Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
  • B60T8/17—Using electrical or electronic regulation means to control braking
  • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
  • B60T8/1725—Using tyre sensors, e.g. Sidewall Torsion sensors [SWT]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
  • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
  • B60G17/0195—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the regulation being combined with other vehicle control systems
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
  • B60G2400/50—Pressure
  • B60G2400/52—Pressure in tyre
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
  • B60G2800/90—System Controller type
  • B60G2800/984—Tyre Pressure Monitoring Systems
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
  • B60W2530/20—Tyre data
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2710/00—Output or target parameters relating to a particular sub-units
  • B60W2710/18—Braking system
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2710/00—Output or target parameters relating to a particular sub-units
  • B60W2710/18—Braking system
  • B60W2710/182—Brake pressure, e.g. of fluid or between pad and disc

Definitions

• the present invention relates to a motor vehicle comprising a system for controlling its road behavior and a system for diagnosing the condition of its tires.
• Today motor vehicles are equipped with driver assistance systems controlling their driving behavior, such as an anti-lock system for wheels, or ABS system, a trajectory control system, or ESP system, a speed limitation / regulation system, anti-collision system, trajectory tracking system, etc.
• driver assistance systems controlling their driving behavior, such as an anti-lock system for wheels, or ABS system, a trajectory control system, or ESP system, a speed limitation / regulation system, anti-collision system, trajectory tracking system, etc.
• These vehicles are also equipped with diagnostic systems for the condition of their tires associated with on-board alarms to warn the driver of the condition of the tires.
• control laws of the road behavior of the vehicle executed by the driver assistance system are based on a single condition of the tires of the vehicle, namely a satisfactory state thereof.
• the object of the invention is to solve the aforementioned problem.
• the subject of the invention is a motor vehicle comprising a system for controlling its road behavior and a system for diagnosing the condition of its tires, characterized in that said control system is adapted to control the road behavior of the vehicle. vehicle according to the diagnosed condition of the tires.
• the motor vehicle according to the invention may comprise one or more of the following characteristics:
• the diagnostic system is able to diagnose the state of inflation of the tires, and in that the control system is able to control the road behavior of the vehicle in a predetermined mode of safety when the inflation state diagnosed is not satisfactory; the control system is capable of limiting the speed of the vehicle when the diagnosed inflation state is not satisfactory;
• the control system is able to reduce the braking applied to a wheel when the tire thereof is diagnosed as underinflated
• the control system is able to increase the braking applied to the wheels of the vehicle whose tires are diagnosed as having satisfactory inflation conditions to compensate for the reduction in braking applied to the wheel having a tire diagnosed as underinflated.
• FIG. 1 is a schematic view of a motor vehicle according to the invention.
• FIG. 2 is a schematic view of a control unit forming part of the constitution of the vehicle of FIG. 1.
• FIG. 1 there is schematically illustrated a motor vehicle 10 according to the invention.
• the vehicle 10 is equipped with a motor 12 for driving, for example, two front wheels 14a, 14b, a steering system 16 for steering the front wheels 14a, 14b which are also steered, and a steering system.
• brake comprising a brake pad caliper 18a, 18b, 18c, 18d on each of the vehicle wheels 14a, 14b, 14c, 14d.
• Means for acquiring the instructions issued by the driver for the engine 12 and the steering systems 16 and braking 18a, 18b, 18c, 18d are provided and include in particular:
• an angle sensor 28 of the steering wheel 30 of the vehicle for acquiring the steering angle demand of the steering wheels 14a, 14b; and a sensor 32 of position of the speed lever 34 of the vehicle in the case of a manual gearbox, or a gearbox selection sensor of the box in the case of an automatic gearbox, for the acquisition gear ratio engaged gearbox of the vehicle.
• Means for acquiring the operating parameters of the vehicle are also provided and include in particular:
