Control valve for a cooling circuit of an automobile engine

摘要

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).

主权项

1. A control valve for a cooling circuit of an automobile engine, said control valve comprising:
a valve body (12) provided with an input (20) and a number of outputs (22, 24, 26) for a coolant; an adjustment member (14) having a rotatable shaft (28) configured to rotate in both a clockwise and counter-clockwise direction about a rotation axis (XX); an electric motor (30) having a rotatable output shaft (32), a first pinion (34) on the output shaft (32), a rotatable first shaft (38), a toothed first wheel (36) on the first shaft (38) meshing with the first pinion (34), a second pinion (40) on the first shaft (38), a rotatable second shaft (44), a toothed second wheel (42) on the second shaft (44) meshing with the second pinion (40), a third pinion (46) on the second shaft (44), and a toothed third wheel (48) on the shaft (28) of the adjustment member (14) meshing with the third pinion (46) to reduce the output between the output shaft (32) of the electric motor (30) and the shaft (28) of the adjustment member (14) to bring the adjustment member (14) into chosen angular positions to control the distribution of the coolant between the outputs (22, 24, 26); an absolute position sensor (50) comprising a rotor (52) mounted directly on the shaft (28) of the adjustment member (14) and a stator (54) mounted on the valve body (12) facing the rotor (52), both being configured to deliver an output signal (S) representative of the angular position of the adjustment member (14); and a position controller (CP) configured to drive the electric motor (30) and to receive the output signal (S) and which is used to adjust the angular position of the adjustment member (14), and wherein the electric motor (30) is configured to rotate selectively in the clockwise direction or in the counterclockwise direction under the control of the position controller (CP) to minimize an angular displacement from one position to another.