Abstract: A transmission system includes a transmission housing and a countershaft having no less than two gears, with the gears defining a plurality of gear ratios. The transmission system also includes a module housing, a first output shaft rotatably coupled to the countershaft, and a second output shaft rotatably coupled to the countershaft. The transmission system further includes a first clutch configured to selectively rotatably couple the first output shaft to the countershaft. The transmission system also includes a second clutch configured to selectively rotatably couple the second output shaft to the countershaft. The transmission system further includes an electric machine configured to deliver rotational power to at least one of the first and second output shafts to deliver rotational power to the countershaft. The countershaft is rotatably coupled to either of the first and second output shafts for all of the gear ratios.

Abstract: A hydraulic control system for use with a transmission of a vehicle powertrain system includes a four-position main pressure regulator that selectively combines input fluid flow and pressure from two independent fluid sources and provides output fluid flow to two dependent sources of the transmission.

Abstract: A transmission system includes a transmission housing and a countershaft having no less than two gears, with the gears defining a plurality of gear ratios. The transmission system also includes a module housing, a first output shaft rotatably coupled to the countershaft, and a second output shaft rotatably coupled to the countershaft. The transmission system further includes a first clutch configured to selectively rotatably couple the first output shaft to the countershaft. The transmission system also includes a second clutch configured to selectively rotatably couple the second output shaft to the countershaft. The transmission system further includes an electric machine configured to deliver rotational power to at least one of the first and second output shafts to deliver rotational power to the countershaft. The countershaft is rotatably coupled to either of the first and second output shafts for all of the gear ratios.

Abstract: A system for use in an automatic transmission includes a 3-way solenoid-actuated valve includes a valve body having an inlet port and a first outlet port and a second outlet port, a valve disposed within the valve body and slidably controllable to proportion flow between the first outlet port and the second outlet port, and a spring disposed in the valve body to bias the valve for flow toward the second outlet port. The system also includes at least one pump providing fluid to the inlet port, a first fluid circuit connected to the first outlet port providing fluid to a first subsystem of the automatic transmission, and a second fluid circuit connected to the second outlet port providing fluid to a second subsystem of the automatic transmission.

Abstract: A hydraulic control system for use with a transmission of a vehicle powertrain system includes a four-position main pressure regulator that selectively combines input fluid flow and pressure from two independent fluid sources and provides output fluid flow to two dependent sources of the transmission.

Abstract: A system for use in an automatic transmission includes a 3-way solenoid-actuated valve includes a valve body having an inlet port and a first outlet port and a second outlet port, a valve disposed within the valve body and slidably controllable to proportion flow between the first outlet port and the second outlet port, and a spring disposed in the valve body to bias the valve for flow toward the second outlet port. The system also includes at least one pump providing fluid to the inlet port, a first fluid circuit connected to the first outlet port providing fluid to a first subsystem of the automatic transmission, and a second fluid circuit connected to the second outlet port providing fluid to a second subsystem of the automatic transmission.

Abstract: A positive displacement pump assembly (28) for use with a vehicle powertrain system (10) includes a stator (30) having a chamber (32) and a vane pump (34) disposed in the chamber (32) and cooperating with the stator (30) so as to define at least three pumping regions (38) in the chamber (32) with each of the at least three pumping regions (38) having an inlet region (40) and an outlet region (42), wherein rotation of the vane pump (34) displaces fluid across each of the at 10 least three pumping regions (38) such that each outlet region (40) provides a separate source of fluid power to the powertrain system (10).

Abstract: A system and method for fast fill of a hydraulic accumulator used in an automatic transmission includes providing an active fast fill mechanism fluidly connected to a hydraulic accumulator and a hydraulic system of the automatic transmission, providing an electronic control module in communication with the active fast fill mechanism, activating, by the electronic control module, the active fast fill mechanism to allow the hydraulic accumulator to fill with fluid from the hydraulic system, filling, by the active fast fill mechanism, the hydraulic accumulator with fluid, and de-activating, by the electronic control module, the active fast fill mechanism to stop filling the hydraulic accumulator with fluid from the hydraulic system during stop/start engine events of a vehicle.

Abstract: A system and method for fast fill of a hydraulic accumulator used in an automatic transmission includes providing an active fast fill mechanism fluidly connected to a hydraulic accumulator and a hydraulic system of the automatic transmission, providing an electronic control module in communication with the active fast fill mechanism, activating, by the electronic control module, the active fast fill mechanism to allow the hydraulic accumulator to fill with fluid from the hydraulic system, filling, by the active fast fill mechanism, the hydraulic accumulator with fluid, and de-activating, by the electronic control module, the active fast fill mechanism to stop filling the hydraulic accumulator with fluid from the hydraulic system during stop/start engine events of a vehicle.