Abstract: A method for synthesizing a sol solution for forming porous alumina films having high heat resistance and high specific surface area and excellent adhesion to various substrate surfaces is provided. The method can include preparing an alkoxysilane and an aluminum solution separately, precipitating a silicon compound adsorbed on aluminum hydroxide in a solution of the alkoxysilane and the aluminum solution, and washing the precipitate filtered from the mixed solution with water to prepare a precipitate cake. A slurry solution is prepared by adding water to the precipitate cake, a pH adjusting treatment is performed on the slurry solution, and then an autoclave treatment is performed to prepare SiO2Al2O3 containing sol solution. A pH value of the slurry solution is controlled within a specific pH range in which the solution state of the SiO2Al2O3 containing sol solution after the autoclave treatment is a sol state.

Abstract: In a configuration of a method for preventing progression of corrosion in a steel pipe structure according to the present invention, two or more types of liquids 150 are injected, while being mixed, into a steel pipe that constitutes the steel pipe structure, from an opening at one of both ends of the steel pipe, and the inside of the steel pipe is filled with resin foam product (foam product 152) by foam expansion and hardening of the two or more types of liquids.

Abstract: In a configuration of a method for preventing progression of corrosion in a steel pipe structure according to the present invention, two or more types of liquids 150 are injected, while being mixed, into a steel pipe that constitutes the steel pipe structure, from an opening at one of both ends of the steel pipe, and the inside of the steel pipe is filled with resin foam product (foam product 152) by foam expansion and hardening of the two or more types of liquids.

Abstract: There is disclosed a composition for forming a protective layer of a dielectric material which comprises:(A) alkaline earth metal oxide particles; and(B) one or more organic compounds containing a metal element and represented by the formula (I):M.sup.1 (OR.sup.1).sub.n (I)wherein M.sup.1 represents Al, Si, Ti or Zr; R.sup.1 represents C.sub.2-8 alkyl group or C.sub.2-8 alkoxyalkyl group, provided that when M.sup.1 is Al, Ti or Zr, OR.sup.1 may be alkylacetoacetato or acetylacetonato, or when M.sup.1 is Zr, R.sup.1 may be a monovalent acyl group which may be substituted by an hydroxyl group; and n represents the valency of M.sup.1,or a partially hydrolyzed or co-hydrolyzed condensate thereof.

Abstract: A shift range device for an automatic transmission a shift lever shiftable to any one of a first neutral range, a reverse range, a second neutral range and one or more drive ranges which are arranged in the identified order. A neutral device includes a manual valve connected to the shift lever for establishing the neutral condition in such a manner that the manual valve inhibits the supply of oil pressure to any one of frictional engaging elements of the automatic transmission when the shift lever is transferred to the first neutral position or the second neutral position.

Abstract: An automatic transmission is controlled by detecting engine rmp following a transmission downshift and comparing the detected engine speed with a predetermined speed value. If the detected speed does not exceed the predetermined value, the solenoids controlling the down-shift are maintained energized. If the detected speed exceeds the predetermined speed value, the solenoids are de-energized to prevent overrunning of the engine.

Abstract: A hydraulic control circuit for an automatic transmission of at least 5 forward gear shift stages, which comprises:a first solenoid valve connected to each spool controlling hydraulic line pressure passage of a 1-2 shift valve and a 3-4 shift valve; anda second solenoid valve connected to a spool controlling hydraulic line pressure passage of a 4-5 shift valve;a third solenoid valve connected to a spool controlling hydraulic line pressure passage of at least 2-3 shift valvewherein each of said gear shift stages is established based on combination of ON-OFF operation of each of said solenoid valves.An inhibitor valve the valve is operative by any one of said first and second solenoid valves, and simultaneously establishing an inhibitor for solenoid valve disconnection and inhibitor for manual shift down operation. A manual range pressure at "3" or "2" is supplied to each friction member via at least two shift valves.

Abstract: An automatic transmission provided with a power take-off mechanism friction clutches and planetary gears for multiple gear ratio changes. A front friction drum houses the friction clutches which are coaxially and radially disposed with respect to each other, and a step portion is formed on a radial outer side of the drum for operating a radial outer one of the friction clutches and setting a power take-off drive gear.

Abstract: An oil pressure clutch mechanism of an automatic transmission is comprised of at least two clutches interposed coaxially in a front drum. An oil circuit for controlling the clutches is formed in the front drum in relation to an oil circuit in an oil pump cover. The oil circuit includes circular oil grooves formed between an outer face of the oil pump cover and an inner face of the drum. A circular drain groove is disposed axially between the circular oil grooves to receive oil leaked therefrom. A drain passage is formed in the front drum for conducting leaked oil from the drain groove to a location external of the front drum. The outlet end of the drain groove is spaced farther from the axis than is the inlet end thereof, whereby leaked oil is discharged through the oil drain passage under the influence of centrifugal force.

Abstract: A control circuit of a fluid coupling with a lock-up clutch includes a fluid coupling having a power chamber into which a working fluid is introduced for performing a transfer action between input and output elements via the fluid, a clutch member which suitably connects and disconnects the input and output elements, a working chamber formed separately of the power chamber, and a piston member displaced by a pressure difference between the working and power chambers to selectively engage and disengage the clutch member.

