摘要:
The invention concerns an immobilization device for vehicles having a control apparatus (10, 12, 15) which is isolated only when an authorization check has been carried out. A preliminary release arrangement (19) unconditionally releases the control apparatus (10, 12, 15) on starting for a preliminary release time (Tvor). According to the invention, the preliminary release arrangement (19) restricts the number of possible successive starts with unconditional release to a value which is predetermined in each case. This value is smaller than the value last set if the preceding start was irregular.
摘要:
The proposal is for a motor vehicle security arrangement with a theft-protection control device which effects an exchange of data with at least one functional control device, especially an engine control device in order to control its operational readiness, in which the data exchange takes place via a data line interconnecting at least the theft protection control device and the functional control device. To the data line (1) may be optionally connected an external device (4) designed for the exchange of data with at least one of the control devices (2, 3, 3', 3''). The data line is a line already present in the motor vehicle, especially a K and/or L diagnosis line to ISO standard 9141. For data exchange purposes, one of the control devices (2, 3) connected via the data line (1) perceives the functions of the control unit. If an external device (4) is connected to the data line (1, 1'), it assumes the function of control unit from the control device (2, 3) monitoring the data exchange in order to operate the data exchange with the control devices (2, 3, 3', 3'') connected via the data line (1).
摘要:
The invention concerns an immobilization device for vehicles having a control apparatus (10, 12, 15) which is isolated only when an authorization check has been carried out. A preliminary release arrangement (19) unconditionally releases the control apparatus (10, 12, 15) on starting for a preliminary release time (Tvor). According to the invention, the preliminary release arrangement (19) restricts the number of possible successive starts with unconditional release to a value which is predetermined in each case. This value is smaller than the value last set if the preceding start was irregular.
摘要:
Described is a system for controlling a fuel-metering device, in particular for a diesel engine. First means generate a first signal for the control of a first controlling device (115) which determines the start and end of fuel feed. Second means generate a second signal for the control of a second controlling device (125) which determines the feed rate, the second means take into account a signal characteristic of the start of fuel feed.
摘要:
The processing circuit proposed for a differential throttle travel control device comprises the following components: a) a first output terminal (A1); b) a first oscillator (OSZ1) which produces at the first output terminal (A1) a first alternating voltage which has a constant frequency and its amplitude can be adjusted by means of first amplitude adjustment means; c) a second output terminal (A2); d) a second oscillator (OSZ2) which produces at the second output terminal (A2) a second alternating voltage which has the same frequency as the first alternating voltage, its phase is displaced by 180° with respect to that of the first alternating voltage and it can be adjusted by means of second amplitude adjustment means; e) an input terminal (E) for feeding in an input signal; f) a phase-controlled rectifier (PG), which is connected to the input terminal, for rectifying the alternating-voltage component of the input signal; g) a comparator (AG) which is connected to the rectifier, receives the rectifier output signal as a reference signal and compares this signal with a measured signal to produce a deviation signal and; h) an integrator (I) which is connected to the comparator in order to integrate the deviation signal and which supplies the integrated signal as an amplitude adjustment signal to the amplitude adjustment means of both oscillators so that the amplitude of the voltage at one ouput terminal increases by exactly the amount that the amplitude of the voltage at the other ouput terminal decreases, the sum of the amplitudes thus remaining constant. This processing circuit makes it possible to connect up a differential throttle travel control device directly, without the need for a resistance network or d.c. source. A measurement signal without ripple is obtained which changes in proportion to the distance travelled by the control rod (VS) of the control unit (DDWG), the characteristic not being falsified with respect to earth on account of parasitic capacitances.
