Abstract: An autonomous driving vehicle provides a driverless transportation service for a user. An alarming phenomenon is a natural phenomenon that potentially causes a disaster. The autonomous driving vehicle recognizes, based on driving environment information, the alarming phenomenon at a current location of the autonomous driving vehicle or on a planned travel route from the current location to a destination. When recognizing the alarming phenomenon, the autonomous driving vehicle determines whether to continue or halt vehicle travel control in accordance with a current travel plan. When determining to halt the vehicle travel control in accordance with the current travel plan, the autonomous driving vehicle sets an emergency plan depending on a type of the alarming phenomenon and controls the autonomous driving vehicle in accordance with the emergency plan.

Abstract: An exemplary gate valve includes a valve body having a gate cavity intersecting a through bore, the gate cavity extending through a first end of the valve body, an inner surface forming the gate cavity is angled outward from a center axis of the gate cavity to a gate cavity opening at the first end, and a gate positioned in the gate cavity and moveable between a closed position blocking flow through the through bore and an open position allowing flow through the through bore, the gate having a sealing face extending perpendicular to the through bore.

Abstract: Valve and related assemblies, systems, and methods may include a self-cleaning feature that may be configured to at least partially displace material from a portion of the valve. Such valves may be utilized in a pressure exchanger.

Abstract: Brake modulators for parking brake systems of work vehicles are provided. A brake modulator includes a housing defining a fluid chamber, an auxiliary chamber, a fluid inlet channel, and a fluid outlet channel. The brake modulator further includes a piston disposed within the housing between the fluid chamber and the auxiliary chamber. The piston is movable between a first position wherein the fluid chamber has a first volume and a second position wherein the fluid chamber has a second volume greater than the first volume. The brake modulator further includes a biasing element providing a biasing force on the piston towards the first position, a rod extending between a first end disposed within the housing and a second end disposed exterior to the housing, and a handle connected to the second end of the rod. The rod is manually actuatable to move the piston between the first and second positions.

Abstract: A foot brake valve for operating a vehicle brake system associated with wheels of the associated vehicle includes a plunger, a primary piston, and a volute spring. The plunger is positioned based on a position of an associated brake pedal depressed by an operator for engaging an associated service brakes of the vehicle. The primary piston positioned based on a position of the plunger. The volute spring biases the primary piston against a depression of the brake pedal.

Abstract: A vehicle hand control brake valve includes a piston, positioned based on an engagement of a vehicle parking brake, a service brake actuation valve, and a control mechanism. The control mechanism mechanically interacts with the service brake actuation valve to set a position of the service brake actuation valve. A level of actuation of vehicle service brakes is set based on the position of the service brake actuation valve. The service brake actuation valve is set to a position to actuate the service brakes when the control mechanism is set to a latch position. The control mechanism only is latched in the latch position when the vehicle parking brake is engaged.

Abstract: A configurable control valve for use with air brake systems is provided. This control valve includes: a first or top body portion, a second or bottom body portion, and a connector for attaching the first body portion to the second body portion. The first body portion may include an actuator or handle having either a linear translation a rotational translation, and the second body portion may include either horizontal or vertical port configurations. The connector cooperates with the first body portion and the second body portion to provide complete 360° lateral rotation of the body portions relative to one another.

Abstract: A locking control valve is provided. This control valve includes a valve body that further includes a first locking member, and a handle attached to the valve body. The handle is moveable between a first position and a second position for controlling the operation of the valve and further includes a second locking member. The first locking member and the second locking member cooperate with one another to retain the handle in the second position when so desired by the operator of the vehicle.

Abstract: A safety angle cock air-bleeding in a multi-mode and having a ball core revolved in a single direction is of switch valves used in a train air brake system.

Abstract: A configurable control valve for use with air brake systems is provided. This control valve includes: a first or top body portion, a second or bottom body portion, and a connector for attaching the first body portion to the second body portion. The first body portion may include an actuator or handle having either a linear translation a rotational translation, and the second body portion may include either horizontal or vertical port configurations. The connector cooperates with the first body portion and the second body portion to provide complete 360° lateral rotation of the body portions relative to one another.

