Fuel controller
US4913121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Mar 14, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2454
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a novel fuel controller of an internal combustion engine. In particular, it relates to a novel fuel controller which securely corrects characteristic variation with time of air-flow sensor used for controlling flow of fuel. The fuel controller embodied by the invention incorporates a memory which stores the negative feedback correction value of air-fuel ratio or the value related to it at the flow-volume point representing variation of characteristic of air-flow sensor or at an adjacent point of it so that the basic volume needed for controlling flow of fuel can be corrected by applying the content of memory. As a result, even if characteristic of the air-flow sensor varies, the system can achieve satisfactory control condition. The fuel controller inhibits renewal of the study on the negative feedback correction value for the predetermined period in accordance with the opening/closing condition of the purge-control valve. As a result, the fuel controller can securely and constantly perform satisfactory fuel-flow control operation without being influenced by erroneous air-fuel ratio caused by presence of purged gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.