Abstract: A gas turbine engine includes a turbine section that has a ceramic matrix composite body that defines a core gaspath side that a row of blades, a forward end, an aft end, and circumferential sides. The forward end abuts at least one vane of a first row of vanes, and the aft end including a seal channel. A compliant seal is disposed in the seal channel and seals against at least one vane of a second row of vanes.

Abstract: A gas turbine engine includes a turbine section that has a retainer ring, a first vane that bears against the retainer ring to prevent movement of the first vane in a first axial direction, a second vane axially spaced from the first vane, and a blade axially between the first vane and the second vane. A blade outer air seal is situated radially outwardly of the blade. The blade outer air seal includes a ceramic matrix composite body that defines a core gaspath side that faces the blade, a forward end, an aft end, and circumferential sides. There is a spring seal at the aft end of the blade outer air seal that seals against the second vane. The spring seal provides a preload that biases the blade outer air seal against the first vane and thereby biases the first vane against the retainer ring.

Abstract: A power transmission having two simple planetary gear sets produces five forward speed ratios and a reverse ratio. The two highest forward speed ratios, fourth and fifth, are overdrive ratios using the same input member in one of the planetary sets and exchanging output members in the other planetary set. The power transmission also has a continuous input drive to a sun gear of one of the planetary sets and incorporates five clutches and two brakes to establish the five forward speed ratios. The clutches and brakes are disposed in parallel with the clutch and one-way device to permit more control of the shift timing.

Abstract: The present invention relates to a power transmission that is interposed between the internal combustion engine and the drive ratio selection transmission of a vehicle. A motor/generator is operatively connected to the power transmission, and the power transmission selectively drives accessories to the internal combustion engine, such as an oil pump, power steering pump and air conditioning compressor. The power transmission employs compounded first and second planetary gear sets. A common gear member serves not only as the ring gear for the first planetary gear set but also as the sun gear for the second planetary gear set. The motor/generator drives the accessories when the internal combustion engine is idling or off, allowing those accessories to be smaller while delivering adequate output.

Abstract: An integrated power transmission has an internal combustion (IC) for engine power input, an electrical motor power input and a combining planetary transmission coupled with both power inputs. The power transmission also includes a multi-speed transmission input. The combining planetary transmission can be driven by the electric motor input only with a one-way device providing a reaction path for the combining planetary transmission and a stationary power input at the IC engine. A friction clutch member is provided to selectively establish a drive path including both power input members in a multi-speed transmission input. This clutch permits both power sources, electrical and internal combustion, to provide power to the combining planetary and also permits starting of the IC engine while the vehicle is in motion.

Abstract: A transmission control for a multi-speed planetary gear arrangement is responsive to thrust forces generated by the band at the band drum support controlled by an on-coming friction device during a ratio interchange to generate a control signal. The control signal is used to begin the disengagement process of the off-going friction device.

Abstract: A differential gear assembly has a pair of face gears meshing with intermeshing input and idler gears respectively. The face gears are secured by threaded fasteners carrier assembly which houses a pair of pinion side gears rotatably mounted on a pin or shaft, and a pair of output side gears both meshing with each pinion side gear. The output gears are connected with output shaft members which extend outwardly through the carrier and a surrounding housing. The separating forces generated between the meshing gear pairs (i.e., input/face, idler/face and pinion side/pinion output gears) are absorbed by the carrier assembly. The housing structure enclosing the gear members and carrier assembly is free from the gear separating forces.

Abstract: A power transmission has a plurality of parallel axes on each of which is disposed a shaft supporting a pair of selectively operable friction torque transmitting devices and gear members. One of the parallel axes supports an input shaft, which is drivingly connected to two of the other shafts through one-way devices and a chain drive. A transfer shaft is disposed in parallel with the other axes to transmit drive forces from the interconnected shafts to an output shaft. The transfer shaft has a gear member meshing with the gear members on the input driven shafts, which is effective to transmit the drive to the output shaft, which in turn is connected to a conventional output assembly such as a differential.

Abstract: A pair of selectively operable torque transmitting devices, such as a clutch and brake, are provided to control the torque and speed ratio in a planetary gear set. One device, a clutch, is spring engaged, to provide direct drive in the planetary set, and fluid released by a selectively operable piston assembly. The other device, a brake, is pressure engaged by a selectively operable piston assembly to establish a drive ratio in the planetary set. A torque responsive mechanism is incorporated in the piston assembly to control the overlap between the clutch/brake exchange during a ratio interchange.

Abstract: A transmission control in a multi-speed transmission gear arrangement is responsive to thrust forces generated at the gear member controlled by an on-coming friction device during a ratio interchange to generate a control signal. The control signal is used to begin the disengagement process of the off-going friction device.

