Driving condition control method and system
First Claim
1. A driving condition control system installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said driving condition control system comprising:
- a sensing unit configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly;
a determining unit configured to compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result;
an acceleration detecting unit configured to detect an acceleration of the vehicle and to determine whether the vehicle is being accelerated or being braked according to the detected acceleration; and
an adjusting unit configured to, when the determining unit determines that the driving condition of the vehicle is unstable, adjust the power generated by the source of power in different manners according to the determination result representing that the vehicle is being accelerated or is being braked.
1 Assignment
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Accused Products
Abstract
In a driving condition control system, a sensing unit senses a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A determining unit compares the first and second physical quantities of the rotations of the first and second rotational axle assemblies and determines whether a driving condition of the vehicle is unstable according to the compared result. As a result, the unstable condition of the vehicle can be rapidly detected without detecting a yaw moment of the vehicle.
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Citations
27 Claims
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1. A driving condition control system installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said driving condition control system comprising:
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a sensing unit configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; a determining unit configured to compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result; an acceleration detecting unit configured to detect an acceleration of the vehicle and to determine whether the vehicle is being accelerated or being braked according to the detected acceleration; and an adjusting unit configured to, when the determining unit determines that the driving condition of the vehicle is unstable, adjust the power generated by the source of power in different manners according to the determination result representing that the vehicle is being accelerated or is being braked. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A driving condition control system installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said driving condition control system comprising:
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a sensing unit configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; a determining unit configured to compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result; a plurality of brake force generating units mechanically connected to the first and second wheels of the vehicle and configured to generate brake forces to apply the brake forces to the first and second wheels, respectively; a brake force control unit operatively connected to the plurality of brake force generating units and configured to, when said determining unit determines that the driving condition of the vehicle is unstable, to control the plurality of brake force generating units to generate the brake forces, to adjust the power; and an acceleration detecting unit configured to detect an acceleration of the vehicle and to determine whether the vehicle is being accelerated or being braked according to the detected acceleration, wherein, when the determining unit determines that the driving condition of the vehicle is unstable, said brake force control unit controls the brake forces in different manners according to the determination result representing that the vehicle is being accelerated or is being braked. - View Dependent Claims (9, 10)
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11. A driving condition control system installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said driving condition control system comprising:
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a sensing unit configured to sense a first rotational speed of the first rotational axle assembly and a second rotational speed of the second rotational axle assembly; a determining unit configured to compare the first and second rotational speeds of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result; a plurality of brake force generating units mechanically connected to the first and second wheels of the vehicle and configured to generate brake forces to apply the brake forces to the first and second wheels, respectively; a brake force control unit operatively connected to the plurality of brake force generating units and configured to control the generated brake forces; and an acceleration detecting unit configured to detect an acceleration of the vehicle and to determine whether the vehicle is being accelerated or being braked according to the detected acceleration, wherein, when the determining unit determines that the driving condition of the vehicle is unstable, said brake force control unit controls the brake force generating units to generate the brake forces, thereby adjusting the power by the brake forces, and wherein, when the determining unit determines that the driving condition of the vehicle is unstable, the acceleration detecting unit determines that the vehicle is being braked, and the sensing unit senses that the first rotational speed of the first rotational axle assembly is faster than the second rotational speed of the second rotational axle assembly, said brake force control unit controls the brake forces so that the brake force distributed to the first wheel is smaller than the brake force distributed to the second wheel. - View Dependent Claims (12)
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13. A driving condition control system installed in a vehicle, wherein said vehicle includes:
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a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, a second rotatable axle assembly to which a second wheel is attached, and an automatic transmission that is provided with a gear box and is mechanically connected between the source of power and the second rotatable axle assembly, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said automatic transmission changing gear ratios of the gear box to convert the power generated by the source to torque based on the gear ratios, thereby transferring torque to the second axle assembly, said driving condition control system comprising; a sensing unit configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; a determining unit configured to compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result; and an adjusting unit electrically connected to the automatic transmission and configured to control the automatic transmission to change the gear ratios to thereby adjust the torque.
