Method for determining a correction value for the lambda...

Details Method for determining a correction value for the lambda... Method for determining a correction value for the lambda...

2011-01-25

2011-01-25

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Exhaust system

C073S023320

Reexamination Certificate

active

07874204

ABSTRACT:
In a method for determining a correction value λk for the lambda center position λm which is specified in the control of the air/fuel ratio which is force-modulated between a first lean lambda value λ1and a second rich lambda value λ2and 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 Uλ jumps from “lean” to “rich” or from “rich” to “lean” the air/fuel ratio is switched back and forth between the lean lambda value λ1and the rich lambda value λ2, it is proposed that the time period between two signal jumps Uλ, which indicates the residence time T1in the lean phase or the residence time T2in the rich phase, is determined, and the correction value λk is determined from the first lean lambda value λ1, the second rich lambda value λ2, 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 λk for the lambda center position λm.

REFERENCES:
patent: 5323635 (1994-06-01), Ueno et al.
patent: 7725280 (2010-05-01), Odendall
patent: 2010/0037683 (2010-02-01), Barnikow et al.

Affiliated with

Also associated with

Rating

Method for determining a correction value for the lambda... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for determining a correction value for the lambda..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining a correction value for the lambda... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2619995