Valve device and hydraulic control system

Patent metadata

Field	Value
Publication number	US-9932882-B2
Application number	US-201615174096-A
Country	US
Kind code	B2
Filing date	Jun 6, 2016
Priority date	Jun 11, 2015
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A first valve portion and a second valve portion are formed in a rotary valve, wherein the first and the second valve portions are arranged in an axial direction thereof. The first valve portion includes a first and a second valve windows formed in a valve member, and a first and a second valve port openings formed in a valve housing. The second valve portion includes a third valve window formed in the valve member and a third valve port opening formed in the valve housing. The valve member is rotatable in both directions of a clockwise direction and an anti-clockwise direction, so that each of the first to the third valve port openings is respectively opened or closed by the first to third valve windows. Each of the valve windows and the valve port openings of the first valve portion is formed in a rectangular shape in its developed figure in a rotational direction of the valve member.

First claim

What is claimed is:

1. A valve device comprising;
a rotary valve and an actuator connected to the rotary valve for operating a rotation of the rotary valve,
wherein the rotary valve includes:
a valve housing having a valve accommodation portion of a cylindrical shape, a fluid inlet port and multiple fluid outlet ports, each of the fluid outlet ports being formed in the valve housing in a radial direction of the valve accommodation portion and respectively connected to different fluid devices located at an outside of the rotary valve;
a valve member rotatably accommodated in the valve accommodation portion and having a cylindrical body portion for controlling an opening or closing of each of the fluid outlet ports;
an open end portion formed in the cylindrical body portion of the valve member at an axial end of the cylindrical body portion and communicated to the fluid inlet port of the valve housing, so that working fluid is supplied into an inside of the cylindrical body portion of the valve member; and
a first valve portion and a second valve portion formed in the rotary valve and arranged in an axial direction of the valve member, each of the first and the second valve portions being formed as a valve portion for opening or closing a fluid communication between the fluid inlet port and each of the fluid outlet ports,
wherein the first valve portion is composed of:
a first valve port opening formed in the valve housing at an inner peripheral wall of the valve accommodation portion, the first valve port opening being formed as an inside open end of a first fluid outlet port of the multiple fluid outlet ports;
a second valve port opening formed in the valve housing at the inner peripheral wall of the valve accommodation portion, the second valve port opening being formed as an inside open end of a second fluid outlet port of the multiple fluid outlet ports;
a first stage valve window formed in the valve member so as to pass through the cylindrical body portion in the radial direction, the first stage valve window respectively opening or closing each of the first valve port opening and the second valve port opening,
wherein the second valve portion is composed of:
a third valve port opening formed in the valve housing at the inner peripheral wall of the valve accommodation portion, the third valve port opening being formed as an inside open end of a third fluid outlet port of the multiple fluid outlet ports; and
a second stage valve window formed in the valve member so as to pass through the cylindrical body portion in the radial direction, the second stage valve window opening or closing the third valve port opening, and
wherein each of the first valve port opening, the second valve port opening and the first stage valve window of the first valve portion is formed in a rectangular shape in a rotational direction of the valve member.

2. The valve device according to claim 1 , wherein
each of the third valve port opening and the second stage valve window of the second valve portion is formed in a rectangular shape in the rotational direction of the valve member.

3. The valve device according to claim 1 , wherein
the first stage valve window comprises:
a first valve window for opening or closing each of the first valve port opening and the second valve port opening; and
a second valve window for opening or closing each of the first valve port opening and the second valve port opening,
wherein the first and the second valve windows are arranged in a circumferential direction of the cylindrical body portion and separated from each other in the circumferential direction.

4. The valve device according to claim 3 , wherein
the valve member is rotated by the actuator in both directions of a clockwise direction and an anti-clockwise direction, and
a valve-opening starting position of the first valve portion in the rotation of the valve member in the clockwise direction and a valve-opening starting position of the second valve portion in the rotation of the valve member in the anti-clockwise direction are separated from each other in the circumferential direction.

5. A cooling system for an internal combustion engine of an automotive vehicle, in which the valve device according to claim 1 is used, comprising:
a radiator for cooling the working fluid to be supplied to the internal combustion engine;
an oil cooler for heat-exchanging between engine lubricating oil and the working fluid; and
a heater core for using the working fluid as a heat source for heating a compartment of the automotive vehicle,
wherein the working fluid supplied from the internal combustion engine is introduced to the fluid inlet port,
wherein the first fluid outlet port is connected to the oil cooler,
wherein the second fluid outlet port is connected to the radiator, and
wherein the third fluid outlet port is connected to the heater core.

6. A valve device for a vehicle comprising:
a rotary valve of a multi-stage valve structure having a first valve portion of a first stage and a second valve portion of a second stage, which are arranged in an axial direction of the rotary valve; and
an actuator connected to the rotary valve for rotating a valve member of the rotary valve,
wherein the rotary valve comprises:
a valve housing having a fluid inlet port, a first fluid outlet port to be connected to an oil cooler for an engine, a second fluid outlet port to be connected to a radiator for the engine and a third fluid outlet port to be connected to a heater core of the vehicle, so that working fluid is supplied into the valve housing and outputted from at least one of the first to the third fluid outlet ports depending on a rotational position of the valve member;
the valve member of a cylindrical shape rotatably accommodated in a valve accommodation portion of the valve housing;
a first valve window, a second valve window and a third valve window, each of which is formed in the valve member so as to pass through a cylindrical body portion of the valve member in a radial direction of the rotary valve;
a first valve port opening formed at an inside of the first fluid outlet port, a second valve port opening formed at an inside of the second fluid outlet port, and a third valve port opening formed at an inside of the third fluid outlet port,
wherein the first and the second valve windows and the first and the second valve port openings form the first valve portion, while the third valve window and the third valve port opening form the second valve portion, so that the first valve port opening and the second valve port opening are respectively and operatively opened by the first or the second valve window when the valve member is rotated in either a clockwise direction or an anti-clockwise direction and the third valve port opening is operatively opened by the third valve window when the valve member is rotated in the anti-clockwise direction, and
wherein each of the valve windows and the valve port openings of the first valve portion is formed in a rectangular shape.

7. The valve device according to claim 6 , wherein
the first valve port opening to be connected to the oil cooler is opened by the first valve window and then the second valve port opening to be connected to the radiator is opened by the second valve window, when the valve member is rotated in the clockwise direction,
the third valve port opening to be connected to the heater core remains closed, when the valve member is rotated in the clockwise direction, and
the third valve port opening is opened by the third valve window, when the valve member is rotated in the anti-clockwise direction, and then the first valve port opening and the second valve port opening are sequentially and respectively opened by the secon

Assignees

• Denso Corp

Inventors

• Imasaka Yusuke

Classifications

• F01P2007/146

  using valves · CPC title

• Y10T137/86863

  Rotary valve unit · CPC title

• F01P7/16 Primary

  by thermostatic control · CPC title

• F16K11/0856 Primary

  having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug · CPC title

• F01P7/14

  the coolant being liquid · CPC title