Fluid-pressure and analogous brake systems – Speed-controlled – Specific mu determination
Reexamination Certificate
2007-07-10
2007-07-10
Kramer, Devon (Department: 3683)
Fluid-pressure and analogous brake systems
Speed-controlled
Specific mu determination
C303S160000, C303S175000, C303S178000, C303S182000, C303S183000
Reexamination Certificate
active
10892294
ABSTRACT:
A brake torque control device obtains inertia torque Tine based upon an equation of motion (Tine=Tw−Ft·Rt) about the rotation of a tire based upon a wheel torque Tw according to a brake torque exerted on the tire, road friction force Ft and a radius Rt of the tire. When the inertia torque Tine exceeds a predetermined reference value, road friction force Ft at this time is set as estimated maximum road friction force Fmax. The instructed brake torque is calculated under the condition that the value that is obtained by adding the predetermined value corresponding to the inertia torque Tine to the torque Fmax·Rt based upon this estimated maximum road friction force Fmax is set as an upper limit value of the instructed brake torque. This allows to clearly set, as one value, the target value of the instructed brake torque upon an ABS control, thereby being capable of more accurately executing the pressure-increasing control and pressure-reducing control of the brake fluid pressure.
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Miyazaki et al., “ABS Control by Measuring of 4 Axis Directional Forces between the Road Surface and Tire—Third Report: Control Algorithm by One-segment Sensing Method Using New Parameter M-”, Society of Automotive Engineers of Japan, Inc., Japan, Oct. 1998, pp. 5-8 (Abstract provided), and English language translation is also enclosed.
Nakano Keita
Niino Hiroaki
Suzuki Motoshi
Yoshino Masato
Advics Co., Ltd.
Buchanan & Ingersoll & Rooney PC
Kramer Devon
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