Abstract:
In a fail-safe mechanism for an automatic transmission (3), when a predetermined gearshift (Rev) is positioned in the automatic transmission (3) during a non-failure state of the automatic transmission, a first valve unit (70) moves from a non-failure position toward a failure position as the oil pressure for positioning the predetermined gearshift (Rev) is caused to act on a fail-safe valve (50) as an extraneous matter-discharging oil pressure (PR).
Abstract:
A regulator valve (10) is structured such that hydraulic pressure to be output from a regulated pressure output port is regulated according to urging forces, i.e., line pressure to be regulated, throttle pressure, spring force from a compression coil spring (13), and operating force from a plunger (15), which are applied to a valve spool (12). The plunger has a small diameter portion and a large diameter portion having a diameter larger than the diameter of the small diameter portion, both of which are axially displaceably retained in a spring receiving sleeve (14). The small diameter portion is urged in one axial direction at one end of the plunger that protrudes into a spring chamber (17) and faces the valve spool, while the large diameter portion is urged in the other axial direction by range pressure at the other end of the plunger which is isolated from the small diameter portion located in the spring chamber.
Abstract:
A regulator valve is structured such that hydraulic pressure to be output from a regulated pressure output port is regulated according to urging forces, i.e., line pressure to be regulated, throttle pressure, spring force from a compression coil spring, and operating force from a plunger, which are applied to a valve spool. The plunger has a small diameter portion and a large diameter portion having a diameter larger than the diameter of the small diameter portion, both of which are axially displaceably retained in a spring receiving sleeve. The small diameter portion is urged in one axial direction at one end of the plunger that protrudes into a spring chamber and faces the valve spool, while the large diameter portion is urged in the other axial direction by range pressure at the other end of the plunger which is isolated from the small diameter portion located in the spring chamber.
Abstract:
A hydraulic control unit (18), for a power transmission system having an oil receiving device (26, 37), which controls a power transmitting condition of the power transmission system, and an oil reserving device for feeding the oil to the oil receiving device, wherein the oil reserving device comprises a piston (59) in which a diametrically large portion and a diametrically small portion are arranged integrally and coaxially, a first hydraulic chamber (57) in which the diametrically large portion, and a second hydraulic chamber (58) in which the diametrically small portion are housed liquid-tightly and movably back and forth; and an oil feeding amount control device for feeding the oil of the first hydraulic chamber to the oil receiving device, by raising the oil pressure in the second hydraulic chamber (58) to operate the piston (59).
Abstract:
An adapter (20) includes a base body (38) having a pair of coupling members (48a, 48b) and a connecting plug (42) inserted through a hole (36) in the base body (38) and screw-engaged with a port (28a) of the two-way valve (14). In addition, upon threaded engagement of the connecting plug (42), the base body (38) is mounted with respect to an attachment surface (34) of the two-way valve (14). Further, a seal member (40) is installed on an end surface of the base body (38), such that a sealing function is performed by abutment of the seal member (40) against the attachment surface (34). Moreover, first and second connecting flanges (98b, 116b) of a connecting apparatus (16) are engaged with respect to the coupling members (48a, 48b) of the adapter (20).
Abstract:
Objects of the present invention are to reduce the costs of a swash plate compressor and to improve the quality thereof by fully automating the fitting of a piston and a shoe to a swash plate. A slide table (52) is provided that is movable in a direction perpendicular to the axis 0 of a rotating shaft (2) and a piston that is to be mounted on the slide table (52) is disposed in parallel with the slide table. The slide table (52) is advanced so that a shoe (7) disposed in a notch (4a) of the piston (4) on the slide table (52) is raised by a presser member (54), and the piston (4) is brought into alignment with the circumferential portion of the swash plate. A shaft supporting portion (65) for supporting the rotating shaft is provided on a pair of supporting heads (50, 51) supporting the rotating shafts (2), and piston supporting portions (67) for supporting the piston are provided at a plurality of circumferential portions along the circumference thereof. The piston on the slide table (52) is supported by the piston supporting portions (67) in a state in which the piston is assembled to the circumferential portion of the swash plate, and the respective piston supporting portions (67) are rotated together at a predetermined pitch in synchronism with the advancement of the slide table.
Abstract:
A control device for an automatic transmission including a hydraulic actuator that is actuated on the basis of a hydraulic pressure supplied and a linear solenoid valve that controls the hydraulic pressure supplied to the hydraulic actuator on the basis of a driving current of a solenoid includes an ECU that executes current feedback control over a current value of the driving current that is flowed to the solenoid using at least a proportional term and an integral term on the basis of a deviation (ΔΙ) between a target current value (Itgt) and actual current value (Ir) of the solenoid such that the hydraulic pressure supplied to the hydraulic actuator becomes a target hydraulic pressure. The ECU increases a proportional gain (Kp) in the current feedback control as a fluid temperature (To) detected by a fluid temperature sensor increases.