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Old 01-29-2014, 08:36 AM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
OM616/7 Electronic Idle Control

Morning Everyone,

Our one 300SD does not really enjoy idling on first start up in these cold temperatures. You have the throttle up in order to keep the engine from stalling out. I might have the wrong oil for these temps in there but I can't remember at the moment.

Currently there's no benefit from starting the car and letting it run for a bit to get some heat in the cabin as the driver has to sit there and hold the pedal for a bit before its even stable and at that point might as well drive off in a lower gear and heat it up.

So I was thinking, is there a way I can do this electronically. It would be nice to just have a knob in the cabin to set the idle speed. Since the 617 is a purely mechanical design there's no electronic device like the ELR on 602. Aside from a mechanical "hold" cable there's nothing to use..

OR IS THERE?!

When it warms up a bit I plan on experimenting with using the cruise control system as an idle controller. Certain safety mechanisms would be designed as well but the general idea of operation would be, hold pedal to desired RPM, up tick cruise switch to hold.

What do you guys think of this approach?
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