Engine oil temperature transient is specified as 127 °C (5 min) with N1 at which approximate value?

Engine oil temperature transient is specified as 127 °C (5 min) with N1 at which approximate value?

• A. 125 °C (5 min with N1 at 60±1%)
• B. 126 °C (5 min with N1 at 62±1%)
• C. 127 °C (5 min with N1 at 61±1%)
• D. 128 °C (5 min with N1 at 63±1%)

Answer: (C)

Engine oil temperature in this transient test is driven by engine speed, N1. The target of 127 °C after 5 minutes corresponds to a specific N1 value. The calibration data show that to reach 127 °C in 5 minutes you set N1 to about 61%, with a tolerance of ±1%. If you use 60%, you get around 125 °C, and at 63% you’re around 128 °C. So the value that matches the 127 °C target is N1 roughly 61% (61 ± 1%).

Engine oil temperature in this transient test is driven by engine speed, N1. The target of 127 °C after 5 minutes corresponds to a specific N1 value. The calibration data show that to reach 127 °C in 5 minutes you set N1 to about 61%, with a tolerance of ±1%. If you use 60%, you get around 125 °C, and at 63% you’re around 128 °C. So the value that matches the 127 °C target is N1 roughly 61% (61 ± 1%).