Abstract: Power transmissions incorporate gear ratios including a plurality of forward ratios, a neutral condition and at least one reverse ratio. The establishment of each ratio is controlled by selectively engageable hydraulically operated friction devices, such as clutches and brakes. The interchange between forward ratios is controlled by the interchange of at least one friction device. The control elements to accomplish the establishment and interchange of the ratios include a pressure source, shift valve, solenoid control valves and pressure control valves. The solenoid valves are electrically actuated and the hydraulic portion of the control includes elements that permit continued operation of the transmission in selected ratios in the event of electrical discontinuance.

Abstract: The output shaft of a power transmission is selectively connectible with a stationary housing by a plurality of parking pawls. The pawls are pivotally mounted in a wall member and spring-loaded to an extended position whereby recesses in an output driven disc are engaged. An operator controlled actuator member is selectively movable into abutment with the pawls to enforce retraction thereof into pawl recesses such that the recesses in the disk are not engaged.

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: A regenerative transmission that utilizes three prime mover input modes. The transmission has at least one planetary gear set, and each planetary gear set has an inner gear member, an outer gear member and a plurality of planet gear members meshingly engaging the inner and outer gear members. The planet gear members are operatively mounted on a carrier in each planetary gear set. The outer gear member in each planetary gear set is grounded, and the inner gear member in each planetary gear set is connected to a respective motor/generator. An output shaft is provided and means are provided selectively to connect the carrier in each planetary gear set to the output shaft. A plurality of torque transfer devices selectively connect the prime mover input modes to the output shaft.

Abstract: Power transmissions incorporate gear ratios including a plurality of forward ratios, a neutral condition and at least one reverse ratio. The establishment of each ratio is controlled by selectively engageable hydraulically operated friction devices, such as clutches and brakes. The interchange between forward ratios is controlled by the interchange of at least one friction device. The control elements to accomplish the establishment and interchange of the ratios include a pressure source, shift valve, solenoid control valves and pressure control valves. The solenoid valves are electrically actuated and the hydraulic portion of the control includes elements that permit continued operation of the transmission in selected ratios in the event of electrical discontinuance.

Abstract: A cable mechanism has an adjustment portion which allows the cable length to be adjusted at assembly. A first movable lock member is provided to prevent inadvertent early adjustment of the cable length by stabilizing a lock member on the cable in an unadjusted position prior to removal of the first lock member. A second movable lock member is provided to maintain the cable lock portion in the adjusted position and to prevent inadvertent disconnection of the cable adjusting mechanism.

Abstract: A selectively engageable friction device, such as a clutch or brake, requires a supply of cooling fluid during engagement. The friction device is engaged by fluid directed to a piston through a passage in a shaft. A stepped diameter tube is slidably disposed in the shaft and is movable therein by fluid pressure to control the flow of lubrication and cooling fluid which is directed to the friction device during engagement and to prevent distribution of lubrication and cooling fluid when the device is disengaged.

Abstract: An improved transmission particularly adapted for use with a constant speed engine. The transmission has an input shaft to receive power from the engine. A generator is associated with the transmission, and the generator is driven by the engine. A motor is powered by the generator. The transmission also employs a compound planetary gear set having two planetary gear sub-sets. Each planetary gear sub-set has an inner gear member and an outer gear member, each of which meshingly engage a plurality of planet gear members. One gear member of each planetary gear sub-set is conjoined. A second gear member of each planetary gear sub-set is also conjoined. The input shaft is operatively connected to one of the conjoined gear members, and the motor is operatively connected to the other of the conjoined gear members. The output shaft is operatively connected to the third gear member in the first planetary gear sub-set, and the third gear member in the second planetary gear sub-set is selectively connected to ground.

Abstract: A planetary gear arrangement for a multi-speed power transmission has a carrier assembly with a plurality of pinion gear sets wherein each set has one long pinion and three short pinions. The long pinion meshes with two short pinions and a ring gear. The third short pinion meshes with a sun gear and one of the short pinions. The other two short pinions mesh with a ring gear and a sun gear, respectively. The carrier and both sun gears are connected with selectively operable rotating torque transmitters and the carrier, one sun gear and one ring gear are connected with selectively operable stationary torque transmitters while the other ring gear defines an output member for the planetary gear arrangement.

Abstract: A manual shift lever for an automatic transmission has a park position and a plurality of drive positions. The shift lever is detented into each position and has both a brake/transmission shift interlock (BTSI) and an ignition interlock which independently inhibit shifting from the park position prior to predetermined operating inputs, such as manipulating the ignition key and/or the brake pedal. A bell crank connected with the interlocks provides the inhibiting structure. To limit the operator input force on the bell crank, a lost motion structure is provided between an operator button on the shift lever handle and an actuator rod and pin which engage the bell crank.

