ZF CV Systems Europe Patente

A protection valve (10) for a commercial vehicle is provided which is electronically controllable. The protection valve (10) comprises a casing (11). The casing comprises a supply conduit (13) configured to receive gas (G), a circuit conduit (14) configured to provide the gas (G) to a pneumatic circuit of the commercial vehicle, and a bypass conduit (16). The protection valve (10) comprises a shut-off element (30) disposed in the casing (11) and displaceable to selectively open and close a gas passage between the supply conduit (13) and the circuit conduit (14). The protection valve (10) comprises a solenoid valve (40) accommodated within or projecting into the casing (11). The solenoid valve (40) is energizable and deenergizable to selectively cause the displacement of the shut-off element (30) by establishing a bypass flow through the solenoid valve (40) and the bypass conduit (16). Techniques of operating the protection valve (10) are also disclosed.

The invention relates to piston device (1) for a valve device (30), said piston device (1) comprising: a piston (2) and a nut (3), said piston (2) comprising a piston head (4), a piston rod (5) extending from the piston head (4) in an insertion direction (ID) to a piston front end (6), an external thread (8), a first abutment face for stopping an insertion movement in said insertion direction (ID), and a first locking means, said nut (3) comprising an internal thread (12), a second abutment face for contacting the first abutment face, and a second locking means for interlocking with said first locking means (10), wherein in an inserted position said external thread (8) being screwed into said internal thread (12) in a first rotation direction (R1), and said first abutment face and said second abutment face contacting each other thereby defining the relative position of the piston (2) in said nut (3), and wherein in said inserted position said first locking means (10) being interlocked or blocked with said second locking means, thereby preventing a relative rotation of said piston (2) in a second rotation direction (R2) that is reverse to said first rotation direction (R1).

A pressure limiting valve (10) for a commercial vehicle is provided which is electronically controllable. The pressure limiting valve (10) comprises a casing (11). The casing comprises a supply conduit (13) configured to receive gas (G), a circuit conduit (14) configured to provide the gas (G) to a pneumatic circuit of the commercial vehicle, a control conduit (16), and an exhaust (15). The pressure limiting valve (10) comprises a shut-off element (30) disposed in the casing (11) and displaceable to selectively allow the gas to flow from the supply conduit (13) to the circuit conduit (14). The pressure limiting valve (10) comprises a solenoid (41) disposed in or projecting into the casing (11) and energizable to selectively cause the displacement of the shut-off element (30). Techniques of operating the pressure limiting valve (10) are also disclosed.

Particle trapping arrangement (100) for a disc brake (250) of a vehicle (200a), in particular utility vehicle (200b); wherein the particle trapping arrangement (100) comprises a brake cover (210) adapted to be mounted on a brake carrier (260) of the disc brake (250) and/or on a brake caliper (270) of the disc brake (250); the brake cover (210) is adapted to at least partially encapsulate a brake rotor (280), the brake caliper (270) and/or brake pads (275) of the disc brake (250); the brake cover (210) comprises a lateral surface (215), wherein the lateral surface (215) is extended along a rotation axis (A) of the brake rotor (280) and is extended at least partially along a circumferential direction (C) of the brake rotor (280); the brake cover (210) comprises a trapping structure (220) arranged on a radially inner side (216) of the lateral surface (215); and the trapping structure (220) comprises a plurality of radially inwardly extended projections (225) adapted to trap brake particles.

Retaining spring (100) for a disc brake (250) for a vehicle (200a), in particular utility vehicle (200b); wherein the spring (100) comprises a band-shaped body (110); the body (110) is made of metal; the spring (100) comprises a first end (111) and a second end (112); the body (110) extends between the first end (111) and the second end (112); the spring (100) comprises a first bend (105) at which the body (110) is curved in a first bending direction (b1); the spring (100) comprises a second bend (106) between the first bend (105) and the second end (112) and at which the body (110) is curved in a second bending direction (b2) opposite to the first bending direction (b1); and the spring (100) comprises a third bend (107) between the second bend (106) and the second end (112) and at which the body (110) is curved in the first bending direction (b1).

