WO2014155311A1 - Système d'alignement central des roues d'un véhicule et son procédé - Google Patents

Système d'alignement central des roues d'un véhicule et son procédé Download PDF

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Publication number
WO2014155311A1
WO2014155311A1 PCT/IB2014/060174 IB2014060174W WO2014155311A1 WO 2014155311 A1 WO2014155311 A1 WO 2014155311A1 IB 2014060174 W IB2014060174 W IB 2014060174W WO 2014155311 A1 WO2014155311 A1 WO 2014155311A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
steering
wheels
control unit
interfaced
Prior art date
Application number
PCT/IB2014/060174
Other languages
English (en)
Other versions
WO2014155311A4 (fr
Inventor
Deepak R R
Manoj WALKIKAR
Thukaram SHETTY
Sunil KHACHANE
Original Assignee
Tata Motors Limited
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 Tata Motors Limited filed Critical Tata Motors Limited
Publication of WO2014155311A1 publication Critical patent/WO2014155311A1/fr
Publication of WO2014155311A4 publication Critical patent/WO2014155311A4/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/027—Parking aids, e.g. instruction means

Definitions

  • the present disclosure generally relates to a steering system of a vehicle.
  • An embodiment of the disclosure discloses a system for centre-alignment of the vehicle wheels automatically with respect to steering in parking condition.
  • the drivers/users will park the vehicles by keeping the front wheels in angled position.
  • the wheel angle is not known to the driver unless the driver peeps out of the window or comes out of the vehicle.
  • the visibility of the wheel angle in dark conditions, example during night, to know the wheel angle/position is also difficult.
  • This inclined position of the wheel in the parked condition may cause problem during initial vehicle movement, and also the inclined wheels may hit another vehicle due to its projection outside the vehicle envelope. So it becomes necessary to align the wheel to straight ahead position in the parking condition of the vehicle if the driver/user forgets to do so.
  • US Patent No.: US 8,406,958 (herein after referred as '958 patent).
  • the system disclosed in the '958 patent receives signal from the driver activated switch for centre alignment of wheels in parked condition. Then, the system detects a steering angle and aligns a wheel with the center by controlling an MDPS motor through a motor angular velocity and a motor current, after a vehicle having the MDPS mounted therein is parked.
  • the driver has to activate the switch for requesting the self- alignment of wheels when the vehicle is in parked condition.
  • this leads to errors, since the driver may or may not activate the switch for self-alignment of wheels.
  • the conventional/known system fails to solve the problem completely, since the wheels will be still in steered condition if the driver forgets to activate the switch.
  • One object of the present disclosure is to provide for centre align of vehicle wheels in parking condition in which vehicle wheels will be aligned automatically without a manual intervention.
  • a method for center alignment of wheels of a vehicle comprising acts of, receiving a signal by a control unit for locking the vehicle, then detecting steering wheel angle to determine whether the steering shaft is in steered position. Further, the method includes act of operating a motor coupled to a steering mechanism of the vehicle by the control unit to rotate the steering mechanism for center alignment of the wheels. In an embodiment of the present disclosure, the steering wheel angle is detected using steering wheel angle sensor.
  • the method comprises act of detecting an engine rest condition of the vehicle.
  • the engine rest condition is when the engine rpm is zero.
  • the method comprises act of detecting vehicle stop condition.
  • the vehicle stop condition is when the wheel speed is zero.
  • the method comprises act actuation of a solenoid coil retracts a plunger from a steering housing to allow rotation of the steering mechanism.
  • the method comprises act determining torque on the steering wheel is within a predetermined limit.
  • a system for centre alignment of wheels of a vehicle comprises a control unit configured to detect locking of the vehicle.
  • a steering wheel angle sensor interfaced with the control unit to determine whether the steering shaft is in steered position.
  • the system further includes a motor coupled to a steering mechanism of the vehicle is interfaced with the control unit to rotate the steering mechanism for centre alignment of wheels when locking of the vehicle and steered position of the steering shaft is detected.
  • the system comprises, engine speed sensor is interfaced with the control unit for detecting engine rest condition.
  • the system comprises, vehicle speed sensor is interfaced with the control unit.
  • the system comprises, a solenoid coil in the steering system for actuating a plunger.
  • the solenoid coil will be interfaced with the controller. Further, the solenoid coil retracts the plunger form a steering housing when locking of the vehicle and inclined position of the steering shaft is detected control unit.
  • control unit is an Electronic Control unit (ECU).
  • ECU Electronic Control unit
  • FIG. 2a-2c illustrates the Ignition key switch having a solenoid with lock plunger in three different conditions.