Abstract: A variable, four-mode, input-split, parallel, hybrid electric transmission for a vehicle. An input shaft receives power from the vehicle engine, and an intermediate output shaft delivers power to drive the vehicle. First and second motor/generators are employed as are energy storage devices, such as batteries, for accepting power from, and supplying power to, the first and second motor/generators. A control unit regulates power flow between the energy storage devices and the motor/generators as well as between the first and second motor/generators. A compounded planetary gear set and an intermediate planetary gear set are used. Each planetary gear sub-set and the intermediate planetary gear set has an inner gear member and an outer gear member, each of which meshingly engage a plurality of planet gear members supported on a carrier.

Abstract: A cable mechanism has an adjustment portion which allows the cable length to be adjusted at assembly. A first movable lock member is provided to prevent inadvertent early adjustment of the cable length by stabilizing a lock member on the cable in an unadjusted position prior to removal of the first lock member. A second movable lock member is provided to maintain the cable lock portion in the adjusted position and to prevent inadvertent disconnection of the cable adjusting mechanism.

Abstract: A transmission assembly having an input shaft, an output shaft as well as first and second planetary gear sets. The first and second planetary gear sets each have three gear members. Two of the gear members in each planetary gear set are a sun gear and a ring gear. As such, the sun and ring gears, one in each planetary gear set, are paired. The sun and ring gears in each of the first and second planetary gear sets are operatively connected in each respective planetary gear set through the third gear members, which are in the nature of a plurality of planet gears mounted on respective first and second carriers. In one of the planetary gear sets the planet gears are themselves compounded. One of the pairs of sun and ring gears is continuously connected, and the carrier in the first planetary gear set is selectively, and independently, connected to two gear members in the second planetary gear set. The carrier in the second planetary gear set is continuously connected to the output shaft means.

Abstract: Shift control valves for controlling the engagement of a transmission friction devices have a solenoid control chamber pressurized to initiate shifting and a latch chamber pressurized to sustain the selective friction device in an engaged position. The latching chamber pressure is delivered through a latch valve which is also solenoid controlled to direct pressure to the chamber when the solenoid is de-energized and to exhaust the latch chamber when the solenoid is energized.

Abstract: A neutral-reverse shift control actuator is provided in a countershaft transmission. The actuator is operatively connected through a resilient detent mechanism to a forward shift control mechanism. During a neutral-reverse shift maneuver, the drive connection partially manipulates the forward synchronizer, such that synchronization between the input and output shaft is achieved during a reverse shift maneuver. During a five-six or six-five shift, a detent structure is available to reduce the 3-4 neutral force of the centering spring in the shift control mechanism.

Abstract: A one-mode, input-split, parallel, hybrid transmission for a vehicle has an input shaft which receives power from the vehicle engine, and an output shaft which delivers power to drive the vehicle. First and second motor/generators are employed, as are energy storage units, such as batteries, for accepting power from, and supplying power to, the first and second motor/generators. A control unit regulates power flow between the energy storage units and the motor/generators as well as between the first and second motor/generators. A planetary gear set has an inner gear member and an outer gear member, each of which meshingly engage a plurality of planet gear members. The input shaft is operatively connected to one of the gear members in the planetary gear set, and the output shaft is operatively connected to one of the other of the gear members in the planetary gear set.

Abstract: A two-mode, compound-split, electro-mechanical transmission utilizing an input for receiving power from an engine. A power output is also utilized to deliver power to the drive wheels of the vehicle. First and second motor/generators are used in conjunction with an energy storage device for accepting power from, and supplying power to, the first and second motor/generators. A control mechanism regulates power flow among the energy storage device and the motor/generators as well as between the first and second motor/generators. A compound planetary gear set having first and second planetary gear sub-sets is incorporated in the transmission. Each of the planetary gear sub-sets has an inner gear member and an outer gear member, each of which meshingly engages a plurality of planet gear members.

Abstract: A method and apparatus as presented for monitoring the condition of oil in a transmission to present a service indicia prior to the time that the oil life has been spent. A thermosensor and a tachometer are associated with the transmission to present respective output signals correlated with operating temperature and transmission revolutions. The revolutions of the transmission are weighted as a function of the deviation of the temperature from a temperature standard. The resulting effective revolutions are then applied to a down counter which is initially loaded to the number of allowable effective revolutions when the transmission oil is changed or the transmission serviced. When the down counter has counted out, a message is displayed indicating the need for service.

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: A variable, two-mode, input-split, parallel, hybrid electric transmission for a vehicle has an input shaft receiving power from the vehicle engine, and an output shaft delivering power to drive the vehicle. First and second motor/generators are employed as are energy storage devices, such as batteries, for accepting power from, and supplying power to, the first and second motor/generators. A control unit regulates power flow between the energy storage devices and the motor/generators as well as between the first and second motor/generators. At least one planetary gear set is used. Each planetary gear set has an inner gear member and an outer gear member, each of which meshingly engage a plurality of planet gear members supported on a carrier. The input shaft is operatively connected to one of the gear members in the planetary gear set, and the output shaft is operatively connected to one of the other gear members in the planetary gear set.