The invention relates to a valve assembly (1) for pressure control and circuit protection in a vehicular pneumatic circuit (2), comprising: - an inlet (3) configured to receive compressed air (12) from a supply, - an outlet (4) configured to provide compressed air (12) to the vehicular pneumatic circuit (2), - a first switching valve (5) and a second switching valve (6) arranged in parallel between the inlet (3) and the outlet (4), - a first pressure sensor (7) being arranged downstream of the first switching valve (5) and the second switching valve (6) and being configured to provide an outlet pressure signal (p<1>), and - a control unit (8) configured to o receive the outlet pressure signal (p<1>) from the first pressure sensor (7), o determine ▪ a circuit cut-off condition (10) of the vehicular pneumatic circuit (2) based on the outlet pressure signal (p<1>), ▪ a compressed air demand (9) of the vehicular pneumatic circuit (2) based on the outlet pressure signal (p<1>) and a predefined set pressure value (15) of the vehicular pneumatic circuit (2), and/or ▪ a time control condition (18) for providing compressed air (12) to the vehicular pneumatic circuit (2) according to a stored time control setting (19), and o actuating at least one of the first switching valve (5) and the second switching valve (6) depending on the determined circuit cut-off condition (10), compressed air demand (9) and/or time control condition (18).

Spring brake actuator (250) for a pneumatic braking system (210) of a vehicle (200a), in particular utility vehicle (200b), wherein the spring brake actuator (250) comprises: a housing (50) having a circumferential portion (52) and a housing base (51) with an opening (53); a brake release bolt (111), wherein the brake release bolt (111) projects through the opening (53); a nut (113) for cooperating with the brake release bolt (111); a fitting member (125) arranged at the opening (53) for positioning the brake release bolt (111); a spring member arrangement (140) arranged radially outwardly from the brake release bolt (111) and between the nut (113) and the fitting member (125) for exerting an elastic force between the nut (113) and the fitting member (125).

Particle guiding arrangement (100) for an encapsulated disc brake (250) of a vehicle (200a), in particular utility vehicle (200b); wherein the particle guiding arrangement (100) is adapted to be arranged on a brake carrier (260) of the disc brake (250) in a run-out side (261) of the brake carrier (260) and/or of a brake caliper (270); the particle guiding arrangement (100) comprises an opening (110) for connecting a suction system (206) to the opening (110); the particle guiding arrangement (100) comprises an emission directing member (130) for guiding particles and/or air from the run-out side (261) to the opening (110).

The invention refers to a twin chamber air dryer (1) for a pneumatic system of a commercial vehicle, said twin chamber air dryer (1) comprising:a casing (14),a supply inlet (101) to be connected to a compressor,a spool valve comprising a first spool valve outlet (17) to be connected to a first cartridge inlet of a first cartridge and a second spool valve outlet (18) to be connected to a second cartridge inlet of a second cartridge,wherein a first air passage (32) is connecting said supply inlet (101) to said first spool valve outlet (17), and a second air passage (33) is connecting said supply inlet (101) to said second spool valve outlet (18),wherein in a basic condition, said first air passage (32) is open and said second air passage (33) is closed, to form a first supply mode through said first cartridge, and wherein in an actuated condition said second air passage (33) is open and said first air passage (32) is closed, to form a second supply mode through said second cartridge,wherein in a high inlet pressure situation with an inlet pressure at said supply inlet (101) above a pressure threshold, said supply inlet (101) is connected to said first spool valve outlet (17) and to said second spool valve outlet (18).

A spring brake actuator (10) comprises an element (12). The element (12) comprises an aperture (14). The spring brake actuator (10) comprises a sealing element (16) inserted into the aperture (14). The sealing element (16) is at least in part made from a swelling elastomer (18).

Pedal unit (100) for a vehicle (200a), in particular utility vehicle (200b); wherein the pedal unit (100) comprises a housing (110) with a pivot section (115) and a through hole (120); the pedal unit (100) comprises a pedal (140) rotatably pivoted at the pivot section (115), and the pedal (140) is adapted to be actuated; the pedal unit (100) comprises a push rod (145); the push rod (145) is mechanically coupled to the pedal (140) and is adapted to be deflected by an actuation of the pedal (140); and the push rod (145) is adapted to project into and/or through the through hole (120); and the pedal unit (100) comprises a spring seat (150) circumferentially arranged around the through hole (120) and being adapted to support a compression spring (160) for restoring the pedal (140) against an actuation of the pedal (140).

