US 11,651,633 B2 · System and method for estimating a clutch torque of an electronic limited slip differential and tire longitudinal forces

Abstract

A system includes a clutch state module and a clutch torque module. The clutch state module is configured to determine whether a clutch of an electronic limited slip differential is locked or unlocked. The electronic limited slip differential couples an engine of a vehicle to left and right wheels of the vehicle. The clutch torque module is configured to estimate an actual torque transferred by the clutch using a first clutch torque model when the electronic limited slip differential is unlocked, and estimate the actual clutch torque using a second clutch torque model when the electronic limited slip differential is locked. The second clutch torque model is different than the first clutch torque model.

Claims20

Dependent claims

A system comprising:

a clutch state module of a vehicle and configured to determine whether a clutch of an electronic limited slip differential is locked or unlocked, the electronic limited slip differential coupling an engine of a vehicle to left and right wheels of the vehicle;
and
a clutch torque module of the vehicle and configured to:
estimate an actual torque transferred by the clutch using a first clutch torque model when the electronic limited slip differential is unlocked;
and
estimate the actual clutch torque using a second clutch torque model when the electronic limited slip differential is locked, wherein the second clutch torque model is different than the first clutch torque model.

3 more elements

A system comprising:

a clutch state module of a vehicle and configured to determine whether a clutch of an electronic limited slip differential is locked or unlocked, the electronic limited slip differential coupling an engine of a vehicle to left and right wheels of the vehicle;
a clutch torque module of the vehicle and configured to:
estimate an actual torque transferred by the clutch using a first clutch torque model when the electronic limited slip differential is unlocked;
and
estimate the actual clutch torque using a second clutch torque model when the electronic limited slip differential is locked, wherein the second clutch torque model is different than the first clutch torque model;
and
a tire longitudinal force module configured to:
estimate tire longitudinal forces at the left and right wheels using a first longitudinal force model when the electronic limited slip differential is unlocked;
and
estimate the tire longitudinal forces at the left and right wheels using a second longitudinal force model when the electronic limited slip differential is locked, wherein the second longitudinal force model is different than the first clutch torque model.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/325,709Filed 20 May 2021

Published

US 2022/0383668 A11 Dec 2022

Granted

16 May 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

B60K 17/354
For driving both front and rear wheels, e.g. four wheel drive vehicles: having separate mechanical assemblies for transmitting drive to the front…
G07C 5/0808
Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working,…
B60K 17/20
Of differential gearing: in which the differential movement is limited
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

System and method for estimating a clutch torque of an electronic limited slip differential and tire longitudinal forces

Life of this patent

System and method for estimating a clutch torque of an electronic limited slip differential and tire longitudinal forces

Life of this patent

Abstract

Claims20