looking for engine run wire
looking for engine run wire
(OP)
Im looking for all makes of cars vans and truck engine run wires. To give a true reading of engine run time, Rather than just ignition feed.Does anyone know where this could be found please.





RE: looking for engine run wire
Mike Halloran
Pembroke Pines, FL, USA
RE: looking for engine run wire
RE: looking for engine run wire
Also agree with thruthefence, oil pressure is a reliable indicator of "engine run." But in many cases, you may be able to just monitor the factory oil pressure switch -- its terminal goes to ground when the engine runs, unless it's a bus (communicating) device or an analog sensor. Keep your input impedance high in any case.
Let us know what you decide to do!
Good on ya,
Goober Dave
RE: looking for engine run wire
RE: looking for engine run wire
Dan - Owner

http://www.Hi-TecDesigns.com
RE: looking for engine run wire
thanks for the ideas
RE: looking for engine run wire
Dan - Owner

http://www.Hi-TecDesigns.com
RE: looking for engine run wire
RE: looking for engine run wire
RE: looking for engine run wire
Dan - Owner

http://www.Hi-TecDesigns.com
RE: looking for engine run wire
Oil pressure
Alternator charging?
Tacho signal.
Manifold vacuum.
Crank position sensor.
Spar firing.
Car moving.
Speedo
Speed sensor.
ABS signal.
Traction control signal.
Dynamic control signal.
GPS signal.
Do you need any more?
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers for professional engineers
RE: looking for engine run wire
Here is an example of a product using this circuit design.. http://www.chargeguard.com/product_new.php Per installation instructions and good practices for heavy draw radio equipment, these devices are powered directly off the vehicle battery via an appropriately fused direct connection.
These are used extensively in emergency service vehicles to power mobile radios and other equipment that needs to operate in ignition off conditions, yet automatically shut down the equipment after a user selected amount of ignition off time to save the battery..
I have one of these installed in one of my vehicles. Per documentation, the unit I have monitors not only voltage level (which would be fooled by external chargers) but also monitors the AC noise profile of the running alternator for more accurate determination of actual engine run..
I also use "battery minder" type chargers on this vehicle due to long vehicle idle periods and also due to increased parasitic draw of some additional onboard equipment. On rare occasions the charger will keep the charge guard triggered, but it is very rare..
If you are trying to implement a totally self contained monitor device without additional wires to oil pressure sensors, etc. you might look into the design these devices use. You might get some insight from reading the abstracts of the patents listed...