Abstract: A cancer thermotherapy apparatus of the present invention has an ortho-hexahedral cavity resonator and a loop antenna on a upper inner wall surface of the cavity resonator. The loop antenna is attached so that its loop face can be parallel to two side inner wall surfaces which are opposed each other, and orthogonal and adjacent to the upper inner wall surface. A high frequency electric power introduced into the cavity resonator is resonated in the parallel direction to the side wall surfaces on an excited mode with a constant electric field intensity along the side wall surfaces. A human body is set in the direction parallel to the side inner wall surfaces in the cavity resonator, and the resonated high frequency electric power is applied to the human body.

Abstract: The present invention discloses a liquid pressure control device (1) for load responding brake. This liquid pressure control device (1) comprises valve mechanisms (5) and (6) for reducing liquid pressure from a brake master cylinder and transmitting reduced liquid pressure to rear wheel brake cylinders, these operations being performed by opening/closing valves with a pair of plungers (3) and (4) which respond to loads independently of each other by the liquid pressure from the brake master cylinder, and a load sensing mechanism (11) for moving the pressure reducing operation starting points of the valve mechanisms (5) and (6) by applying loads to the plungers according to the movable load amount of a vehicle. A recessed section (14b) is formed in a portion of an equalizer (14) brought into contact with a load sensing lever (13), and a buffer member (19a) made of an elastic material is fixed in this recessed section (14b).

Abstract: A tamper-resistant independent brake valve device for use in a brake equipment on railway locomotives including a main body casing carrying a movable handle, a rotatable cam, a pivotal cam dog and an exhaust and supply valve assembly, a spring housing attached to the main body casing by a plurality of one-way screws, a break-away adjusting screw for setting the maximum brake cylinder pressure on the railway locomotive, the pivotal cam dog including an enlarged head portion to preclude the insertion of a prying tool, and the pivotal cam dog having cam engaging roller which is rotated on a round head roller pin.

Abstract: A brake apply control system for a vehicle. The control system has a selectively operable mechanical brake apply portion and a selectively operable hydraulic brake apply portion. The mechanical brake apply portion includes an operator linkage for connecting the operator with a mechanical brake apply mechanism and a hydraulic piston and valve combination for providing a hydraulic feedback force to the operator. The hydraulic brake apply portion includes a source of hydraulic pressure, a brake apply valve for supplying a selective brake signal of variable intensity in response to operator input, a conduit system which connects the source of hydraulic pressure to the hydraulic piston and valve combination and which communicates the brake signal to the hydraulic piston and valve combination.

Abstract: A brake control has a regulator valve to establish the pressure in the brake system during brake apply. A flow regulator valve permits a fast flow rate for filling of the system when brake apply is initiated and a slow flow rate when the brake system pressure approaches the value established by the regulator valve.

Abstract: A vehicle brake system comprises two pressure modulators (16, 18) one of which (16) is associated with one of the brake circuits (12) and the other of which (18) is associated with the other (14) of the brake circuits. The modulators (16, 18) are accommodated in a housing, preferably in the form of a twin arrangement, and are actuated by means of a common drive unit. The pressure modulators (16, 18) each include a plunger piston (78) which is acted on by a differential gear in the common drive unit. In a first embodiment, a vacuum servo drive (20) serves as the drive unit and the differential gear comprises a linear guiding element (106) and an angular lever (112) articulated thereto. The force required to hold down the plunger pistons (78) in their initial position can be applied mainly pneumatically. A ventilatable chamber (M2) of the vacuum servo drive (20) being connected for that purpose with the ventilatable working chamber (B2) of a vacuum brake power booster (32 ).

Abstract: In its simplest form, the valve comprises a body with an inlet connector and an outlet connector intended to be connected to a pressure source and a pneumatic circuit respectively. In the body, a valve comprising a seat and an obturator controls communication between the connectors. A control piston is sealingly slidably mounted in the body and, in its working travel, can cause controlled movement of the obturator away from the seat to cause controlled opening of the valve. According to the invention, the seat of the valve is formed in a member mounted in the body for movement in the direction of displacement of the obturator. A member is operatively associated with the piston and intended to cause a displacement of the seat relative to the body together with and in contact with the obturator when the control piston passes beyond a predetermined position relative to the body in its working travel.

