SGII shows best acceleration load

[ever_green]

Originally Posted by sendler

Where do you read what the load is on that chart?

NM is measurement of torque. some graphs use torque instead of engine load which is basically the same thing. the top boundary of the coloured area is the torque curve. 1NZ-FXE makes about 110nm at 4000rpm, so you can say 90% load is 99nm torque (0.9x110).

[sendler]

Still doesn't make sense. Is there a torque curve posted? How do we know what the load is at 1500 rpm and 76 nm.

[ever_green]

Originally Posted by sendler

Still doesn't make sense. Is there a torque curve posted? How do we know what the load is at 1500 rpm and 76 nm.

95% because engine is making max 80nm of torque at 1500. sorry could not find a better graph :\

[SentraSE-R]

Originally Posted by ever_green

this should help


seems biggest concentration of optimum efficiency points are at ~1600rpm around 90% load. although not exactly your engine it is very close.

I think the Prius 1.5 engine is an Atkinson-cycle version of the Otto-cycle 1NZ-FE engine in the Scion xA/xB, Toyota Yaris/Echo/Tercel/Paseo, etc. Thanks!

The BFSC map does confirm my 1500-2200 rpm, 83%-90% load acceleration parameters.

[mikeyjd]

Great work Sentra!

[Retardosaurus]

Originally Posted by ever_green

NM is measurement of torque. some graphs use torque instead of engine load which is basically the same thing. the top boundary of the coloured area is the torque curve. 1NZ-FXE makes about 110nm at 4000rpm, so you can say 90% load is 99nm torque (0.9x110).

Isnt engine load the power usage?: actual kW / max kW ?

kW = Nm x RPM / 9550

Very nice thread! Thanks for the results!