four-wheel drive torque transfer mechanism for vehicle |
May 9, 1989 |
| A hydraulic control system for a four-wheel drive torque transfer mechanism for a vehicle, including an automatic transmission, a transfer mechanism having gear positions of a two-wheel drive direct-coupling mode H.sub.2, a four-wheel drive direct-coupling mode H.sub.4 and a reduced-spee |
| 4823648 |
Hydraulic control system for four-wheel drive torque tranfer mechanism for vehicle |
April 25, 1989 |
| A hydraulic control system for a four-wheel drive torque transfer mechanism for a vehicle, including an automatic transmission, a transfer mechanism having a two-wheel drive direct-coupling gear (H.sub.2), a four-wheel drive direct-coupling gear (H.sub.4) and a reduced-speed four-wheel d |
| 4822323 |
Endless transmission belt |
April 18, 1989 |
| An endless transmission belt for transmitting torque between a pair of pulleys including a plurality of pairs of first and second metallic blocks having at least one through holes in alignment with recesses formed in opposite inclined side edges of the block and an endless chain belt for |
| 4813301 |
Automatic transmission |
March 21, 1989 |
| In an automatic transmission including a torque converter, the transmission mechanism is capable of performing lock-up function. The input side portion of a first clutch is coupled with the turbine of the torque converter, wherein the first clutch is in connection while the automatic |
| 4790211 |
Power transmission device for four wheel drive vehicle having an improved differential motion li |
December 13, 1988 |
| A power transmission device for a full-time four wheel drive vehicle has a differential motion limiting device composed of a hydraulic frictional clutch such as a wet multiple disc type clutch. The friction clutch is disposed between a diff-carrier constituting a front wheel differential |
| 4787494 |
Hydraulic operating unit of friction engaging apparatus for transmissions |
November 29, 1988 |
| A hydraulic operating unit for the friction engaging apparatus of a transmission provides a hydraulic operating unit which permits the introduction of a low-pressure working fluid to permit the forceable disengagement of the hydraulic operation unit to work against the fluid which wo |
| 4785690 |
Pressure regulating system for use in an automatic transmission |
November 22, 1988 |
| Pressure regulating system for use in an automatic transmission including a fluid coupling, a belt drive continuously-variable speed transmission mechanism having an input pulley and an output pulley which are rotatably interlocked with a V-belt and a reduction ratio control system for |
| 4776240 |
Automatic transmission |
October 11, 1988 |
| An automatic transmission comprising a fluid torque converter; a transmission gear comprising a first gear unit having three forward-speed gears and one reverse gear and a second gear unit having a high-speed gear and a low-speed gear; and a hydraulic control system comprising first and |
| 4767925 |
Optical type relative rotation measurement apparatus |
August 30, 1988 |
| An optical rotary encoder is provided with a pair of corrective light-emitting and light-receiving elements in addition to a pair of light-emitting and light-receiving elements that are for producing an output in dependence upon the relative rotation of two slitted disks. A correctiv |
| 4753627 |
Hydraulic control system for a belt drive continuously-variable speed transmission |
June 28, 1988 |
| A hydraulic control system for a belt drive continuously-variable speed transmission comprising a continuously-variable speed transmission means including a primary variable-pitch pulley having a fixed pulley flange fixed to an input shaft and a movable pulley flange adapted to be axiall |
| 4745819 |
Compact power transmission device for a four-wheel drive vehicle |
May 24, 1988 |
| A center differential gear adapted for use in a power transmission device for full-time type four-wheel drive vehicles includes a diff-carrier coupled with a power transmitting front casing covering the front diff-carrier of a front-wheel differential gear and arranged coaxially with |
| 4735598 |
Continuously variable V-belt transmission |
April 5, 1988 |
| Pulleys are provided with load cam mechanisms which exert axial forces corresponding to transmitted torque, and actuator means such as ball screw mechanisms which shift the movable sheaves of both pulleys in axial direction, wherein the axial forces occuring at the pulleys are carried by |
| 4727967 |
Parking mechanism of a transmission |
March 1, 1988 |
| An end of a shaft member which is displaced and actuated in conjunction with a shift lever of a transmission presses and displaces a latch which is arranged in such a way as to be able to be displaced in an opposing direction against a cam surface of a cam which is formed on a fixed memb |
| 4727774 |
Cut-back pressure control device for multi-speed automatic transmission |
March 1, 1988 |
| A cut-back pressure control device for a multi-speed automatic transmission includes a cut-back valve that has a spool which is controlled by both hydraulic pressure which changes in response to shifting of a sub-transmission unit between high-speed and low-speed modes and a hydrauli |
| 4727773 |
Hydraulic circuit for controlling automatic transmission |
March 1, 1988 |
| A hydraulic circuit for controlling an automatic transmission. The hydraulic circuit has a control valve connected between a shift valve and a hydraulic servomotor for actuating a frictional engagement element such as a brake in a main transmission unit. The control valve is controlled b |
| 4727772 |
Multistage automatic shift control apparatus |
March 1, 1988 |
| A rotational speed detecting device for detecting the rotational speed of a predetermined element of a shifting unit is provided for at least one of a main shifting unit and a sub-shifting unit. A control is provided for controlling a predetermined friction engaging element of at least o |
