Abstract: The invention proposes a method for recovering a liquid collected on an interior or exterior surface (1, 19) of a motor vehicle bodywork (17) or glazing (2) element, characterized in that it consists in analysing a quantity of the collected liquid stream using a device (30) for measuring or estimating a parameter indicative of a state of pollution of the collected liquid, such as its turbidity, in comparing a measured value of the turbidity against a threshold value and, when the measured value is below the threshold value, in directing the collected liquid stream towards a recovery unit (9) or, when the measured value is above the threshold value, in discharging the collected liquid stream, for example in the form of waste.

Abstract: The invention relates to a system (10) for compression of a gas (G) designed to dry at least one sensor (5) of a motor vehicle, comprising: a pump (2) for injection of a liquid (L) which is designed to pump the liquid from a liquid container (4) to a compressor (1); the compressor (1) in which the liquid (L) is designed to compress the gas (G); and at least one element (3) to control a flow of the gas (G), situated downstream from the compressor (1), downstream being understood as a direction (S2) of circulation of a compressed gas (G) in the compression system (10) which permits or prevents circulation of the gas (G) selectively in the direction of the at least one sensor (5).

Abstract: The invention proposes a method for recovering a liquid collected on an interior or exterior surface (1, 19) of a motor vehicle bodywork (17) or glazing (2) element, characterized in that it consists in analysing a quantity of the collected liquid stream using a device (30) for measuring or estimating a parameter indicative of a state of pollution of the collected liquid, such as its turbidity, in comparing a measured value of the turbidity against a threshold value and, when the measured value is below the threshold value, in directing the collected liquid stream towards a recovery unit (9) or, when the measured value is above the threshold value, in discharging the collected liquid stream, for example in the form of waste.