Claims
- 1. An oil pressure control apparatus, comprising:
a source of hydraulic pressure; a hydraulic actuator which is actuated by hydraulic pressure; a fluid passage which is in communication with the source of hydraulic pressure and the hydraulic actuator; and a control valve which is disposed in the fluid passage for controlling the hydraulic pressure introduced to the actuator, the control valve comprising:
a valve body; and a filter member, the filter member having a hook provided at one end of the filter member, the filter member is held under a tension by the hook.
- 2. The oil pressure control apparatus as claimed in claim 1, the filter member further comprising:
a filter portion; and a frame portion provided around the filter portion, the frame portion comprises a synthetic resin.
- 3. The oil pressure control apparatus as claimed in claim 2, the frame portion having a pair of main frames provided on both sides of the filter in the direction along longitudinal axis of the filter member and a plurality of crosspieces provided between the frames; and
wherein the crosspieces are connecting the main frames, and one of the crosspieces comprises the hook.
- 4. The oil pressure control apparatus as claimed in claim 1, the valve body having an annular groove in a circumferencial direction of the valve body, the filter member is provided in the annular groove.
- 5. An oil pressure control apparatus for an internal combustion engine comprising:
a source of hydraulic pressure; a hydraulic actuator which is actuated by hydraulic pressure; a fluid passage which is in communication with the source of hydraulic pressure and the hydraulic actuator; and a control valve which is disposed in the fluid passage for controlling the hydraulic pressure introduced to the actuator, the control valve comprising:
a valve body; and a filter member, the filter member having a hook provided at one end of the filter member, the filter member is held under a tension by the hook.
- 6. The oil pressure control apparatus as claimed in claim 1, wherein the engine includes a valve and a valve spring resiliently urging the valve for closing an inlet or an exhaust port;
wherein the hydraulic actuator comprises:
a camshaft rotatably mounted on a cylinder head for opening and closing the valve against a force of the valve spring, the camshaft being subject to an alternating torque of the valve spring; a sprocket rotatably mounted on the camshaft and being operative to transmit a revolution of a crankshaft, the camshaft receiving a force of a crankshaft revolution; a phase changer disposed between the camshaft and the sprocket for changing a rotational phase of the camshaft relative to the sprocket; and a chamber defined between the camshaft and the sprocket and connected to the inlet passage; and wherein the first filter damps the pulsing stream that is caused by the alternating torque of the valve spring.
Priority Claims (2)
Number |
Date |
Country |
Kind |
JP11-163584 |
Jun 1999 |
JP |
|
JP11-176978 |
Jun 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of application Ser. No. 09/577,620, filed on May. 25, 2000.
Continuations (2)
|
Number |
Date |
Country |
Parent |
09986782 |
Nov 2001 |
US |
Child |
10665499 |
Sep 2003 |
US |
Parent |
09577620 |
May 2000 |
US |
Child |
09986782 |
Nov 2001 |
US |