Abstract:
Disclosed is an electronic system for a motor vehicle, comprising an electronic control device which is coupled to electronic control devices of other electronic systems of the vehicle via an electronic communication system in order to cooperate with said other electronic systems by exchanging data. Electronic sensor devices which control and/or regulate operating states of the vehicle detect parameters that are related to said operating states of the vehicle. The aim of the invention is to improve said electronic system so as to create cost-related and functional advantages. Said aim is achieved by the fact that at least one of the electronic sensor devices is received in one of the electronic control devices.
Abstract:
The wheel of a vehicle, particularly of a commercial vehicle and at low speeds, may be subjected to friction oscillations which are detected by the measuring sensor of the adjusting device. It simulates in the anti-blocking device a high speed of the wheel. To remedy such malfunction, there is provided a circuit (15, 16, 22, 23, 27, 28) which detects the impossible speed changes of the wheel. During a malfunction, this circuit (15, 16, 22, 23, 27, 28) energizes an auxiliary circuit (13, 18, 24, 30) which elaborates an auxiliary signal for the anti-blocking device derived from the last speed of the wheel before the malfunction.
Abstract:
In order to measure the rotational speed of a wheel in a vehicle brake system with anti-blocking unit, electromagnetic signals corresponding to the rotational speed, whose amplitude and frequency increase regularly with increase in rotational speed, are induced in a rotational speed sensor. If, due to sources of error, the amplitude of the induced signal does not increase with the frequency of the signal, a measured value of the rotational speed is determined by means of the measured amplitude and not by means of the measured frequency. To obviate erroneous measurement signals, it is also possible, if the signal amplitude does not increase with frequency, to derive the rotational speed from the last measured value of the frequency of the induced signal whose amplitude still increased with the frequency.
Abstract:
Process for adjusting the brake pressure according to the wheel movement behaviour, in which the wheel retardation and wheel slippage are integrated over a pre-set time, the integration results are combined and pressure reduction pulses are produced if the result of the combination exceeds a limit value.
Abstract:
An antilocking system for motor vehicles can be switched between normal two wheel drive, four wheel drive and four wheel drive with central lock, and can be provided if necessary with further differential locks for each axletree. The necessary reference for the slippage control by the antilocking system when starting the motor, difficult to generate in such cases, is obtained by using signals generated when the four wheel drive and/or locks are switched over or switched on.
Abstract:
Anti-locking adjustment system, in which pressure drops due to wheel retardations and accelerations in rapid succession cannot easily occur. This is achieved by means of a summing element (6) to which a numerical value is fed at each wheel acceleration and added therein; the sum is reduced according to a pre-set function. The sum value existing at any time provides a measurement of the extent to which the occurence of the pressure drop should be rendered more difficult, e.g. by raising the threshold.
Abstract:
The invention concerns a hydraulic braking system for an off-road vehicle, with a brake booster which can be actuated by a brake pedal (1a) and comprises a master cylinder (1) and a hydraulic fluid reservoir. The hydraulic braking system further comprises: a first braking arrangement (VR, VL) which is coupled to a first vehicle wheel and, in a first position (5.1), can be connected to the master cylinder by an electronically controlled first valve arrangement (5) or, in a second position (5.2), can be separated therefrom; a second braking arrangement (HR, HL) which is coupled to a second vehicle wheel and, in a first position (6.1), can be connected to the master cylinder by a second valve arrangement (6) or, in a second position (6.2), can be separated therefrom; a third valve arrangement (7) which is arranged downstream of the first valve arrangement and by means of which the first braking arrangement (VR), in a first position (7.1), can be separated from a pressure accumulator (13) and an inlet side (9b) of a pump (9) or, in a second position (7.2), can be connected to the pressure accumulator (13) or the pump inlet side (9b); and a third valve arrangement (8) which is arranged downstream of the second valve arrangement (6) and by means of which the second braking arrangement, in a first position (8.1), can be separated from a pressure accumulator and the pump inlet side or, in a second position, can be connected to the pressure accumulator or pump inlet side, it being possible to connect the pump outlet side (9a) to at least one of the two braking arrangements.
Abstract:
An automatic anti-skid system to reduce slippage determines the increase in reference speed required to determine the slippage from the deceleration of the vehicle, and derives this deceleration from the reference speed, whereby the increase in reference speed also depends on the deceleration of the vehicle.
Abstract:
An anti-locking regulating system whereby the pressure rise occuring after a pressure drop is produced from a time-based pressure-rise phase and subsequent pulses. According to the invention, the measured pressure-rise phase is broken down into at least two pressure-rise pulses of measured length, whereby the duration of the preceding pulse is correspondingly longer than that of the subsequent pulse. The measured pressure-rise phase is also dependent on the previous pressure drops.
Abstract:
Um ein elektronisches System für ein Kraftfahrzeug, das ein elektronisches Steuergerät umfasst, das über ein elektronisches Kommunikationssystem mit elektronischen Steuergeräten anderer elektronischer Systeme des Fahrzeugs gekoppelt ist, um durch Datenaustauschen mit den anderen elektronischen Systemen des Fahrzeugs zusammenzuwirken, wobei elektronische Sensoreinrichtungen zum Steuern und/oder Regeln von Betriebszuständen des Fahrzeugs mit den Betriebszuständen des Fahrzeugs in Beziehung stehende Grössen erfassen, dahingehend zu verbessern, dass Kosten- und Funktionsvorteile erzielt werden, wird vorgeschlagen, dass wenigstens eine der elektronischen Sensoreinrichtungen in einem der elektronischen Steuergeräte aufgenommen ist.