The invention relates to an air dryer (1) for a pneumatic system (2) of a commercial vehicle (3), comprisingan dryer inlet (1a) to be connected to a compressor (4) for receiving compressed air (9) in a supply mode,an dryer cartridge (16), an overflow charging valve (15), a regeneration valve (22) for connecting said dryer cartridge inlet (16a) to said discharge port (1e) in a regeneration mode,and a regeneration path (26) extending between said regeneration port (1c) and said dryer cartridge outlet (16b),wherein a pressure release valve device (12) is provided between said dryer inlet (1a) and said overflow charging valve (15), said pressure release valve device (12) comprising a first position for passing compressed air (9) from a dryer inlet (1a) to said overflow charging valve (15) in said supply mode (I) and a second position for connecting said dryer inlet (1a) to a discharge port (1e) in a feeding line venting mode.

A silencer (50) for a vehicle comprises a noise dampening mesh material (40) and a silencer housing component (10) forming a receptacle for the noise dampening mesh material (40). The silencer housing component (10) comprises an outer wall (20) and an end wall (26). The outer wall (20) extends circumferentially around a center axis (13) of the silencer housing component (10). The end wall (26) forms a concavity (29). A retarding structure (30) comprising at least one wall (31, 32, 33, 34) is arranged in the concavity (29) and projects from the end wall (26). The retarding structure (30) is configured to reduce a rate of gas egress through gas outlet passages of the silencer (50).

A silencer housing component (10) for a pneumatic system for a vehicle comprises an outer wall (20) and an end wall (26). The outer wall (20) extends circumferentially around a center axis (13). A plurality (23) of gas outlet passages are formed through the outer wall (20). The end wall (26) comprises a gas directing structure (30). The gas directing structure (30) forms at least one gas flow channel (31, 32) that curves around the center axis (13).

The invention relates to a spring brake actuator (1) for an air brake system of a motor vehicle, in particular of a commercial vehicle, comprising a brake cylinder (2) having a spring chamber (12), a parking pressure chamber (14), and a spring brake piston assembly (9) that is movably disposed inside the brake cylinder (2) and sealingly separates the spring chamber (12) from the parking pressure chamber (14), wherein the spring chamber (12) comprises a compression spring (11) that is configured to push the spring brake piston assembly (9) from a retracted position towards an extended position as a function of pressurized air being released from the parking pressure chamber (14), wherein the spring brake piston assembly (9) is configured to move towards the retracted position as a function of pressurized air being introduced into the parking pressure chamber (14); and an internal breather valve (21) in fluid communication with the spring chamber (12) and configured to allow for pressure compensation in the spring chamber (12) when the spring brake piston assembly (9) moves towards the extended position. It is proposed to mount the internal breather valve (21) to the spring brake piston assembly (9) in direct fluid communication between the spring chamber (12) and the parking pressure chamber (14).

A spring brake actuator (10) for a vehicle (62). The spring brake actuator (10) comprises a piston (12) and a tube (14). The tube (14) is fixed to the piston (12). The tube (14) is fixed to the piston (12) by a laser welded connection (16).

The invention relates to an exhaust device (1) of a pressure supply for a vehicle (V), in particular a solenoid modulator ABS-valve (2), comprising a body (10) having an exhaust line (120) terminating in an exhaust port (130) for venting the exhaust air flow (FE), and a silencer system (20) arranged in the exhaust line (130) for damping the exhaust air flow (FE). The silencer system (20) includes a silencer device (210) defining an exhaust chamber (211) extending upstream with respect to the exhaust direction (E), and a sealing washer (220) arranged adjacent to the silencer device (210). The invention suggests that the silencer device (210) has a slice-kind base portion (212) and a rim portion (213) projecting therefrom in exhaust chamber (211), wherein the rim portion (213) is adapted to divide the flow chamber (211) into at least a first chamber region (215.1) having a first plurality of flow ports (214.1) and the second chamber region (215.2) having a second plurality of flow ports (214.2), each defining a flow passage (216.1, 216.2) from a distal entrance portion (217) of the rim portion (213) to the respective one of the first or second plurality of flow ports (214.1, 214.2).

