Clutch, in particular for motor vehicle, with pneumatic control
AssigneeValeo Embrayages
InventorsOlivier Doremus, Remi Trouyet
Life of this patent
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Abstract
The invention concerns a clutch, in particular for a motor vehicle, comprising an annular diaphragm (54) with concave clutch characteristic curve and a pneumatic actuator (76) acting on the diaphragm (54) for clutch release, means (86, 88) being provided to generate during clutch release a resistant force which supplements that developed by the diaphragm (54). The invention is particularly applicable to industrial vehicles equipped with a pressurized gas source.
Claims24
Clutch, in particular for a motor vehicle, comprising clutch-engaging means (54) suitable for exerting an axial gripping force on a friction disc (44) fixed rotation-wise to a driven shaft (50), and clutch-disengaging means comprising a pneumatic actuating device supplied with pressurised gas for exerting on the clutch-engaging means a clutch-disengaging force at least equal to a resisting force developed by these clutch-engaging means, characterised in that it also comprises means developing, during disengaging of the clutch, a second resisting force (F) opposite to the clutch-disengaging force and being added to the resisting force developed by the clutch-engaging means (54).
Clutch according to one of the preceding claims, characterised in that the resultant of the two resisting forces has a value which is substantially constant over a second part of the clutch-disengaging travel.
Clutch according to one of the preceding claims, characterised in that it is of the push or pull type.
Dependencies are inferred from the claim text.