Max Compression Ratio

Terry Burtz said:
Brent, I'm happy that we agree.
My problem is that I don't understand 10-uh-C humor.
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Ohh OK. Well typically when someone puts some type of funny symbol ( :D
ROFL.gif
LOL.gif
etc. ) beside their comment, it typically means they intend for their comment to be taken as humorous.
 
johnneilson said:
ummmm, some sensors are hall effect, most are not, just magnetic.

crankshaft position sensor just reports pulses to ECU, and gap, usually at TDC.
if engine has only crank sensor, it fires plugs every revolution
if engine has cam position in addition to crank plugs fire in sequence
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The 'hall effect" is the name for a magnetic pulses impact on current flow.All magnetic switches work on this principal.The beauty of it is precision,you can accurately measure shaft position at any speed,its why electronic based ignition systems work so well.As an old fossil I dont care for 0 to 5v controlling my destiny,I prefer gears and breaker switches..as an old mechanic I love plugging in a box,pulling a code and changing a part,it gets you home faster:)
 
Railcar,

close, but no. Hall effect sensors are amplified to increase the magnetic inductive signal up to 5v. These require 3 wires, one for powering the amp.
Most position sensors are 2 wire, magnetic inductive type only.

BTW, there are several cam position sensors that are optical LED.

John
 
Either can bus or magnetic pulse both use the hall effect. I have alot of respect for your knowledge base.Hell the reason we are here is to avoid the temple of the screaming electron,not argue about it.The merits of the computer on the design and function of the internal combustion engine is undisputable,that doesnt mean I have to accept it..
 
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