  • FIG. 1 is an exemplary embodiment of the present disclosure which illustrates the schematic diagram of a system for center alignment of wheels of a vehicle showing interconnections with parts of the vehicle.
  • a steering wheel (1) of the vehicle is mechanically connected to the steering shaft (7) which is in turn coupled to wheels (8) through rack and pinion arrangement (not shown) for steering the wheels (8) of the vehicle.
  • a steering angle sensor (3) and a steering torque sensor (4) are mounted on steering shaft (7) of a steering mechanism.
  • the steering angle sensor (3) is configured to detect the angle of steering wheel to determine whether the steering wheel is in neutral position or steered position.
  • the system also comprises, a torque sensor mounted on the steering shaft (7) for determining the torque on the steering shaft.
  • steering system is an electronic power steering system which includes an electrical motor (6) coupled to the steering shaft.
  • the motor is configured to rotate the steering shaft either in clockwise or in anticlockwise direction for steering the wheels.
  • the motor (6) is interfaced with a motor controller (5), which is in turn electrically connected to the electronic control unit of [ECU] (11) of the vehicle.
  • the ECU (11) is configured to provide signal to the motor controller (5) for operating the motor (6).
  • the Electronic Control unit (11) is interfaced with the steering wheel angle sensor, and the toque sensor for receiving the steering wheel angle and torque signal respectively.
  • the ECU (11) is also configured to communicate with an engine speed sensor (10) which is mounted on the vehicle Gear box (9) for determining the speed of engine, and vehicle speed sensor to determine speed of the wheels.
  • the ECU (11) is also configured to receive signal which is used to determine locking the vehicle. When the ECU (11) detects the signal for locking the vehicle in one embodiment the ECU determines whether the vehicle speed is zero. Then the ECU activates the system to centre align the wheels of the vehicle if the driver forget to do the same.
  • the ECU (11) may be configured receive request to lock the vehicle from a central locking unit (13). The central locking unit (12) is triggered for central for locking the vehicle by means of transmitter (13).
  • the ECU (11) When the ECU (11) receives signal for locking the vehicle, it checks for the position of the steering angle from the steering wheel angle sensor (3). If the steering shaft (7) is in the steered position, in one embodiment the ECU (11) checks for the engine speed and vehicle speed from the engine speed sensor (10) and the vehicle speed sensor. When both vehicle speed and engine speed are zero, then the ECU (11) signals the solenoid controller (14) to retract the pin from the steering housing. Further, the ECU (11) signals the motor controller (5) to operate the motor (6) for rotating the steering shaft to center aligning of the wheels of the vehicle. In one embodiment the ECU (11) uses power from the battery for this operation.
  • FIGS. 2a-2c are exemplary embodiments of the present disclosure illustrating Ignition key switch having a solenoid with lock plunger in three different conditions.
  • the ignition lock with solenoid (2) consists of steering housing (2a) in which a key barrel unit (2 b) is housed.
  • the said outer body (2a) is mounted on steering shaft (7).
  • the outer body (2a) also houses a solenoid coil (2f) which is electrically energized.
  • a lock plunger pin (2d) is mounted co-axial to the solenoid coil (2f) in such a way that the lock plunger pin (2d) can reciprocate in and out of the solenoid coil (2f).
  • the ECU (11) will check for the steering angle through the steering angle sensor (3), and if the steering angle found to be zero then there will not be any further execution. If, the steering angle found to be greater than zero, then the ECU (11) will further check for steering torque by means of steering torque sensor (4). If the steering torque is not found to be zero, there will not be any further execution. Else, if the the steering torque is found to be zero, the signal goes to the ECU (11) which in turn send the signal further to the solenoid controller (14) to energize the solenoid coil (2f).
  • the system for centre alignment of wheels of a vehicle may be implemented in the vehicles which are without engine such as motor driven vehicles also termed as electric vehicles for centre alignment of the wheels when the vehicle in parked.
  • motor driven vehicles instead of engine speed sensor (10) a power supply detector may be implemented to check any supply of power from batteries to the motor. If there is no power supply detected, then it is equivalent zero rpm of the engine of the normal vehicle. Then, the system works in the same way as explained above for centre alignment of wheels.
  • the present disclosure provides a provide a system for central alignment of wheels of a vehicle, which will automatically align the vehicle wheels to zero inclination or also called as straight ahead position of vehicle during parking.
  • the present disclosure provides provide a system for central alignment of wheels of a vehicle, in which vehicle wheels will be aligned automatically without even driver's intervention.
  • the present disclosure provides provide a system for central alignment of wheels of a vehicle, which improves safety of the vehicle.
  • EPS Steering Electrical motor
  • ECU Electronic control unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)