摘要:
A circuit (MS) for measuring the value of an impedance in an impedance network connected to the measurement circuit has first oscillator means (OSZ1), second oscillator means (OSZ2), a phase-controlled rectifier (PG), comparator means (AG) between a desired value and a real value and an integrator (I). The first oscillator means apply a first alternative voltage of constant amplitude and frequency to a first output connection (A1). The second oscillator means apply a second alternative voltage of identical frequency, but variable amplitude and opposite phase, to a second output connection (A2). The amplitude of the second alternative voltage depends on the phase of the signal which is transmitted to the phase-controlled rectifier via an input connection (E). If the input signal is in phase with the second output signal, the amplitude of the second output signal is reduced. If the phase of the input signal is opposite, however, to the phase of the second output signal, the amplitude of the second output signal is increased. The amplitude is changed by means of the integrator, which integrates the rectified signal that has been rectified and compared with a desired value, and supplies the integration value as an amplitude setting value. If an impedance network is connected to this measurement circuit in an appropriate manner, the amplitude of the second output signal is set to a fixed value. From the relationship between the amplitudes of both output signals and known properties of the impedance network, the impedance value of a predetermined impedance, which is at first unknown, can be determined very precisely. The circuit is therefore particularly useful with position sensors in motor vehicles.
摘要:
Un circuit d'évaluation pour capteurs de position d'étrangleurs différentiels comprend les sous-groupes suivants: a) un premier raccordement de sortie (A1); b) un premier oscillateur (OSZ1) qui applique une première tension alternative au premier raccordement de sortie (A1), cette première tension alternative ayant une fréquence constante et une amplitude réglable par un premier régulateur de l'amplitude; c) un deuxième raccordement de sortie (A2); d) un deuxième oscillateur (OSZ2) qui applique une deuxième tension alternative au deuxième raccordement de sortie (A2), cette deuxième tension alternative ayant la même fréquence que la première tension alternative et une amplitude réglable par un deuxième régulateur de l'amplitude, mais une phase décalée de 180° par rapport à la première tension alternative; e) un raccordement d'entrée (E) pour introduire un signal d'entrée; f) un redresseur (PG) à commande de phase relié au raccordement d'entrée afin de redresser la partie de tension alternative du signal d'entrée; g) un comparateur (AG) relié au redresseur qui reçoit le signal de sortie de ce dernier comme signal de valeur réelle et qui compare ce signal avec un signal de valeur prescrite afin de former un signal de déviation; et h) un intégrateur (I) relié au comparateur afin d'intégrer le signal de déviation et qui transmet le signal intégré en tant que signal de régulation de l'amplitude aux régulateurs de l'amplitude des deux oscillateurs, de sorte que l'amplitude de la tension dans un raccordement de sortie s'élève exactement dans la même proportion que l'amplitude de la tension dans l'autre raccordement de sortie diminue, la somme des amplitudes restant par conséquent constante. Ce circuit d'évaluation permet de raccorder directement un capteur de position d'un étrangleur différentiel sans réseau de résistances et sans source de tension continue. On obtient un signal de mesure sans ondulations qui se modifie proportionnellement au déplacement de régulation d'une tige de régulation (VS) du capteur (DDWG),
摘要:
An adjustable voltage divider produced by hybrid technology has an ohmic resistance layer crossed by a current and arranged between two printed conductors, and a second resistance layer electrically connected to the first resistance layer and to which a third printed conductor which acts as an acceptance electrode is connected. To adjust the voltage divider, a notch is made into the second resistance layer in such a way that a desired value can be sensed at the acceptance electrode. In order to sense very low divider voltages with the required accuracy while only slightly increasing the area required by the voltage divider, the second resistance layer is connected by printed conductors to the first resistance layer so that a first divider voltage sensed at the first resistance layer is applied to the second resistance layer, and the acceptance electrode connected to the second resistance layer can sense a fraction of the first divider voltage.
摘要:
A temperature-dependent control device for an internal combustion engine (100) has a controller (110) and at least one temperature sensor (140, 143, 146) arranged in the controller (130).
摘要:
A circuit arrangement for cyclic supply of an electromagnetic consumer, with a control device actuated by a control signal equal to the difference between the instantaneous signal to the consumer and a given guiding signal, comprises a cyclic current regulator whose timing pulse rate is adjustable.