Division 7.7.2 Generation of NRTC & LSI-NRTC speed and load for each test point (denormalization)

This point shall be used to generate the corresponding engine speeds and loads over which the engine shall be operated during NRTC or LSI-NRTC tests. Appendix 3 of Annex XVII defines applicable test cycles in a normalized format. A normalized test cycle consists of a sequence of paired values for speed and torque %.

Normalized values of speed and torque shall be transformed using the following conventions:

1. (a)

   The normalized speed shall be transformed into a sequence of reference speeds, n _ref, in accordance with point 7.7.2.2;

2. (b)

   The normalized torque is expressed as a percentage of the mapped torque from the curve generated according to point 7.6.2 at the corresponding reference speed. These normalized values shall be transformed into a sequence of reference torques, T _ref, according to point 7.7.2.3;

3. (c)

   The reference speed and reference torque values expressed in coherent units are multiplied to calculate the reference power values.