SAE J1343_200008

The objective of this report is to provide information that may be used in obtaining an average power per duty cycle for truck and bus engine accessories. The accessory components covered by this information report include: air brake compressors, alternators, air conditioning compressors, engine cooling fans and drives, and power steering pumps. The values show an estimate of the average power requirements of known duty cycles of these engine drive accessories.

This report does not address loads required for engine operation. Required systems include those needed for engine performance such as fuel pumps and electronic control modules (ECM).