Hydrokinetic coupling apparatus, notably for motor vehicles

Details Hydrokinetic coupling apparatus, notably for motor vehicles Hydrokinetic coupling apparatus, notably for motor vehicles

1995-11-06

1997-11-25

Pitts, Andrea L.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 328, 192214, 464 68, F16D 3300

Patent

active

056901992

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

a) Field of the Invention
The present invention concerns hydrokinetic coupling apparatus, notably for motor vehicles, of the type having a housing capable of being rotatably locked to a driving shaft, a turbine wheel capable of being rotatably locked to a driven shaft and a locking clutch acting between the housing and the turbine wheel, the said clutch having a piston and a counter-piston associated with the housing.
b) Description of Related Art
Such an apparatus is described in the document U.S. Pat. No. 4,976,656.
In this document the piston belongs to a torsion damping device, whilst forming one of the guide washers for the latter.
This device also includes an internally fluted web for its rotatory connection with axial mobility with respect to a turbine hub integral with the turbine wheel.
Thus the piston is rotatably connected with axial mobility with respect to the turbine wheel.
More precisely, this turbine hub is capable of being rotatably locked to the input shaft of the gearbox.
Thus the housing forms the driving element of the hydrokinetic coupling apparatus and the turbine hub the driven element of the apparatus.
When the locking clutch is disengaged, the piston is not in contact with the counter-piston formed here by the housing. In this position the turbine wheel is driven by the impeller wheel by virtue of the circulation of the fluid contained in the housing.
Thus in this position the inertia of the locking clutch makes its effects felt, since the clutch is carried to a major extent by the turbine hub.
As a result this inertia makes its effects felt on the input shaft of the gearbox and therefore on the gear wheels in the latter.
In addition the hydrokinetic coupling apparatus is mounted in the kinematic chain extending from the internal combustion engine of the motor vehicle to the gearbox.
This system therefore has a resonant frequency which makes its effect felt at the normal running speed of the vehicle within the operating speed range of the thermal engine.
In the document EP-A-0 577 389, the piston is interposed axially between the turbine wheel and a mass, forming the counter-piston, pivotally mounted on the housing, and in that the mass is elastically coupled to the housing.
By virtue of this arrangement, when the clutch is disengaged the inertia due to the locking clutch is determined mainly by the piston and is therefore very low, so that the gear wheels in the gearbox are lightly stressed.
In addition, the response time for engaging and disengaging the clutch are reduced.
When the locking clutch is engaged, the mass makes its effects felt and the inertia increases so that the resonant frequency of the system in which the hydrokinetic coupling apparatus is mounted is reduced.
In this document EP-A-0 577 389, the mass includes a main element and a hollow cover for mounting springs forming elastic means with circumferential action forming part of a torsion damping device. The housing constitutes the input element of the torsion damping device, whilst the mass constitutes the output element of the device.
To this end, a plate rotatably fixed to the casing enters between the main element and the cover connected by riveting. This plate has recesses for the elastic means.
As a result the mass and the torsion damping device have a relatively complicated shape and the mass is lightened by the presence of the torsion damping device.
In addition, the main element is mounted at its inner periphery pivotally on a tubular nose carried so as to be fixed centrally on the housing. This element is also mounted pivotally on an annular projection on the housing.
This arrangement also complicates the shape of the mass is of such a nature as to perturb the rotation of the mass.


SUMMARY OF THE INVENTION

The object of the present invention is to mitigate these drawbacks in a simple and economical manner, whilst preserving the advantages of a large relative angular movement between the mass and the housing.
The object of the present invention is therefore to simplify the

REFERENCES:
patent: 2920728 (1960-01-01), Forster
patent: 4143561 (1979-03-01), Melborn
patent: 4867290 (1989-09-01), MacDonald et al.
patent: 4976656 (1990-12-01), Bacher et al.
patent: 5388678 (1995-02-01), Murata

Affiliated with

Also associated with

Rating

Hydrokinetic coupling apparatus, notably for motor vehicles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrokinetic coupling apparatus, notably for motor vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrokinetic coupling apparatus, notably for motor vehicles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2099752