| US 7,455,058 B2 | ||
| Method and apparatus for controlling stationary gaseous-fueled internal combustion engines | ||
| Raymond A. Raffesberger, 1364 Corvidae St., Carlsbad, Calif. 92011 (US) | ||
| Assigned to Raymond A. Raffesberger, Carlsbad, Calif. (US) | ||
| Filed on Jul. 14, 2006, as Appl. No. 11/486,719. | ||
| Claims priority of provisional application 60/719093, filed on Oct. 26, 2005. | ||
| Prior Publication US 2007/0089719 A1, Apr. 26, 2007 | ||
| Int. Cl. F02D 41/00 (2006.01) | ||
| U.S. Cl. 123—694 [123/696; 123/672; 701/109] | 18 Claims |
| 1. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
measuring an air to fuel ratio of the engine;
calculating a difference between the measured air to fuel ratio and a desired air to fuel ratio for the engine; and
automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable
the engine to run at substantially the desired air to fuel ratio,
wherein measuring the air to fuel ratio utilizes a wideband oxygen sensor,
wherein measuring the air to fuel ratio includes utilizing a wideband oxygen sensor interface electrically connected to the
wideband oxygen sensor,
wherein the wideband oxygen sensor interface provides an output voltage proportional to the measured air to fuel ratio according
to the following equation:
measured air to fuel ratio=(2*output voltage)+10.
|