Die Erfindung betrifft ein Verfahren (99) für ein Bremsstaubabsaugungssystem (10) mit einer Absaugvorrichtung (40) zum Absaugen von Bremsstaub (36) einer Bremsanordnung (16), die im Bereich eines Rades (12) eines Fahrzeugs (14) angeordnet ist, wobei die Bremsanordnung (16) eine Bremsscheibe (18) oder Bremstrommel, mindestens einen Bremsbelag (32) und einen Bremsaktuator (33) zum Bewegen des Bremsbelags (32) relativ zur Bremsscheibe (18) oder Bremstrommel umfasst. Das Bremsstaubabsaugungssystem (10) oder die Bremsanordnung (16) umfassen einen Sensor (52) zum Erfassen der Bewegung des Bremsaktuators (33), wobei mit einem Steuergerät (38) elektrische Signale (56) von dem Sensor (52) erfasst werden und in Abhängigkeit von den elektrischen Signalen (56) die Absaugvorrichtung (40), insbesondere ein Gebläse (42) der Absaugvorrichtung (40), angesteuert wird.Die Erfindung betrifft ferner ein Steuergerät (38) für ein Bremsstaubabsaugungssystem (10) mit einer Absaugvorrichtung (40) zum Absaugen von Bremsstaub (36), ein Bremsstaubabsaugungssystem (10) zur Absaugung von Bremsstaub (36) einer Bremsanordnung (16) und ein Fahrzeug (14) mit einem Bremsstaubabsaugungssystem (10).

A temperature sensing unit (1), designed for a vehicle brake, comprises a parallel circuit having a first branch (2) with a first thermal switch (SW1) and a second branch (4) with a second thermal switch (SW2). The first thermal switch (SW1) is designed to switch at a first switching temperature indicating a first condition of the vehicle brake, and the second thermal switch (SW2) is designed to switch at a second switching temperature higher than the first switching temperature for indicating a second condition of the vehicle brake.

The invention relates to a vehicular air dryer (10), comprising a dryer inlet (11) configured to receive air from a compressor discharge line (31), a dryer outlet (12) configured to supply dried air, a dryer exhaust (18), a desiccant cartridge (13a) connected or connectable to the dryer inlet (11) via an inlet line (14a) and to the dryer outlet (12) via an outlet line (15a), the desiccant cartridge (13a) being configured to be selectively operated in a drying mode and in a regeneration mode, wherein in the drying mode, the desiccant cartridge (13a) is configured to receive and dry the air from the dryer inlet (11) and to provide the dried air for outputting via the dryer outlet (12), and in the regeneration mode, the desiccant cartridge (13a) is configured to receive and humidify regeneration air from the outlet line (15a) and/or from a regeneration port (16a, 16b) via a regeneration line (17a, 17b, 17c) and to vent humidified regeneration air via the dryer exhaust (18), wherein the vehicular air dryer (10) comprises at least two regeneration lines (17a, 17b, 17c) and wherein the vehicular air dryer (10) is configured to provide a variable amount of regeneration air to the desiccant cartridge (13a) operated in the regeneration mode by selectively providing the regeneration air to the desiccant cartridge (13a) via at least one of the regeneration lines (17a, 17b, 17c).

Spring brake actuator (250) for a pneumatic braking system (210) of a vehicle (200a), in particular utility vehicle (200b), wherein the spring brake actuator (250) comprises: a housing (50) having a circumferential portion (52) and a housing base (51) with an opening (53); a brake release bolt (111), wherein the brake release bolt (111) projects through the opening (53); and a boss element (113a) for cooperating with the brake release bolt (111); wherein the brake release bolt (111) comprises a first groove (120) and the boss element (113a) comprises a second groove (125); the spring brake actuator (250) comprises a retaining member (130); wherein the retaining member (130) is arranged within the first groove (120) and within the second groove (125).

The invention relates to a brake release mechanism (24) for a spring brake actuator (2), in particular a parking or emergency spring brake actuator (2) for use in a commercial vehicle (1), wherein the spring brake actuator comprises a spring brake piston assembly (8) and an actuator power spring (6) configured to push the spring brake piston assembly (8) from a retracted position towards an extended position, said brake release mechanism (24) comprising a brake release bolt (30) that is configured to be rotatably mounted to the spring brake actuator (2), having a first bolt portion (31) that is configured to extend inside of the spring brake actuator, and a second bolt portion (32) that is configured to extend outside of the spring brake actuator (2), said first bolt portion (31) comprising a threaded portion (34), and the second bolt portion (32) comprising an operating section for operating the brake release bolt (30) when mounted to the spring brake actuator (2), and a running nut (12) engaging the threaded portion (34), said running nut (12) being configured to axially travel along the threaded portion (34) in order to move a spring brake piston assembly (8) against the actuator power spring (6). It is proposed that the operating section is a tool interface (14) that is integrally formed on the brake release bolt (30).

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