Engine with a variable compression ratio

Details Engine with a variable compression ratio Engine with a variable compression ratio

2007-02-13

2007-02-13

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Four-cycle

Variable clearance

C123S197400

Reexamination Certificate

active

11177888

ABSTRACT:
A VCR engine includes a crankshaft, a driveshaft, a plurality of crankshaft-driveshaft arm assemblies, a means to lift the crankshaft up and down, and a transmission assembly. The crankshaft-driveshaft arm assembly is a piece of metal to which a bearing that holds the crankshaft and another bearing that holds the driveshaft are affixed. The means to lift up and down the crankshaft of the preferred embodiment of this invention includes a plurality of jackscrew assemblies. When the crankshaft is lifted or lowered, the crankshaft will only move around the driveshaft with a fixed radius. The transmission assembly, which is generally a set of gears, transmits rotational movements of the crankshaft to the driveshaft.

REFERENCES:
patent: 4998511 (1991-03-01), Van Avermete
patent: 5443043 (1995-08-01), Nilson et al.
patent: 5908014 (1999-06-01), Leighthinger
patent: 6202623 (2001-03-01), Ehrlich
patent: 6247430 (2001-06-01), Yapici
patent: 6260532 (2001-07-01), Mendler
patent: 6443107 (2002-09-01), Mendler
patent: 6450136 (2002-09-01), Klomp et al.
patent: 6588384 (2003-07-01), Yapici

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