IPC 6 English version B60T !A-B60T 11/34

B60T-B60T01134

SECTION B– PERFORMING OPERATIONS; TRANSPORTING

B 60

VEHICLES IN GENERAL

B 60 T

VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS, OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicles, in general B 60 L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F 16 D)

Note

In this subclass, the following expression is used with the meaning indicated:

–

"brake control systems" includes brake control systems for vehicles or of general applicability.

Arrangements of braking elements, i.e. of those parts where braking effect occurs

acting by retarding wheels

acting directly on tread

acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission

using fluid or powdered medium

087

in hydrodynamic, i.e. non-positive displacement, retarders [3]

093

in hydrostatic, i.e. positive displacement, retarders [3]

by utilising wheel movement for accumulating energy, e.g. driving air compressors (using propulsion unit as braking means, see the relevant class)

acting otherwise than by retarding wheels, e.g. jet- action

directly on road (portable devices, e.g. chocks, B 60 T 3/00)

by increasing air resistance, e.g. flaps

Portable devices for preventing unwanted movement of vehicles, e.g. chocks

Vehicle modifications to facilitate cooling of brakes

Brake control systems or parts thereof

Brake-action initiating means

for personal initiation

foot-actuated

Disposition of pedal

hand-actuated

Disposition of hand control

for automatic initiation; for initiation not subject to will of driver or passenger

operated upon collapse of driver (dead-man's devices for electrically-propelled vehicles B 60 L 3/02)

operated by remote control, i.e. initiating means not mounted on vehicle

operated by wayside apparatus

specially adapted for trailers, e.g. in case of uncoupling of trailer (inertia-actuated overrun brakes B 60 T 13/08)

initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle [4]

Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force (by changing number of effective brake cylinders in power brake systems B 60 T 17/10)

responsive to vehicle weight or load, e.g. load distribution (B 60 T 8/30 takes precedence; responsive to weight and speed condition B 60 T 8/58) [4]

with stepwise control action

with continuous control action

responsive to vehicle inclination or change of direction, e.g. negotiating bends

characterised by producing differential braking between front and rear wheels

responsive to deceleration [4]

responsive to load [4]

responsive to a speed condition, e.g. acceleration or deceleration (B 60 T 8/28 takes precedence; electric devices on electrically propelled vehicles indicating the wheel slip B 60 L 3/10; measuring linear or angular speed per se G 01 P 3/00) [4]

having a fluid pressure regulator responsive to a speed condition [4]

including a pilot valve responding to an electromagnetic force [4]

including valve means of the relay or driver controlled type [4]

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 [4]

having expanding chambers for controlling pressure [4]

co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device [4]

the pressure being reduced by exhausting fluid [4]

connecting the brake actuator to an alternative or additional source of fluid pressure [4]

having means for controlling the rate at which pressure is reapplied to the brake [4]

Torque sensing, i.e. wherein the braking action is controlled by forces producing or tending to produce a twisting or rotating motion on a braked rotating member [4]

by mechanical means [4]

having means for changing the coefficient of friction [4]

responsive to speed and another condition or to plural speed conditions [4]

Note

In this group, a single condition which is itself responsive to, or representative of, another single condition is not regarded as plural conditions. [4]

using electrical circuitry for controlling the braking action, the circuitry deriving a control function relating to the dynamic of the braked vehicle or wheel [4]

wherein the individual vehicle wheels are provided (i) with self-contained braking systems operating the individual wheels in accordance with its dynamic state or (ii) with a central processing unit which receives input from individual wheels or wheel groups and produces a plurality of control signals for separately operating individual wheels or groups of wheels [4]

wherein the controlled braking action is characterised by the manner in which the braking fluid pressure is reduced or reapplied [4]

wherein the braking action is responsive to the difference between a computed or other theoretical vehicle speed and an actual speed of a wheel thereof [4]

wherein the braking action is controlled by a difference between the rate of change of vehicle velocity and the rate of change of wheel velocity [4]

sensing both acceleration and deceleration of either the vehicle or the wheel [4]

responsive to a difference between a speed condition, e.g. deceleration, and a fixed reference (B 60 T 8/66 takes precedence) [4]

sensing a rate of change of velocity [4]

two or more sensing means from different wheels indicative of the same type of speed condition [4]

using electrical circuitry for controlling the braking action, the circuitry deriving a control function relating to the dynamics of the braked vehicle or wheel [4]

Means sensing a rate of change of velocity [4]

two or more sensing means from different wheels indicative of the same type of speed condition [4]

wherein two wheels or wheel groups are controlled in dependence on the behaviour of a reference wheel or wheel group, with means for changing the reference wheel, e.g. "select high, select low" operation [4]

wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs [4]

with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means [4]

using a simulated speed signal to test speed responsive control means [4]

automatically taking corrective action [4]

on a fluid pressure regulator [4]

on speed responsive control means [4]

10/

Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope [4]

10/

with hydrodynamic brake [4]

10/

with hydrostatic brake [4]

11/

Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant (the power assistance or drive being essential B 60 T 13/00) [5]

11/

transmitting mechanically [5]

11/

Equalising arrangements [5]

11/

providing variable leverage [5]

11/

transmitting by fluid means, e.g. hydraulic [5]

11/

the transmitted force being varied therein (B 60 T 11/16 to B 60 T 11/28 take precedence) [5]

11/

the transmitted force being substantially unchanged [5]

11/

Master control, e.g. master cylinders (master cylinders associated with vacuum boosters B 60 T 13/565) [5]

11/

Connection thereof to initiating means [5]

11/

Tandem, side-by-side, or other multiple master-cylinder units [5]

11/

with two pedals operating on respective circuits, pressures therein being equalised when both pedals are operated together, e.g. for steering (steering non-deflectable wheels or endless tracks by differentially driving ground-engaging elements on opposite vehicle sides using brakes as main steering effecting means B 62 D 11/08) [5]

11/

characterised by being integral with reservoir [5]

11/

224

with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another [5]

11/

228

Pressure-maintaining arrangements, e.g. for replenishing the master cylinder chamber with fluid from a reservoir (B 60 T 11/232 takes precedence) [5]

11/

232

Recuperation valves [5]

11/

236

Piston sealing arrangements [5]

11/

Single initiating means operating on more than one circuit, e.g. dual circuits (multiple master-cylinder units B 60 T 11/20) [5]

11/

Reservoirs (integral with master controls B 60 T 11/22) [5]

11/

Valves specially adapted therefor (recuperation valves B 60 T 11/232) [5]

11/

Bleed valves for hydraulic brake systems [5]

11/

Automatic cut-off valves for defective pipes [5]

11/

Pressure-reducing or limiting valves [5]

B60T 13/00 - B60T 105:00