|
You ask how does the crank sensor prevent starting?
Simply put, no sensor = no spark. The ECU is set to not operate the fuel pumps with no spark. Prevents flooding and is a safety thing, too.
Think about how the ignition system knows when to create a high voltage (40,000 volts) pulse at just the right time to go from the coil to the distributor and then from the distributor to the correct cylinder? And the "right time" can vary according to engine load and whether it is accelerating.
All internal combustion car engines have this need, Model T to the newest. Even a Diesel engine, although they use different system since Rudolph Diesel's invention uses no spark plugs.
That crank sensor tells the Ignition Control Module (ICM) the position of the crankshaft so that the ICN can make the high voltage pulse fire the right spark plug at just the right time.
Cars without a crank sensor have another way of doing this. Cars before on board comupters did it a different way. I started with a '47 Chevvy and it had a way to do it, too.
Today's lesson. Wasn't that easy?? Hope it didn't seem condescending.
Regards,
Bob
:>)
|
