Itt Industries, Inc.

Continental Teves, Ag and Company Ohg

Alfred Teves Gmbh

Other

Itt Manufacturing Enterprises, Inc.

Continental Ag Vahrenwalder

Hans W Bleckmann

Heinz Loreck

Helmut Fennel

Michael Zydek

Jochen Burgdorf

Juan Belart

Wolfgang Fey

Lutz Weise

Ivica Batistic

Wolfram Seibert

Hans Wupper

Michael Latarnik

Alexander Kolbe

Otto Determann

Marius Goslar

Johannes Graeber

Peter Jones

The present invention relates to a method and a control circuit for detecting and evaluating the conditions of vehicle movement dynamics for a motor vehicle by means of wheel force sensors, preferably tire sensors, which take the preadjusted air slot between at least one rotating encoder and at least one pick-up for measuring data into account as a standard for the transverse forces that act on the wheel or on the tire. In order to reduce the errors in the evaluation of wheel forces, especially of deformations of the wheel rim and/or the tire detected by means of tire sensors, the air-slot-dependent operating point of the output signal of the pick-up for measuring data or a signal-conditioning device is set irrespective of the preadjustment of the said point which was made during predetermined driving behavior.

Method for detecting and evaluating the conditions of vehicle movement dynamics for a motor vehicle

The present invention relates to an electronically controlled brake force distributor for automotive vehicles, which includes a pedal-operated braking pressure generator (,) to which wheel brakes (HL, VR, HR, HL) are connected by way of pressure fluid lines. At least one valve (,) is inserted into the pressure fluid lines and positioned in the pressure fluid conduit to the rear-wheel brakes. An actuator (,) is provided to actuate the valve (,) and, as a function of the vehicle deceleration, switches the valve (,) from a first into a second position in which the valve (,) is switched from its open initial position to a position separating the rear-wheel brake (HR; HL) hydraulically from the braking pressure generator (,). In this separating position, the rear-wheel brake (HR; HL) is hydraulically connected exclusively to an accumulator chamber (,) associated with the actuator (,).

Electronically controlled motor vehicle braking force distributor

A circuit configuration for controlling a major number of consumers (,) such as the electromagnetically operable multi-directional valves of an anti-lock control system (MWV,-MWVn) comprises a control unit (,) whose output signals can be fed to the consumers (,) via amplifier stages (,). The individual amplifier stages (,; VS,-VSn) are designed as so-called &ldquo;intelligent power drivers&rdquo; and essentially consist of a power amplifier (,) with integrated electronic controls and monitors. The control unit (,) and the amplifier stages (,; VS,-VSn) are interconnected to form a closed loop or chain. Data transfer is performed from a synchronous serial interface of the control unit (,), via the individual amplifier stages (,; VS,-VSn) and back to a serial entry of the control unit (,).

Circuit configuration for controlling electric or electromechanical consumers

Method and circuit configuration for controlling a brake system with

A control system and method for a brake system with anti-locking and/or traction slip control and sequential brake pressure modulation. A modulator pressure pattern is formed in a circuit (33) by measuring and evaluating variables determining the pressure in the control chamber of chambers (21) of a brake pressure modulator (4). The modulator pressure pattern represents, by approximation, the course of pressure in the modulator (4). This modulator pressure pattern is considered in the brake pressure control, that is in determining the excitation periods of the multi-way valves (13-16, 22, 23, 25) determining the pressure in a modulator chamber (21) of the brake pressure modulator (4) and in the wheel brakes (9-12). The pressure pattern is formed by integration of the valve excitation periods of the pressure increase and pressure decrease characteristics of the modulator (4) under consideration or of the entire system.

Process and circuit configuration for controlling a brake system with

To process the output signal of a rotational speed sensor (2) which generates an alternating voltage dependent in respect of frequency and amplitude on the rotational speed, two low-pass filters (TP1, TP2) serve to produce a useful signal (I1), on the one hand, and a reference signal (I2), on the other hand. The two signals are compared. In dependence on the difference of these signals (I1, I2) a pulse-shaped output signal, namely the processed sensor signal, is generated by means of a comparator (7). The reference signal dynamically follows the useful signal with the aid of a control signal issue by an adapter circuit (20,21).

Method and circuit configuration for processing the output signals of a

To avoid dangerous pressure decreases in antiskid systems, it is necessary to continuously monitor the operability of the electrical components. The present invention ensures maximum reliablity and a simple circuit configuration. Electrical signals are generated during the period of time in which a pressure decrease occurs and/or by the speed of pressure decrease at each wheel of a vehicle axis and are subtracted from one another. If the absolute value of the difference reaches a limiting value, the disturbed part of the system will be prevented from causing a further pressure decrease.

Method and a device for monitoring an antiskid system

A brake system with brake slip control and traction slip control provided for road vehicles comprises a braking pressure generator (1) comprising a single-type or tandem-type master cylinder (2, 9, 9'), a power brake booster (10, 10', 10') connected upstream in the pedal line and a positioning device (11) between the master cylinder and the power brake booster. Multiple-way valves (4, 5, 5', 5', 5'', 34-36, 49-51, 66-68) are provided which, in the event of brake slip control, cause dynamic fluid delivery out of a dynamic circuit, (e.g., a power brake booster (7, 10, 10', 10')) and which, for traction slip control, will interrupt the connection to the dynamic circuit and bring about direct communication with the auxiliary energy source (8, 8'). The pressure introduced for traction slip control will be delivered by way of the secondary-side or pedal-side chambers (3, 39, 40, 53, 54) within the master cylinder (2, 9, 9') into the working chambers (12, 13) and from there to the wheel brakes of the driven wheels (VR, VL).

Brake system with slip control for automotive vehicles

Converters are known where input pulses are coupled to a detector stage via an adding device and a first integrating register. The detector stage provides an output signal relative to threshold values which increases, keep constant or reduce the contents of a second integrating register. The contents of the second register are coupled to the minus input of the adding device. The time variation of the input pulses may be coupled from the detector stage. According to the present invention the dynamic behavior, stability and suppression of disturbances is improved by differentiating the input pulse train, coupling this pulse train to the detector stage and to integrate the output of the detector stage with the integration factor being constantly adjusted to the output signal of the detector stage.

Method and circuit for the conversion of variable physical quantities

It is known that a vehicle speed reference signal suitable for slip control can be obtained by fully releasing the braking force at one or more vehicle wheels intermittently and to obtain the true vehicle speed from the signal provided by the free-rotating wheels. However, this technique results in the stopping distance of the vehicle being longer than desired since the braking effectiveness is considerably reduced. To avoid this disadvantage, the present invention compares a speed reference signal cyclically with the instantaneous velocity signals of the wheels and to weight the comparison result dependent on whether the instantaneous velocity signal comes from a driven wheel or a non-driven wheel. The weighted comparison result provides a correcting factor for the speed reference signal.

Method and circuit for the generation of a speed reference signal for an

A secondary circuit identical to the primary arithmetic circuits is provided for an anti-skid electronic control system. The outputs of the secondary and primary circuits are connected in a predetermined manner to a comparator arrangement. If an error occurs in the secondary and/or primary circuits, the comparator will detect the error and render the entire anti-skid system inoperable.

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Frankfurt am Main, Germany

Hans W Bleckmann