HYDRAULIC CONTROL DEVICE

• US 20120261009A1
• Filed: 04/12/2012
• Published: 10/18/2012
• Est. Priority Date: 04/14/2011
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: MIYACHI, Eiji, Ono, Hisashi
• Granted Patent: US 9,291,283 B2
• Time in Patent Office: Days
• US Class Current: 137/565.01
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F01L 2001/34426 Oil control valves
• CPC Class Codes: F01L 2001/3443 Solenoid driven oil control valves
• CPC Class Codes: F01L 2001/34433 Location oil control valves
• CPC Class Codes: F01L 2001/3444 Oil filters
• CPC Class Codes: F01L 2001/34466 with multiple locking devices
• CPC Class Codes: F01L 2001/34473 Lock movement perpendicular to camshaft axis
• CPC Class Codes: F01L 2001/34479 Sealing of phaser devices
• CPC Class Codes: F01L 2001/34483 Phaser return springs
• CPC Class Codes: F01M 1/16 Controlling lubricant pressure or quantity rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22
• CPC Class Codes: F01M 1/20 concerning lubricant pressure
• CPC Class Codes: F04C 14/26 using bypass channels
• CPC Class Codes: F04C 14/265 being obtained by displacing a lateral sealing face
• CPC Class Codes: F15B 11/162 for giving priority to particular servomotors or users
• CPC Class Codes: F15B 13/022 Flow-dividers; Priority valves
• CPC Class Codes: F16K 47/10 in which the medium in one direction must flow through the throttling channel, and in the other direction may flow through a much wider channel parallel to the throttling channel
• CPC Class Codes: Y10T 137/7847 With leak passage
• CPC Class Codes: Y10T 137/85978 With pump
• CPC Class Codes: Y10T 137/86002 Fluid pressure responsive

Abstract

A hydraulic control device includes a first predetermined portion receiving the oil discharged from a pump, a first channel establishing communication between the pump and the first predetermined portion, a second channel branched from the first channel for supplying oil to a second predetermined portion, a flow passage area regulation unit arranged on the second channel and equipped with a spool that moves in a flow passage area increasing direction when an oil pressure in the second channel increases and in a decreasing direction when the oil pressure decreases, and a bypass channel, which is provided separately from a portion of the second channel where the spool disconnects the second channel, establishes communication between an upstream side and a downstream side of the second channel relative to the flow passage area regulation unit and supplies oil to the second predetermined portion even when the spool disconnects the second channel.

Claims

1. A hydraulic control device comprising:

a pump for discharging oil;

a first predetermined portion configured to receive the oil discharged from the pump;

a first channel establishing a communication between the pump and the first predetermined portion;

a second channel branched from the first channel for supplying oil to a second predetermined portion arranged separately from the first predetermined portion;

a flow passage area regulation unit arranged on the second channel, the flow passage area regulation unit equipped with a spool moving in a direction for increasing a flow passage area when an oil pressure in the second channel increases and moving in a direction for decreasing a flow passage area when the oil pressure in the second channel decreases; and

a bypass channel provided separately from a portion of the second channel where the spool disconnects the second channel, the bypass channel establishing a communication between an upstream side and a downstream side of the second channel relative to the flow passage area regulation unit, the bypass channel supplying oil to the second predetermined portion even in a closed state in which the spool disconnects the second channel.

2. The hydraulic control device according to claim 1, wherein the bypass channel is formed on the spool.

3. The hydraulic control device according to claim 1, wherein the bypass channel is provided as an annular groove formed on an outer peripheral surface of the spool.

4. The hydraulic control device according to claim 1, wherein the bypass channel is formed on a valve body, which houses the spool.

5. The hydraulic control device according to claim 1, wherein the bypass channel is provided as an annular groove formed on the valve body, which houses the spool.

6. The hydraulic control device according to claim 1, wherein the bypass channel includes

a first elongated groove formed on an outer peripheral surface of the valve body, which houses the spool, the first elongated groove connecting to the upstream side of the second channel,

a second elongated groove formed on the outer peripheral surface of the valve body, the second elongated groove connecting to the downstream side of the second channel, and

a through-hole formed on the valve body and connecting the first elongated groove and the second elongated groove.

7. The hydraulic control device according to claim 6, wherein the through-hole includes a regulator portion having a smaller cross sectional area relative to a remaining portion of the through-hole.

8. The hydraulic control device according to claim 1, wherein the bypass channel is formed on the valve housing to which the flow passage area regulation unit is provided.

9. A hydraulic control device comprising:

a pump for discharging oil;

a first predetermined portion configured to receive the oil discharged from the pump;

a first channel establishing a communication between the pump and the first predetermined portion;

a second channel branched from the first channel for supplying oil to a second predetermined portion arranged separately from the first predetermined portion;

a flow passage area regulation unit moving in the direction for increasing the flow passage area when an oil pressure in the second channel increases and moving in a direction for decreasing a flow passage area when the oil pressure in the second channel decreases; and

a bypass channel supplying oil to the second predetermined portion during which the flow passage area regulation unit is disconnecting the second channel by establishing a communication between an upstream side and a downstream side of the second channel relative to the flow passage area regulation unit.

10. A hydraulic control device comprising:

a pump for discharging oil;

a first predetermined portion configured to receive the oil discharged from the pump;

a first channel establishing a communication between the pump and the first predetermined portion;

a second channel branched from the first channel and supplying oil to a second predetermined portion arranged separately from the first predetermined portion;

a flow passage area regulation unit arranged on the second channel for controlling an oil pressure applies on the first predetermined portion by controlling a flow passage area of the second channel; and

a bypass channel supplying oil to the second predetermined portion even when the flow passage area regulation unit is disconnecting the second channel.