Battery current during engine start
I was a bit curious how much current is pulled during my 5-cylinder diesel start. It's more than I thought. Just before the 8 sec mark the ignition is turned on. The glow plugs pull over 100...
Forum Discussion
LScamper wrote:
" I'd guess that the ripple there is more due to the starter motor hitting up against a compression stroke on the engine. That would also explain why each successive peak is a little less severe, as the engine gains momentum."
X2.
The first peak do to starter turning engine from dead stop. Like locked rotor current.
Amount of energy to overcome all that inertia, heavy diesel pistons, crank and flywheel is massive.
Once turning and getting up to speed on 2, 3rd, 4th and perhaps 5 piston compression stroke, a full 720 degrees, so all crank angle sensors have been measured by Hall effect sensors on the flywheel, the common rail injection system then fires fuel to light things off. But it has to get ignition timing bearings first from all 5 cylinders, before doing so.
What kind of MPG's do you see in your Sprinter Van? Speed traveled on interstate?
