Abstract: An interior panel part for motor vehicles, with at least one breaking line for exposing an opening when an air bag is released, which breaking line is defined by cuts on the side of the interior panel part lying opposite a visible surface, and material bridges are also provided between these cuts. The invention is distinctive due to the fact that at least one of the material bridges is wedge-shaped so that it has an undercut in the direction of the breaking line and the slim end of the wedge shape is directed towards the visible surface of the panel part. The invention further relates to a method of manufacturing such an interior panel part.

Abstract: Disclosed is a method particularly applicable to an automotive vehicle seat, through which the control of heating of heating elements is carried out by an electronic circuit, based on the temperature monitored in the heating elements and using Pulse Width Modulation (PWM). The signals applied to the heating elements are progressively adapted to the condition of the different heating elements at all times and throughout their useful life, by variation of the working cycle of the signal applied to the heating elements in the form of a fixed frequency pulse train, and applying said signal after an initial transient state, during which state a maximum voltage has been applied to the heating elements and has been maintained until reaching a desired percentage of an assigned temperature by each of said heating elements.

Abstract: Disclosed is a method particularly applicable to an automotive vehicle seat, through which the control of heating of heating elements is carried out by an electronic circuit, based on the temperature monitored in the heating elements and using Pulse Width Modulation (PWM). The signals applied to the heating elements are progressively adapted to the condition of the different heating elements at all times and throughout their useful life, by variation of the working cycle of the signal applied to the heating elements in the form of a fixed frequency pulse train, and applying said signal after an initial transient state, during which state a maximum voltage has been applied to the heating elements and has been maintained until reaching a desired percentage of an assigned temperature by each of said heating elements.