BRAKE-FORCE CONTROL SYSTEM FOR VEHICLES, ESPECIALLY MOTOR VEHICLES

• US 3,791,702 A
• Filed: 08/04/1971
• Issued: 02/12/1974
• Est. Priority Date: 08/04/1970
• Status: Expired due to Term

• Current Assignee: Hans-Jorg Florus, Hellmut Krohn, Horst Grossner, Manfred H. Burckhardt
• Original Assignee: Hans-Jorg Florus, Hellmut Krohn, Horst Grossner, Manfred H. Burckhardt
• Inventors: Burckhardt, Manfred H., Krohn, Hellmut, Grossner, Horst, Florus, Hans-Jorg
• Primary Examiner(s): Reger, Duane A.
• Assistant Examiner(s): Kunin, Stephen G.
• Application Number:
  US05/168,909
• Time in Patent Office: 923 Days
• Field of Search: 188/181R,181A 303/20,21 340/52R
• US Class Current: 303/199
• CPC Class Codes: B60T 8/17613 based on analogue circuits or digital circuits comprised of discrete electronic elements
• CPC Class Codes: B60T 8/58 responsive to speed and another condition or to plural speed conditions

Abstract

A brake force control system for vehicles, especially for motor vehicles in which the brake medium pressure acting on the brakes is controlled as a function of the rotary condition of the wheel by magnetically controlled inlet and outlet valves in the manner of a three point control; during each control of an inlet valve a signal causing a short defined opening of the outlet valve is simultaneously fed to the associated outlet valve by way of a coupling apparatus, preferably consisting of a circuit including a resistor and reactive impedance whose values may be varied as a function of certain characteristics of the brake force control system.

Claims

1. A brake force control system for vehicles with a brake medium for the brakes thereof, especially motor vehicles, in which a brake medium pressure acting on a brake is controlled by signals in dependence on the rotary condition of a wheel by magnetically controlled inlet and outlet valve means, characterized by opening means for causing a defined opening of short duration of the outlet valve means, the opening means including coupling means for supplying during each control of an inlet valve means a signal to the associated outlet valve means to cause the defined opening.

2. A brake force control system according to claim 1, characterized in that the coupling means determining the duration of the signal for the outlet valve means is adjustable by at least one characteristic magnitude of the brake force control system.

3. A brake force control system according to claim 2, characterized in that the coupling means is adjustable as a function of several characteristic magnitudes of the brake force control system.

4. A brake force control system according to claim 3, characterized in that one of said several characteristic magnitudes is the vehicle velocity.

5. A brake force control system according to claim 2, characterized in that the coupling means is operable in such a manner that with a greater rotary deceleration of the respective wheel the duration of the signal is larger than with a smaller rotary deceleration.

6. A brake force control system according to claim 2, characterized in that the coupling means is opeRable to increase the duration of the signal fed to the associated outlet valve means with an increasing vehicle velocity.

7. A brake force control system according to claim 6, characterized in that the coupling means is operable in such a manner that with a greater rotary deceleration of the respective wheel the duration of the signal is larger than with a smaller rotary deceleration.

8. A brake force control system according to claim 7, characterized in that the coupling means is operable in such a manner that the duration of the signal changes with changes in temperature.

9. A brake force control system according to claim 8, wherein the temperature is the ambient temperature.

10. A brake force control system according to claim 9, characterized in that said temperature is the temperature of the brake medium.

11. A brake force control system according to claim 10, characterized in that the temperature is the temperature of the brake disc.

12. A brake force control system according to claim 11, characterized in that a line controlling the inlet valve means is connected with the coupling means including capacitor means and resistor means.

13. A brake force control system accordint to claim 12, characterized in that at least one of said capacitor and resistor means is adjustable to control the duration of said signal.

14. A brake force control system according to claim 2, characterized in that the coupling means is operable in such a manner that the duration of the signal changes with changes in temperature.

15. A brake force control system according to claim 14, wherein the temperature is the ambient temperature.

16. A brake force control system according to claim 14, characterized in that said temperature is the temperature of the brake medium.

17. A brake force control system according to claim 14, characterized in that the temperature is the temperature of the brake disc.

18. A brake force control system according to claim 1, characterized in that a line controlling the inlet valve means is connected with the coupling means including capacitor means and resistor means.

19. A brake force control system according to claim 18, characterized in that the coupling means includes line sections interconnecting the line controlling the inlet valve means with a line controlling the outlet valve means.

20. A brake force control system according to claim 18, characterized in that at least one of said capacitor and resistor means is adjustable to control the duration of said signal.

21. A brake force control system according to claim 1, characterized in that said coupling means is responsive to a signal for closing the inlet valve means for simultaneously supplying the associated outlet valve means with a short duration signal for opening the outlet valve means for a defined period.