초록 ▼

A brake apparatus for use in a motor vehicle having at least one front wheel and at least one rear wheel. The brake apparatus includes a diagonal braking pressure supply system provided between a master cylinder and wheel braking cylinders for applying braking forces to the front and rear wheels. A

A brake apparatus for use in a motor vehicle having at least one front wheel and at least one rear wheel. The brake apparatus includes a diagonal braking pressure supply system provided between a master cylinder and wheel braking cylinders for applying braking forces to the front and rear wheels. A proportioning valve is provided in the braking pressure supply system for controlling the braking pressure to be applied to the rear-wheel braking cylinder in accordance with a control signal so as to vary the ratio of the braking pressure to the rear-wheel braking cylinder with respect to the braking pressure to be applied to the front-wheel braking cylinder. Also included is an electronic control unit which produces the control signal to the proportioning valve. The electronic control unit obtains a command value on the basis of a parameter corresponding to the difference between the lock states of the front and rear wheels which are in turn obtained on the basis of signals indicative of speeds of the front and rear wheels. The control signal is determined in accordance with the command value and supplied to the proportioning valve.

대표청구항 ▼

A brake apparatus for use in a motor vehicle having at least one font-side wheel and at least one rear-side wheel, comprising: a braking pressure supply system including a master cylinder of said vehicle for generating a braking pressure in response to operation of a braking pedal of said vehicle, f

A brake apparatus for use in a motor vehicle having at least one font-side wheel and at least one rear-side wheel, comprising: a braking pressure supply system including a master cylinder of said vehicle for generating a braking pressure in response to operation of a braking pedal of said vehicle, front-side and rear-side wheel braking cylinders for applying braking forces to said front -side wheel and rear-side wheel, and first and second supply passage for conducting braking pressure generated by said master cylinder to said front-side and rear-side wheel braking cylinders, respectively. braking pressure adjusting means, provided in said braking pressure supply system, for adjusting the braking pressure to be applied to said front-side and rear-side wheel braking cylinders in accordance with a drive signal; first sensor means for sensing a speed of said front-side wheel and generating a first detection signal indicative of the sensed speed of said front-side wheel; second sensor means for sensing a speed of said rear-side wheel and generating a second detection signal indicative of the sensed speed of said front-side wheel; proportioning valve means, provided in said second supply passage of said braking pressure supply system, for controlling the braking pressure to be applied to said rear-side wheel braking cylinder in accordance with a control signal so as to vary the ratio of the braking pressure to said rear-side wheel braking cylinder with respect to the braking pressure to be applied to said front-side wheel braking cylinder; and electronic control means, responsive to said first and second detection signals for producing said control signal and said drive signal, said electronic control means including; first lock-tendency calculation means for calculating a lock tendency of said front-side wheel on the basis of said first detection signal; second lock-tendency calculation means for calculating a lock tendency of said rear-side wheel on the basis of said second detection signal; parameter calculation means coupled to said first and second lock-tendency calculation means for determining a difference between said front-side wheel and rear-side wheel lock tendencies calculated in said first and second lock-tendency calculation means and generating a parameter indicative thereof; command-value calculation means for calculating a command value by integrating the parameter; first output means for outputting to said braking pressure adjusting means said drive signal determined in accordance with the lock tendencies calculated by said first and second lock-tendency calculation means; and second output means for outputting to said proportioning valve means said control signal determined in accordance with the command value.