EPB and WSS connecting system
A two-wire connecting system for linking an Electronic Parking Brake and Wheel Speed Sensor to a vehicle control module utilizing a ternary analogous signal. One or more diodes are implemented in the connecting system to selectively power the Electronic Parking Brake and Wheel Speed Sensor. By halving the number of wires, the connecting system is lighter than traditional 4-wire connecting systems that link an Electronic Parking Brake and Wheel Speed Sensor with a control module.
1. A connecting system for connecting an electric parking brake mechanism and a wheel speed sensor of a vehicle with a controller, comprising:
a control module configured to control the electric parking brake mechanism and the wheel speed sensor;
a cable having a first end and a second end, comprising: a ground wire and a power wire;
a first diode associated with the electric parking brake mechanism; and
a second diode associated with the wheel speed sensor, wherein the first and second diodes cooperate to allow power to only one of the electric parking brake mechanism and the wheel speed sensor at a time.
2. The connecting system of claim 1 ,
wherein a ground terminal of the ground wire at the first end of the cable is connected to a ground terminal of the control module; and
wherein a power terminal of the power wire at the first end of the cable is connected to a power terminal of a control module.
3. The connecting system of claim 1 ,
wherein a ground terminal of the ground wire at the second end of the cable is connected to a ground terminal of the electric parking brake mechanism; and
wherein the ground terminal of the ground wire at the second end of the cable is connected to a ground terminal of the wheel speed sensor.
4. The connecting system of claim 1 ,
wherein a power terminal of the power wire at the second end of the cable is connected to a negative terminal of the first diode associated with the electric parking brake mechanism; and
wherein the power terminal of the power wire at the second end of the cable is connected to a positive terminal of the second diode associated with the wheel speed sensor.
5. The connecting system of claim 1 ,
wherein a positive terminal of the first diode associated with the electric parking brake mechanism is connected to a power terminal of the electric parking brake mechanism; and
wherein a negative terminal of the second diode associated with the wheel speed sensor is connected to a power terminal of the wheel speed sensor.
6. The connecting system of claim 1 ,
wherein the control module is configured to selectively supply a positive and negative voltage to the power wire of the cable; and
wherein the first diode is configured to block a positive voltage on the power wire from reaching the electric parking brake mechanism; and
wherein the second diode is configured to block a negative voltage on the power wire from reaching the wheel speed sensor.
7. The connecting system of claim 1 , wherein absolute voltage on a power terminal of the control module does not exceed 48 V.
8. The connecting system of claim 1 , wherein the first diode is integrated into the electric parking brake mechanism, and wherein the second diode is integrated into the wheel speed sensor.
9. The connecting system of claim 1 , wherein the control module comprises an integrated power supply, the integrated power supply configured to supply both a positive voltage level and a negative voltage level.
10. The connecting system of claim 1 , wherein the control module comprises an integrated power supply, the integrated power supply configured to supply a higher voltage than an on-board power supply of the vehicle.
11. The connecting system of claim 1 , wherein the first diode and the second diode are arranged in parallel with the electric parking brake mechanism and the wheel speed sensor on the same wheel.
12. A connecting system for connecting an electric parking brake mechanism and a wheel speed sensor of a vehicle with a controller, comprising:
a control module configured to control the electric parking brake mechanism and the wheel speed sensor;
a cable having a first end and a second end, comprising: a ground wire and a power wire for delivering power from the control module to at least one of the electric parking brake mechanism and the wheel speed sensor; and
a diode connected to the power wire and associated with the electric parking brake mechanism such that the polarity of the power provided to the power wire determines whether power is delivered to both the electric parking brake mechanism and the wheel speed sensor or only to the wheel speed sensor.
13. The connecting system of claim 12 ,
wherein a ground terminal of the ground wire at the first end of the cable is connected to a ground terminal of the control module; and
wherein a power terminal of the power wire at the first end of the cable is connected to a power terminal of a control module.
14. The connecting system of claim 12 ,
wherein a ground terminal of the ground wire at the second end of the cable is connected to a ground terminal of the electric parking brake mechanism; and
wherein the ground terminal of the ground wire at the second end of the cable is connected to a ground terminal of the wheel speed sensor.
15. The connecting system of claim 12 ,
wherein a power terminal of the power wire at the second end of the cable is connected to a negative terminal of the diode associated with the electric parking brake mechanism.
16. The connecting system of claim 12 ,
wherein a positive terminal of the diode associated with the electric parking brake mechanism is connected to a power terminal of the electric parking brake mechanism.
17. The connecting system of claim 12 ,
wherein the a control module is configured to selectively supply a positive and negative voltage to the power wire of the cable; and
wherein the diode is configured to block a positive voltage on the power wire from reaching the electric parking brake mechanism.
18. The connecting system of claim 12 , wherein the diode is integrated into the electric parking brake mechanism.
19. The connecting system of claim 12 , wherein the control module comprises an integrated power supply, the integrated power supply configured to supply both a positive voltage level and a negative voltage level.
20. The connecting system of claim 12 , wherein the control module comprises an integrated power supply, the integrated power supply configured to supply a higher voltage than an on-board power supply of the vehicle.
21. The connecting system of claim 12 , wherein absolute voltage on a power terminal of the control module does not exceed 48 V.