Daimler-benz Ag

Horst Grossner

Gunter Weiger

Manfred H Burckhardt

Paul Schwerdt

Hans-Jorg Florus

Richard Zimmer

Franz Brugger

Ingo Dudeck

Hellmut Krohn

Gunter Schwegler

Manfred Maass

Detlef Kaminski

Walter Kostelezky

Jurgen Wehnert

Hans Liebold

Siegfried Schlosser

A pressure operated control installation, especially for automotive vehicles, which includes a pressure source and a servo member controlled through a control block. The control block includes a logistor, a control element coupled with a control unit, and a bypass line with a throttling arrangement. The pressure conducting inlet of the logistor is connected through the bypass line to a control inlet of the logistor and the control unit controls a connection between the control inlet of the logistor and a return line. At least two control blocks are provided with a control outlet of the logistor of the first control block and a pressure conducting inlet of the logistor of the second control block being connected to the servo member.

Pressure operated control installation

A system for controlling the propulsion on motor vehicles which not only enables the output torque of the drive unit of the vehicle to be utilized in an optimum manner in critical driving situations, especially under extreme road conditions, but also endows the vehicle with good stability and enhanced driving safety. A comparator is provided, in a propulsion control system which is triggered by at least one presettable or permanently preset threshold value of the speed of the vehicle, and generating an output signal causing the drive torque to be reduced, as soon as this threshold value is exceeded and a signal is present, which indicates that an individual wheel brake is being activated and/or that one of the driven wheels is tending to spin. The threshold value of the speed of the vehicle, which value governs the control process, is preferably regulated in accordance with the transverse acceleration which acts on the vehicle whenever it follows a curved path.

System for controlling the propulsion on motor vehicles

An ingnition distributor for an internal combustion engine, more particularly, for a motor vehicle internal combustion engine having an electronic ignition system driven by a distributor shaft which, in turn, is driven by the engine and having a device for changing a phase relationship between the distributor shaft and a distributor rotor. A control disk is rotatably mounted on the distributor shaft and is rigidly coupled with the distributor rotor. The rotation of the distributor shaft is capable of being transmitted to the control disk by means of at least one spring. An electromagnet is provided between the two poles of which the control disk is rotated, with the electromagnet forming with the control disk an anti-current brake. An electronic phase control is provided for regulating an excitation current of the electromagnet in accordance with a difference between the actual and set value of the phase displacement in dependence upon operating parameters of the internal combustion engine.

Ignition distributor for internal combustion engines

A frequency generator module has a first generator circuit and a second generator circuit, the frequencies of these circuits being variable by a physical parameter, especially a distance or angular value, with two coils arranged coaxially at a mutual spacing on linear or curved, tubular coil holders, the inductance of these coils being variable by a core displaceable in the coil holder. The combined generator module is connected by a control circuit to a changeover switch which alternately switches the output of one of the two coils to the input of the frequency generator module. A short-circuit ring is arranged in an axially normal plane between the two coils, for the duration of a specific number of pulses of the generator circuit formed from the coil and the generator module. A control and/or regulating device is provided which calculates from certain pulses of successive pulse sequences of the two generator circuits the frequencies (f1; f2) and their difference (f1-f2) and/or a correcting value which is the difference between the actual value and the desired value of the sum total (f1+f2) of the frequencies of the two generator circuits. The corrected frequency difference and/or the value of the physical variable derived therefrom is indicated, or a signal proportional thereto is transmitted.

Frequency generator

An apparatus for detecting undesirable combustion characteristics in spark-ignited internal combustion engines. A sensor and a band-pass filter tuned to the frequency of the knock vibration are provided with an output of the band-pass filter being compared with a reference value. The result of the comparison is correlated with undesirable combustion characteristics to be recognized. A rectifier is provided for solid-borne sound signals received by the sensor with the signals passing through the band-pass filter. The signal is rectified in the rectifier to a knock signal and a series circuit made up of a band-stop filter tuned to the frequency of the knock vibration, an rms rectifier, and an amplifier is provided by means of which the sound signal received by the sensor is converted into a reference signal. A comparator is provided when the reference signal and the knock signal are compared with each other and an output signal appears if the knock signal exceeds the reference signal.

Undesirable combustion characteristic detection apparatus

A method and apparatus for controlling the brake force at the wheels of a trailer provided with a tow-bar in the sense of an elimination of the force occurring between the towing vehicle and the trailer, in which the static characteristic magnitude and at least one of the dynamic characteristic magnitudes are combined to form the control magnitude for the brake force of the trailer brake.

Process and apparatus for controlling the brake force on the wheels of

An installation for the automatic shifting of change-speed transmissions, especially for motor vehicles, in which actuating devices are provided for the engagement and disengagement of the speeds, which are controllable by way of control means by at least two influencing magnitudes, particularly output rotational speed and torque; an electronic control unit having a programmed, constant-value memory device is provided, in which is stored at least one set of output rotational speed limit values coordinated to the individual speeds and torque steps, while at least the influencing magnitudes of torque and engaged speed are adapted to be applied to the electronic control unit by way of corresponding inputs; and output of the constant value memory device is operatively connected with a rotational speed comparison unit, in which the output rotational speed limit values given out by the constant-value memory device are adapted to be compared with the prevailing output rotational speed, whereby in this rotational speed comparison unit shifting-up or shifting-down signals are adapted to be released, when exceeding or falling below the limit values; these shifting-up or shifting-down signals are then applied to the actuating devices.

Installation for automatic shifting of change-speed gears

A brake force control system for vehicles, especially for motor vehicles in which one or several electrical signals dependent on the wheel acceleration are compared with predetermined threshold values and in which the resultant electrical signals are utilized for the control of actuating elements such as solenoid valves in the brake circuit, whereby the electrical acceleration signals are weighted in a manner known as such and this weighting is adapted to be influenced or even discontinued when exceeding the threshold value and/or in dependence on the polarity of the acceleration signal.

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Berglen, Germany

Horst Grossner