Control arrangement for an auxiliary heater in motor vehicles

DETAILED DESCRIPTION OF THE DRAWING The figure is a schematic block diagram of a control arrangement for an auxiliary heater according to the invention.
As illustrated in the drawing, the control arrangement consists of a portable transmitter 1, of a receiver 2 of a control apparatus 3, of a clock 8 with a time generator 8.
1 and a time display 8.
2 installed in the combination instrument 4; of a control unit 6 with the signal detection and control module 6.
1 and the integrated preselection time module 6.
2 which consists of a memory 6.
3 and a comparator 6.
4; and of a data bus 9 as well as of different electric connections 10, 11, 12.
In is addition, an air-conditioning control apparatus 5 and a heater 7 are illustrated.
The arrangement shown in the figure allows for the following method of operation for controlling the auxiliary heater.
All signals for controlling the auxiliary heater generated by the portable transmitter 1 are transmitted by way of the transmission path 13 to the receiver 2 fixed to the vehicle (not shown).
By way of the electric connection 10, which may be constructed as a data bus, the signals are transmitted to the signal detection and control module 6.
1 in the control unit 6.
All signals for controlling the auxiliary heater are detected and analyzed in the signal detection and control module 6.
1.
After the analysis, the signal detection and analysis module 6.
1 initiates the actions corresponding to the intended meaning of the control signals.
The control unit 6 can be an appropriately programmed microprocessor, a hard-wired logic circuit, or any combination thereof.
For programming the switch-on times, the transmitter contains three control keys 1.
3-1.
5 and one transmitter display 1.
2.
In the embodiment shown, one of the control keys is constructed as a programming key 1.
3.
By means of this key 1.
3, the already programmed switch-on times can be called consecutively in the roll mode (scroll) and can be displayed on the transmitter display 1.
2.
During the first operation of the programming key 1