摘要:
In an automatic transmission, a governor shaft (8a) is arranged so that a center axis (Og) of said governor shaft is interposed between a center axis (Oa) of an idler shaft (9) and a center axis (Of) of a final drive gear (5). In one embodiment, the center axis of the governor shaft (8a) is further disposed between a center axis of an output gear (3) and the center axis of the final drive gear, and a governor valve (8c) is disposed above a drive shaft joint (7). In another embodiment, the governor valve (8c) is disposed below the drive shaft joint (7).
摘要:
An electro-hydraulic control for an automatic transmission for an automotive vehicle, comprises a 3-2 timing valve, an overrun clutch control valve, an electromagnetic valve under the control of a computer, and a shuttle valve. The shuttle valve has a spool movable responsive to a line pressure variable with the engine throttle opening degree. The spool is movable between a first position where the overrun clutch control valve is under the control of the electromagnetic valve and a second position where the 3-2 timing valve is under the control of the electromagnetic valve.
摘要:
In order to obviate shift shock during shifting between second and third gears in a transmission wherein a front dutch and a band brake having apply and release chambers, an accumulator is connected to the circuit via which line pressure is supplied from a 2-3 shift valve in a manner that the engagement/release of the two friction elements is staged in a manner that reduces sharp fluctuations in the output shaft torque.
摘要:
A hydraulic servo device with a built-in accumulator, comprising a servo piston fit in a servo cylinder and connected via a stem to a band brake, an accumulator piston having a large diameter outer diameter portion and a small diameter outer diameter portion fit in the servo cylinder at two inner diameter portions thereof having different diameters and an inner diameter portion fit around a small diameter outer diameter portion of the servo piston, and an accumulator piston spring biasing the accumulator piston toward the servo piston. A servo release pressure acts on a pressure acting area defined by a large diameter outer diameter portion of the servo piston, a servo apply pressure acts on a pressure acting area defined between the large diameter outer diameter portion the servo piston and the small diameter outer diameter portion thereof, and an accumulator pressure acts on a pressure acting area defined between the large diameter outer diameter portion of the accumulator piston and the small diameter outer diameter portion thereof.
摘要:
A shift valve for an automatic transmission wherein governor pressure acts on a spool in such a direction as to compress a first spring, and throttle representative pressure acts on a plug in such a direction as to compress the first spring. The shift control valve further comprises a second spring arranged to act on one of the plug and the spool in the same direction as the direction in which the throttle representative pressure acts thereon.
摘要:
A hydraulic control system comprises a pressure regulator valve (2) which generates a line pressure in response to a throttle related pressure and a cut back pressure. The throttle related pressure varies in a pattern corresponding to the pattern of output torque of an engine. The cut back pressure appears at low rotational speeds of a transmission output shaft and varies with an increase in the degree of throttle opening and decreases with an increase of rotational speed of the transmission output shaft. The line pressure, therefore, varies in a pattern corresponding to the pattern of torque supplied to a transmission input shaft through a torque converter.
摘要:
A single accumulator (40) is operatively connected to a fluid operated clutch (C3) so as to retard a rise in fluid pressure supplied to the fluid operated clutch (C3) which is to be engaged during a downshift from the highest speed ratio to any one of the lower speed ratios and when the transmission shifts from a neutral to a forward drive.