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US 8,554,441 B1Granted
Phasing of traction control based on vehicle speed and road slope
Assigneee-AAM Driveline Systems AB
InventorsMartin Johansson, Matilda Hallnor
Life of this patent
Estimating the term…
Abstract
A traction control system and methodology that utilize a phase-out and phase-in of maximum drive torque and/or a regenerative brake torque based on vehicle speed and road slope.
Claims23
A method for controlling transmission of power to a set of vehicle wheels, the method comprising:
- providing a drive module for powering the set of vehicle wheels;
- determining by a processor a slope of a surface on which the drive module is operating;
- determining by the processor a speed at which the drive module is operating on the surface;
- determining by the processor a maximum drive torque to transmit to the set of vehicle wheels, the maximum drive torque being determined based at least partly on the determined slope and the determined speed when the determined speed is within a predetermined range of determined speeds and the determined slope is within a predetermined range of determined slopes;
- and
- transmitting power to the set of vehicle wheels such that the rotary power applied to each of the vehicle wheels of the set of vehicle wheels does not exceed the maximum drive torque.
3 more elements
A controller for a drive module that is configured to drive a pair of vehicle wheels, the controller being configured to:
- determine a slope of a surface on which the drive module is operating;
- determine a speed at which the drive module is operating on the surface;
- determine a maximum drive torque to transmit to the set of vehicle wheels, the maximum drive torque being determined based at least partly on the determined slope and the determined speed when the determined speed is within a predetermined range of determined speeds and the determined slope is within a predetermined range of determined slopes;
- and
- control transmission of rotary power output from the drive module such that the rotary power output from the drive module does not exceed the maximum drive torque.
2 more elements
A drive module comprising:
- a differential assembly;
- an electric propulsion motor that is configured to drive the differential assembly;
- a pair of output members at least partly driven by the differential assembly;
- a pair of axle shafts, each axle shaft being drivingly coupled to a corresponding one of the output members;
- and
- a controller for controlling a maximum drive torque transmitted through the axle shafts, the controller being configured to determine a slope of a surface on which the drive module is operating;
- determine a speed at which the drive module is operating on the surface;
- determine a maximum drive torque to transmit to the set of vehicle wheels, the maximum drive torque being determined based at least partly on the determined slope and the determined speed when the determined speed is within a predetermined range of determined speeds and the determined slope is within a predetermined range of determined slopes;
- and control transmission of rotary power output from the drive module such that the rotary power transmitted through the axle shafts does not exceed the maximum drive torque.
6 more elements
A method for controlling transmission of power to a set of vehicle wheels, the method comprising:
- providing a drive module for powering the set of vehicle wheels;
- determining by a processor a slope of a surface on which the drive module is operating;
- determining by the processor a speed at which the drive module is operating on the surface;
- determining by the processor a maximum regenerative braking torque to transmit to the set of vehicle wheels, the maximum regenerative braking torque being determined based at least partly on the determined slope and the determined speed when the determined speed is within a predetermined range of determined speeds and the determined slope is within a predetermined range of determined slopes;
- and
- operating an electric motor in the drive module to transmit rotary power to the set of vehicle wheels such that a regenerative braking torque applied to each of the vehicle wheels of the set of vehicle wheels does not exceed the maximum regenerative brake torque.
3 more elements
Dependencies are inferred from the claim text.