Brake control system
View Patent ↗Disclosed is a brake control system including a plurality of control apparatuses using a brake operation amount detection apparatus and one brake operation amount detection apparatus. The brake control system includes: a master-cylinder pressure control apparatus that controls a master-cylinder pressure based on a brake operation amount; a wheel-cylinder pressure control apparatus that controls a wheel-cylinder pressure of each wheel; and a master-cylinder pressure detection apparatus that detects a signal for calculating the master-cylinder pressure, the master-cylinder pressure control apparatus controls the master-cylinder pressure based on a detection result detected by the master-cylinder pressure detection apparatus, and the wheel-cylinder pressure control apparatus controls the wheel-cylinder pressure based on the detection result detected by the master-cylinder pressure detection apparatus.
1. A brake control system, comprising:
a master-cylinder pressure control apparatus that controls a master-cylinder pressure based on a brake operation amount;
a wheel-cylinder pressure control apparatus that controls a wheel-cylinder pressure of each wheel; and
a master-cylinder pressure detection apparatus that detects a signal for calculating the master-cylinder pressure,
wherein the master-cylinder pressure control apparatus controls the master-cylinder pressure based on a detection result detected by the master-cylinder pressure detection apparatus, and
the wheel-cylinder pressure control apparatus controls the wheel-cylinder pressure based on the detection result detected by the master-cylinder pressure detection apparatus,
wherein the master-cylinder pressure detection apparatus is electrically connected to the wheel-cylinder pressure control apparatus,
wherein a power supply voltage is supplied from the wheel-cylinder pressure control apparatus to the master-cylinder pressure detection apparatus, and
wherein the wheel-cylinder pressure control apparatus controls a wheel-cylinder pressure control mechanism that outputs a wheel-cylinder pressure to each wheel, and the master-cylinder pressure detection apparatus is provided in the wheel-cylinder pressure control mechanism.
2. The brake control system according to claim 1 , wherein the wheel-cylinder pressure control apparatus is electrically connected to the master-cylinder pressure detection apparatus, and controls a wheel-cylinder pressure based on a detection result detected by the master-cylinder pressure detection apparatus when the master-cylinder pressure control apparatus fails.
3. The brake control system according to claim 1 , wherein the master-cylinder pressure control apparatus and the wheel-cylinder pressure control apparatus are electrically connected, and
the master-cylinder pressure control apparatus obtains the master-cylinder pressure calculated by the wheel-cylinder pressure control apparatus.
4. The brake control system according to claim 3 , wherein the wheel-cylinder pressure control apparatus and the master-cylinder pressure control apparatus are electrically connected by communication means that transmits and receives a master-cylinder pressure,
the wheel-cylinder pressure control apparatus calculates a master-cylinder pressure based on a detection result of the master-cylinder pressure detection apparatus, and
the master-cylinder pressure control apparatus obtains the master-cylinder pressure calculated by the wheel-cylinder pressure control apparatus via the communication means.
5. The brake control system according to claim 4 , wherein the wheel-cylinder pressure control apparatus comprises:
a first processing apparatus that calculates a master-cylinder pressure; and
a first communication section that connects the communication means and the first processing apparatus, and
the master-cylinder pressure control apparatus comprises:
a second processing apparatus that obtains the master-cylinder pressure; and
a second communication section that connects the communication means and the second processing apparatus.
6. The brake control system according to claim 4 , wherein the communication means is a CAN.
7. The brake control system according to claim 6 , wherein the wheel-cylinder pressure control apparatus comprises:
a first processing apparatus that calculates a master-cylinder pressure;
a sensor power supply circuit that supplies a power supply voltage to the master-cylinder pressure detection apparatus;
a power supply monitor circuit that outputs a power supply voltage supplied from the sensor power supply circuit to the first processing apparatus;
a signal monitor circuit that outputs the detection result input from the master-cylinder pressure detection apparatus to the first processing apparatus; and
a first CAN communication section that connects the CAN and the first processing apparatus, and
the wheel-cylinder pressure control apparatus is electrically connected to a ground line of the master-cylinder pressure detection apparatus.
8. The brake control system according to claim 7 , wherein the master-cylinder pressure control apparatus comprises:
a second processing apparatus that obtains the master-cylinder pressure; and
a second CAN communication section that connects the CAN and the second processing apparatus, and
the second processing apparatus obtains the master-cylinder pressure from the wheel-cylinder pressure control apparatus via the CAN.
9. The brake control system according to claim 3 , wherein the master-cylinder pressure control apparatus obtains a voltage signal from the wheel-cylinder pressure control apparatus.
10. The brake control system according to claim 9 , wherein the master-cylinder pressure control apparatus calculates a master-cylinder pressure based on a power supply voltage, the detection result, and a ground voltage of the master-cylinder pressure detection apparatus.
11. The brake control system according to claim 10 , wherein the wheel-cylinder pressure control apparatus comprises:
a first processing apparatus that calculates a master-cylinder pressure;
a sensor power supply circuit that supplies a power supply voltage to the master-cylinder pressure detection apparatus;
a power supply monitor circuit that outputs a power supply voltage supplied from the sensor power supply circuit to the first processing apparatus; and
a signal monitor circuit that outputs the signal voltage that is the detection result input from the master-cylinder pressure detection apparatus to the first processing apparatus, and
wherein the wheel-cylinder pressure control apparatus is electrically connected to a ground line of the master-cylinder pressure detection apparatus.
