Technoboost

Peugeot Citroen Automobiles Sa

Marc Giannoni

Armel Le Lievre

Pierre Dumoulin

Olivier Balenghien

Michael Wascheul

Aurelien Renault

Julien Berger

Stéphane Maurel

Franck Roy

Andres Yarce

Laurent Gagliardini

Michaël Wascheul

Aurélien Renault

Vicky Rouss

Victor Barbosa Pereira

Antonin Groult

Armel Le Lièvre

A gearbox (BV) comprises a secondary shaft (AS) provided with a synchromesh (SB) comprising a flange (FL) comprising a sub-hub (SM) fixedly secured to the secondary shaft (AS) and provided with external splines (CE), a hub (MO) comprising internal splines (CI) collaborating with the external splines (CE) of the sub-hub (SM) to allow translational movement with respect to the latter (SM), and a sleeve (MA) that can undergo a translational movement with respect to the hub (MO) so that the internal splines (CI) thereof are closely coupled to dogs (CR) of an idling pinion (PF). This translational movement of the hub (MO) with respect to the sub-hub (SM) guarantees close coupling of the internal splines (CI) of the sleeve (MA) with the dogs (CR) with a minimal margin for translation, irrespective of dimensional variations in the manufacture of the sleeve (MA) and idling pinion (PF).

Gearbox synchromesh, with a splined flange for the translational movement of the hub

The invention relates to a device which comprises a gear change fork (), a hydraulic cylinder including a stationary cylindrical spindle () with a stationary transverse wall () projecting from said spindle () and a piston that is translatably movable by sliding over said transverse stationary wall (). The piston consists of a piston body () closed by a radial closing part referred to as a 'plug' () so as to define two inner chambers () of the cylinder, which are situated on either side of said stationary transverse wall (), respectively. Means for pressurizing both of the two cylinder chambers () are provided for moving the movable piston () in one direction or another. In the device according to the invention, the piston body () is directly built into the gear shift fork () whereby, as a result of the pressure in a cylinder chamber (), it is the fork () that moves translatably.

Device for translatably controlling the movement of a gear change fork for a motor vehicle gearbox

Growing community of inventors

Paris, France

Marc Giannoni