WO2012046122A1 - Unité de roulement pour couper et mettre le contact dans les automobiles et son procédé - Google Patents

Unité de roulement pour couper et mettre le contact dans les automobiles et son procédé Download PDF

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Publication number
WO2012046122A1
WO2012046122A1 PCT/IB2011/002334 IB2011002334W WO2012046122A1 WO 2012046122 A1 WO2012046122 A1 WO 2012046122A1 IB 2011002334 W IB2011002334 W IB 2011002334W WO 2012046122 A1 WO2012046122 A1 WO 2012046122A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing unit
automobile
ignition
engine
switching
Prior art date
Application number
PCT/IB2011/002334
Other languages
English (en)
Inventor
Vivek Kumar
Rohit Mattoo
Mathieu Hubert
Olivier Cheve
Alexis Gatesoupe
Benoit Locher
Original Assignee
Aktiebolaget Skf (Publ)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aktiebolaget Skf (Publ) filed Critical Aktiebolaget Skf (Publ)
Publication of WO2012046122A1 publication Critical patent/WO2012046122A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0833—Vehicle conditions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
    • F02N2200/0801—Vehicle speed
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • Embodiments of the invention generally relate to the field of start-stop systems in automobiles, and more particularly to use of a bearing unit in switching off and on ignition in automobiles.
  • a bearing unit for switching off and on ignition in automobiles and a method thereof is disclosed.
  • a bearing unit is used for switching off and on ignition in automobiles.
  • the bearing unit includes a first element and a second element which are rotatable against each other.
  • the first element and the second element are raceway elements and rolling bodies are arranged between the first element and the second element to form a rolling bearing.
  • the bearing unit also includes a device for detecting and analyzing at least rotation and non-rotation occurring between the first element and the second element. Depending on the result of the analyzing, an ignition of an automobile with a combustion engine is switched off.
  • the device is designed for measuring speed of the automobile and includes an electronic switch to switch off the ignition.
  • the device includes a magnetic target ring which is coupled to the rotating element and a sensor which is adapted to the magnetic target ring and coupled to the non rotating element.
  • the sensor and the switch forms one structural mechatronic unit.
  • the device is connectable wirelessly or via a cable to other components of the automobile.
  • the automobile may be a two wheeler, a three wheeler or a four wheeler and the like, and the bearing unit forms a part of a wheel hub of the automobile.
  • the device also switches on the ignition of the automobile after switching off the ignition.
  • FIG. 1 shows a cross-sectional view of a bearing unit for switching off and on ignition in an automobile, according to one embodiment
  • FIG. 2 shows an example wheel of a two wheeler where the bearing unit of FIG. 1 is deployed, according to one embodiment
  • FIG. 3 shows a process flow diagram of optimized stop of the automobile using the bearing unit of FIG. 1 , according to one embodiment
  • FIG. 4 shows a process flow diagram of restart of the automobile using the bearing unit of FIG. 1 , according to one embodiment
  • FIG. 5 shows a process flow diagram of switching on and off the bearing unit described in FIG. 1 , according to one embodiment.
  • a bearing unit for switching off and on ignition in automobiles and a method thereof is disclosed.
  • the following description is merely exemplary in nature and is not intended to limit the present invention, applications, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
  • FIG. 1 shows a cross-sectional view of a bearing unit for switching off and on ignition in an automobile, according to one embodiment.
  • the automobile may be a two wheeler, a three wheeler or a four wheeler.
  • the bearing unit includes a first element (the bearing inner ring 104) and a second element (the bearing outer ring 102) which are rotatable against each other.
  • the first element and the second element are raceway elements, where rolling bodies are arranged between the first element and the second element to form a rolling bearing.
  • the bearing unit also includes a device for detecting and analyzing at least rotation and non-rotation occurring between the first element and the second element. Depending on the result of the analyzing, the ignition of the automobile (with a combustion engine) is switched off and on.
  • the device includes an electronic switch 106 to switch off the ignition.
  • the device is designed for measuring speed of the automobile (using a sensor 116).
  • the device also includes a magnetic target ring 114 which is coupled to the intentionally rotating element and the sensor 116 which is adapted to the magnetic target ring 114 and coupled to the intentionally non rotating element.
  • the sensor 116 and the electronic switch 106 form one structural mechatronic unit.
  • the device is connectable wireless and/or via a cable to other components of the automobile. It should be noted that the bearing unit forms a part of a wheel hub of the automobile.
