EP3948025A1 - Boitier et differentiel de transmission automobile avec capteur de vitesse a effet hall - Google Patents
Boitier et differentiel de transmission automobile avec capteur de vitesse a effet hallInfo
- Publication number
- EP3948025A1 EP3948025A1 EP20711822.5A EP20711822A EP3948025A1 EP 3948025 A1 EP3948025 A1 EP 3948025A1 EP 20711822 A EP20711822 A EP 20711822A EP 3948025 A1 EP3948025 A1 EP 3948025A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- differential
- sensor
- screws
- rim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 230000005355 Hall effect Effects 0.000 title claims description 5
- 230000006978 adaptation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/40—Constructional details characterised by features of the rotating cases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H2048/385—Constructional details of the ring or crown gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
Definitions
- the present invention relates to the field of transmissions and the acquisition of speed information on a rotating element, intended for a transmission or powertrain calculation unit (GMP).
- GMP transmission or powertrain calculation unit
- It relates in particular to the arrangement of a speed target on a differential case.
- the invention relates to a motor vehicle transmission differential housing rotating in a housing, comprising a drive ring mounted on an annular rim fixed against a flat rim of the housing by a set of screws engaged through rim and rim.
- the present invention also relates to a transmission differential comprising a casing and a casing rotating in this casing.
- a transmission especially a hybrid transmission
- data relating to the speed or rotational speed of some of the rotating components is required to drive with precision the different power sources, thermal and electrical, which are connected to a common assembly.
- These sources must in particular be controlled in torque and / or in speed, in order to effect gear changes without a clutch. Only a perfect synchronization of the gearbox shafts can ensure the reliability and comfort of passage required.
- the speed measurement system In order to have precise information on the rotational speeds of the shafts of the box, or of other rotating parts, the speed measurement system generally consists of a fixed scroll sensor and a target rotationally linked to a. rotating part which passes in front of the sensor.
- the target is generally in the form of a set of teeth distributed over the circumference of a rotating part, which is integral in rotation with the component whose speed is to be measured.
- Information is taken conventionally on the crown of the differential.
- This arrangement illustrated in particular by publication FR 3 049 323, makes it possible to know the speed of the secondary shaft of the gearbox, which is directly linked to the ring gear.
- the measurement is precise thanks to the large diameter of the crown, which is used to install the counting teeth which pass in front of the fixed sensor.
- the target can be fitted and shrunk onto the crown of the bridge.
- the target has a tendency to deform and to detach from the crown. Welding points are then necessary to strengthen the connection between the target and the crown, and to keep the target in position on the latter.
- the present invention aims to overcome these assembly constraints, while benefiting from the large diameter of the differential crown to implant the speed target.
- the screws for fixing the crown to the differential case when passing in front of a fixed point on the case, trigger signals identifiable by a sensor.
- the set of screws for fixing the crown to the case thus constitutes a rotating magnetic target passing in front of a fixed sensor.
- FIG. 1 is a sectional view of the transmission.
- FIG. 2 is an exterior view of the differential crown.
- FIG. 3 is a diagram of the proposed differential.
- the differential housing 10 of FIG. 1 is enlarged in FIG. 3. It rotates in the mechanism housing 2, and comprises a drive crown 8.
- the crown 8 is mounted on its annular rim 8b, which bears against the flat rim 13 of the housing, by all the fixing screws 11 engaged through the rim 8b and the flange 13.
- the fixing screws 11 pass in front of the fixed sensor 12, fixed on the casing 2.
- Figure 3 shows in section a part of the housing 10, of the crown 8 of FIG. 2, and one of its 10 fixing screws 11, facing the sensor 12.
- the latter is preferably a magnetic sensor 12, with a Hall effect. It is fixed to the outside of the mechanism housing 2, and partially penetrates inside the housing 10, in line with the fixing screws 11.
- the sensor 12 is oriented parallel to the axis of the differential.
- the screws 11 trigger, by passing in front of this fixed point, signals identifiable by the sensor 12.
- the air gap between the sensor and the head of the fixing screws 11 is preferably between 0.5 and 5 mm.
- the screws 11 When the housing rotates, the screws 11 pass in front of the sensor 12, and constitute a rotating target for the latter. As they pass in front of this fixed point, they trigger signals that can be identified by the sensor 12.
- the crown 8 has, for example, ten screws for fixing to the rim of the case, but this number is in no way limiting.
- the signals detected by the sensor 12 are used by a computing unit to determine the speed of rotation of the housing.
- the set of screws 11, of the sensor 12 and of its calculation unit constitute a particularly reliable tachometer, the information of which can be used in controlling the gearbox. gears and powertrain.
- the invention makes it possible to have a digital hall-effect tachometer that is particularly reliable and economical, since it does not require any modification of the structure of the differential.
- Signal pick-up is as reliable and repeatable as with previous adaptations.
- the regular movement of the fixing screws in front of the sensor guarantees the repeatability of the variations of the magnetic signal detected by the sensor, without risk of disturbance during operation.
- the elimination of an intermediate part, such as the old target fixed on the rim allows an economic gain, a saving of time of assembly of the differential, and a saving of space in the gearbox. Supply logistics and the management of after-sales parts also benefit from this simplification.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1903393A FR3094436B1 (fr) | 2019-03-29 | 2019-03-29 | Boitier et differentiel de transmission automobile avec capteur de vitesse a effet hall |
PCT/EP2020/055931 WO2020200641A1 (fr) | 2019-03-29 | 2020-03-05 | Boitier et differentiel de transmission automobile avec capteur de vitesse a effet hall |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3948025A1 true EP3948025A1 (fr) | 2022-02-09 |
Family
ID=67384043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20711822.5A Withdrawn EP3948025A1 (fr) | 2019-03-29 | 2020-03-05 | Boitier et differentiel de transmission automobile avec capteur de vitesse a effet hall |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3948025A1 (fr) |
FR (1) | FR3094436B1 (fr) |
WO (1) | WO2020200641A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230008955A1 (en) | 2021-07-09 | 2023-01-12 | Rivian Ip Holdings, Llc | Position-based lubrication control strategy for disconnect differential |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19723839B4 (de) * | 1996-06-18 | 2006-09-21 | Volkswagen Ag | Ausgleichsgetriebe |
JPH11118818A (ja) * | 1997-10-14 | 1999-04-30 | Toyota Autom Loom Works Ltd | 車両における回転数検出用センサの取付構造及び歯車 |
FR2932543B1 (fr) * | 2008-06-17 | 2010-05-28 | Renault Sas | Boitier de differentiel pour un vehicule automobile a quatre roues motrices |
FR3049323B1 (fr) | 2016-03-24 | 2019-06-14 | Renault S.A.S. | "couronne de differentiel equipee d'une cible de mesure de sa vitesse de rotation et agencement dans une boite de vitesses" |
-
2019
- 2019-03-29 FR FR1903393A patent/FR3094436B1/fr active Active
-
2020
- 2020-03-05 EP EP20711822.5A patent/EP3948025A1/fr not_active Withdrawn
- 2020-03-05 WO PCT/EP2020/055931 patent/WO2020200641A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020200641A1 (fr) | 2020-10-08 |
FR3094436A1 (fr) | 2020-10-02 |
FR3094436B1 (fr) | 2021-07-23 |
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Legal Events
Date | Code | Title | Description |
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Owner name: RENAULT S.A.S |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
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P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230608 |
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20231111 |