| 摘要 |
In a method for determining a correction value lambdak for the lambda center position lambdam which is specified in the control of the air/fuel ratio which is force-modulated between a first lean lambda value lambda1 and a second rich lambda value lambda2 and supplied to an internal combustion engine or a catalyst, using the signal from a binary jump sensor downstream from a catalyst volume, and whenever the jump sensor signal Ulambda jumps from "lean" to "rich" or from "rich" to "lean" the air/fuel ratio is switched back and forth between the lean lambda value lambda1 and the rich lambda value lambda2, it is proposed that the time period between two signal jumps Ulambda, which indicates the residence time T1 in the lean phase or the residence time T2 in the rich phase, is determined, and the correction value lambdak is determined from the first lean lambda value lambda1, the second rich lambda value lambda2, the first residence time T1, and the second residence time T2. According to the proposal, a particularly simple yet accurate method is provided for determining the correction value lambdak for the lambda center position lambdam.
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