Abstract: A method for setting an injection strategy for an injector (1) by way of PWM signals in order to inject fuel in a fuel cell system (2), has the steps of: setting an injection frequency to a predefinable first value within a predefinable value range with a predefinable pulse duration in the PWM signal using a setting unit (3), and adjusting the injection frequency to a predefinable second value, different from the first value, within the predefinable value range using an adjustment unit (4), wherein the pulse duration of the PWM signal is kept constant in order to change a duty cycle of the PWM signal of the injection strategy. A corresponding circuit arrangement (8), a fuel cell system (2) and a computer program (9) are also described herein.

Abstract: The present invention relates to a method for setting an injection strategy for an injector (1) by way of PWM signals in order to inject fuel in a fuel cell system (2), having the steps of: setting an injection frequency to a predefinable first value within a predefinable value range with a predefinable pulse duration in the PWM signal using a setting unit (3), and adjusting the injection frequency to a predefinable second value, different from the first value, within the predefinable value range using an adjustment unit (4), wherein the pulse duration of the PWM signal is kept constant in order to change a duty cycle of the PWM signal of the injection strategy. The invention furthermore relates to a corresponding circuit arrangement (8), to a fuel cell system (2) and to a computer program (9).

Abstract: A fire protection cuff having a coat made of fire-resistant material and a strip made of intumescent material is characterized in that the coat includes a flexible mat, which is folded over around at least one of the longitudinal edges of the intumescent strip, so that the coat surrounds the intumescent strip at least on one large face and one of the two longitudinal edges.

Abstract: One or more embodiments of the present invention relate to a holder for a fire protection sleeve, having a mounting portion, a supporting portion and a holding portion, characterized in that the holding portion is provided with anchoring structure, which may positively interlock with the cover of a fire protection sleeve. One or more embodiments of the present invention also relate to an assembly of such a holder and a fire protection sleeve comprising a strip of an intumescent material, which is surrounded by a cover at least on one flat side and a longitudinal edge, characterized in that the anchoring structure may dig into the cover in the region of the longitudinal edge.

Abstract: One or more embodiments of the present invention relate to a holder for a fire protection sleeve, having a mounting portion, a supporting portion and a holding portion, characterized in that the holding portion is provided with anchoring structure, which may positively interlock with the cover of a fire protection sleeve. One or more embodiments of the present invention also relate to an assembly of such a holder and a fire protection sleeve comprising a strip of an intumescent material, which is surrounded by a cover at least on one flat side and a longitudinal edge, characterized in that the anchoring structure may dig into the cover in the region of the longitudinal edge.

Abstract: A fire protection cuff having a coat made of fire-resistant material and a strip made of intumescent material is characterized in that the coat includes a flexible mat, which is folded over around at least one of the longitudinal edges of the intumescent strip, so that the coat surrounds the intumescent strip at least on one large face and one of the two longitudinal edges.

Abstract: A method of and an implement for sealing a space (4) between an inner wall of a leadthrough (2) formed in constructional component (1) and at least one object (3) extending through the leadthrough (2) and including providing a support member (6; 15) fixedly and sealingly attachable to the constructional component (1), and a resilient diaphragm (7; 16) for sealingly connecting the support member (6; 15) with the constructional component (1).