| 摘要 |
<p>An automatic control system is shown to vary the mixture of fuel-to-air ratio in a conventional internal combustion engine to minimize resulting pollutants and maximize engine efficiency and performance. The system senses the manifold vacuum (44) and engine acceleration, and based in part upon such inputs forces the mixture leaner until an instability event is detected at which time the system rapidly forces the mixture richer at a predetermined rate and time to overcome the instability. The mixture is then again forced leaner. The rate of leaning is controlled by the vacuum pressure so that no leaning occurs at or near full throttle and the rate of leaning is decreased as power requirements decrease. Further, secondary air is introduced substantially tangentially (33, 35) to the primary air/fuel flow to maximize mixing between the primary and secondary air flows.</p> |
