[s60user]

I have a series 60 14.0 L engine in an application that is not delivering full power. I am able to measure the drive output delivered to the ground directly and also look at the engine torque % from the ECM but it seems that the engine never produces more than 65% of rated torque.

My question if I say simulated the boost pressure sensot to "fool" the ECM into mapping the injectors for full pressure will the ECM also limit the output because it "thinks" the engine is overloaded?

My application requires the engine to quickly deliver full power. Would some sort of direct air injection into the the manifold make sense?

How does the % torque that the ECM spits out get calculated? Is it based on the peak torque of the engine or the available torque at the the engine RPM?

 

[Gone Fishen]

One of our applications simular to this would be a gen set. The computer needs to see the amount of available boost pressure to allow the correct amount of fuel delivered. Interwting enough I had a customer who swore up and down that the engine was not 'putting out'. He loaded the engine up and like you the load factor was 62%. The engine was just coasting along at 62% load because that all it needed to maintain 1800 rpm. However a genset uses the VS governor while an automotive application uses the ls governor. Why would the engine want to get 100% load if it was not needed to do and maintain the job asked it to do. I run the trucks on the dyno and I drop down to 1300 rpm and maintain the load at that rpm. Trust me the load factor is 100% UNLESS something is out of wack like coolant temperature, air inlet temperature, or other factor causing a possible engine damage/sensor problem. On an automotive application max torque will NOT be obtained because the engine is set to give torque at rpm's below 1700 rpm. That is a highway application, if you had a 'jet start' app;ication where it was to maintain say 30 psi out the tunnel, it would seek 30 psi and allow the engine to find the correct rpm needed to maintain the 30 psi. Same way with a fire truck, maintaining 100 psi at the pump is a must regardless of rpm needed. the factor limiting these functions is the top rpm programmed in the engine computer

 

[DieselSVT]

Just out of curiosity what kind of application is the engine in?

10-4 on what gone fishen said again.......65% is all it needs to do whats asked of it.