07950356 is referenced by 9 patents and cites 76 patents.

In an embodiment, an internal combustion engine includes a first cylinder having a first piston and a second piston slidably disposed therein, an intake port arranged to admit a reactant into the first cylinder between the first and second pistons, and an exhaust port axially spaced from the intake port and arranged to exhaust a reaction product from the first cylinder. First and second converters are provided, which are operable with the corresponding first and second pistons, to convert mechanical energy of the first and second pistons to electrical energy and electrical energy to mechanical energy. A control system is provided that is coupled to the first and second converters. The control system is configured to control the application of electrical energy to the first and second converters to selectively position the first and second pistons during specific strokes of the engine cycle.

Title
Opposed piston electromagnetic engine
Application Number
11/973640
Publication Number
7950356 (B2)
Application Date
October 9, 2007
Publication Date
May 31, 2011
Inventor
Victoria Y H Wood
Livermore
CA, US
Lowell L Wood Jr
Bellevue
WA, US
Charles Whitmer
North Bend
WA, US
Thomas A Weaver
San Mateo
CA, US
Clarence T Tegreene
Bellevue
WA, US
Nathan P Myhrvold
Medina
WA, US
Jordin T Kare
Seattle
WA, US
Muriel Y Ishikawa
Livermore
CA, US
William H Gates III
Redmond
WA, US
Roderick A Hyde
Redmond
WA, US
Agent
Workman Nydegger
Assignee
The Invention Science Fund I
WA, US
IPC
F02B 71/00
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