Abstract: An air-conditioning system with an air-conditioning compressor, an electric motor and a refrigerant circuit, in particular for motor vehicles, the electric motor being controllable by an electronic control device and an expansion member arranged in the refrigerant circuit, a further expansion member is arranged between the high-pressure side of the expansion member and the suction side of the air-conditioning compressor in the refrigerant circuit, and the electronic control device is connected thermally conductively to the low-pressure side of the further expansion member. The further expansion member is controllable as a function of the temperature of the electronic control device.

Abstract: An air-conditioning system with an air-conditioning compressor, an electric motor and a refrigerant circuit, in particular for motor vehicles, the electric motor being controllable by an electronic control device and an expansion member arranged in the refrigerant circuit, a further expansion member is arranged between the high-pressure side of the expansion member and the suction side of the air-conditioning compressor in the refrigerant circuit, and the electronic control device is connected thermally conductively to the low-pressure side of the further expansion member. The further expansion member is controllable as a function of the temperature of the electronic control device.

Abstract: A hydraulic system for a motor vehicle having a convertible top (2) which can be folded back has a convertible-top control system (1) and further hydraulic control devices (3, 4) which can be activated by a common hydraulic pump (6). In hydraulic lines (8, 9) leading to the convertible-top control system (1) there are arranged hydraulic valves (13, 14) which enable optional operation of the convertible-top control system (1) or of the further control devices (3, 4). Because of this, the hydraulic system turns out to be particularly simple structurally.

Abstract: An operating mechanism for a folding top (1) of a convertible has an electric motor (10) with a rotational speed that can be regulated for driving a hydraulic gear mechanism (11). A control unit (7) for actuating the electric motor (10) has a memory (18) for rotational speeds intended according to the positions of the folding top (1). As a result, the rotational speeds are stored as software that is easy to change.