Abstract: A transmission casing embodying the concepts of the present invention has a one-piece body portion with front and rear faces. The first of two major openings penetrates the front face, and the second of the two major openings penetrates the rear face. A pair of axially spaced front and rear drive gear bearing supports are provided in the transmission casing, and the drive gear bearing supports are axially accessible through the first major opening. A pair of axially spaced front and rear idler gear bearing supports are laterally displaced from the respective drive gear bearing supports and the idler gear bearing supports are also axially accessible through the first opening. A final drive bearing retainer is demountably secured within the second major opening. A final drive rear bearing support is carried by the final drive bearing retainer. An aperture for receiving the final drive front bearing support penetrates the first face and is aligned with the final drive rear bearing support.

Abstract: The present invention relates to a power transmission that is interposed between the internal combustion engine and the drive ratio selection transmission of a vehicle. A motor/generator is operatively connected to the power transmission, and the power transmission selectively adds and subtracts torque provided by the motor/generator to the torque provided by the internal combustion engine. The power transmission effects the operative interconnection between both the internal combustion engine and the motor/generator to the drive ratio selection transmission. The power transmission employs compounded first and second planetary gear sets. A common gear member serves not only as the ring gear for the first planetary gear set but also as the sun gear for the second planetary gear set. The power transmission provides operating advantages not possible with prior art mechanisms, and these advantages allow the internal combustion engine to operate with desirable engine emissions.

Abstract: A planetary gear arrangement, which provides a starting device for a power transmission, has an electrically biased reaction member. The reaction member is operatively connected with an electric motor/generator that is selectively controlled to establish a braking force at the reaction member. A fluid operated friction brake is disposed in parallel with the motor/generator to provide a selective fully engaged brake to establish the reaction, or a slipping brake to assist the generator in establishing the reaction at the planetary gear arrangement. A fluid operated clutch is also associated with the planetary gear arrangement to provide a selective 1:1 ratio within the planetary gear arrangement. The planetary gear arrangement cooperates with the park mechanism in the transmission and the motor/generator to provide an engine cranking mechanism which is useful during engine start.

Abstract: A power transmission has a selectively controlled two-speed, underdrive and direct drive, planetary mechanism disposed between a torque converter and a multi-speed gear arrangement. A control for the two-speed planetary mechanism responds to vehicle operating parameters, such as throttle and brake, for establishing the selection of the ratio condition in the two-speed planetary mechanism.

Abstract: A multispeed power transmission has a plurality of forward speed ratios, the lowest of which is provided by two planetary gear sets that are compound. One of the planetary gear sets is effective during the low ratio only while the other is effective in more than one forward ratio.

Abstract: A power transmission has a torque converter, a planetary gear arrangement and a variable ratio drive belt. The planetary gear arrangement is controlled to establish a low forward ratio and a reverse ratio. The variable ratio belt drive is controlled to provide a variable ratio high speed range. A torque converter is utilized during the low forward ratio and the reverse ratio and is selectively bypassed during the high speed range.

Abstract: A multispeed transmission has a planetary gear arrangement and two pair of countershaft gears. The countershaft gears are drivingly connectible between the output of the planetary gear arrangement and the output shaft of the transmission. One pair of the countershaft gears provides a rotating reaction for the planetary during one speed ratio and a reduction ratio during at least one other speed ratio. The other pair of countershaft gears provides a reduction ratio from the planetary during the one speed ratio and a single reduction ratio between the transmission input and the transmission output in at least one other speed ratio. The planetary transmission is controlled by clutches and brakes to establish a reduction ratio, a direct drive and an overdrive ratio.

Abstract: A transversely mounted transmission has a torque converter housing portion, a gear housing portion, and differential housing portion each having a centerline noncoincidental with the others. The torque converter housing portion has a mounting face adapted to be secured to an engine at an engine mounting plane. The differential housing portion has a substantially cylindrical section disposed on the engine side of the mounting plane. At least part of the differential housing is disposed within a cylindrical extension defined by the outer periphery of the torque converter housing portion.

Abstract: A hydraulic control for an automatic transmission has a throttle valve providing a control pressure which is used in part to determine the transmission shift pattern. The throttle valve has a control area which is normally connected to exhaust. A solenoid responsive to the energizing of a high load engine accessory is operable to close the control area exhaust thereby causing the throttle valve to acknowledge the change in engine power available for vehicle drive. The throttle valve control pressure is thus changed to provide a signal more closely related to the engine torque available.

Abstract: A planetary transmission has a fluid applied brake for a low speed ratio and a fluid release spring applied clutch for a high speed ratio. The clutch apply springs respond to a centrifugally actuated member such that below a predetermined output speed, the springs are not compressed sufficiently to cause engagement of the clutch. The clutch is maintained disengaged by the fluid pressure which engages the brake regardless of output speed. The interchange of the brake and clutch are selectively controlled by controlling the fluid pressure source.