摘要:
The present invention relates to an electric heating apparatus, particularly as an additional heater for an automotive vehicle, and to a control circuit for an electric heating apparatus that permits a substantially independent operation of the additional heater. The heating power control takes place via a temperature sensor integrated into the additional heater and limit values stored in the control circuit before.
摘要:
The present invention relates to a motor vehicle electrical system, comprising a generator, a battery, a starter and a high-capacity capacitor for storing electric energy for the starting process of a motor vehicle engine. The electrical system further comprises a voltage transformer and an interrupter which are connected in parallel between the capacitor and the battery and are controlled for preparing a starting process of the motor vehicle engine in such a way that the voltage transformer transforms the voltage of the battery into a larger voltage and the interrupter interrupts the electrical connection between the battery and the capacitor.
摘要:
A method of operating a device for monitoring vehicle-tire pressures and indicating changes in pressure by radio, which is arranged in the valve of the pneumatic tire and contains a power source; a pressure sensor; an analog/digital converter for digitizing the pressure signal obtained from the pressure sensor; a memory for storing the pressure signal; a transmitter; a comparator, in particular in a module with a microprocessor, which compares the pressure signal with a previously stored comparison pressure signal, generates a signal if the deviation of the pressure signal from the comparison pressure signal exceeds a threshold, and activates the transmitter, which thereupon transmits a datum regarding the detected deviation to a receiver arranged in the vehicle; and a timing switch which activates the device at time intervals for a measurement and comparison operation and otherwise keeps it deactivated for purpose of power conservation. The comparator stores the pressure signal and, with said pressure signal, constitutes a new comparison pressure signal which replaces the previous comparison pressure signal.
摘要:
The invention relates to an electronic battery safety switch which facilitates a reliable and reversible disconnection of the motor vehicle on-board network from the battery. For this purpose an electronic solid-state switch is used which facilitates an unlimited number of switching cycles. The solid-state switch electrically disconnects the motor vehicle on-board network and the battery with the application of a crash signal or an overcurrent signal or when the ignition is switched off. With a parked vehicle an impermissibly high idle current and a discharge of the battery can be reliably prevented in an effective and simple manner. If the current flows from the on-board network in the direction of the battery, then the solid-state switch is switched actively conducting. Thus, damage to the switch in the inverse mode can be prevented.
摘要:
In the method of controlling the wiping interval, the interval of time between two consecutive wiping movements, of which at least the second wiping movement was started arbitrarily, is measured, the measured value is stored and is subsequently used as interval time unless a different interval time becomes stored due to another arbitrary starting of wiping movements, or unless the interval operation of the wiper is interrupted or unless the control circuit is deenergized.
摘要:
A circuit (20, 50) for voltage stabilization in an onboard power supply (10), particularly for motor vehicles, which is electrically connected between the onboard power supply (10) to be stabilized and a first energy store (E1) is disclosed. The circuit (20, 50) includes a diode element (24) which contains a plurality of semiconductor switches (34) connected in parallel. The circuit (20, 50) also includes a pilot and control circuit (33). The control circuit (33) determines the level of a current flowing through the diode element (24) and controls the semiconductor switches (34) of the diode element (24) on the basis of the determined current level. The circuit (20, 50) includes a second energy store (E2) which is electrically connected to the diode element (24) and to the onboard power supply (10).
摘要:
For controlling a multi-stage load with pulsewidth modulation (PWM), the individual stages have normally separately applied thereto load currents which are clocked in a phase-shifted mode so as to avoid load peaks. An output stage for PWM control of a load stage with a delay circuit which, in addition to the load current modulated by a PWM input signal, supplies a PWM output signal that is delayed by a predetermined fraction of the period duration relative to the PWM input signal. The output stage can especially be realized by integrating the delay circuit together with the actual power semiconductor switch and an associated monitoring and control circuit in a single component. By cascading such output stages, a controller for phase-shifted PWM control of multi-stage loads, which is independent of a precise time base, can be realized in a simple manner.
摘要:
A glow plug comprises a heating rod with an inner heater coil and optionally at least one control coil, the heating rod being insulated from the glow plug body and is provided with a plug-type or screw terminal for the power supply voltage. Furthermore, the terminal (4) has an electronic component (6), preferably a chip, with a terminal (7) connected to the power supply voltage, a terminal (8) connected to the glow tube (1.3) and a terminal (9) connected to the body (3). The electronic component (6) is designed as a control element for switching the functioning of the glow plug between a heating function and a sensing function for measuring the ion flow in the combustion space area in proximity to the heating rod (1).
摘要:
The invention relates to a circuit (20, 50) for voltage stabilization in an onboard power supply (10), particularly for motor vehicles, which is electrically connected between the onboard power supply (10) to be stabilized and a first energy store (E1). The circuit (20, 50) comprises a diode element (24) which contains a plurality of semiconductor switches (34) connected in parallel, a pilot and control circuit (33) which determines the level of a current flowing through the diode element (24) and controls the semiconductor switches (34) of the diode element (24) on the basis of the determined current level, and a second energy store (E2) which is electrically connected to the diode element (24) and to the onboard power supply (10).
摘要:
The present invention relates to a motor vehicle electrical system, comprising a generator, a battery, a high-capacity capacitor and a power distributor for controllably supplying energy to individual load circuits of the motor vehicle. The generator, the battery and the high-capacity capacitor are connected in parallel. The electrical connection line between the battery and the power distributor has a cross-section of less than 10 mm2 if the line is less than 2 m long while having a cross-section of less than 40 mm2 if the line is more than 2 m long.