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14. A driving condition control system installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said driving condition control system comprising:
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a sensing unit configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; a determining unit configured to compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies and to determine whether a driving condition of the vehicle is unstable according to the compared result; and a turning determining unit configured to determine whether the vehicle is turning, wherein said sensing unit starts to sense the first physical quantity of the rotation of the first rotatable axle assembly and the second physical quantity indicative of the rotation of the second rotatable axle assembly in response to the determination of the turning determining unit that the vehicle is turning.
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15. A program product having a computer-readable medium storing therein a program readable by an electronic control unit, said electronic control unit being installed in a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly as torque so that the second rotatable axle assembly is rotated, and a sensing unit that senses a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly, said program causing an electronic control unit to:
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receive the first physical quantity indicative of the rotation of the first rotatable axle assembly and the second physical quantity indicative of the rotation of the second rotatable axle assembly from the sensing unit; compare the first and second physical quantities of the rotations of the first and second rotational axle assemblies; determine whether a driving condition of the vehicle is unstable according to the compared result; detect an acceleration of the vehicle to determine whether the vehicle is being accelerated or being braked according to the detected acceleration; and when the determining step determines that the driving condition of the vehicle is unstable, adjust the power generated by the source of power in different manners according to the determination result representing that the vehicle is being accelerated or is being braked.
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16. A method of controlling a driving condition of a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said method comprising:
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sensing a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; comparing the first and second physical quantities of the rotations of the first and second rotational axle assemblies to determine whether a driving condition of the vehicle is unstable according to the compared result detecting an acceleration of the vehicle to determine whether the vehicle is being accelerated or being braked according to the detected acceleration; and when the comparing step determines that the driving condition of the vehicle is unstable, adjusting the power generated by the source of power in different manners according to the determination result representing that the vehicle is being accelerated or is being braked. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method of controlling a driving condition of a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said method comprising:
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sensing a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly; comparing the first and second physical quantities of the rotations of the first and second rotational axle assemblies to determine whether a driving condition of the vehicle is unstable according to the compared result; generating brake forces to apply the brake forces to the first and second wheels, respectively; when said comparing step determines that the driving condition of the vehicle is unstable, controlling the generated brake forces to adjust the power; detecting an acceleration of the vehicle to determine whether the vehicle is being accelerated or being braked according to the detected acceleration; and wherein, when the detecting step determines that the vehicle is being accelerated or being braked, said controlling step controls the brake forces in different manners according to the determination result representing that the vehicle is being accelerated or is being braked. - View Dependent Claims (24, 25)
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26. A method of controlling a driving condition of a vehicle, wherein said vehicle has a source of power for generating power, a first rotatable axle assembly to which a first wheel is attached, and a second rotatable axle assembly to which a second wheel is attached, said power being transferred to the second rotatable axle assembly so that the second rotatable axle assembly is rotated, said method comprising:
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sensing a first rotational speed of the first rotatable axle assembly and a second rotational speed of the second rotatable axle assembly; comparing the first and second rotational speeds of the first and second rotational axle assemblies to determine whether a driving condition of the vehicle is unstable according to the compared result; generating brake forces to apply the brake forces to the first and second wheels, respectively; controlling the generated brake forces; and detecting an acceleration of the vehicle to determine whether the vehicle is being accelerated or being braked according to the detected acceleration, wherein, when the comparing step determines that the driving condition of the vehicle is unstable, said controlling step uses the generated brake forces to adjust the torque and wherein, when the comparing step determines that the driving condition of the vehicle is unstable, the detecting step determines that the vehicle is being braked, and the sensing step senses that the first rotational speed of the first rotational axle assembly is faster than the second rotational speed of the second rotational axle assembly, said controlling step controls the brake forces so that the brake force distributed to the first wheel is smaller than the brake force distributed to the second wheel. - View Dependent Claims (27)
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Specification