|
BSFC is an interesting thing with modern common-rail diesels. My theory is best FE for accelleration is right on peak torque (for any engine). That is when the fuel rate is doing it's greatest work.
If a person could have a CVT style transmission and have the diesel run at peak torque for accel, that would be optimum. Of course, on a diesel, peak torque is very low in the powerband. That would be one reason why granny acceleration wourd return better real world results.
For steady-state cruising in a diesel, the lower the fuel rate (throttle pedal in this case) the better. However that does not necessarily mean that lower engine RPM is always better, depends heavily on the gearing of the trans and final drive.
|