Claims
- 1. A lost motion engine valve actuation system comprising:a lever with first and second ends, said lever second end being adapted to provide an engine valve actuation motion: a housing located adjacent to the lever, said housing having a bore therein; an adjustable piston partially disposed in said bore and in continuous contact with the first end of the lever; a means for applying motion to the lever, said means for applying motion contacting the lever in between the first and second ends thereof; means for biasing the lever into continuous contact with the means for applying motion; means for determining a desired engine valve actuation; means for adjusting the position of the adjustable piston responsive to the desired engine valve actuation; and a single fluid passage connecting the bore to the means for adjusting position, wherein the adjusting means comprises a solenoid actuated trigger valve.
- 2. The system of claim 1 wherein the biasing means comprises at least one spring.
- 3. The system of claim 2 wherein the means for applying motion comprises a cam.
- 4. The system of claim 1 wherein the means for applying motion comprises a cam.
- 5. The lost motion system of claim 1 wherein the lever contacts two engine valves.
- 6. The lost motion system of claim 1 further comprising a fluid accumulator in hydraulic communication with the trigger valve.
CROSS REFERENCE TO RELATED PATENT APPLICATION
This application relates to and claims priority on provisional application Ser. No. 60/069,270, filed Dec. 11, 1997, and this application is a continuation of utility application Ser. No. 09/209,486, filed Dec. 11, 1998, now U.S. Pat. No. 6,085,705.
US Referenced Citations (15)
Foreign Referenced Citations (1)
Number |
Date |
Country |
43 34 995 A1 |
Apr 1995 |
DE |
Non-Patent Literature Citations (1)
Entry |
F. Payri, J.M. Desants, and J.M. Corberan, “A Study of the Performance of a SI Engine Incorporating a Hydraulically Controlled Variable Valve Timing System,” SAE Technical Paper Series, International Congress and Exposition, Detroit, Michigan, Feb. 29-Mar. 4, 1988. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/069270 |
Dec 1997 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/209486 |
Dec 1998 |
US |
Child |
09/594791 |
|
US |