Internal combustion engine camshaft phaseshift control system
This patent describes an internal combustion engine, a hydraulic system for varying the timing of an intake valve camshaft and an exhaust valve camshaft relative to a crankshaft. It comprises a drive flange adapted to be rotatably coupled to a crank shaft for rotation about one the camshaft axis; a driven flange coupled to the camshaft for rotation above the one camshaft axis; a hydraulic coupling including a housing means connected to one of the flanges and a piston means cooperating with the housing means and connected to the other of the flanges; valve means for regulating the flow of fluid in the conduit means in response to a control signal to cause the drive and driven flanges to rotate relative to one another in a direction selected without any external power utilizing the cyclically varying fluid pressure within the fluid chambers.
- Assignee:
- Ford Motor Co., Dearborn, MI (United States)
- Patent Number(s):
- US 5117784; A
- Application Number:
- PPN: US 7-695162
- OSTI ID:
- 7238419
- Resource Relation:
- Patent File Date: 3 May 1991
- Country of Publication:
- United States
- Language:
- English
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