Method and apparatus for sensing air flow into a cylinder of internal combustion engine and method and apparatus for controlling fuel of the internal combustion engine arranged to use the method and apparatus
US5555870A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Apr 19, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0402
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and an apparatus for sensing an air flow into a cylinder of an internal combustion engine are arranged to determine a number of revolutions of the engine, determine a pressure of an intake pipe of the engine, and calculate an air flow Qc into a cylinder of the engine, based on the number of revolutions and the pressure of the intake pipe by the linear expression of Qc=.alpha.P+.beta., in which .alpha. is a coefficient indicating a gradient of a linear expression and defined according to the number of revolutions, .beta. is a coefficient indicating an offset value and defined according to the number of revolutions, and P is a pressure of the intake pipe. The method and the apparatus for controlling fuel of the internal combustion engine operate to generate a fuel flow signal according to the air flow into the cylinder determined by the above method and feed fuel to the internal combustion engine at a flow rate corresponding to a fuel flow signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.