Abstract

La présente invention concerne un système d'alignement central des roues d'un véhicule. Le système comprend une unité de commande conçue pour détecter le verrouillage du véhicule. Un capteur d'angle du volant est interfacé avec l'unité de commande pour déterminer si l'arbre de direction est en position dirigée. Un moteur couplé à une direction du véhicule est interfacé avec l'unité de commande pour faire tourner la direction en vue d'un alignement central des roues lorsque le verrouillage du véhicule et la position dirigée de l'arbre de direction sont détectés.
PCT/IB2014/060174 2013-03-27 2014-03-26 Système d'alignement central des roues d'un véhicule et son procédé WO2014155311A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1169/MUM/2013 2013-03-27
IN1169MU2013 IN2013MU01169A (fr) 2013-03-27 2014-03-26

Publications (2)

Publication Number Publication Date
WO2014155311A1 true WO2014155311A1 (fr) 2014-10-02
WO2014155311A4 WO2014155311A4 (fr) 2014-11-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/060174 WO2014155311A1 (fr) 2013-03-27 2014-03-26 Système d'alignement central des roues d'un véhicule et son procédé

Country Status (2)

Country Link
IN (1) IN2013MU01169A (fr)
WO (1) WO2014155311A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106005004A (zh) * 2016-05-13 2016-10-12 乐视控股（北京）有限公司 一种车辆控制方法、装置和车辆控制设备
FR3056533A1 (fr) * 2016-09-28 2018-03-30 Valeo Vision Dispositif d'aide a l'orientation des roues d'un vehicule
CN107901982A (zh) * 2017-11-07 2018-04-13 惠州华阳通用电子有限公司 一种方向盘回正提示方法及装置
CN112810695A (zh) * 2021-01-28 2021-05-18 徐州工业职业技术学院 一种汽车停车自动回正装置及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040024137A (ko) * 2002-09-13 2004-03-20 현대모비스 주식회사 차량의 조향 핸들 중립점 복귀 방법
US20110276225A1 (en) * 2010-05-07 2011-11-10 Ford Global Technologies, Llc Method and system for automatic wheel positioning
DE102012212207A1 (de) * 2011-07-12 2013-01-17 Hyundai Mobis Co., Ltd. Lenkradausrichtungsvorrichtung mit einer motorbetriebenen Servolenkung und entsprechendes Steuerverfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040024137A (ko) * 2002-09-13 2004-03-20 현대모비스 주식회사 차량의 조향 핸들 중립점 복귀 방법
US20110276225A1 (en) * 2010-05-07 2011-11-10 Ford Global Technologies, Llc Method and system for automatic wheel positioning
DE102012212207A1 (de) * 2011-07-12 2013-01-17 Hyundai Mobis Co., Ltd. Lenkradausrichtungsvorrichtung mit einer motorbetriebenen Servolenkung und entsprechendes Steuerverfahren
US8406958B2 (en) 2011-07-12 2013-03-26 Hyundai Mobis Co., Ltd. Wheel alignment apparatus using motor-driven power steering and control method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106005004A (zh) * 2016-05-13 2016-10-12 乐视控股（北京）有限公司 一种车辆控制方法、装置和车辆控制设备
FR3056533A1 (fr) * 2016-09-28 2018-03-30 Valeo Vision Dispositif d'aide a l'orientation des roues d'un vehicule
EP3300981A1 (fr) * 2016-09-28 2018-04-04 Valeo Vision Dispositif d'aide à l orientation des roues d'un véhicule
US10988175B2 (en) 2016-09-28 2021-04-27 Valeo Vision Device for assisting the orientation of the wheels of a vehicle
CN107901982A (zh) * 2017-11-07 2018-04-13 惠州华阳通用电子有限公司 一种方向盘回正提示方法及装置
CN112810695A (zh) * 2021-01-28 2021-05-18 徐州工业职业技术学院 一种汽车停车自动回正装置及方法

Also Published As

Publication number Publication date
WO2014155311A4 (fr) 2014-11-20
IN2013MU01169A (fr) 2015-04-24

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