US 12,172,519 B2 · Oscillating torque strategy for wheel disconnect clutch

Abstract

A vehicle includes a primary axle powered by an actuator and a secondary axle powered by a motor and including a wheel and a clutch selectively coupling the wheel to the motor via mating components. A controller is electrically connected to the clutch and the motor. The controller is programmed to, in response to an engagement of the clutch being unsuccessful within a first duration of time, command a series of speeds to the motor based on wheel speed and an alternating offset that changes between positive and negative signs at predefined periods so that relative speeds between the mating components oscillate due to the alternating offset to jiggle the clutch into engagement.

Claims17

Dependent claims

A vehicle comprising:

a primary axle powered by an actuator;
a secondary axle powered by a motor and including a wheel and a clutch selectively coupling the wheel to the motor via mating components;
and
a controller electrically connected to the clutch and the motor and programmed to:
in response to an engagement of the clutch being unsuccessful within a first duration of time, command a series of speeds to the motor based on wheel speed and an alternating offset that changes between positive and negative signs at predefined periods so that relative speeds between the mating components oscillate due to the alternating offset to jiggle the clutch into engagement, wherein the series of speeds are further based on a fixed offset that has a positive value when the vehicle is accelerating and has a negative value when the vehicle is decelerating.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/743,586Filed 13 May 2022

Published

US 2023/0364990 A116 Nov 2023

Granted

24 Dec 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification26 codes

B60K 23/08
Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for: for changing number of driven…
F16H 61/04
Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid…
B60K 17/02
Arrangement or mounting of transmissions in vehicles: characterised by arrangement, location, or kind of clutch
B60K 17/356
For driving both front and rear wheels, e.g. four wheel drive vehicles: having fluid or electric motor, for driving one or more wheels

Oscillating torque strategy for wheel disconnect clutch

Life of this patent

Oscillating torque strategy for wheel disconnect clutch

Life of this patent

Abstract

Claims17