  • the bearing unit monitors movement of wheel of the automobile intrinsically. Based on conditions of no movement of automobile, signal indicating state of engine and/or engine rpm, the bearing unit sets up a time delay after which the engine management unit or the pulsar coil is grounded for a certain short time period. This results in the shutting off of the engine. This time delay may also be optimized based on gear position.
  • the automobile may have an engine management unit or a pulsar coil which allows switching off the ignition efficiently. To provide output to them (cutting off), this connection from the intuitive stop unit could be via existing wires which need to be tapped. This is done with the aid of standard automotive connectors.
  • the bearing unit measures the pulses (or lack of it) emanating from the roller bearing. These pulses are generated by the sensor 116 which gets excited by the movement of the magnetic target ring 114.
  • This magnetic target ring 114 is mounted on the roller bearing which is installed into the wheel hub of the automobile (as shown in FIG. 2).
  • the lack of pulses thus naturally denotes that the wheel is not moving and is a pre-condition for shutting of the engine.
  • the second condition is to monitor the engine rpm, as it is useful to shut off the engine only if it is already on.
  • the third condition is the time delay (before shutting off the engine). This can be a standard setting of 'x' seconds.
  • this can also be calculated based on the gear position.
  • the bearing unit allows shutting of in neutral gear (with lesser time delay) which suggests gradual stopping or low traffic. It also allows shutting off in gear as this is a common habit among two-wheeler riders. But this is achieved without the inconvenience of frequent stopping in heavy stop-go traffic. A longer time delay of stopping and a minimum time of stop between two stops are recorded, enabling this function. To stop the engine, the bearing unit needs to know if the engine is on and only then attempt to shut it.
  • FIG. 2 shows an example wheel of a two wheeler 202 where the bearing unit of FIG. 1 is deployed, according to one embodiment.
  • the bearing unit may be deployed in other automobiles such as three wheelers and four wheelers.
  • a sensor block 212 is attached to a bearing 206 and forms the bearing unit which is mounted on a wheel hub 204 of the two wheeler 202.
  • the bearing unit enables 6-10% fuel savings in the two wheeler 202 depending on city traffic conditions. Emissiosns released in the form of toxic gases during engine idling are eliminated in automobiles through use of the bearing unit.
  • the noise and vibration, both externally as vehicle noise and internally within the engine of the automobile are reduced, thus reducing part wear and increasing the overall life of engine.
  • FIG. 3 shows a process flow diagram 300 of optimized stop of the automobile using the bearing unit of FIG. 1 , according to one embodiment.
  • the bearing unit is on.
  • the bearing unit selects a smaller time delay, e.g., 6 seconds. This usually corresponds to user behavior indicating gradual stop or low traffic.
  • the bearing unit selects a larger time delay e.g., 12 seconds. This usually corresponds to user behavior indicating a short stop or heavy traffic where the user is anticipating frequent movement and does not want the engine shutting of frequently.
  • the bearing unit checks the time between two stops and if this falls to less than a predetermined value, say 30 seconds, the bearing unit disables itself from shutting of the motorcycle till some length of time elapses.
  • a predetermined value say 30 seconds
  • the bearing unit disables itself from shutting of the motorcycle till some length of time elapses.
  • the engine is stopped.
  • the throttle may be provisioned to reset the engine from stopping.
  • user of the automobile may receive warning (visual warning or by vibration of handle of the automobile) that the engine is stopping.
  • the bearing unit achieves stopping of the engine by several ways. In one example, it is achieved by grounding the signal from the engine management unit to the engine. This may also be done by grounding the signal from the pulsar coil. A third way exists by cutting the power supply to the engine management unit. For all these possibilities, the grounding is applied for at least a minimum time period (e.g., 1-2 seconds), to allow the rotary inertia of the magneto to fall sufficiently to a low value such that it does not restart the engine. If the bearing unit provides function other than starting, it can allow the start with a new condition. For example, for a stop and start system, the restart is allowed by the bearing unit only if the bearing unit has stopped the automobile previously. Another example is that the restart may be allowed only if the motorbike has stalled.
  • a minimum time period e.g., 1-2 seconds
  • the bearing unit may allow this function only if the engine is hot.
  • the automobile may have a thermal sensor and the bearing unit waits till a fixed temperature before stopping the engine.
  • the bearing unit may wait a fixed time after the first engine running or/and a determined distance of the automobile or/and a minimum speed of the vehicle (this new information can come from the vehicle displacement sensor, the wheel speed sensor, for example), before the engine is allowed to be shut off by the bearing unit.
  • sensor block does 112 of the bearing unit monitors a battery voltage state of the automobile. If it is detected that the voltage is falling below a certain predetermined value deemed as the low voltage point of the battery, the sensor block does 112 disables the shutting off of the engine, allowing time for the battery to recharge. For example if the battery voltage is under 9V whereas the normal voltage value is 12V, the bearing unit disables the engine stop to preserve the battery.