Abstract: A hydraulic control circuit for an automatic transmission is provided in which the automatic transmission has at least five forward gear shift stages. A plurality of solenoid valves are connected to hydraulic shift valves for controlling hydraulic line pressure utilized in the shifting between the various gear shift stages. Further, each of the gear shift stages is established dependent upon the operating condition of each of the solenoid valves. An inhibitor valve is provided which is operative by one of the solenoid valves and serves to provide an inhibiting function for solenoid valve disconnection and for manual downshift operation.

Abstract: If a vehicle is at rest after it has been detected that the shift position of the vehicle transmission has been shifted to neutral, hydraulic pressure is introduced to a brake in the transmission gear train that is for establishing the first speed state. The introduction of hydraulic pressure to the brake causes the brake to engage in advance of an actual shift to first speed. As a result, when the shift position is shifted out of the neutral range, the first speed state is quickly established, thereby shortening the neutral-to-drive shift time lag when the vehicle is at rest. If the vehicle is traveling after the shift to neutral has been detected, hydraulic pressure is exhausted from the brake to disengage the same, thereby preventing high-speed rotation of sun gears and clutch disk in the gear train due to transmission of rotation from the output side of the automatic transmission.

Abstract: A control circuit for a fluid coupling device with a high-gear clutch. The fluid coupling device includes a power chamber into which a working fluid is introduced for performing a transmission action, a clutch member arranged for connecting and disconnecting the input and output elements, a working chamber formed separately of the power chamber and a piston member forcibly displaced by a pressure differential between the working chamber and the power chamber for engaging or disengaging the clutch member. A fluid pressure source supplies working fluid to the interior of the power chamber and a high-gear clutch control valve supplies fluid to and discharges fluid from the working chamber for controlling the engagement and disengagement of the clutch.

Abstract: A rotary cam assembly includes a support shaft provided on a fixed bracket, a cam follower supported on the bracket so as to be slidably displaceable, a plate cam the outer circumferential portion of which has a cam surface contacted by the cam follower, the plate cam being freely rotatably mounted on the support shaft at a center hole, a cylindrical member extending along the central axis of the support shaft and having one end connected to the plate cam via coupling means formed in the center hole of the plate cam, and an input member connected to the other end of the cylindrical member for rotating the plate cam.

Abstract: The present invention provides an automatic transmission provided with an oil temperature increase prevention mode which automatically shifts gears on the basis of a gear-change pattern of that mode, and which is one of a plurality of gear-change patterns, in which downshift points are shifted toward the high-speed side from a standard gear-change pattern when the oil temperature signal rises above the level of a signal corresponding to a given temperature; and a control system for judging that oil temperature has increased to a given temperature on the basis of the oil temperature signal, and generating control signal so as to change the mode to the oil temperature increase prevention mode.

Abstract: A throttle valve assembly for displacing the plungers of at least two contiguous throttle valves in correspondence with the degree of throttle opening of an engine includes a first cam rotatably mounted on a stationary bracket fixed to the throttle valve bodies and having a cam face for displacing the plunger of the first throttle valve and an axially extending boss, a second cam rotatably mounted on the bracket and having a cam face for displacing the plunger of the second throttle valve and an axially extending boss, the first and second cams being coupled via coupling means formed on the opposing bosses, and a cable operatively associated with the engine torque demand for rotating the cams. The cam faces of the cams are formed to have a shape capable of providing the desired throttle pressure characteristic, the shapes of the cam faces differing from each other in order to obtain the optimum speed-change performance.

Abstract: A parking device for an automatic transmission system in automotive vehicles includes a parking gear connected to the engine output shaft, a pawl having one end pivotally mounted to the transmission housing and the other end pivotable towards and away from the parking gear, and a parking cam operatively associated with the pawl and movable axially of the gear for bringing the pawl into and out of engagement with the parking gear. A cam guide and a reaction supporting bracket are retained by a plurality of bolts and by at least one boss having a flat surface and affixed to the transmission housing so as to be situated on the side of the pawl opposite the parking cam.

Abstract: A transmission for a vehicle, including a torque converter, a planetary gear system capable of forming gear trains of forward low-speed range and high speed range by engagement and release of brakes and a clutch, a manual valve for gear shifting a shift valve, an electromagnetic valve, and a hydraulic control circuit for applying a line pressure to the clutch and brakes. The valves are mounted in a valve casing having a flat wall surface in face-to-face relation with a flat wall surface of a transmission casing. Clamped fluid-tight between the two flat wall surfaces is a partition plate which is provided with apertures for intercommunicating conduits of the hydraulic control circuit formed on the opposite flat wall surfaces of the casings. The present invention employs partition plates with different numbers of communicating holes in different positions.

Abstract: A speed change gear system of the type including an input shaft, an output shaft, three planetary gear sets each having a central sun gear, an ring gear, a set of planetary pinion gears meshingly connecting the sun gear with ring gear and a revolving carrier rotatably supporting the pinion gear, two clutches, and three brakes.