US 9,556,918 B2Granted

Clutch assembly

AssigneeLitens Automotive Partnership

InventorsZbyslaw Staniewicz, Bashar Yazigi, Scott D. Parsons, Jacek R. Stepniak, Roman Tracz

Life of this patent

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Abstract

In an aspect, a method is provided for controlling a clutch assembly having first and second rotatable clutch members. The method includes providing a wrap spring clutch having first and second ends. The phase angle between the first and second ends determines a diameter of the wrap spring clutch. One of the clutch members is connected with the first end. The method further includes obtaining a target value indicative of a target speed for the second clutch member, and determining through measurement an actual value that is indicative of an actual speed of the second clutch member. The method further includes changing the phase angle between the first and second ends of the wrap spring clutch to generate a selected amount of slip between the wrap spring clutch and the other of the first and second clutch members, based on the target value and the actual value.

Claims12

Dependent claims

A method for controlling a clutch assembly having a first clutch member that is rotatable about an axis and a second clutch member that is rotatable about the axis, comprising:

a) providing a wrap spring clutch having a first end, a second end and a plurality of helical coils between the first end and the second end, wherein a phase angle between the first and second ends determines a diameter of the wrap spring clutch, and wherein one of the first and second clutch members is connected with the first end of the wrap spring clutch;
b) obtaining a target value that is indicative of a target speed of the second clutch member;
c) determining through measurement an actual value that is indicative of an actual speed of the second clutch member;
and
d) changing the phase angle between the first and second ends of the wrap spring clutch to control slip between the wrap spring clutch and the other of the first and second clutch members, based on the target value and the actual value.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/781,831Filed 10 Apr 2014 · us provisional application
Priority: 10 Apr 2013
Published: US 2016/0040733 A111 Feb 2016
Granted: 31 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

F16D 48/064
Control by electric or electronic means, e.g. of fluid pressure: control of electrically or electromagnetically actuated clutches
B60K 25/02
Auxiliary drives: directly from an engine shaft
F16D 13/12
Friction clutches: with an expansible band or coil co-operating with the inner surface of a drum or the like
F16D 13/76
Friction clutches: specially adapted to incorporate with other transmission parts, i.e. at least one of the clutch parts also having another…

Family

Application61/810,613Us provisional application · filed 10 Apr 2013
Application61/819,244Us provisional application · filed 3 May 2013
Application61/819,368Us provisional application · filed 3 May 2013
US 2016/0040733 A1Pre-grant publication · published 11 Feb 2016
US 9,556,918 B2This patent

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