Patent application number | Description | Published |
20080296084 | Vehicle Steering System and Method For Controlling a Vehicle Steering System - Disclosed is a vehicle steering system for motor vehicles with a steering handle operable by the driver and connected to steerable vehicle wheels in terms of effect in order to determine a direction of driving. The vehicle steering system includes a hydraulic working cylinder having two directions of effect, as well as a hydraulic pressure source, which applies hydraulic pressure to a valve assembly. The valve assembly controls the magnitude of the hydraulic pressure conveyed to the working cylinder and determines the direction of effect of the working cylinder. The valve assembly includes a slide valve, which is actuated by an actuator and associated with which are a pressure sensor and a travel sensor, whose signal outlets are connected to a pressure controller or a travel controller in terms of signals. The output quantity of the pressure controller and the travel controller can be sent to an evaluating circuit, which links the output quantities to weighting factors in order to determine a controlled quantity of the actuator. | 12-04-2008 |
20080308341 | Vehicle Steering System and Method for Controlling a Vehicle Steering System - The invention discloses a vehicle steering system for motor vehicles with a steering handle operable by the driver and connected to steerable vehicle wheels in terms of effect in order to determine a direction of driving. The vehicle steering system comprises a hydraulic steering cylinder having two directions of effect, as well as a hydraulic pressure source, which applies hydraulic pressure to a steering valve. The steering valve controls the magnitude of the hydraulic pressure conveyed to the steering cylinder and determines the direction of effect of the steering cylinder. The steering valve is an electromotively driven slide valve. The steering valve comprises a rotation-translation gear in order to displace a control slide of the steering valve in a translational way. | 12-18-2008 |
20100057291 | System and Method for Adjustment of a Steer Angle of a Wheel of a Motor Vehicle - A system for adjusting a wheel lock angle of a wheel of a motor vehicle, in particular of a rear wheel, wherein at least one wheel guide member, by means of which a wheel carrier of the wheel is connected to a vehicle body, wherein the wheel carrier can pivot about a rotational axis which runs substantially parallel to the plane of the wheel and the wheel guide member is coupled to the wheel carrier at a distance from the rotational axis, and wherein the length of the wheel guide member can be adjusted by an actuator, wherein at least one actuator is driven by a motor and at least one control unit, and the control unit includes a computer unit with a memory and a communication interface, and the control unit transmits and receives data via the communication interface by means of at least one communication bus. | 03-04-2010 |
20100242469 | BRAKE ACTUATING UNIT - A brake actuating unit for motor vehicles includes a brake master cylinder, a booster stage which is connected in front of the brake master cylinder, and a drive unit for driving the booster stage. In order to make comfortable braking operations possible, there is provision for the transmission both of the actuating force and of the boosting force to the primary piston of the brake master cylinder to take place by a force transmission module which has at least one elastic element and is arranged in the primary piston. | 09-30-2010 |
20100257971 | STEERING DEVICE FOR ADJUSTING A WHEEL STEERING ANGLE - A steering device for adjusting a wheel steering angle of a wheel of a motor vehicle is disclosed, which steering device has just one central wheel guide member for changing the wheel steering angle of the wheel and not a plurality of wheel guide members. The length of the wheel guide member can be adjusted, wherein a change in length of the central wheel guide member brings about a change in the wheel steering angle of the wheel. | 10-14-2010 |
20110272204 | Hydraulic Power-Assisted Steering and Method for Determining Steering Wheel Torque - In a hydraulic power steering system with a steering gear and a hydraulic actuator for supporting a steering wheel actuation by the driver of a vehicle including a device for actively applying an additional steering torque, is disclosed. The device for actively applying an additional steering torque includes at least one additional torque actuator and a detector for detecting the steering torque, and the detector detects a hydraulic pressure. | 11-10-2011 |