12. The brake control system according to claim 11 , wherein the master-cylinder pressure control apparatus comprises:
a second processing apparatus that calculates a master-cylinder pressure;
a power supply monitor circuit that outputs a power supply voltage supplied from the sensor power supply circuit of the wheel-cylinder pressure control apparatus to the master-cylinder pressure detection apparatus to the second processing apparatus;
a signal monitor circuit that outputs the signal voltage that is the detection result input from the master-cylinder pressure detection apparatus to the second processing apparatus; and
a GND monitor circuit that is electrically connected to the ground line of the master-cylinder pressure detection apparatus, and outputs a ground voltage for correcting a potential difference between a ground point of the wheel-cylinder pressure control apparatus and a ground point of the master-cylinder pressure control apparatus to the second processing apparatus.
13. The brake control system according to claim 11 , wherein the master-cylinder pressure control apparatus comprises:
a second processing apparatus that calculates a master-cylinder pressure;
a power supply monitor circuit that outputs a power supply voltage supplied from the sensor power supply circuit of the wheel-cylinder pressure control apparatus to the master-cylinder pressure detection apparatus to the second processing apparatus;
a signal monitor circuit that outputs the signal voltage that is the detection result input from the master-cylinder pressure detection apparatus to the second processing apparatus;
a first subtraction circuit that outputs a difference between an output voltage of the power supply monitor circuit and a voltage of the ground line of the master-cylinder pressure detection apparatus to the second processing apparatus; and
a second subtraction circuit that outputs a difference between an output voltage of the signal monitor circuit and a voltage of the ground line of the master-cylinder pressure detection apparatus to the second processing apparatus.
14. The brake control system according to claim 9 , wherein the master-cylinder pressure control apparatus calculates a master-cylinder pressure based on a potential difference between a power supply voltage and a ground voltage of the master-cylinder pressure detection apparatus, and a potential difference between a signal voltage that is the detection result and the ground voltage.
15. The brake control system according to claim 1 , wherein the master-cylinder pressure detection apparatus is electrically connected to the master-cylinder pressure control apparatus.
16. The brake control system according to claim 1 , wherein the master-cylinder pressure detection apparatus outputs a signal voltage from the supplied power supply voltage as a detection result in accordance with a hydraulic pressure.
17. A brake control system, comprising:
a master-cylinder pressure control apparatus that controls a master-cylinder pressure based on a brake operation amount;
a wheel-cylinder pressure control apparatus that controls a wheel-cylinder pressure of each wheel; and
one master-cylinder pressure detection apparatus that detects a signal for calculating the master-cylinder pressure,
wherein the master-cylinder pressure control apparatus controls the master-cylinder pressure based on a output result that is output by the one master-cylinder pressure detection apparatus, and
the wheel-cylinder pressure control apparatus controls the wheel-cylinder pressure based on the output result that is output by the one master-cylinder pressure detection apparatus,
wherein the master-cylinder pressure detection apparatus is electrically connected to the wheel-cylinder pressure control apparatus,
wherein a power supply voltage is supplied from the wheel-cylinder pressure control apparatus to the master-cylinder pressure detection apparatus, and
wherein the master-cylinder pressure detection apparatus is provided in a master-cylinder.
18. The brake control system according to claim 17 , wherein the master-cylinder pressure control apparatus and the wheel-cylinder pressure control apparatus are electrically connected, and
the master-cylinder pressure control apparatus obtains the master-cylinder pressure calculated by the wheel-cylinder pressure control apparatus.
19. The brake control system according to claim 18 , wherein the wheel-cylinder pressure control apparatus controls a wheel-cylinder pressure according to an operation amount of a brake pedal, based on the master-cylinder pressure calculated by the wheel-cylinder pressure control apparatus when the master-cylinder pressure control apparatus fails.
20. The brake control system according to claim 19 , wherein the wheel-cylinder pressure control apparatus and the master-cylinder pressure control apparatus are electrically connected by communication means that transmits and receives a master-cylinder pressure,
the wheel-cylinder pressure control apparatus calculates a master-cylinder pressure based on a detection result of the master-cylinder pressure detection apparatus, and
the master-cylinder pressure control apparatus obtains the master-cylinder pressure calculated by the wheel-cylinder pressure control apparatus via the communication means.
21. The brake control system according to claim 20 , wherein the wheel-cylinder pressure control apparatus comprises:
a first processing apparatus that calculates a master-cylinder pressure; and
a first communication section that connects the communication means and the first processing apparatus, and
the master-cylinder pressure control apparatus comprises:
a second processing apparatus that obtains the master-cylinder pressure; and
a second communication section that connects the communication means and the second processing apparatus.
22. The brake control system according to claim 20 , wherein the communication means is a CAN.
23. The brake control system according to claim 22 , wherein the wheel-cylinder pressure control apparatus comprises:
a first processing apparatus that calculates a master-cylinder pressure;
a sensor power supply circuit that supplies a power supply voltage to the master-cylinder pressure detection apparatus;
a power supply monitor circuit that outputs a power supply voltage supplied from the sensor power supply circuit to the first processing apparatus;
a signal monitor circuit that outputs the detection result input from the master-cylinder pressure detection apparatus to the first processing apparatus; and
a first CAN communication section that connects the CAN and the first processing apparatus, and
the wheel-cylinder pressure control apparatus is electrically connected to a ground line of the master-cylinder pressure detection apparatus.
24. The brake control system according to claim 23 , wherein the master-cylinder pressure control apparatus comprises:
a second processing apparatus that obtains the master-cylinder pressure; and
a second CAN communication section that connects the CAN and the second processing apparatus, and
the second processing apparatus obtains the master-cylinder pressure from the wheel-cylinder pressure control apparatus via the CAN.