ZF CV Systems Europe

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).