US PATENT SUBCLASS 701 / 71
.~.~ Antiskid, antilock, or brake slip control

Current as of: June, 1999
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701 /   HD   DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION

1  DF  VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION {19}
70  DF  .~ Indication or control of braking, acceleration, or deceleration {3}
71.~.~ Antiskid, antilock, or brake slip control {6}
72  DF  .~.~.~> During cornering or turning of vehicle
73  DF  .~.~.~> On split coefficient surface (u)
74  DF  .~.~.~> Having particular means to determine a reference value for wheel slippage or pseudo-vehicle speed {1}
76  DF  .~.~.~> Fail-safe system
77  DF  .~.~.~> Artificial intelligence (e.g., fuzzy logic)
78  DF  .~.~.~> Control of brake pressure {3}

DEFINITION

Classification: 701/71

Antiskid, antilock, or brake-slip control:

(under subclass 70) Braking, acceleration, or deceleration control wherein the electrical data processing system or calculating computer utilizes information received concerning vehicle speed, wheel speed, or any derivatives thereof in determining activation of the appropriate speed altering

action to control an undesired sliding, binding, or engagement of a vehicle, or its wheel, due to wheel deceleration.

(1) Note. Skid control is a process of controlling the vehicle to enhance the braking performance during the deceleration of the vehicle by manipulating the brake pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82+, for undesired vehicle wheel spinning control wherein such spinning is caused by excessive wheel acceleration.

SEE OR SEARCH CLASS

180, Motor Vehicles,

197, for traction control systems combined with vehicular structure. 280, Land Vehicles,

757+, for an attachment relating to antiskid or antislide.

303, Fluid-Pressure Brake and Analogous Systems,

139+, for traction control which includes specific structure to fluid-pressure brakes.

361, Electricity: Electrical Systems and Devices,

238, for electrical speed signal circuitry used for antiskid/antilock detection void of significant data processing techniques.