Wabco Gmbh

Zf Cv Systems Europe Bv

Zf Cv Systems Global Gmbh

Zf Friedrichshafen Ag

Zf Cv Systems Hannover Gmbh

Agco International Gmbh

Mirko Brütt

Michael Haverkamp

Jan Spremberg

Lars Volker

Frank Zielke

Volker Heinrich

Dennis Sabelhaus

Ivo Laskawy

Johannes Bührke

Lars Thielke

Ludger Frerichs

Steffen Hanke

Jakob Friedrich Schmidt

Stefan Prestel

Sebastian Kemper

Waldemar Kamischke

Georg Frank

Sebastian Bechthold

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 method of brake control of a vehicle combination () composed of a tractor vehicle () with an electronically controlled braking system () and a trailer vehicle () with a pneumatically controlled pneumatic braking system (), involves introducing the brake control pressure (p) of the trailer vehicle () into a tractor brake control line () extending to a tractor vehicle-side 'brake' coupling head () via an electronically controlled trailer control valve () of the tractor vehicle (). At the beginning of a braking operation, a pressure pulse () exceeding a target brake control pressure (p) is introduced into the tractor brake control line (). The volume of a trailer brake control line () coupled to the “brake” coupling head () is ascertained, and the absolute value (Δp) and/or the duration (Δt) of the pressure pulse () introduced are/is established depending on the ascertained volume.

Method for the brake control of a vehicle combination

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

A valve arrangement () of a tractor vehicle () for controlling a pneumatic brake system of a trailer vehicle () includes a trailer control valve () with a reservoir pressure input (p) for the introduction of reservoir compressed air and a reservoir pressure output (p) for the controlled discharge of reservoir compressed air. The reservoir pressure output is pneumatically connected to a 'reservoir' coupling head () of the tractor vehicle. A shut-off and ventilation valve () is arranged in a reservoir pressure line () upstream of the “reservoir” coupling head. Before connecting an associated coupling head of the trailer vehicle () to the “reservoir” coupling head of the tractor vehicle, the feed of reservoir compressed air to the “reservoir” coupling head can be shut off to ventilate the “reservoir” coupling head. After reconnecting the associated coupling head, the “reservoir” coupling head can be charged again.

Valve arrangement of a towing vehicle for controlling a pneumatic brake system of a trailer vehicle and a method for controlling it

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 device and a method for decelerating a vehicle having a front-loading device has a brake system and sensors for measuring the mass and the center of gravity of a load. An electronic evaluation and control unit evaluates the sensor data to determine a maximum brake deceleration in forward travel, in order to prevent the vehicle tilting about the front axle. At least one sensor of the brake system generates a sensor signal in an emergency braking situation for triggering an emergency braking operation, in which the delimitation or reduction of the effective brake pressure in the wheel brake cylinders of the front axle is canceled and, with the exception of an ABS control operation, the full brake pressure is introduced in a controlled manner by way of a primary brake valve into the wheel brake cylinders of the front axle.

Device and method for decelerating a vehicle having a front-loading device

A method for brake control of a vehicle combination () having a tractor vehicle () and a trailer vehicle () with an electrically controllable trailer control valve () changes an assigned trailer control valve characteristic curve (p_normal) stored in an electronic controller () for normal operation of the vehicle combination () or replaces it with a trailer control valve characteristic curve for special operation (p_special) in the event that a special operation of the vehicle combination () is detected or predicted, which special operation, under consideration of relevant parameters, differs from the normal operation or is evaluated as being potentially impermissible.

Method for brake control of a vehicle combination, and vehicle combination for use therewith

The present disclosure relates to a measuring device () for measuring forces and/or torques between a motorized vehicle () and a trailer or attachment which is towed or pushed thereby, wherein the measuring device () has at least three sensor elements () which are arranged on a carrier (), transversely with respect to a virtual longitudinal axis of the motorized vehicle () and spaced apart from one another, wherein the measuring device () is arranged in a coupling region between the motorized vehicle () and the pulled or pushed trailer or attachment, and wherein, in order to transmit their measured values, the sensor elements () are connected to an evaluation device (), which is configured to convert these measured values into signals for force displays and/or torque displays according to magnitude and direction.

Force or torque measuring device for a motorized vehicle with an attachment

A measuring device () is configured for measuring forces or torques between a motorized vehicle () and a trailer or attachment which is towed or pushed thereby. The measuring device () has at least three sensor elements () arranged on a carrier (), transversely with respect to a virtual longitudinal axis of the motorized vehicle () and spaced apart from one another. The measuring device () is arranged in a coupling region between the motorized vehicle () and the pulled or pushed trailer or attachment. In order to transmit their measured values, the sensor elements () are connected to an evaluation device (), which is configured to convert these measured values into signals for force displays and/or torque displays according to magnitude and direction.

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 ().

Growing community of inventors

Ronnenberg, Germany

Mirko Brütt