Electronic brake system and control method thereof

Patent metadata

Field	Value
Publication number	US-10737668-B2
Application number	US-201816025833-A
Country	US
Kind code	B2
Filing date	Jul 2, 2018
Priority date	Jun 30, 2017
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

Disclosed are an electronic brake system and a control method thereof. The electronic brake system includes a first inner valve for transmitting hydraulic pressure to a first hydraulic circuit; a second inner valve for transmitting hydraulic pressure to a second hydraulic circuit; a first outer valve for discharging hydraulic pressure from the first hydraulic circuit; a second outer valve for discharging hydraulic pressure from the second hydraulic circuit; and an electronic control unit for generating a phase delay control signal for one inner valve when a current control signal is applied to the first inner valve and the second inner valve, and generating a phase delay control signal for one outer valve when a current control signal is applied to the first outer valve and the second outer valve.

First claim

What is claimed is:

1. An electronic brake system comprising:
a first inner valve for transmitting hydraulic pressure to a first hydraulic circuit;
a second inner valve for transmitting hydraulic pressure to a second hydraulic circuit;
a first outer valve for discharging hydraulic pressure from the first hydraulic circuit;
a second outer valve for discharging hydraulic pressure from the second hydraulic circuit; and
an electronic control unit for generating a phase delay control signal for one inner valve when a current control signal is applied to the first inner valve and the second inner valve, and generating a phase delay control signal for one outer valve when a current control signal is applied to the first outer valve and the second outer valve.

2. The electronic brake system according to claim 1 ,
wherein the current control signal includes a PWM (Pulse Width Modulation) control signal.

3. The electronic brake system according to claim 1 ,
wherein when the phase delay control signal is generated for the one inner valve, the electronic control unit calculates the phase delay control signal so that the superimposed currents of the current control signal applied to the first inner valve and the current control signal applied to the second inner valve are canceled.

4. The electronic brake system according to claim 3 ,
wherein the electronic control unit generates a 180-degree phase delay control signal for the one inner valve.

5. The electronic brake system according to claim 1 ,
wherein when the phase delay control signal is generated for the one outer valve, the electronic control unit calculates the phase delay control signal so that the superimposed currents of the current control signal applied to the first outer valve and the current control signal applied to the second outer valve are canceled.

6. The electronic brake system according to claim 5 ,
wherein the electronic control unit generates a 180-degree phase delay control signal for the one outer valve.

7. A method of controlling an electronic brake system comprising: a first inner valve for transmitting hydraulic pressure to a first hydraulic circuit; a second inner valve for transmitting hydraulic pressure to a second hydraulic circuit; a first outer valve for discharging hydraulic pressure from the first hydraulic circuit; and a second outer valve for discharging hydraulic pressure from the second hydraulic circuit, which comprises:
generating a phase delay control signal for one inner valve when a current control signal is applied to the first inner valve and the second inner valve; and
generating a phase delay control signal for one outer valve when a current control signal is applied to the first outer valve and the second outer valve.

8. The method of controlling an electronic brake system according to claim 7 ,
wherein the current control signal includes a PWM (Pulse Width Modulation) control signal.

9. The method of controlling an electronic brake system according to claim 7 ,
wherein generating a phase delay control signal for one inner valve when a current control signal is applied to the first inner valve and the second inner valve generates a 180-degree phase delay control signal for the one inner valve.

10. The method of controlling an electronic brake system according to claim 7 ,
wherein generating a phase delay control signal for one outer valve when a current control signal is applied to the first outer valve and the second outer valve generates a 180-degree phase delay control signal for the one outer valve.

Assignees

• Mando Corp

Inventors

• Yun Sangwon

Classifications

• B60Y2400/81

  Braking systems · CPC title

• B60T13/683 Primary

  in pneumatic systems or parts thereof (in vacuum systems B60T13/72) · CPC title

• B60T8/40

  comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system · CPC title

• B60T1/10 Primary

  by utilising wheel movement for accumulating energy, e.g. driving air compressors · CPC title

• B60Y2306/09

  Reducing noise · CPC title