Wabco Gmbh

Zf Cv Systems Global Gmbh

Zf Cv Systems Europe Bv

Faurecia Autositze Gmbh & Co. Kg

Faurecia Autositze Gmbh

Wabco Europe Bvba

Zf Cv Systems Hannover Gmbh

Zf Friedrichshafen Ag

Michael Haverkamp

Mirko Brütt

Lars Volker

Thomas Stellmacher

Jan Spremberg

Dennis Sabelhaus

Andreas Rutsch

Johann Lucas

Marek Repela

Martin Sagmeister

Waldemar Kamischke

Reinhard Gocz

Mirko Bruett

Julien Meghira

Tobias Gomann

Agnieszka Leszczuk

Krzysztof Harla

Sebastian Bechthold

Mirko BRÜTT

Tobias GÖMANN

A method is disclosed for controlling a change in the direction of travel of a working vehicle between forward travel and rearward travel or vice versa. The working vehicle has an electronically controllable hydrostatic travel drive, a power-operated brake system with at least one electronically controllable brake circuit, and an electronic brake-control unit for controlling the travel drive and the brake circuit. While the vehicle is traveling in a first direction, a change in the direction of travel is triggered by a switchover of the hydrostatic travel drive by means of an assigned manual operating element. To reduce the mechanical loading, the deceleration of the working vehicle can be assisted by automatically actuating the brakes of the electronically controllable brake circuit, where these brakes are actuated by being triggered by the switchover of the operating element and are released by the time the vehicle comes to a standstill.

Method for controlling a change in the direction of travel of a working vehicle between forward travel and rearward travel or vice versa

A tire pressure control device of an off-road vehicle is configured for changing tire pressures of vehicle wheels of at least one vehicle axle. Each pneumatic tire has a pressure-controlled wheel valve which is pneumatically connected to a control pressure line and to a supply pressure line. The control pressure lines and the supply pressure lines are pneumatically connected to a compressed air supply device and controlled by an electronic control unit. The actuation of the wheel valves takes place axle by axle via control valves, and the compressed air supply of the vehicle wheels is carried out by side via supply valves.

Tire pressure control device for an off-road vehicle

The invention relates to an electronically controllable secondary brake system (), operated by pressure medium, useable as both as a parking brake system and an auxiliary brake system, with spring brake cylinders () arranged on wheel brakes of at least one vehicle axle (), with a directly or indirectly electronically controllable brake control valve (). The brake force of the spring brake cylinder () can be reduced by a feed of pressure medium and can be increased by a discharge of pressure medium, and with an electronic brake control unit () for controlling the brake control valve () dependent on the current value of a brake value signal (SBW). The brake control valve () is configured as a 3/3-way proportional valve with a pressure medium inlet, a pressure medium outlet, and a working connector, which is connected via a working line () to the spring brake cylinders.

Secondary brake system of a vehicle, and method for controlling it

A power brake system () of a vehicle () has a pressure medium source () and a pressure-medium-operated primary brake system () operable as a service brake and steering brake system. The primary brake system has at least one foot brake valve () and two wheel brake cylinders () arranged on both sides on a drive axle () and operable independently of one another. A pressure-medium-operated secondary brake system (), operable independently of the primary brake system (), has a brake control valve () and at least one brake cylinder (. The secondary brake system () is electronically controllable and has a brake control valve () configured as a solenoid valve. The braking force of the at least one brake cylinder () can be set by feeding or removing pressure medium to or from the latter via the brake control valve ().

Power brake system of a vehicle and method for controlling same

A trailer control module () of a pressure-medium operated braking system of a tow vehicle has a valve assembly for controlling a pneumatic braking system of a trailer vehicle The valve assembly includes the following: an electronically controlled trailer control valve () which contains a pneumatically controlled relay valve () with an inverted control input (); a pressure-medium controlled backup valve () which contains a pressure-medium controlled relay valve (); and at least one electronically controlled parking brake valve (), via which the relay valve () of the trailer control valve () can be actuated pneumatically at its inverted control input (). In addition, a coupling device () is present, by which the parking brakes of the tow vehicle can also be operated via the parking brake valve ().

Control module of a tow vehicle for controlling a pneumatic braking system of a trailer vehicle

A valve arrangement () of a hydraulically braked tractor vehicle for controlling the brake pressure of a pneumatically braked trailer includes an electronically controlled trailer control valve () with an inlet valve (), an outlet valve (), a pneumatical relay valve (), a breakaway valve () and a brake control pressure sensor (). The valve arrangement also has a hydraulically controlled backup valve () with a hydraulically activated relay valve (), a redundancy valve (') and a hydraulic control pressure sensor (). Output-side brake control lines () are connected via a shuttle valve () to a brake coupling head (). The valves () and the pressure sensors () of the trailer control valve (), the valves (&#x2032;) of the backup valve () and the shuttle valve () may be combined in one trailer control module () with a single housing ().

Valve arrangement for a hydraulically braked tractor vehicle with a pneumatically braked trailer vehicle

A tire pressure regulating system is disclosed for adjusting tire pressures of pneumatic tires of vehicle wheels of a plurality of vehicle axles of a motor vehicle while driving. The tire pressure regulating system comprises: at least one switchover valve, an axle valve, a wheel valve and a valve. A motor vehicle comprising the tire pressure regulating system is also disclosed.

