Cardioid cycle internal combustion engine
US6526935B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Jul 16, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/32
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The cardioid cycle engine utilizes a centrally located output shaft which carries an orbiting crankshaft for each cylinder. The journals of the orbiting crankshafts trace a heart shaped pattern, hence the term “cardioid” cycle. The crankshafts are geared to rotate within the revolving output shaft in the same direction and at the same angular velocity as the output shaft. in the preferred embodiments the offsets of the two shafts are adjusted so that they are additive in the second quadrant of output shaft rotation. This configuration produces four strokes, variable in length and duration, in each 360° of output shaft rotation. The expansion stroke can exceed twice the intake stroke in length, and TDC can occur when the output shaft is well past the normal TDC position, allowing tangential force on the shaft when cylinder pressure is highest. Compression ratios can be varied over the full useable range while the engine is operating. When used as an engine, fuel efficiency and torque are increased, and when used as a compressor the peak torque loads are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.