• a speed sensor 36 for acquiring the rotational speed of the engine 12
• means 38a, 38b, 38c, 38d for acquiring operating parameters of each of the wheels 14a, 14b, 14c, 14d of the vehicle comprising an angular velocity sensor for acquiring its angular velocity, and either an accelerometer single-axis or tri-axis for the acquisition of its vertical acceleration to estimate the inflation pressure of its tire, ie a pressure sensor for measuring the inflation pressure of its tire.
• the motor 12 and the steering systems 16 and braking 18a, 18b, 18c, 18d are electrically controlled and receive from a control unit 40 for controlling the driving behavior of the vehicle 10.
• This unit 40 is connected to the different acquisition means 20, 24, 28, 32, 36, 38a, 38b, 38c, 38d and determines these signals as a function of the instructions issued by the driver and the operating parameters of the acquired vehicle.
• the unit 40 also determines the state of the tires of the wheels 14a, 14b, 14c, 14d as a function of the measurements it receives. It is for example implemented by a control unit of the operation of the vehicle, moreover in charge of other functionalities thereof, such as the determination of fuel injection instructions in the engine cylinders or flow rate. air admitted into these for example.
• the unit 40 may also be implemented by a dedicated information processing unit.
• the vehicle 10 is also equipped with means 42 for delivering visual and / or acoustic information relating to the road behavior of the vehicle.
• vehicle and the condition of its tires such as a display screen or a loudspeaker, for example.
• FIG. 2 is a schematic view of the control unit 40.
• the unit 40 comprises a module 50 for diagnosing the state of each of the tires of the vehicle, and in particular its state of inflation and the presence of hernia and unbalance.
• the module 50 estimates this state in a manner known per se as a function of the acquired pressure Pi of inflation thereof, the vertical acceleration fi acquired wheel and the speed of rotation A 1 acquired from the wheel on which he climbed.
• the module 50 estimates in particular the type and the level of failure of the tire and delivers them to the means 42 for issuing information to warn the driver of the vehicle.
• the module 50 diagnoses that the tire is underinflated if its inflation pressure is lower than a first predetermined threshold value and determines that this underinflation is critical if the inflation pressure is less than a second value of predetermined threshold.
• the diagnostic module 40 is also connected to a module 52 for controlling the road behavior of the vehicle.
• the module 52 comprises means 54 for estimating rolling parameters of the vehicle, for example the speeds Vlac, Vlat, Vlong of yaw, longitudinal and longitudinal of the vehicle depending on the different acquired information ⁇ P f, ⁇ pa , ⁇ v , R b and N as is known per se.
• the module 52 also comprises means 56 connected to the diagnostic module 50 and the estimation means 52.
• the means 56 implement a control law of the motor 12 and steering systems 16 and braking 18a, 18b, 18c, 18d, such as an ABS control, ESP, and limitation / regulation of the speed of the vehicle, depending on the information acquired and the diagnosed condition of the tires.
• the means 52 select a control law depending on the condition of the tires diagnosed by the unit 40. For example, if the inflation of the tires is diagnosed as satisfactory, the means 52 then implement a control law Classic ABS. If a tire is diagnosed as underweight inflated, the means 52 then select an ABS control law which has the effect of reducing the amount of braking applied to the wheel associated with this tire and which has the effect of increasing the amount of braking applied to the other wheels whose tires are diagnosed as satisfactory to compensate for this reduction in braking. The vehicle is thus controlled by the means 52 in a security mode.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Automation & Control Theory (AREA)
• Regulating Braking Force (AREA)
• Control Of Driving Devices And Active Controlling Of Vehicle (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36561056

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (9)

• 2005
  • 2005-09-16 FR FR0509503A patent/FR2890927B1/fr not_active Expired - Fee Related
• 2006
  • 2006-09-11 WO PCT/FR2006/050864 patent/WO2007031674A1/fr active Application Filing
  • 2006-09-11 US US12/067,171 patent/US20080312784A1/en not_active Abandoned
  • 2006-09-11 EP EP06808302A patent/EP1924452A1/de not_active Withdrawn

Non-Patent Citations (1)

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