Tire pressure control system

A power-operated hydraulic brake system for a wheeled vehicle includes a main brake line; a brake valve configured to input a target brake pressure into the main brake line, the brake vale configured to be actuated via a brake pedal; a plurality of wheel brake lines branching off from the brake valve, each of which leads to an actuating unit of a wheel brake; and a valve assembly of an ABS control system. The valve assembly includes an inlet valve arranged between the main brake line and one of the wheel brake lines, and an outlet valve arranged between the relevant wheel brake line and an unpressurized return line. The inlet valve and the outlet valve are pressure-controlled 2/2-way switching valves with correspondingly large switching cross sections, and the inlet valve and the outlet valve are each assigned at least one pilot valve designed as a solenoid switching valve.

Hydraulic brake system

A hydraulic power brake system () of a wheeled vehicle or for a vehicle unit has a main brake line (), in which a setpoint brake pressure can be controlled via a brake valve () that is operated via a brake pedal (), and from which an axle brake line or a wheel brake line () branches off. Inlet valves and outlet valves and a pilot control valve of the ABS control system for the vehicle unit or for each vehicle axle are respectively disposed together in an ABS modulator block (), which also includes a temperature sensor () for detecting the oil temperature (T) and a heating element () for locally heating the hydraulic oil are disposed in each ABS modulator block ().

Hydraulic power brake system and method for abs control

A tire pressure regulating device for adjusting, while driving, the tire pressures of vehicle wheels of a plurality of vehicle axles of a motor vehicle with pneumatic tires includes at least one switchover valve arranged on the vehicle chassis that can be controlled in an electromagnetic/pneumatic manner, a plurality of axle valves, each axle valve being arranged on the vehicle chassis for each vehicle axle and being controllable in an electromagnetic/pneumatic manner, a plurality of pressure-controlled wheel valves, each pressure-controlled wheel valve being arranged at a respective vehicle wheel, a pilot control valve arranged on the vehicle chassis and being controllable in a purely electromagnetic manner or in an electromagnetic/pneumatic manner, and a plurality of two-channel rotary couplings arranged between the vehicle axles and associated vehicle wheels and provided with switchable seals.

Tyre pressure regulating device

A leveling valve for discharging and supplying air from and to a plurality of utilization elements comprises a valve disc arrangement configured to direct air between a source of pressurized air, an exhaust port, and the utilization elements. The valve disc arrangement comprises a first and a second valve disc, which are rotatable with respect to each other such that the valve is switchable between multiple switching positions, and, in some switching positions, either the source of pressurized air or the exhaust port are in fluid communication with the utilization elements. The valve discs provide a stepped increase in flow cross-section in a respective flow path to or from the utilization elements. The stepped increase is dependent on the angle of rotation between the valve discs.

Leveling valve for discharging and supplying fluid

A vehicle air suspension system includes at least two spring bellows assigned to pneumatic springs on opposite vehicle sides of a vehicle axle. The springs can be connected via connection lines, each of which is provided with a level-regulating valve, to a main pressure line and can be shut off with respect thereto. The main pressure line can be connected via a main pressure valve alternately to a compressed air source and to a compressed air sink. The connection lines of the spring bellows are connected to each other via a connection line provided with a throttle and can be shut off by a shut-off valve. A mechanically activatable shut-off valve is coupled to one of the level-regulating valves arranged on the offside of the vehicle such that the shut-off valve is open when the level-regulating valve is closed and is closed when the level-regulating valve is open.

Air suspension system of a motor vehicle

A suspension system includes spring bellows that are associated with pneumatic springs of vehicle axles, are connectable by lines having level control valves to a main pressure line, and can be shut off with respect thereto. The main line is connectable by valves alternately to a compressed air source and a sink, and can be shut of with respect thereto. To set different air mass flow rates when air is supplied to/removed from the bellows, the bellows of the springs at least on a vehicle axle or side can be connected to the main line in parallel with the connecting lines, at least by further connecting lines having further level control valves, and can be shut off with respect thereto. The further valves have nozzle cross-sectional surfaces the same size as the other level control valves. Chokes are downstream of the further valves in the ventilation direction, the cross-sectional surfaces thereof being smaller than the nozzle cross-sectional surfaces of the further valves.

Pneumatic suspension system of a motor vehicle and method

The invention relates to an energy absorption device in particular for the seat of an automobile in case of a shock, said device being substantially in the form of a plate including a succession of cutouts following each other in a deformation direction (X) between a first cutout and a last cutout and defining between them at least one bridge extending in a stretching direction (Y) transverse to the deformation direction (X), the first cutout having a shape slightly flaring in the deformation (X) direction towards the following cutouts.

Energy absorption device for automobile seat, and assembly and set including said device

Vehicle seat includes seat frame, an articulated backrest frame lockable by an angle adjuster adjustable between an upright basic position, a partially forwardly-folded easy-entry position, and a completely forwardly folded cargo position. A release shaft is pivotable by a release lever to release the angle adjuster. The backrest frame can only be moved out of the basic position into the cargo position by being folded forward into the easy-entry position, locked by resetting the release lever, then unlocked by actuating the release lever and folded forward into cargo position. An easy-entry mechanism includes the following: control cams on the backrest frame with an easy-entry stop, a locking hook articulated to the seat frame to engage the easy-entry stop, and a pushrod eccentrically articulated to the release shaft that, when the backrest is folded forward, is initially in an inactive position, and then releases the locking hook in an active position.

Growing community of inventors

Hannover, Germany

Michael Haverkamp