Abstract: A brake power-controlled brake device for automotive vehicles is provided with a hydraulic master cylinder (11) which is, via a pneumatically actuated pressure modulator (12), connected to at least one wheel cylinder brake circuit I. The pressure modulator (12) comprises a vacuum power generator (20) and a compensating cylinder (18) equipped with a hydraulic piston (16, 16' or 16"), connected to which compensating cylinder is the wheel cylinder brake circuit I. If a brake slip signal occurs, the piston wall (14) of the vacuum power generator (20), which piston wall is normally applied by a vacuum on both sides, is temporarily connected with a higher pressure in the direction in which the volume in the compensating chamber (32) is increased. In addition, an isolating valve (15) is provided which is normally open but is closed when a brake slip signal occurs, and which is inserted in the connecting line (19) from the master cylinder (11) to the compensating chamber (32).

Abstract: A brake pressure control system for a wheeled vehicle includes a swingable lever pivotally mounted at a first end portion thereof to a sprung mass of the vehicle such as a body frame, a first tension coil spring connected at a first end thereof to the sprung mass and at a second end thereof to a second end portion of the swingable lever to bias the lever toward the sprung mass, a second tension coil spring connected at a first end thereof to an unsprung mass of the vehicle such as a wheel axle and at a second end thereof to the second end portion of the swingable lever to bias the lever against the biasing force of the first spring, a bushing rotatably mounted on the second end portion of the swingable lever, the bushing being formed with a first support portion for retaining the second end of the first spring and a second support portion for retaining the second end of the second spring, and a modulator valve secured to the sprung mass and incorporated in a hydraulic connection between a master cylinder and

Abstract: A dual circuit brake valve is provided with a delivery differential control mechanism which controls the differential between the delivery pressures of the primary and secondary braking circuits. The delivery differential control mechanism includes a spring retainer which is mounted on the end of the stem of the relay valve and which receives a spring-biased plunger. The plunger engages with the actuating member during the brake application to thereby transfer the force of the spring to the relay member and therefore to the valve members of the secondary circuit. This transfer of the spring force reduces the crack open pressure of the valve members controlling communication through the secondary circuit, to thereby reduce the differential between the pressures generated and the primary and secondary circuits.

Abstract: This invention relates to a flange-type stop cock having a ball valve plug. This ball-valve stop cock is so constructed as to have the same profile or outline as the flange portion of the existing flange-type stop cock having a conical-shaped valve plug. The flange mounting holes and the input and the output fluid openings are designed to conform with that of existing pipe seat brackets so that the present ball-shaped plug stop cock is a direct replacement for the conical-shaped plug stop cock.

Abstract: The invention is related to a brake pressure control unit which is pilotable load-sensitively through a pilot device, a spring device, and a transmission lever. The pilot device includes a first pilot element being fastened to an unsprung member of the vehicle which is movable load-sensitively relating to the housing which is mounted to a spring member of the vehicle. The pilot device also includes a spring positioned between both the two pilot elements. Mounting of the unit to a lifted vehicle is provided by locking the transmission lever is a predetermined position by locking the pilot element together. A gauge loads the second pilot element to the transmission lever in the predetermined position. The two pilot elements are rigidly coupled to each other by a coupling member during installation to form a constructional unit of a predetermined length.

Abstract: The invention overcomes the problem of a cocking valve in a pressure control unit for use in a vehicle braking system. The valve is provided with a body assembly defining an external cylindrical surface slidably engaging the internal surface of a valve chamber, the engaged cylindrical surfaces having sufficient axial extent as to positively prevent said valve from cocking or moving laterally out of a co-axial position with a movable valve seat.

Abstract: In a self-lapping type control valve device, a check valve is provided by means of a seal at the interface of the control piston diaphragm and a recess in which the diaphragm is connected to the valve body, the seal being effective to isolate a control chamber on one side of the control piston from a constant pressure chamber on the opposite side when the control piston is actuated in response to a reduction in the control chamber fluid pressure to initiate a brake application. This seal is displaced from a ridge at the opening of the recess with which the diaphragm is also engageable when actuation of the control piston occurs in response to a relatively large reduction of the control chamber pressure.

Abstract: A hydraulic servo vehicle brake with a tandem master cylinder wherein the first master piston (24) is provided with a cylindrical axial bore toward the piston pressure chamber (76). A second master piston (80) extending to the master cylinder bottom (79) is tightly slidably arranged in the axial bore. A non-return valve (23) provided as a sealing cup is provided between the second master piston (80) and the annular portion (24"') of the first master piston (24). Between that portion of the second master piston (80) which projects from the axial bore (78) and the master cylinder (11), an annular chamber (22) is provided which is linked with a three-position two-way valve (33) controlled by the controlled pressure. With no application of controlled pressure, the three-position two-way valve (33) links the annular chamber (22) to the fluid reservoir (27). In the presence of a slight controlled pressure, the valve (33) interrupts the link.

