Reciprocating piston engine with a varying compression ratio
This patent describes a reciprocating piston engine with a varying compression ratio. It comprises a block having at least one piston bore, a piston received in each bore, a head attached to the block and having a dome portion closing the top of each bore and defining with the piston a compression volume when the piston is at top dead center in the bore, a crankcase, a crank rotatably mounted in the crankcase, a connecting rod coupling each piston to the crank, means for mounting the block on the crankcase for pivotal movement about a pivot axis parallel to and spaced apart from the axis of the crank such that the size of the compression volume varies in accordance with the extent of the pivotal movement of the block about the pivot axis, and actuator means connected between the block and the crankcase for pivoting the block about the pivot axis relative to the crankcase in response to at least one signal indicative of at least one operating parameter of the engine.
- Assignee:
- NOV; NOV-91-042118; EDB-92-058557
- Patent Number(s):
- US 5025757; A
- Application Number:
- PPN: US 7-582410
- OSTI ID:
- 5774800
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reciprocating internal combustion engine
Dynamic compression internal combustion engine with yoke having an offset arcuate slot