Abstract: Methods and systems are provided for a transmission. In one example, the transmission may include a brake system arranged in-line with a second brake along a longitudinal axis of the transmission. Each brake may have a plurality of separator plates which may be secured to a housing of the transmission by at least one pin. The brake system may further include an end plate positioned between the first brake and the second brake, the end plate secured to the housing by a plurality of dowel pins.

Abstract: Methods and systems are provided for a transmission. In one example, the transmission may include a brake system arranged in-line with a second brake along a longitudinal axis of the transmission. Each brake may have a plurality of separator plates which may be secured to a housing of the transmission by at least one pin. The brake system may further include an end plate positioned between the first brake and the second brake, the end plate secured to the housing by a plurality of dowel pins.

Abstract: A torque convertor and direct drive unit arrangement and operating methods are provided herein. In one example, a prime mover may be configured to be coupled to a transmission via one of a torque convertor and a direct drive unit, the direct drive unit including a higher range clutch and a lower range clutch.

Abstract: Methods and systems for a vehicle transmission are provided herein. The vehicle transmission includes an input interface configured to mechanically couple to a motive power source. The vehicle transmission further includes a first disconnect device releasably mechanically coupling a first output to a first drive axle and a second disconnect device releasably mechanically coupling a second output to a second drive axle.

Abstract: Systems and methods for a multi-speed electric axle are provided. The multi-speed electric axle includes an electric motor that is rotationally coupled to an input shaft. The multi-speed electric axle also includes a planetary gearset connected to the input shaft via an input gear reduction, a lower-speed clutch that selectively grounds a ring gear in the planetary gearset to a housing, and a higher-speed clutch that selectively connects a sun gear to a carrier.

Abstract: Methods and systems for a vehicle transmission are provided herein. The vehicle transmission includes an input interface configured to mechanically couple to a motive power source. The vehicle transmission further includes a first disconnect device releasably mechanically coupling a first output to a first drive axle and a second disconnect device releasably mechanically coupling a second output to a second drive axle.

Abstract: A torque convertor and direct drive unit arrangement and operating methods are provided herein. In one example, a prime mover may be configured to be coupled to a transmission via one of a torque convertor and a direct drive unit, the direct drive unit including a higher range clutch and a lower range clutch.

Abstract: Methods and systems are provided for a dual motor electric transmission configured with two dual synchronizers to reduce torque interruption during gear shifting. In one example, a method may include dropping torque of a first electric motor, allowing a first synchronizer to shift from a first gear arrangement to a second gear arrangement, and compensating for dropped torque with a second electric motor. The method may be repeated to shift a second synchronizer from the first gear arrangement to the second gear arrangement, allowing uninterrupted torque supply during gear shifting.

Abstract: A method and system for operating a transmission that includes two power take off devices is described. In one example, an internal combustion engine and/or an electric machine may supply power to accessory devices via first and second power take off devices. Alternatively, power may be delivered to the transmission via one or both of the first and second power take off devices.

Abstract: Torque converter arrangements and operating methods are provided herein. In one example, the torque converter includes a first attachment interface designed to rotationally couple to a prime mover and a second attachment interface designed to rotationally couple to a transmission. The torque converter further includes a lock-up clutch with an engagement spring embedded in an actuation piston, a plurality of separator plates supported by one or more guiding pins that extend through the plurality of separator plates and into a casing, and a plurality of friction plates interleaved with the plurality of separator plates, where the plurality of separator plates and friction plates are axially captured between the actuation piston and an end plate.

Abstract: Methods and systems for a vehicle transmission are provided herein. The vehicle transmission includes an input interface configured to mechanically couple to a motive power source. The vehicle transmission further includes a first disconnect device releasably mechanically coupling a first output to a first drive axle and a second disconnect device releasably mechanically coupling a second output to a second drive axle.