Abstract: In the process, a spring device is pivotally connected to a transmission lever which is movable between two defined positions. The free end of the spring device is subjected to a defined load and is fixed stationary while the transmission lever is in the defined position corresponding to the closing position of the valve. Thereupon, the length of the prestressed spring device is fixed, which results after swiveling of the transmission lever into the other defined position. The effect of the spring tolerances on the precision of adjustment of the change-over point is excluded. The brake pressure control unit apparatus is provided with first and second stop elements fastened to the spring device with a removable spacing element inserted between the stop elements. The distance between the stop elements corresponds to a determined amount of spring preload fixed by the spacing element.

Abstract: Control device for a braking corrector (10) capable of being imposed between a source of hydraulic pressure and a motor vehicle braking circuit, of the type incorporating a casing (12) provided with at least one bore (14, 14') a plain or differential hydraulic piston (16, 16') sliding in the bore (14, 14') and defining in it a first pressure chamber (18, 18') and a second pressure chamber (22, 22') which are capable of being joined to the source of pressure and to the braking circuit, respectively, the piston (16, 16') controlling the flow of a fluid under pressure between the chambers, the control device incorporating a pilot piston (48) for fluid capable of generating a pilot force (Fp) upon the hydraulic piston (16, 16') so as to push the latter toward the inside of the casing (12) in the direction in which the flow of fluid is established, the fluid under pressure generating a reaction force (Fr) pushing the piston (16, 16') toward the outside of the casing (12) in the direction in which the flow of fluid

Abstract: A relay valve for a vehicle brake system having an operating piston which moves in one direction in response to entry of a control pressure into one part of the valve and which by that movement causes an orifice to open whereby working pressure is allowed to enter another part of the valve and pass from there through various outlets. There are six outlets and each is connected to a respective brake assembly of the vehicle brake system. A damping piston is connected to the operating piston so as to move therewith and is subjected to the same pressure as that acting against one side of the operating piston but in a manner such as to provide resistance to movement of the operating piston in the aforementioned one direction.

Abstract: The invention concerns a braking corrector (10) of the type incorporating at least one piston (16, 16') provided with a passage joining the inlet chamber (18, 18') and the outlet chamber (22, 22') to one another, a valve (26, 26') controlling the communication through the passage, a control device (34) generating a pilot force which is capable of being applied to the piston (16, 16'), pushing the latter in the direction of opening of the valve (26, 26'); the invention provides the corrector (10) with a device (52) for monitoring the pilot force which is capable of limiting the latter when the reaction force generated by the pressure on the piston (16, 16') exceeds the pilot force by a predetermined amount.

Abstract: A hydraulic pressure control valve for use with two independent rear braking systems, for transmitting braking hydraulic pressure to wheel cylinders in two rear wheels of a vehicle through two independent pipings. The control valve has a pair of valves, a pair of parallel pistons disposed in a single housing, and an actuating mechanism for displacing the pistons according to vehicle load. The actuating mechanism consists of a lever capable of rocking in a plane, a spring member for applying a force corresponding to the vehicle load to the rocking end of the lever, a support pin having both ends fitted in two grooves that extend parallel to the axes of the pistons and are equidistant from these axes, an equalizer which comes into abutment with one end of each piston at its either end. The equalizer is supported on the pin such that it can rock about its recessed center.

Abstract: The invention overcomes the problem of a cocking valve in a pressure control unit for use in a vehicle braking system. The valve is provided with a body assembly defining an external cylindrical surface slidably engaging the internal surface of a valve chamber, the engaged cylindrical surfaces having sufficient axial extent as to positively prevent said valve from cocking or moving laterally out of a co-axial position with a movable valve seat.