  • FIG. 4 shows a process flow diagram 400 of restart of the automobile using the bearing unit of FIG. 1 , according to one embodiment.
  • Throttle signal from the throttle sensor is used in restarting the automobile.
  • the bearing unit is on.
  • step 410 it is determined whether the predetermined time has reached when the clutch is on, neutral on and the engine off. If it is determined so, at step 412, the throttle sensor or a switch is closed. At step 414, it is determined whether the engine speed is above 1000 rotations per minute (rpm). If not, the process 400 waits until the engine speed is above lOOOrpm and at step 416, the switch is opened when the engine speed goes above l OOOrpm. The starter motor starts not only when the starter button is activated but also if the user accelerate.
  • the automobile must have the throttle sensor (or switch) given an indication of the activation or not of the throttle by the user.
  • This sensor could be an instrumented carburettor or a slide switch.
  • signal from the throttle sensor is measures. If the signal is linear in function of the throttle opening, the bearing unit allows the restart after fixed voltage amplitude. If the sensor is a switch, the bearing unit allows the restart after a switch commutation.
  • the bearing unit determines whether the engine is running or not in different ways.
  • the pulsar coil intensity is measured which gives the top turn information for the engine management unit.
  • the engine rpm is measured from the engine management unit. It is an electrical signal to the dashboard to indicate the engine speed.
  • the current safety system for an electric restart system is not modified and perturbed. This safety purpose is composed with different switch to allow the restart only in safe condition when clutch pressed if the gearbox is not in neutral and in neutral position.
  • the bearing unit measures the variation of the engine speed when only the electrical motor turns and when the engine is in idle speed. For that, the engine speed information is obtained from the pulsar coil or form the engine management unit, one pulse per turn. The main goal is to cut the electric motor supply when the engine is idling.
  • the bearing unit allows a limited number of restart trying. For example, the bearing unit allows 3 restarts trying with the intuitive restart function, each trying lasts 2 seconds. Also, if the bearing unit provides other function than the restarting, it can allow the start with a new condition. For example for a stop and start system, the restart is allowed by the system only if the system has stopped the vehicle previously. In another example, the restart is allowed if the motorbike has stalled.
  • the bearing unit may allow this function only if the engine is hot. For that, the automobile should have a thermal sensor and the bearing unit waits a fixed temperature. Without this sensor, the bearing unit may wait a fixed time after the first engine running, a determined distance of the vehicle or/and a minimum speed of the vehicle (for example, this new information is obtained from the vehicle displacement sensor, the wheel speed sensor). To prevent battery problem, the bearing unit allows the restart of the automobile only if the battery voltage is greater than a fixed value. For example, if the battery voltage is under 9V whereas the normal voltage value is 12V, the bearing unit disables this intuitive restart to preserve the battery.
  • FIG. 5 shows a process flow diagram 500 of switching on and off the bearing unit described in FIG. 1 , according to one embodiment.
  • ignition key signal is started.
  • the bearing unit continuously checks the signal from the power ignition key in order to switch off the microcontroller and save data when the user shuts of the automobile. This signal level variation can be used to send information or request to the microcontroller.
  • logic can be programmed in the microcontroller to translate the variation of this signal level into actions.
  • step 504 it is determined whether the ignition is toggled twice in a predetermined time. If it is determined not, the process is routed back; else at step 506, the status of the bearing unit is determined. If the status is active, at step 508, the bearing unit is deactivated. If the status is non active, the bearing unit is activated at step 510. Once the status of bearing unit is changed, it is stored in a variable in the system non-volatile memory. This variable is persistent across reboots.
  • signal from the brake lever can be used to activate and deactivate the bearing unit.
  • There are two states signal sending the information that the user presses the brake lever (it is used for example to switch on the vehicle lights). The same principle can be used, in detecting a predetermined sequence of pressing on the brake lever or a combination of several actions. An additional can be added to provide not only the activation and deactivation function but also the possibility to choose between several modes of functioning.
  • the bearing unit can replace existing wheel bearing and speed sensor without any change in the wheel design. There occurs no contact between the speed sensor and the wheel of the automobile, thereby avoiding friction.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

