Vehicle antiskid brake control system

Claim 2

An antiskid brake control system for a vehicle comprising: a. monitoring means for generating a plurality of different wheel behavior signals representative of the dynamic conditions of a respective wheel of the vehicle; b. valve means for modulating operator controlled fluid brake pressure supplied to a brake device of said wheel; c. evaluation means to which said wheel behavior signals are connected for controlling said modulating valve means according to the dynamic behavior of said wheel; the improvement comprising d. timing means for effecting said connection of at least one of said wheel behavior signals to said evaluation means and for providing first and second timing periods, said second timing period being established following expiration of said first timing period, said connection of said at least one of said wheel behavior signalS being interrupted by said timing means during said second time period when the time duration of said at least one of said wheel behavior signals is less than the time duration of said first time period.

Claim 3

The system as recited in claim 1, further characterized in that said second time period is of longer time duration than said first time period.

Claim 4

The system as recited in claim 1, further characterized in that said at least one of said wheel behavior signals is generated when the wheel deceleration exceeds a certain threshold level.

Claim 5

The system as recited in claim 1, wherein said timing means comprises: a. first and second parallel circuit paths via which said at least one of said wheel behavior signals is connected to said evaluation means; b. first means for establishing said first time period during which said connection of said at least one of said wheel behavior signals via said first path is interrupted, and c. second means for establishing said second time period during which said connection of said at least one of said wheel behavior signals via said second path is interrupted.

Claim 6

The system as recited in claim 4, wherein said timing means further comprises: a. an OR gate having first and second inputs to which said first and second circuit paths are connected and an output for connecting said at least one of said wheel behavior signals to said evaluation means when said at least one of said wheel behavior signals is present at either one of said first and second inputs; b. an AND gate having one input and an output connected in said second circuit path; c. said first means including a first timer in said first path for providing said first time period during which connection of said at least one of said wheel behavior signals via said first circuit path is interrupted; and d. said second means including a second timer subject to the output of said first timer upon expiration of said first time period for establishing said second time period during which the output of said second timer is connected to another input of said AND gate to disable the output thereof so as to interrupt connection of said at least one of said wheel behavior signals via said second path.

Claim 7

The system as recited in claim 5, further characterized in that said first timer is actuated after a certain time delay following the appearance of said at least one of said wheel behavior signals to establish said first time period.

Claim 8

The system as recited in claim 6, further characterized in that the output of said second timer is maintained an extended time duration following expiration of said first time period to establish said second time period.