초록 ▼

An automatic control system is shown to vary the mixture of fuel-to-air in a conventional internal combustion engine to minimize resulting pollutants and maximize engine efficiency and performance. The system senses manifold vacuum and engine acceleration and based, in part, upon such inputs forces

An automatic control system is shown to vary the mixture of fuel-to-air in a conventional internal combustion engine to minimize resulting pollutants and maximize engine efficiency and performance. The system senses manifold vacuum 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 period 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 to the primary air/fuel flow to maximize mixture between the primary and secondary flows.

대표청구항 ▼

An engine having a control system for controlling a valve means in said engine to alter the ratio of the fuel/air mixture applied to said engine, comprising: means for controlling said valve means to alter said ratio of the fuel/air of said mixture wherein said controlling means generally is changin

An engine having a control system for controlling a valve means in said engine to alter the ratio of the fuel/air mixture applied to said engine, comprising: means for controlling said valve means to alter said ratio of the fuel/air of said mixture wherein said controlling means generally is changing said ratio of said mixture at a first rate and in a leaner direction; means for detecting the occurrence of deceleration in said engine above a set value indicative of a weak combustion event, said detection means further having means for generating a signal and sending said signal to said controlling means when said deceleration above said set value is detected; and said controlling means, upon receipt of said signal, changing said ratio of said mixture at a second rate and in a richer direction for a predetermined period of time, said second rate being faster than said first rate, after which said period of time said controlling means again changes said ratio at said first rate and in said leaner direction.