SAE J643 (AUG2023)

Current Revision
Hydrodynamic Drive Test Code

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SAE J643 (AUG2023)

Hydrodynamic Drive Test Code

PUBLISH DATE 2023
PAGES 10
SAE J643 (AUG2023)

The range of test conditions on the dynamometer shall be sufficient to determine the primary operating characteristics corresponding to the full range of vehicle operations.

The characteristics to be determined are:

  • a Torque ratio versus speed ratio and output speed
  • b Input speed versus speed ratio and output speed
  • c Efficiency versus speed ratio and output speed
  • d Capacity factor versus speed ratio and output speed
  • e Input torque versus input speed

NOTE: For more information about these characteristics and the design of hydrodynamic drives, refer to β€œDesign Practices: Passenger Car Automatic Transmissions,” SAE Advances in Engineering, AE-18 (Third Ed.) or AE-29 (Fourth Ed.).

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