Annex 2 Gear selection and shift point determination for vehicles equipped with manual transmissions 1. General approach 1.1. The shifting procedures described in this Annex shall apply to vehicles equipped with manual and semi-automatic transmissions. 1.2. The prescribed gears and shifting points are based on the balance between the power required to overcome driving resistance and acceleration, and the power provided by the engine in all possible gears at a specific cycle phase. 1.3. The calculation to determine the gears to use shall be based on normalised engine speeds (normalised to the span between idling speed and rated engine speed) and normalised full load power curves (normalised to rated power) versus normalised engine speed. 1.4. This annex shall not apply to vehicles tested according to Annex 8.. 2. Required data The following data is required to calculate the gears to be used when driving the cycle on a chassis dynamometer: (a) , the maximum rated engine power as declared by the manufacturer; (b) , the rated engine speed at which an engine develops its maximum power. If the maximum power is developed over an engine speed range, s is determined by the mean of this range; (c) , idling speed as defined of Annex 1; (d) , the number of forward gears; (e) , minimum engine speed for gears when the vehicle is in motion. The minimum value is determined by the following equation: (1) Higher values may be used if requested by the manufacturer; (f) , the ratio obtained by dividing n in min-1 by v in km/h for each gear , to ; (g) , test mass of the vehicle in kg; (h) , , , driving resistance coefficients as defined of Annex 4 in N, N/(km/h), and N/(km/h)² respectively; (i) is the full load power curve, normalised to rated power and (rated engine speed idling speed), where . – 3. Calculations of required power, engine speeds, available power, and possible gear to be used 3.1. Calculation of required power For every second of the cycle trace, the power required to overcome driving resistance and to accelerate shall be calculated using the following equation:
Annex 2 Gear selection and shift point determination for vehicles equipped with manual transmissions 1. General approach 1.1. The shifting procedures described in this Annex shall apply to vehicles equipped with manual and semi-automatic transmissions. 1.2. The prescribed gears and shifting points are based on the balance between the power required to overcome driving resistance and acceleration, and the power provided by the engine in all possible gears at a specific cycle phase. 1.3. The calculation to determine the gears to use shall be based on normalised engine speeds (normalised to the span between idling speed and rated engine speed) and normalised full load power curves (normalised to rated power) versus normalised engine speed. 1.4. This annex shall not apply to vehicles tested according to Annex 8.. 2. Required data The following data is required to calculate the gears to be used when driving the cycle on a chassis dynamometer: (a) , the maximum rated engine power as declared by the manufacturer; (b) , the rated engine speed at which an engine develops its maximum power. If the maximum power is developed over an engine speed range, s is determined by the mean of this range; (c) , idling speed as defined of Annex 1; (d) , the number of forward gears; (e) , minimum engine speed for gears when the vehicle is in motion. The minimum value is determined by the following equation: (1) Higher values may be used if requested by the manufacturer; (f) , the ratio obtained by dividing n in min-1 by v in km/h for each gear , to ; (g) , test mass of the vehicle in kg; (h) , , , driving resistance coefficients as defined of Annex 4 in N, N/(km/h), and N/(km/h)² respectively; (i) is the full load power curve, normalised to rated power and (rated engine speed – idling speed), where . 3. Calculations of required power, engine speeds, available power, and possible gear to be used 3.1. Calculation of required power For every second of the cycle trace, the power required to overcome driving resistance and to accelerate shall be calculated using the following equation:
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