Akwel Sa

Akwel

Regis Munoz

Matthieu Bardin

A heating device intended to heat body, such as fluid contained in fluid circuit, the device including at least one electric heating element, as well as at least one control module to electrically power the heating element, the heating element being formed by propulsive winding circuit of direct-current electric motor which, when it is electrically powered by a direct supply voltage, generates drive force which tends to drive the motor in direction of displacement determined by the polarity of the supply voltage, and the control module including activation mode called heating oscillating mode, according to which the control module causes a warm-up of the propulsive winding circuit by Joule effect by applying at the terminals of the winding circuit an alternating supply voltage whose polarity switches, alternately and automatically, according to predetermined frequency called heating frequency, from a first polarity to opposite second polarity.

Method for heating a fluid circuit by supplying alternating current to a direct-current pump motor

A measuring device that measures the level of fluid in a tank, for example a level of an aqueous urea solution in a tank for catalytic converters of combustion engines. The measuring means include: at least one sensor including a capacitive element electrically coupled to an oscillator configured to deliver a signal Swhose frequency Fis a function of the capacitance of the capacitive element; at least one sensor being intended to be disposed outside of the tank, so that the capacitance of the capacitive element varies based on the level n of the fluid, when the level is comprised between a first threshold hand a second threshold h; a processing module, coupled to at least one sensor, and configured to determine the level n of fluid in the tank based on the frequency of the signal S.

Device for contactless measurement of a level in a tank

A safety device intended to detect a leakage in a dry area of an automotive liquid used in a fluid circuit onboard a vehicle, the automotive liquid containing at least one dangerous substance other than water, such as urea, the device including a detection cell sensitive, on the one hand, to the presence of a liquid in the dry area and, on the other hand, to the possible dangerous substance content of the liquid, the device also including a selective analysis unit, capable of distinguishing on the one hand whether the detection cell is in the presence of a liquid or not, and on the other hand, in the presence of liquid, whether the present liquid corresponds to the automotive liquid containing the dangerous substance or to another liquid, calledneutral liquid, such as a water condensate.

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Saint Rambert d'Albon, France

Regis Munoz