Abstract: A motor vehicle roof with a closure element (14) for a roof opening (12) which can be displaced between a closed position and an open position and which is provided with a primary solar generator (24). The closure element (14) is made such that an additional element (32) which has an additional solar generator (34) can be coupled to the closure element in the open position of the closure element, such that the additional element assumes a working position on the outside of the vehicle to generate solar current.

Abstract: A circuit for power supply of a ventilation fan for cooling the interior of a motor vehicle and/or a motor vehicle battery by means of solar cells, with a manually actuated switch for switching the solar cell power supply to the ventilation fan or battery. An automatic control provides a fully automatic mode for automatic switching of the solar cell power supply depending on the temperature in the motor vehicle interior and/or the battery charging state which can be overridden by activating an actuating element of a manually activated switch in a semiautomatic mode. Furthermore, there is an optical display for indicating which of the automatic and semiautomatic mode is activated.

Abstract: An improved motor vehicle roof is provided which includes a roof opening provided in a fixed roof surface, at least one closing element for selectively at least partially closing the roof opening, an electrical adjusting drive for driving the closing element and a sensor engineering system for detecting a situation which adversely affects the safety of the passengers and for producing a corresponding danger signal. Importantly, the roof includes a quick-action closing device coupled to the sensor engineering system which causes the closing element to close from its open or partially open position when a danger signal is present. The closing device includes means for producing an electrical voltage which exceeds the normal feed voltage (rated voltage) of the adjusting drive by several times, and for applying the voltage to the electric adjusting drive.

Abstract: An arrangement for supplying power to a motor vehicle electrical system (3) by means of a motor driven vehicle generator (1) and a solar generator (2). To efficiently save fuel, for power generation the arrangement compares the output or energy balance of the solar generator (2) relative to the vehicle generator (1) and reduces the vehicle generator output in proportion to the solar current supplied when a positive energy balance exist in favor of the vehicle generator (1) and separates the vehicle generator (1) from the vehicle engine (13) when a positive energy balance exists in favor of the solar generator (2).

Abstract: Solar roof for motor vehicles with a solar generator having solar cells for supplying power to a power consumer and/or a battery and with a D.C. converter for impedance matching between the solar generator and the consumer and/or battery. The D.C. converter is a flat module and is integrated into the solar cell carrying roof panel.

Abstract: Circuit arrangement for supplying power to a fan and/or battery from solar energy generator in a motor vehicle. A DC voltage converter using impedance matching between the solar energy generator and the fan or the battery includes a switch that is alternately opened and closed by a pulse-width-modulated operating signal, and is part of the circuit arrangement. To generate the operating signal, a microprocessor, a frequency generator and a pulse width modulator, which is acted on by the output signal of the frequency generator and a control signal of the microprocessor, are provided. These components also are used as components of an actuating device to displace a movable part of a sun roof, a changeover signal switching between use for charging a battery and/or powering a fan and use operating the sun roof. Thus, the circuit arrangement is able to fulfill multiple functions.