20110284313 | STEERING DEVICE, IN PARTICULAR FOR A REAR WHEEL STEERING SYSTEM - A steering device for adjusting a wheel turning angle of a wheel of a motor vehicle, in particular of a rear wheel, includes a wheel guide member via which a wheel carrier of the wheel is connected to a vehicle body, the wheel carrier being swivellable about an axis of rotation disposed parallel to the wheel plane and the wheel guide member being articulated to the wheel carrier at a distance from the axis of rotation and being adjustable in length by an electromechanical drive unit, the electromechanical drive unit being connected, on the one hand, via a push rod to a joint at the wheel carrier end in order to form a swivel bearing to establish a connection to the wheel carrier, and, on the other hand, to a joint at the vehicle body end to form a further swivel bearing to establish a connection to the vehicle body. | 11-24-2011 |
20120043806 | Slip-Controlled Hydraulic Vehicle Brake System - A hydraulic vehicle brake system and method of operating same. The system includes an electrohydraulic wheel brake pressure modulation unit, a master brake cylinder ( | 02-23-2012 |
20120169112 | BRAKING SYSTEM FOR MOTOR VEHICLES AND METHOD FOR OPERATING THE SAME - A brake system for motor vehicles, which brake system can be actuated both by the vehicle driver and also independently of the vehicle driver in a “brake by wire” operating mode, is preferentially operated in the “brake by wire” operating mode, and can be operated in at least one fall-back operating mode in which only operation by the vehicle driver is possible. The brake system has inter alia an electrohydraulic pressure generating device ( | 07-05-2012 |
20130218407 | Method for Monitoring a Brake System and Brake System - A method for monitoring a brake system for motor vehicles. The system can be actuated both by a vehicle driver and independently of the vehicle driver in what is known as a brake-by-wire mode. The hydraulic actuation device can be actuated by means of a brake pedal and has a main brake cylinder to which wheel brakes are connected, at least two brake circuits, a simulation device, which comprises at least one elastic element and gives the vehicle driver a comfortable pedal feeling, an electrically controllable pressure-providing device, which is formed by a cylinder/piston assembly, the piston of which can be actuated by an electromagnetic actuator, wherein the first measurement variable (P | 08-22-2013 |
20140203626 | Brake System for Motor Vehicles and Method for Operating a Brake System - A brake system includes a hydraulic actuating unit, which can be actuated by way of a brake pedal, a travel simulator interacting with the hydraulic actuating unit, a pressure medium reservoir under atmospheric pressure assigned to the hydraulic actuating unit, a first electrically controllable pressure supply device, a second electrically controllable pressure supply device, an electronic control unit and an electronically controllable pressure modulation device for setting wheel-specific brake pressures. The brake system preferably operates in a “brake-by-wire” mode but can also operate in a fallback mode. The second electrically controllable pressure supply device can provide boost volume during braking in a fallback mode. | 07-24-2014 |
20140368027 | METHOD FOR OPERATING A BRAKE SYSTEM FOR MOTOR VEHICLES, AND BRAKE SYSTEM - A system and method for operating a brake system for motor vehicles, includes a master brake cylinder actuated by a brake pedal and separably connected to at least one hydraulically acutuatable wheel brake by at least one brake circuit, a hydraulically operable pedal travel simulator is connectable to the master brake cylinder, an electrically controllable pressure provision apparatus is separably connected to the brake circuit, and an electronic open-loop and closed-loop control unit. Upon brake pedal actuation, a pressure of the pressure provision apparatus is applied to the brake circuit in a first operating mode and the pressure of the master brake cylinder is applied to the brake circuit in a second operating mode. In the event of transition from the second operating mode to the first operating mode while the brake pedal is actuated, the actuation travel of the brake pedal is adjusted by electronic open-loop or closed-loop control. | 12-18-2014 |
20150061854 | METHOD FOR PROVIDING HAPTIC INFORMATION TO THE DRIVER OF A MOTOR VEHICLE - The invention relates to a method for providing haptic information to the driver of a motor vehicle, equipped with a brake-by-wire brake system, about the operating state of the brake system, in which method the brake pedal characteristic is generated by a pedal travel simulator, in the form of a functional relationship between the brake pedal opposing force and the brake pedal travel, and is modified as a function of an operating state. In order to provide the driver with the haptic information channel via which electronically controlled information can be communicated to the driver during braking, without the impression of a defect arising, the invention proposes that a basic brake pedal characteristic is generated by a passive simulator spring which assigns pedal travel, on which pedal return travel transporting the haptic information is superimposed, to a given pedal force in an unchanging, constant relationship. | 03-05-2015 |