Evaporative fuel control apparatus of internal combustion engine
US5143040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Aug 7, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/0042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An evaporative fuel control apparatus of an internal combustion engine for controlling a purge correction amount and a fuel injection amount in response to a concentration of fuel vapor in intake mixture. The apparatus includes a detection part for detecting operating conditions of the engine and for supplying signals indicative of the operating conditions, a purge valve for controlling a flow of fuel vapor from a fuel tank to an intake passage, and a calculation part for calculating the fuel injection amount in response to the signals. The apparatus also includes a first injection control part for varying a feedback correction factor of an air-fuel ratio in response to the signals so as to maintain the air-fuel ratio at a stoichiometric value, and for correcting the fuel injection amount with the feedback correction factor, a second injection control part for correcting the fuel injection amount in response to the fuel vapor concentration which is determined from the varied feedback correction factor, and a purge correction part for correcting a purging amount of fuel vapor being fed by the purge valve to the intake passage in response to the fuel vapor concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.