L'invention décrit une unité de roulement pour couper et mettre le contact dans les automobiles et son procédé. Dans un mode de réalisation à titre d'exemple, une unité de roulement comprend un premier élément et un second élément qui peuvent tourner l'un contre l'autre. L'unité de roulement comprend aussi un dispositif pour détecter et analyser au moins la rotation et la non-rotation se produisant entre le premier élément et le second élément. En fonction du résultat de l'analyse, le contact d'une automobile avec un moteur à combustion est coupé.
PCT/IB2011/002334 2010-10-05 2011-10-05 Unité de roulement pour couper et mettre le contact dans les automobiles et son procédé WO2012046122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2389/DEL/2010 2010-10-05
IN2389DE2010 2010-10-05

Publications (1)

Publication Number Publication Date
WO2012046122A1 true WO2012046122A1 (fr) 2012-04-12

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PCT/IB2011/002334 WO2012046122A1 (fr) 2010-10-05 2011-10-05 Unité de roulement pour couper et mettre le contact dans les automobiles et son procédé

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013203390B3 (de) * 2013-02-28 2014-07-03 Schaeffler Technologies Gmbh & Co. Kg Verfahren und Vorrichtung zum Ansteuern eines Fahrzeugs
WO2015117671A1 (fr) 2014-02-07 2015-08-13 Aktiebolaget Skf Système de démarrage et d'arrêt pour un véhicule automobile équipé dudit système
WO2015117670A1 (fr) 2014-02-07 2015-08-13 Aktiebolaget Skf Support de capteur, ensemble capteur le comprenant et procédé de fabrication associé
CN113669375A (zh) * 2021-09-02 2021-11-19 武汉联影医疗科技有限公司 动压滑动轴承的使用情况确定方法、***、装置
US11703089B2 (en) 2021-05-17 2023-07-18 Aktiebolaget Skf Sensor bearing assembly
US11746829B2 (en) 2021-05-17 2023-09-05 Aktiebolaget Skf Sensor bearing assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053046A (en) * 1995-02-09 2000-04-25 Denso Corporation Rotational speed detector for vehicle wheel with sensor device and integrally formed axle cover
US20030057903A1 (en) * 2001-09-26 2003-03-27 S.N.R. Roulements Device for controlling an electronically commutated motor
FR2852464A1 (fr) * 2003-03-12 2004-09-17 Skf Ab Dispositif de commutation, palier a roulement et moteur electrique utilisant un tel dispositif
US20050178594A1 (en) * 2004-02-17 2005-08-18 Tomokazu Yamauchi Drive system and automobile
US20060257061A1 (en) * 2005-05-13 2006-11-16 Shohei Nakamura Rolling bearing
US20100172605A1 (en) * 2007-02-14 2010-07-08 Schaeffler Kg Rolling bearing device comprising an integrated sensor system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053046A (en) * 1995-02-09 2000-04-25 Denso Corporation Rotational speed detector for vehicle wheel with sensor device and integrally formed axle cover
US20030057903A1 (en) * 2001-09-26 2003-03-27 S.N.R. Roulements Device for controlling an electronically commutated motor
FR2852464A1 (fr) * 2003-03-12 2004-09-17 Skf Ab Dispositif de commutation, palier a roulement et moteur electrique utilisant un tel dispositif
US20050178594A1 (en) * 2004-02-17 2005-08-18 Tomokazu Yamauchi Drive system and automobile
US20060257061A1 (en) * 2005-05-13 2006-11-16 Shohei Nakamura Rolling bearing
US20100172605A1 (en) * 2007-02-14 2010-07-08 Schaeffler Kg Rolling bearing device comprising an integrated sensor system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013203390B3 (de) * 2013-02-28 2014-07-03 Schaeffler Technologies Gmbh & Co. Kg Verfahren und Vorrichtung zum Ansteuern eines Fahrzeugs
WO2014131383A1 (fr) 2013-02-28 2014-09-04 Schaeffler Technologies AG & Co. KG Procédé et dispositif de commande d'un véhicule
WO2015117671A1 (fr) 2014-02-07 2015-08-13 Aktiebolaget Skf Système de démarrage et d'arrêt pour un véhicule automobile équipé dudit système
WO2015117670A1 (fr) 2014-02-07 2015-08-13 Aktiebolaget Skf Support de capteur, ensemble capteur le comprenant et procédé de fabrication associé
US11703089B2 (en) 2021-05-17 2023-07-18 Aktiebolaget Skf Sensor bearing assembly
US11746829B2 (en) 2021-05-17 2023-09-05 Aktiebolaget Skf Sensor bearing assembly
CN113669375A (zh) * 2021-09-02 2021-11-19 武汉联影医疗科技有限公司 动压滑动轴承的使用情况确定方法、***、装置

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