Mercedes-benz Aktiengesellschaft

Daimler Chrysler Ag

Daimler-benz Ag

Harry Troster

Erich Beck

Reinhard Resch

Gerhard Kurz

Rainer Freitag

Armin Muller

Martina Richerzhagen

Reinhold Schob

Matthias Hartl

Thomas Rohrig-Gericke

In a method for braking a motor vehicle at low speeds in order to avoid a collision with an obstacle in its immediate vicinity, the distance and the relative speed between the vehicle and the obstacle are determined by sensor and are based on the calculation of a necessary braking pressure or a deceleration. The brake pressure is generated at least partially independently of the driver. In order to minimize the reaction time in the case of slow approach to an obstacle in the case where the relative speed falls below a threshold value and the distance falls below a proximity limit, the braking torque is set to a smaller value than the engine torque. In the case where the distance falls below a stop limit, which is smaller than the proximity limit, the braking torque and the engine torque are adjusted in such a way that the braking torque exceeds the engine torque.

Method and appliance for braking a motor vehicle in the immediate vicinity of an obstacle

A plate-shaped holder for holding a first component on a supporting part, including a base plate, devices arranged on the base plate for fastening the holder on the first component, and devices arranged on the base plate for mounting the holder on the supporting part. The devices for fastening the holder on the first component contain a fastening bolt guide which projects from a first side of the base plate. A fastening bolt is fitted through the fastening bolt guide from the other, second base plate side, as a single fastening element between the holder and the first component. The free front end of the fastening bolt guide forms a first support point for the first component. Several supporting pins project from the first base plate side which form, by means of their free front ends, additional support points for the first component and of which two form a tilt-stabilizing triangle together with the first support point.

Plate-shaped holder

A brake system is provided in which, in the normal operation, the brake pressure in the wheel brake cylinders is generated in a power-assisted manner and the master brake lines are closed by change-over valves. During a functional disturbance, the brake pressure in the wheel brake cylinders is built up by way of a master brake cylinder, such that, when the brake pressure control device operates normally also when the switching valves are closed the brake pedal can carry out a pedal travel and, on the other hand, when there are functional disturbances of the brake pressure control device, at most with a slight idling path of the brake pedal, by the operation of the brake pedal in the master brake cylinder and the wheel brake cylinders, a brake pressure can be generated in a conventional manner.

Brake linkage and master brake cylinder

In a drive-slip control device (ASR) and anti-lock system (ABS) in a road vehicle with a hydraulic multi-circuit brake system, the return-flow pump assigned to the brake circuit of the driven vehicle wheels is used as an auxiliary pressure source for the ASR. The discharge of a pressure accumulator connected to the return line of the brake circuit of the driven vehicle wheels, after the conclusion of a drive-slip control phase, is achieved when the return-flow pump continues to be maintained in the conveying mode for a delay time commencing with the disappearance of the situation requiring control. The ASR control valve provided for shutting off the brake unit from the main brake line of the brake circuit of the driven vehicle wheels is maintained in its closing position assigned to the ASR mode. A pressure relief valve is connected in parallel with the ASR control valve. For the variable presetting of the delay time, a buffer accumulator is equipped with a pressure monitor. The output signal characteristic of the relieved buffer accumulator is used for limiting the delay time.

Road vehicle drive-slip control device and anti-lock system

In the case of an apparatus for the fixing of the hydraulic unit of an ABS and/or an ASR in the motor space of a street vehicle, the hydraulic unit is axially supported between one forward and two rearward rubber buffers which are arranged on a console which, in turn, is fixed on the vehicle body. In order to achieve, during an impact of the vehicle on an obstacle, a detaching of the anchoring of the hydraulic unit from the console or the body of the vehicle, at least one holding element of the forward rubber buffer is implemented with a defined low holding force which, starting from a minimum deceleration of the vehicle, results in a deflection of the holding element and thus in a release of the hydraulic unit. This holding element may be constructed to be pivotable or bendable. In a special development, a rivet which, in the case of a crash, acts as a desired breaking point, is provided for the fixing of the console on the vehicle body.

Apparatus for fixing the hydraulic unit of an ABS and/or an ASR in the

In an anti-blocking system for a road vehicle with statically pressure-actuatable brake circuits, a pressure modulator with an outlet pressure connected with the wheel brake cylinder is coordinated to each wheel brake, whereby pressure reduction-, pressure build-up and pressure-maintaining-phases of the anti-blocking regulation are attainable by its controllable volume change respectively maintaining constant of its volume. The pressure modulators are constructed as stepped cylinders with bore steps of different diameters passing over one into the other, in which a smaller and a larger control pressure space is movably delimited by piston steps of corresponding different diameters of a stepped piston, as well as the outlet pressure space, which is formed by an annular space remaining between the piston steps. The larger control pressure space is permanently connected with the main brake line of the respective brake circuit. One pressure inlet control valve each is connected between the outlet pressure space of the respective pressure modulator and the main brake line, whose base position is the passage position, and which, for the purpose of the anti-blocking regulation is adapted to be activated into the closing position. A function-control valve is further provided for each wheel brake, by way of which an auxiliary pressure source, also valve-controlled, is adapted to be connected to the smaller control pressure space. The output pressure P.sub.A is higher by a minimum amount, for example, 10 to 30 bar than the maximum output pressure P.sub.B of the brake pressure control apparatus multiplied with the ratio F.sub.1 /F.sub.2 of the areas F.sub.1 and F.sub.2 of the larger piston step and of the smaller piston step.

Growing community of inventors

Tamm, Germany

Harry Troster