Title: Engine crankshaft position recognition and tracking method applicable to cam and crankshaft signals with arbitrary patterns
Application Number: 200580009884 Application Date: 2005.03.28
Publication Number: 1961319 Publication Date: 2007.05.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G06F19/00;G06G7/70
Applicant(s) Name: Southwest Res Inst Address:
Inventor(s) Name: Wang Junmin;Sarlashkar Jayant V.
Attorney & Agent: chenwei
Abstract:
    A method and system for providing data representing crankshaft position. For each rising edge of the crankshaft signal, a position value and a factor value are stored in a look-up table. Cam and crankshaft signals are used to locate an initial crankshaft position. This initial position value is used as a pointer to the look-up table, and incremented with each rising pulse of the crankshaft signal. Data from the table is used to extrapolate crankshaft position from crankshaft signal values to a desired resolution in degree angle units.
Time: 8