40 C.F.R. § 1036 app B of Part 1036

Current through October 31, 2024
Appendix B of Part 1036 - Transient Duty Cycles

(a) This appendix specifies transient test intervals and duty cycles for the engine and powertrain testing described in §§ 1036.512 and 1036.514 , as follows:

(1) The transient test intervals and duty cycle for testing engines involves a schedule of normalized engine speed and torque values.

(2) The transient test intervals and duty cycles for powertrain testing involves a schedule of vehicle speeds and road grade. Determine road grade at each point based on the peak rated power of the powertrain system, Prated, determined in § 1036.520 and road grade coefficients using the following equation: Road grade = a ·P2rated + b·Prated + c

(3) The operating schedules in this appendix in some cases eliminate repetitive information by omitting 1 Hz records where there is no change in values. Perform testing by continuing to operate at the last specified values until the operating schedule shows a change in values. The official operating schedule for testing, cycle validation, and other purposes includes both the specified and omitted values.

(b) The following transient test interval applies for spark-ignition engines and powertrains when testing over the duty cycle specified in § 1036.512 :

Table 1 of Appendix B-Transient Test Interval for Spark-Ignition Engines and Powertrains Under § 1036.512

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(c) The following transient test interval applies for compression-ignition engines and powertrains when testing over the duty cycle specified in § 1036.512 :

Table 2 of Appendix B-Transient Test Interval for Compression-Ignition Engines and Powertrains Under § 1036.512

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(d) The following transient duty cycle applies for compression-ignition engines and powertrains when testing under § 1036.514 :

Table 3 of Appendix B-Transient Duty Cycle for Compression-Ignition Engines and Powertrains Under § 1036.514

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40 C.F.R. 1036 app B of Part 1036

88 FR 4487 , 3/27/2023