Abstract: Torque converter arrangements and operating methods are provided herein. In one example, the torque converter includes a first attachment interface designed to rotationally couple to a prime mover and a second attachment interface designed to rotationally couple to a transmission. The torque converter further includes a lock-up clutch with an engagement spring embedded in an actuation piston, a plurality of separator plates supported by one or more guiding pins that extend through the plurality of separator plates and into a casing, and a plurality of friction plates interleaved with the plurality of separator plates, where the plurality of separator plates and friction plates are axially captured between the actuation piston and an end plate.

Abstract: Methods and systems are provided for wet clutch pressure control to reduce drag and degradation of rotary seals in a transmission. In one example, a method may include determining an upper threshold pressure based on a rotational speed of a shaft of the transmission, determining a lower threshold pressure based on the rotational speed of the shaft, and adjusting a pressure of hydraulic fluid applied to the clutch to be between the upper threshold pressure and the lower threshold pressure. In this way, the pressure of the hydraulic fluid applied to the clutch may be maintained at a level that allows full torque transfer by the wet clutch while reducing drag on the rotary seals.

Abstract: A steering system for a vehicle is provided. The steering system includes a mechanical interface coupled to an auxiliary hydraulic steering pump and an output of a transmission. In the system, the transmission is mechanically coupled to a motive power source and the auxiliary hydraulic steering pump is hydraulically coupled to a hydraulic steering assembly.

Abstract: Described is a transmission including an input direction assembly, a first clutching assembly, a second clutching assembly, a first range clutching assembly, a second range clutching assembly and a housing. The input and direction selection assembly includes an input shaft, a first direction selection clutch assembly, a second direction selection clutch assembly and a reversing gear in driving engagement with the second direction selection clutch assembly and the input shaft. The first clutching assembly is selectively drivingly engaged with the input and direction selection assembly and the first range clutching assembly. The second clutching assembly is selectively drivingly engaged with the input and direction selection assembly. The first range clutching assembly is selectively drivingly engaged with the second clutching assembly and the second range clutching assembly.

Abstract: A piston, comprising: a shaft side with a first circumferential groove, said first circumferential groove bounded by a continuous circumferential seal plateau, said seal plateau extending axially outward from said first circumferential groove, wherein a planar outboard surface extends radially outboard from said seal plateau; a clutch side having two grooves alternating with two lands; an inner circumferential surface having a seal groove formed therein; and an outer circumferential surface having a seal groove formed therein, wherein the sides and surfaces form a ring shape.

Abstract: A wet clutch assembly may have a clutch drum, a clutch chamber formed within the clutch drum, a clutch actuation piston movably disposed within the clutch drum and configured to be actuated via a hydraulic pressure in the clutch chamber. A fluid line may at least partially extend through the clutch actuation piston, where the fluid line provides fluid communication with the clutch chamber for filling the clutch chamber via the fluid line.

Abstract: A piston, comprising: a shaft side with a first circumferential groove, said first circumferential groove bounded by a continuous circumferential seal plateau, said seal plateau extending axially outward from said first circumferential groove, wherein a planar outboard surface extends radially outboard from said seal plateau; a clutch side having two grooves alternating with two lands; an inner circumferential surface having a seal groove formed therein; and an outer circumferential surface having a seal groove formed therein, wherein the sides and surfaces form a ring shape.

Abstract: A piston (50), comprising: •a shaft side (52) with a first circumferential groove, said first circumferential groove (90) bounded by a continuous circumferential seal plateau (88), said seal plateau extending axially outward from said first circumferential groove, wherein a planar outboard surface (96) extends radially outboard from said seal plateau; •a clutch side (54) having two grooves alternating with two lands (102, 108); •an inner circumferential surface (56) having a seal groove (62) formed therein; and an outer circumferential surface (58) with a having a seal groove (76) formed therein, wherein the sides and surfaces form a ring shape.

Abstract: A wet clutch assembly may have a clutch drum, a clutch chamber formed within the clutch drum, a clutch actuation piston movably disposed within the clutch drum and configured to be actuated via a hydraulic pressure in the clutch chamber. A fluid line may at least partially extend through the clutch actuation piston, where the fluid line provides fluid communication with the clutch chamber for filling the clutch chamber via the fluid line.