| 摘要 |
<p>Comfort warming control system (2) for a vehicle provided with a comfort warming system with one or more heating coils (4), comprising a control unit (6) and a feed unit (8) which is adapted to conveying to said heating coil a pulsewidth-modulated warming signal with a cycle length PH and a variable pulsewidth PW. The comfort warming control system further comprises a measuring unit (12) adapted to measuring the current IH and the voltage UH across the heating coil when the warming signal is conveyed to the heating coil, to determining the resistance of the heating coil on the basis of the measured voltage UH and the measured current IH and to generating on the basis thereof a resistance signal (14') for conveying to the control unit, the control unit being adapted to determining on the basis of the resistance a parameter related to the heating coil. According to an embodiment, the control system comprises a temperature input unit (10) for input of desired temperatures for the comfort warming system, and the control unit is adapted to determining a pulsewidth (PW ) for the warming signal on the basis of the current and/or resistance measured, the temperature desired and the parameter determined, so that the desired temperature is reached, and to delivering a control signal (16) to the feed unit which is adapted to conveying the warming signal to the heating coil with the pulsewidth determined.</p> |
