Abstract: A control valve according to the present invention is configured such that when a third opening part, which is an auxiliary opening part, and a third discharge opening, which is an auxiliary connection opening, do not overlap, the third opening part and a continuous discharge opening overlap. Thus, for example, when a flow rate of cooling water for continuous circulation is required, such as during a cold start, cooling water guided through an internal passage is discharged via the continuous discharge opening in addition to cooling water guided from a bypass passage, thereby ensuring a sufficient flow rate of cooling water for continuous circulation.

Abstract: A flow rate control valve has a housing including a valve body and a main communication hole and auxiliary communication holes. The valve body includes a fluid inflow portion, a main opening portion and auxiliary opening portions formed on the valve body circumferential wall and establish fluid communication. A seal member is provided between the main communication hole and the valve body, and configured to seal between the valve body and the main communication hole. The valve body establishes the communication between one auxiliary communication hole and one auxiliary opening portion regardless of a rotational position of the valve body. In addition, the valve body changes a communication state between the main communication hole and the main opening portion and a communication state between another auxiliary communication hole and another auxiliary opening portion according to the rotational position of the valve body.

Abstract: Provided is a flow control valve and a cooling system, with which a pressure loss can be reduced. A rotor 12 includes a first guide portion 43 on the outer circumferential side of an extending portion 42 fixed to a drive shaft 13 and protruding into a space inside the rotor 12. The first guide portion 43 has a radial outer shape which increases from an x-axis positive direction side toward an x-axis negative direction side.

Abstract: A control valve according to the present invention is configured such that when a third opening part, which is an auxiliary opening part, and a third discharge opening, which is an auxiliary connection opening, do not overlap, the third opening part and a continuous discharge opening overlap. Thus, for example, when a flow rate of cooling water for continuous circulation is required, such as during a cold start, cooling water guided through an internal passage is discharged via the continuous discharge opening in addition to cooling water guided from a bypass passage, thereby ensuring a sufficient flow rate of cooling water for continuous circulation.

Abstract: Provided is a flow control valve and a cooling system, with which a pressure loss can be reduced. A rotor 12 includes a first guide portion 43 on the outer circumferential side of an extending portion 42 fixed to a drive shaft 13 and protruding into a space inside the rotor 12. The first guide portion 43 has a radial outer shape which increases from an x-axis positive direction side toward an x-axis negative direction side.

Abstract: Provided is a flow control valve and a cooling system, with which a pressure loss can be reduced. A rotor 12 includes a first guide portion 43 on the outer circumferential side of an extending portion 42 fixed to a drive shaft 13 and protruding into a space inside the rotor 12. The first guide portion 43 has a radial outer shape which increases from an x-axis positive direction side toward an x-axis negative direction side.

Abstract: Provided is a flow control valve which improves a mounting efficiency. An MCV8 includes a housing including a valve-element housing portion, a first communicating aperture which introduces cooling water, which is flown out of a first water channel formed in an engine, to a valve-element housing portion, and a second communicating aperture which discharges the cooling water in the valve-element housing portion to a second water channel formed in the engine; a rotor accommodated in the valve-element housing portion and configured to change a flow rate of the cooling water discharged to the second water channel, according to a rotation angle of the rotor; and a drive mechanism configured to control the rotation angle of the rotor. The first and second communicating apertures open in an engine-side mounting surface of the housing.

Abstract: Provided is a flow control valve and a cooling system, with which a pressure loss can be reduced. A rotor 12 includes a first guide portion 43 on the outer circumferential side of an extending portion 42 fixed to a drive shaft 13 and protruding into a space inside the rotor 12. The first guide portion 43 has a radial outer shape which increases from an x-axis positive direction side toward an x-axis negative direction side.

Abstract: Flow rate control valve CV has first housing 11 having introduction opening 10 opening in axial direction of hollow valve body accommodating portion 13 and introducing cooling water and first to third exhaust ports E1-E3, each of which is formed so as to have opening cross section that is smaller than that of introduction opening 10, radially communicates with valve body accommodating portion 13 and exhausts cooling water in valve body accommodating portion 13; and valve body 3 rotatably supported in valve body accommodating portion 13 and having opening portions M1-M3 whose overlap state with exhaust ports E1-E3 is changed according to rotation position of valve body 3. Opening cross section between introduction opening 10 and third opening portion M3 (exhaust port E3) is reduced in axial direction of valve body accommodating portion 13, thereby suppressing rapid reduction of flow passage sectional area and decreasing flow resistance of cooling water.

Abstract: Provided is a flow rate control valve capable of reducing a torque when a valve body in a housing is rotationally driven. A flow rate control valve includes a seal member configured to prevent or reduce a leak of fluid from a main communication hole or a main opening portion into a space portion. A valve body configured to be rotationally driven by a drive mechanism establishes communication between a first auxiliary communication hole and a first auxiliary opening portion regardless of a rotational position of the valve body, and also changes a communication state between the main communication hole and the main opening portion and a communication state between a second auxiliary communication hole and a second auxiliary opening portion according to the rotational position of the valve body.

Abstract: Provided is a flow control valve which improves a mounting efficiency. An MCV8 includes a housing including a valve-element housing portion, a first communicating aperture which introduces cooling water, which is flown out of a first water channel formed in an engine, to a valve-element housing portion, and a second communicating aperture which discharges the cooling water in the valve-element housing portion to a second water channel formed in the engine; a rotor accommodated in the valve-element housing portion and configured to change a flow rate of the cooling water discharged to the second water channel, according to a rotation angle of the rotor; and a drive mechanism configured to control the rotation angle of the rotor. The first and second communicating apertures open in an engine-side mounting surface of the housing.

Abstract: Flow rate control valve CV has first housing 11 having introduction opening 10 opening in axial direction of hollow valve body accommodating portion 13 and introducing cooling water and first to third exhaust ports E1-E3, each of which is formed so as to have opening cross section that is smaller than that of introduction opening 10, radially communicates with valve body accommodating portion 13 and exhausts cooling water in valve body accommodating portion 13; and valve body 3 rotatably supported in valve body accommodating portion 13 and having opening portions M1-M3 whose overlap state with exhaust ports E1-E3 is changed according to rotation position of valve body 3. Opening cross section between introduction opening 10 and third opening portion M3 (exhaust port E3) is reduced in axial direction of valve body accommodating portion 13, thereby suppressing rapid reduction of flow passage sectional area and decreasing flow resistance of cooling water.