US 8,793,057 B2Granted

Bounded vehicle driveline twist estimating

AssigneeFord Global Technologies, LLC

InventorsAlexander P. McDonnell, Terry G. Feldpausch, Bradley D. Riedle, Jeffrey A. Doering, Peter D. Kuechler, John E. Rollinger, David H. Schmitt

Life of this patent

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Abstract

A method for controlling a vehicle driveline having a power source and a transmission clutch includes using a difference between two spaced locations in the subject vehicle driveline to determine driveline twist speed due to applied torque, using a product of driveline twist speed and a sampling interval to produce an estimated driveline twist from the sum of incremental changes in driveline twist that are between predetermined upper and lower magnitudes, producing, in response to a demanded wheel torque, a first signal that controls torque transmitted from the power source to the clutch during a lash crossing using the estimated driveline twist and the current driveline torque; and producing a second signal that controls clutch torque capacity such that clutch slip is produced during the lash crossing.

Claims14

Dependent claims

A method for controlling a subject vehicle driveline, comprising:

(a) empirically determining upper and lower magnitudes of first estimated driveline twist due a range of applied torque;
(b) a controller using a difference between two spaced locations in the subject vehicle driveline to determine driveline twist speed due to applied torque;
(c) the controller using a product of driveline twist speed and a sampling interval to produce a second estimated driveline twist as a sum of incremental changes in driveline twist that are between said upper and lower magnitudes;
(d) using the first estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque is negative and has a magnitude indicating that a lash event is remote;
(e) using the second estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque has a magnitude indicating that a lash event is imminent;
and
(f) using the first estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque is positive and has a magnitude indicating that a lash event is remote.

4 more elements

A method for controlling a vehicle driveline having a power source and a transmission clutch, comprising:

(a) a controller using a difference between two spaced locations in the vehicle driveline to determine driveline twist speed due to applied torque;
(b) the controller using a product of driveline twist speed and a sampling interval to produce an estimated driveline twist from a sum of incremental changes in driveline twist that are between a upper magnitude and a lower magnitude;
(c) the controller producing, in response to a demanded wheel torque, a first signal that controls torque transmitted from the power source to the clutch during a lash crossing using the estimated driveline twist and a current driveline torque;
and
(d) the controller producing a second signal that controls clutch torque capacity such that clutch slip is produced during the lash crossing.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/709,444Filed 10 Dec 2012 · continuation in part
Priority: 1 Nov 2010
Published: US 2013/0096789 A118 Apr 2013
Granted: 29 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

B60W 10/04
Conjoint control of vehicle sub-units of different type or different function: including control of propulsion units
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/06
Including control of propulsion units: including control of combustion engines
B60W 10/113
Stepped gearings: with two input flow paths, e.g. double clutch transmission selection of one of the torque flow paths by the corresponding input…

Family

Application12/916,831Parent of this continuation-in-part · filed 1 Nov 2010
US 2013/0096789 A1Pre-grant publication · published 18 Apr 2013
US 8,332,111 B2Parent of this continuation-in-part
US 2012/0109477 A1Published application
US 8,793,057 B2This patent

From the US filing history. Foreign family members aren’t listed.