Abstract: A selector valve for a vehicle braking system in which brakes mounted on opposite sides of the vehicle can be operated selectively either together or independently, comprises an operating lever (9) for displacing a valve spool (2) to control communication between inlet ports (3,4) and outlet ports (5,6), the lever being guided by a slot (8) which includes latching notches (20) in which the lever is engageable to preselect a particular steering mode of brake operation. The lever is automatically disengaged from the notches after each brake operation by a piston (15) which is actuated by the fluid pressure in a chamber (16) connected to an inlet port (4).

Abstract: According to the invention, the communication between the supply orifice (40,41) and the corresponding pressure chambers (38,39) of the master-cylinder (11) is tested while the stop (25) defining the rest position of the piston (15) of the servo is being displaced, and this stop (25) is finally immobilized by crimping when the correct position of the stop has thus been found.

Abstract: The braking pressure corrector is controlled by the load of the vehicle by means of a controlling unit. This controlling unit (20) comprises a push rod (22), a preloading spring (26) exerting a thrust of fixed magnitude on the push rod (22), and a controlling spring (42) exerting on the push rod, through a reversing device (36), a traction of variable magnitude as an inverse function of the load of the vehicle. According to the invention, the reversing device (36) is mounted to pivot with respect to the casing (12,24) of the corrector by means of an articulation (38) of the swivel joint type.

Abstract: Apparatus for adjusting a mechanically operable load-dependent braking force regulator including a control shaft having a cam surface for setting the axial position of a push rod which controls a valve for supplying brake-operating pressure according to the axial position of said push rod. The axial position of the push rod is set by the cam surface on the control shaft which is rotated through a lever reflecting the actual vehicle load. The regulator may be set at a location away from the vehicle, such as a test rack, then installed on the vehicle. Thus it is not necessary to transport the testing equipment to the vehicle.

Abstract: A brake pressure control valve for controlling the pressure in two pressure circuits. The control valve includes two control valve units arranged side by side in a housing, and each control valve unit comprises a piston and a spring acting on the piston to determining a valve closing pressure. A device for adjusting the spring force of either one of the springs for adjusting the valve closing pressure of one control valve unit with respect to the other control valve unit.

Abstract: Dual circuit pressure control valves for brake system are known in which the control pistons are located parallel to each other with each control piston controlling a different one of two brake circuits. Both control pistons are loaded by a common preloading force. The known arrangement is complicated in its construction and has a large overall length. According to the present invention, the construction is simplified and the overall length is reduced by providing a torsion spring which provides the preloading force acting on the control pistons via stationarily supported swivelling levers.

Abstract: Dual circuit brake force control units are known in which the initial preloading force is changeable dependent on the vehicle load. The preloading force is distributed to the control pistons by means of a lever. Due to the tolerances and erosion of the individual elements, considerable differences in pressure in both brake circuits may occur. Therefore, according to the present invention a lever is provided which directly acts on both control pistons and which is rotatable around an axis parallel to the direction of displacement of the control pistons and additionally around the longitudinal axis of the lever. The lever is in interaction with its housing mount at one support point at least and at two support points at the most with the support point or support points being located at least approximately in the longitudinal axis of the lever.

Abstract: A hydraulic control system, for at least one hydraulic braking circuit, comprising a control unit, a brake pedal, an assisting hydraulic pressure plant having a fluid pressure source and a reservoir, a distributor valve having a slide fitted movably in the control unit between a rest position, when the braking circuit connects with the reservoir, and an active position, when the braking circuit is pressurized. This slide is urged in one direction by the pedal and in the opposite direction by the pressure in the braking circuit. The slide moves only about a millimeter, and to give the driver a resonable pedal displacement, a first resilient device, in the form of either stepped parallel or in series helical springs or an elastomer block, is disposed between the pedal and slide.

Abstract: A relay valve for use in vehicle air brake systems has a housing with a service port, supply port, delivery ports and an exhaust port. A piston and shuttle are movable within the housing to control communication between the ports. The shuttle carries a seal member which, in the closed position, is in sealing relation with both the piston and the housing, thereby closing communication between the supply and delivery ports and between the delivery and exhaust ports. There are means to vent pressure buildup behind the shuttle seal thereby preventing accidental blowout of the seal.

Abstract: A brake modulation valve includes a spool reciprocable in a body to provide application and release of the brakes of a vehicle through movement of a pedal, the movement of the pedal providing application of the brakes being resisted by resilient means in the form of primary, secondary and tertiary springs brought into play in series fashion so that the operator of the pedal is aware of varying pedal feel during application of the brakes.