Here's a thought - why couldn't you alter the slot (window) widths in the crank hub like so: slot #1 leave alone; #2 make slightly wider; #3 wider yet. Now program the ECM to differentiate between the "angularity" of the slots (according to width) and determine from that information, when #1 cylinder is at TDC, thus eliminating the cam sensor?
Possible method to eliminate cam sensor?
- Thread starter S10xGN
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One problem with that is the cam sensor runs half engine speed, so the same slot would show up twice for each cam signal. The GEN II system found on 3800 engines has exactly that setup you're suggesting, but for a different reason. It looks at individual spark processing and uses the variable window to determine exact crank position. In addition, there is another crank signal, one for 3x, another for 18x. The two signals overlap and the ECU can then provide more exact control and data logging. The added feature to the GEN II system is the ability to spark immediately when the engine is cranked - unlike our GEN I CCCI systems that requre a cam signal PLUS crank signal to initiate spark. This is why the series II 3800 engines start so easily compared to our 3.8's that may take as many as two full revolutions of the engine to start.
-John Spina
http://www.casperselectronic.com
-John Spina
http://www.casperselectronic.com
John, thanks for cinching up my belt before my pants fell off!
