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US 11,718,170 B2Granted
Vehicle transmission with disconnect device for power take in
AssigneeDana Belgium N.V.
InventorsKurt Cattoor, Filip D. Schacht
Life of this patent
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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.
Claims18
A vehicle transmission, comprising:
- a motive power source input interface configured to mechanically couple to a motive power source;
- a motor input interface configured to mechanically couple to an electric or hydraulic motor;
- a disconnect device releasably mechanically coupling the electric or hydraulic motor to the vehicle transmission, wherein the disconnect device is hydraulically actuated;
- and
- a hydraulic actuation system including a hydraulic actuator coupled to a splined sleeve;
- wherein the hydraulic actuator includes a piston with a hydraulic cavity therein that is profiled to mate with a pin to guide axial movement of the piston;
- wherein, in an engaged configuration of the hydraulic actuator, a hydraulic pressure maintains a hydraulic cylinder in an engaged position and a spring exerts a return force on the hydraulic cylinder;
- wherein the hydraulic actuation system is in fluidic communication with a hydraulic assembly driven by an internal combustion engine or a traction motor;
- and
- wherein responsive to a hydraulic pressure in the hydraulic assembly decreasing below a disconnect threshold value, a selector valve in the hydraulic actuation system changes to a disengagement state that initiates the transition of the hydraulic actuator from the engaged configuration to the disengaged configuration.
7 more elements
A vehicle transmission, comprising:
- a supplemental power source having an input shaft;
- and
- a first disconnect device coupled to the input shaft, including:
- a splined sleeve mated with the input shaft;
- and
- a hydraulic actuation system including a hydraulic actuator coupled to the splined sleeve, wherein the hydraulic actuator is configured to axially translate the splined sleeve in opposing directions to place the hydraulic actuator in an engaged configuration and a disengaged configuration;
- wherein, in the engaged configuration, the splined sleeve mates with a splined transmission shaft;
- wherein the hydraulic actuation system is configured to automatically transition the hydraulic actuator into the disengaged configuration responsive to a hydraulic pressure in the hydraulic actuation system decreasing below a threshold value;
- wherein, in the engaged configuration of the hydraulic actuator, a hydraulic pressure maintains a hydraulic cylinder in an engaged position and a spring exerts a return force on the hydraulic cylinder;
- and
- wherein:
- the hydraulic actuation system is in fluidic communication with a hydraulic assembly driven by an internal combustion engine or a traction motor;
- and
- responsive to a hydraulic pressure in the hydraulic assembly decreasing below a disconnect threshold value, a selector valve in the hydraulic actuation system changes to a disengagement state that initiates the transition of the hydraulic actuator from the engaged configuration to the disengaged configuration.
11 more elements
A method for operation of a vehicle transmission, comprising:
- automatically operating a first disconnect device to mechanically decouple a supplemental power source from the vehicle transmission when a pressure in a hydraulic actuation system coupled to the first disconnect device decreases below a threshold value, wherein the pressure in the hydraulic actuation system decrease below the threshold value in response to shutdown of an internal combustion engine that drives a hydraulic pump in the hydraulic actuation system;
- automatically operating a second disconnect device to mechanically decouple a drive axle from the vehicle transmission when a pressure in the hydraulic actuation system coupled to the second disconnect device decreases below a threshold value;
- wherein the first and second disconnect devices each include a splined sleeve mated with a shaft;
- wherein the hydraulic actuation system comprises a hydraulic actuator coupled to each of the splined sleeves;
- and
- wherein each of the hydraulic actuators is configured to axially translate the splined sleeve in opposing directions to place the hydraulic actuators in an engaged configuration and a disengaged configuration.
3 more elements
Dependencies are inferred from the claim text.