Engine feedback control embodying learning
First Claim
1. An internal combustion engine comprising a combustion chamber, an air-fuel charging system for delivering an air and fuel charge to said combustion chamber for combustion therein, a combustion condition sensor for determining the air/fuel ratio in said combustion chamber, feedback control means for adjusting the air/fuel ratio delivered to said combustion chamber in response to the output of said combustion condition sensor, a memory for storing corrective data from said feedback control means, and means for utilizing the contents of said memory for subsequent control of said engine air/fuel ratio in a non-feedback control mode utilizing the memorized data for the sole control without requiring new data from said combustion condition sensor for such control.
1 Assignment
0 Petitions
Accused Products
Abstract
A feedback control system and method for operating an internal combustion engine to provide the desired air/fuel ratio under all running conditions. The feedback control operates to modify the fuel/air ratio from that achieved by a basic setting that is derived from parameters of engine performance so as to maintain the desired ratio. The basic setting is updated based upon previous feedback control corrections in order to minimize the amount of corrections required and reduce hunting.
17 Citations
28 Claims
- 1. An internal combustion engine comprising a combustion chamber, an air-fuel charging system for delivering an air and fuel charge to said combustion chamber for combustion therein, a combustion condition sensor for determining the air/fuel ratio in said combustion chamber, feedback control means for adjusting the air/fuel ratio delivered to said combustion chamber in response to the output of said combustion condition sensor, a memory for storing corrective data from said feedback control means, and means for utilizing the contents of said memory for subsequent control of said engine air/fuel ratio in a non-feedback control mode utilizing the memorized data for the sole control without requiring new data from said combustion condition sensor for such control.
- 15. A method of operating an internal combustion engine comprising a combustion chamber, an air-fuel charging system for delivering an air and fuel charge to said combustion chamber for combustion therein, a combustion condition sensor for determining the air/fuel ratio in said combustion chamber, said method comprising the steps of adjusting the air/fuel ratio delivered to said combustion chamber in response to the output of said combustion condition sensor, storing corrective data from said feedback control means in a memory, and utilizing the contents of said memory for subsequent control of said engine air/fuel ratio in a non-feedback control mode utilizing the memorized data for the sole control without requiring new data from said combustion condition sensor for such control.
Specification