Abstract: A compression and expansion machine is disclosed that includes a body with at least one chamber about an axis of symmetry, and pistons rotating about the axis of symmetry and dividing the chamber into cells rotating with the pistons. The invention also includes a device for coordinating the movement of the pistons and configured so that, during one rotation cycle, each of the cells performs at least one first expansion/contraction cycle corresponding to a stage of compressing a first stream of gas passing through this cell and at least one second expansion/contraction cycle corresponding to a stage of expanding a second stream of gas passing through this cell.

Abstract: The invention relates to a compression and expansion machine comprising a body (12a) with at least one chamber (12) of revolution about an axis of symmetry, and pistons (14a, 14b, 14c, 14d) rotating about the axis of symmetry and dividing the chamber into cells (15a, 15b, 15c, 15d) rotating with the pistons, said machine furthermore comprising a device (22) for coordinating the movement of said pistons and configured so that, during one rotation cycle, each cell (15a, 15b, 15c, 15d) performs at least one first expansion/contraction cycle corresponding to a stage of compressing a first stream of gas passing through this cell and at least one second expansion/contraction cycle corresponding to a stage of expanding a second stream of gas passing through this cell.

Abstract: A heat exchanger (10) comprises an alternating stacking of first plates (12) and second plates (14) provided respectively with first corrugations (16) separated by a first pitch (P1) and second corrugations (18) separated by a second pitch (P2), which is different from the first pitch (P1). Between the plates, first flow channels are defined having a first cross sectional area adapted to a first fluid (F1) which alternate with second flow channels having a second cross sectional area adapted to a second fluid (F2). The invention applies in particular to heat exchangers for motor vehicles.

Abstract: A control valve for a cooling circuit of an automobile engine comprises a valve body (12) provided with an input (20) and a number of outputs (22, 24, 26) for a coolant, an adjustment member (14) designed to rotate about a rotation axis (XX), an electric motor (30) coupled to the adjustment member (14) to bring it into chosen angular positions to control the distribution of the coolant between the outputs (22, 24, 26), and an absolute position sensor (50) coupled in rotation to the adjustment member (14) to deliver an output signal (S) representative of the angular position of the adjustment member (14), wherein the motor is able to be driven by a position controller (CP) which is designed to receive the output signal (S) and which is used to adjust the angular position of the adjustment member (14).

Abstract: A control valve for a cooling circuit of an automobile engine comprises a valve body (12) provided with an input (20) and a number of outputs (22, 24, 26) for a coolant, an adjustment member (14) designed to rotate about a rotation axis (XX), an electric motor (30) coupled to the adjustment member (14) to bring it into chosen angular positions to control the distribution of the coolant between the outputs (22, 24, 26), and an absolute position sensor (50) coupled in rotation to the adjustment member (14) to deliver an output signal (S) representative of the angular position of the adjustment member (14), wherein the motor is able to be driven by a position controller (CP) which is designed to receive the output signal (S) and which is used to adjust the angular position of the adjustment member (14).

Abstract: A heat exchanger (10) comprises an alternating stacking of first plates (12) and second plates (14) provided respectively with first corrugations (16) separated by a first pitch (P1) and second corrugations (18) separated by a second pitch (P2), which is different from the first pitch (P1). Between the plates, first flow channels are defined having a first cross sectional area adapted to a first fluid (F1) which alternate with second flow channels having a second cross sectional area adapted to a second fluid (F2). The invention applies in particular to heat exchangers for motor vehicles.

Abstract: The invention relates to a heat exchanger comprising at least a first, a second and a third heat-exchange portions (221; 222; 223) situated substantially in one and the same plane, said cluster allowing an independent circulation of fluid in each of said exchange portions (221; 222; 223). The invention also relates to a system for managing the thermal energy developed by a motor vehicle engine comprising such a heat exchanger. Application to the automotive field.