Anti-lock brake system and sensor unit for the same
First Claim
1. A vehicle anti-lock brake system constituted so as to drive a brake driving actuator in accordance with detection results of a vehicle brake operating state and generate a target braking force, comprising:
- a rotating mechanism portion, said portion including a body of rotation configured to operably connect a wheel to a vehicle body side and to rotate the wheel;
a sensor unit, said sensor unit configured to;
detect a first acceleration and a second acceleration, the first acceleration being in a direction orthogonal to a rotating shaft in accordance with rotation, and the second acceleration being in the rotating direction,convert the detected first and second accelerations into first and second digital values, andtransmit the first and second digital values;
a monitor system configured to;
receive the transmitted first and second digital values,obtain the detected first and second accelerations;
obtain a speed of the vehicle from the obtained detected first acceleration; and
obtain a rotating speed per unit time of the wheel from the obtained detected second acceleration; and
a driving component configured to drive the brake driving actuator based at least partly on the obtained first and second accelerations,wherein said sensor unit is operably connected to said rotating mechanism portion.
1 Assignment
0 Petitions
Accused Products
Abstract
An anti-lock brake system and a sensor unit for the system, where acceleration occurring in a wheel is easily detected with high accuracy to perform braking control of a motor vehicle. Sensor units (100) having acceleration sensors that detect acceleration occurring, with the rotation of tires (300), in X, Y, and Z directions including the tire rotating direction are provided on rotating bodies of rotation mechanism portions including each tire (300). The sensor units (100) transmit digital values of the detected result as digital information by an electromagnetic wave. The digital information is received by a monitor device (200) provided on each tire house, and an acceleration value obtained by calculation is outputted to a brake control unit (600). The brake control unit (600) estimates a strain amount of each tire (300) based on the obtained acceleration value and previously memorized strain characteristic information, controls a pressure regulating valve (630) based on the estimated tire strain amount and a detected result of a rotating speed of each tire (300), and drives a brake driving actuator (640).
19 Citations
24 Claims
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1. A vehicle anti-lock brake system constituted so as to drive a brake driving actuator in accordance with detection results of a vehicle brake operating state and generate a target braking force, comprising:
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a rotating mechanism portion, said portion including a body of rotation configured to operably connect a wheel to a vehicle body side and to rotate the wheel; a sensor unit, said sensor unit configured to; detect a first acceleration and a second acceleration, the first acceleration being in a direction orthogonal to a rotating shaft in accordance with rotation, and the second acceleration being in the rotating direction, convert the detected first and second accelerations into first and second digital values, and transmit the first and second digital values; a monitor system configured to; receive the transmitted first and second digital values, obtain the detected first and second accelerations; obtain a speed of the vehicle from the obtained detected first acceleration; and obtain a rotating speed per unit time of the wheel from the obtained detected second acceleration; and a driving component configured to drive the brake driving actuator based at least partly on the obtained first and second accelerations, wherein said sensor unit is operably connected to said rotating mechanism portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A sensor unit operably connected to a rotating mechanism portion including:
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a body of rotation configured to; fix a wheel operably connected to a vehicle body side, and rotate the wheel, means for detecting a first acceleration generated in the direction orthogonal to a rotating shaft in accordance with rotation; means for detecting a second acceleration generated in a rotating direction; means for converting the detected first and second accelerations into first and second acceleration digital values, means for transmitting digital information including the first and second acceleration digital values; means for receiving electromagnetic waves of a first frequency; means for converting energy of the received electromagnetic waves into driving electric energy; means to be operated by the electric energy to transmit the digital information by using electromagnetic waves of a second frequency; means for obtaining a speed of the vehicle from the transmitted first acceleration digital value; and means for obtaining a rotating speed per unit time of a wheel of the vehicle from the transmitted second acceleration digital value. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification