View source for 17835733. POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE simplified abstract (FORD GLOBAL TECHNOLOGIES, LLC)

=POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE=


==Organization Name==

[[:Category:FORD GLOBAL TECHNOLOGIES, LLC|FORD GLOBAL TECHNOLOGIES, LLC]]


[[Category:FORD GLOBAL TECHNOLOGIES, LLC]]

==Inventor(s)==

[[:Category:Michael Frey of Farmington Hills MI (US)|Michael Frey of Farmington Hills MI (US)]][[Category:Michael Frey of Farmington Hills MI (US)]]

[[:Category:Filip Tomik of Milford MI (US)|Filip Tomik of Milford MI (US)]][[Category:Filip Tomik of Milford MI (US)]]

[[:Category:Richard David Bruns of Milford MI (US)|Richard David Bruns of Milford MI (US)]][[Category:Richard David Bruns of Milford MI (US)]]

==POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE - A simplified explanation of the abstract==


This abstract first appeared for US patent application 17835733 titled 'POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE

==Simplified Explanation==

The patent application describes a vehicle with a primary and secondary axle, and a powertrain consisting of an engine connected to the primary axle and selectively connected to the secondary axle. The vehicle also includes a clutch associated with the secondary axle. 

* The powertrain can switch between two-wheel drive and four-wheel drive modes.
* The controller is programmed to override the engine-torque command and reduce the engine torque below a certain limit when shifting to four-wheel drive mode.
* The controller then commands the engagement of the clutch once the engine torque is below the limit.

== Potential Applications ==
* Off-road vehicles that require both two-wheel drive and four-wheel drive capabilities.
* Military vehicles that need to quickly switch between different drive modes based on terrain conditions.

== Problems Solved ==
* Ensures smooth shifting from two-wheel drive to four-wheel drive without damaging the clutch.
* Prevents excessive torque on the clutch when engaging it during the shifting process.

== Benefits ==
* Improved durability and longevity of the clutch system.
* Enhanced control and stability when transitioning between different drive modes.
* Increased efficiency and performance of the vehicle in various terrains.


==Original Abstract Submitted==

A vehicle includes a primary axle, a secondary axle, and a powertrain. The powertrain has an engine coupled to the primary axle and selectively coupled to the secondary axle. The vehicle also includes a clutch associated with the secondary axle. A controller is programmed to, responsive to (i) a request to shift from two-wheel drive to four-wheel drive and (ii) a current engine-torque command exceeding a torque limit associated with the clutch, override the current engine-torque command to reduce a torque of the engine below the torque limit, and, responsive to the torque of the engine being less the torque limit, command engagement of the clutch.



[[Category:B60W50/12]]
[[Category:B60W50/08]]