Cummins 1991 N14 Heavy Duty Engine Operating Curve
1. Peak Torque (N•m [ft-lb]) – Maximum torque that the engine will produce. Also, sometimes referred to as COMMAND TORQUE. This is listed on the engine data plate.
2. Peak Torque RPM (RPM) – Engine speed at which peak torque is generated. This is listed on the engine data plate.
3. Maximum HP RPM (RPM) – Engine speed at which maximum power is developed. This is listed with Advertised Horsepower on the engine data plate.
4. Advertised Horsepower (HP) – Maximum power that the engine will develop. This is provided on the engine data plate with its corresponding engine speed.
5. Command Range (RPM) – The engine’s operating range from COMMAND TORQUE or Peak Torque up to the engine’s governed speed.
6. COMMAND Point – The point on the performance curve where maximum horsepower and optimum fuel economy come together. This is the point where Advertised Horsepower occurs.
7. Full Load Governed Speed (RPM) – Defined as the upper end of the engine’s full load operating range. This is listed on the engine data plate.
8. No-Load Governed Speed (RPM) – (not shown) Maximum unloaded engine speed.
This value is listed on the engine data sheet and in the FPEPS publications.