What was the function of ignition timing advance?
What was the function of ignition timing advance?
Ignition timing advance was handled mechanically via a vacuum diaphragm and/or centrifugal weights. When GM introduced the engine computer in the early 80’s, the function of timing advance was handled electronically instead of mechanically.
Why does the cam sensor not send a signal to the ignition coil?
Since, the Ignition Control Module really doesn’t send a physical signal (like the Crank or Cam Sensor does to the Switching Device) to the Ignition Coil (s). Why? Well, because the term ‘Switching Signal’ is just a descriptive name for the turning on and off of the primary current passing thru’ the Ignition Coil.
When does the 5 volt signal go to the ignition module?
When the ECM sees the engine RPM go above a preset level (usually 400rpm), it considers the engine to be running and supplies a 5 volt signal which goes to the bypass circuit in the ignition module. When this happens, the ignition timing advance function is transferred from the ignition module to the ECM.
Which is the triggering signal for the crank sensor?
Since the Crank Sensor (or Cam Sensor) is the one producing this Triggering Signal; I refer to it as the Triggering Device. First of all the signal that the Ignition Module (or Fuel Injection Computer) sends the Ignition Coil for it to start sparking is the Switching Signal.
Why is ignition timing important in an engine?
by Don Bowman. Ignition timing refers to the point at which the spark plugs ignite the fuel within an engine’s cylinder. Proper timing is all-important to the thermo-efficiency of the engine. The first thing to keep in mind is that fuel burns at a certain rate in an engine regardless of the rpm.
Since, the Ignition Control Module really doesn’t send a physical signal (like the Crank or Cam Sensor does to the Switching Device) to the Ignition Coil (s). Why? Well, because the term ‘Switching Signal’ is just a descriptive name for the turning on and off of the primary current passing thru’ the Ignition Coil.
Since the Crank Sensor (or Cam Sensor) is the one producing this Triggering Signal; I refer to it as the Triggering Device. First of all the signal that the Ignition Module (or Fuel Injection Computer) sends the Ignition Coil for it to start sparking is the Switching Signal.
Is the ignition control module the switching device?
So, guess what… the Ignition Module (or the Fuel Injection Computer) is therefore the Switching Device. Since, the Ignition Control Module really doesn’t send a physical signal (like the Crank or Cam Sensor does to the Switching Device) to the Ignition Coil (s).
