| 摘要 |
A method is proposed for measuring the pulsating air mass aspirated by an internal combustion engine in a flow cross section. To this end, an upper reference value (Uor) is determined from the rpm of the engine, above which value a reversed flow of the air takes place, and an actual flowthrough measurement value (Us) furnished by a flowthrough measuring device is compared with this upper reference value (Uor). Upon the attainment of the upper reference value (Uor) by the actual flowthrough measurement value (Us), a time period (tr) begins to run, which ends whenever the actual flowthrough measurement value (Us) has again dropped down to the upper reference value (Uor). The time period (tr) is stored in memory and serves in such a manner to correct the flowthrough measurement value (Us) upon the occurrence of reversed flow that the polarity of the actual flowthrough measurement value (Us) is reversed, at the most for the time period (tr), whenever the actual flowthrough measurement value (Us) attains a predetermined lower reference value (Uur , Usmin).
|
