Claims
- 1. An engine valve actuation system comprising:
an intake valve moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid; a cam assembly connected to move said intake valve between said first position and said second position; a fluid actuator configured to selectively prevent said intake valve from moving to said first position; a source of fluid in fluid communication with said fluid actuator; a directional control valve configured to control a flow of fluid between said source of fluid and said fluid actuator; and a fluid line check valve disposed between said source of fluid and said directional control valve and only allowing said flow of fluid to travel from said source of fluid to said directional control valve.
- 2. The engine valve of claim 1 further including:
a bleed orifice, wherein said bleed orifice and said fluid line check valve are disposed in parallel between said source of fluid and said directional control valve.
- 3. The engine valve actuation system of claim 1 further including:
a main gallery positioned between said source of fluid and said check valve; a fluid rail positioned between said fluid line check valve and said directional control valve said fluid rail having a first end and a second end, wherein said first end is in fluid communication with said fluid line check valve; and a fluid line disposed between said main gallery and said fluid rail.
- 4. The engine valve actuation system of claim 3 wherein said fluid line check valve is disposed in said fluid line.
- 5. The engine valve actuation system of claim 3 wherein said fluid line check valve is positioned closer to said main gallery than said fluid rail.
- 6. The engine valve actuation system of claim 3 wherein said fluid line check valve is integral with said main gallery.
- 7. The engine valve actuation system of claim 3 wherein said fluid line check valve is integral with said fluid line.
- 8. The engine valve actuation system of claim 3 further including a control valve in fluid communication with said second end of said fluid rail and being moveable between a first position to prevent said flow of fluid from said fluid rail and a second position to allow said flow of fluid from said fluid rail.
- 9. The engine valve actuation system of claim 8 further including a controller configured to move said control valve between said first position and said second position.
- 10. The engine valve actuation system of claim 8 further including a tank in fluid communication with said source of fluid and said control valve.
- 11. The engine valve actuation system of claim 3 further including a restrictive orifice disposed between said fluid line check valve and said first end of said fluid rail.
- 12. A method of controlling fluid pressure in a fluid rail comprising:
delivering fluid to a fluid rail from a fluid source; Moving a cam to actuate an engine valve; delivering said fluid from said fluid rail to an actuator chamber of a fluid actuator; moving an actuator rod of said fluid actuator from a first position to a seems position to a second position in response to said delivering said fluid from said fluid rail to said actuator chamber delivering fluid from said actuator chamber back to said fluid rail; limiting a fluid flow from said fluid rail to said fluid source in response to said delivering fluid from said actuator chamber back to said fluid rail step.
- 13. The method of claim 12 wherein said limiting step further includes:
preventing said fluid flow from said fluid rail to said fluid source in response to said delivering fluid from said actuator chamber back to said fluid rail step.
- 14. The method of claim 12 further including:
bleeding fluid through a bleed orifice from said fluid rail when said fluid rail is not in use.
- 15. The method of claim 12 further including:
increasing an effective volume of said fluid rail.
RELATED APPLICATIONS
[0001] This application is a continuation-in-part of co-pending application Ser. No. ______ filed on Oct. 30, 2002 for Engine Valve Actuation System, which is a CIP of co-pending application Ser. No. 10/144,062 filed on May 14, 2002 for Engine Valve Actuation System.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10144062 |
May 2002 |
US |
Child |
10309801 |
Dec 2002 |
US |