Device for hydraulic control of a clutch and associated vehicle

Patent metadata

Field	Value
Publication number	US-2016252145-A1
Application number	US-201415029539-A
Country	US
Kind code	A1
Filing date	Oct 1, 2014
Priority date	Oct 16, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

A device for hydraulic control of a clutch for a motor vehicle, including a master cylinder controlled by a clutch pedal, a mechanism supplying the master cylinder with hydraulic fluid, a receiving cylinder for actuation of the clutch, the master cylinder linked to the receiver cylinder by a hydraulic pipe, the cylinder for actuation of the clutch being positioned in a rear of the vehicle and the pedal and the master cylinder being placed at a front of the vehicle, the hydraulic pipe linking the front and rear of the vehicle including a plurality of pipe offset devices along its length to encourage return of air bubbles to the mechanism supplying the master cylinder with hydraulic fluid.

First claim

1 - 10 . (canceled)

11 . A device for hydraulic control of a clutch for a motor vehicle, comprising:
a master cylinder controlled by a clutch pedal; means for supplying the master cylinder with hydraulic fluid; a slave cylinder for actuation of the clutch, the master cylinder being linked to the actuating slave cylinder by a hydraulic pipe, wherein the slave cylinder for actuation of the clutch is positioned in a rear of the vehicle and the pedal and the master cylinder are placed at a front of the vehicle and the hydraulic pipe linking the rear to the front of the vehicle comprises a plurality of pipe offset devices along its length, the pipe offset device configured to trap air bubbles present in the hydraulic pipe and the plurality of pipe offset devices configured to promote rising of air bubbles as far as the means for supplying the master cylinder with hydraulic fluid.

12 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , wherein the offset device includes an upstream tubular portion and a downstream tubular portion, which are successive and in communication, each tubular portion having a radius and a separate central axis in a same direction, a distance between two central axes of the tubular portions being less than the sum of the radii of the successive upstream and downstream tubular portions so that outer surfaces of the tubular portions have an overlapping area.

13 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 12 , wherein the two tubular portions of the offset device communicate by a common recess formed in a lower part of the outer surface of the upstream tubular portion and in an upper part of the outer surface of the downstream tubular portion, via which the hydraulic fluid circulates.

14 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 13 , wherein the recess has a width which is greater than or equal to the sum of the radii of the upstream and downstream tubular portions.

15 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , wherein the hydraulic pipe comprises at least two successive offset devices in a same longitudinal plane of the vehicle, one of the offset device located in vicinity of the pedal being higher than one of the offset device located in vicinity of the slave cylinder.

16 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , comprising at least three successive offset devices.

17 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , comprising at least four successive offset devices.

18 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , wherein the pipe portion connecting two successive offset devices comprises a volume of hydraulic fluid of between 70 and 90% of volume of hydraulic fluid displaced when pressing on the pedal.

19 . The device for hydraulic control of a clutch for a motor vehicle as claimed in claim 11 , further comprising a length of pipe portion between two successive offset modules between 400 mm and 600 mm.

20 . A vehicle comprising a device for hydraulic control of a clutch as claimed in claim 11 .

Assignees

• Renault Sa

Inventors

• Janier Benoit
• Blondeau Vincent

Classifications

• F16D48/04 Primary

  providing power assistance · CPC title

• B60K23/02 Primary

  for main transmission clutches · CPC title

• F16D2048/0224

  Details of conduits, connectors or the adaptors therefor specially adapted for clutch control · CPC title

• F16D2048/023

  by pedal actuation · CPC title

• F16D2048/026

  The controlling actuation is directly performed by the pressure source, i.e. there is no intermediate valve for controlling flow or pressure · CPC title