Description / Abstract:
This document covers evaluation techniques for determining the
power consumption characteristics of engine driven hydraulic pumps
used on heavy-duty trucks and buses. The testing technique outlined
in this SAE Recommended Practice was developed as part of an
overall program for testing and evaluating fuel consumption of
heavy-duty trucks and buses. The technique outlined in this
document provides a description of the test to be run to determine
power consumption of these engine driven components, the type of
equipment and facilities which are generally required to perform
these tests are discussed in SAE J745. It is recommended that the
specific operating conditions suggested throughout the test be
carefully reviewed on the basis of actual data obtained on the
specific vehicle operation.
Purpose
The purpose of this document is to expand on the scope of the
existing SAE J745. All of the specifications and apparatus utilized
in that document for construction and industrial machinery can be
utilized in this procedure. Information presented in the manner
outlined as follows can be used to compare the hydraulic power
requirements of fixed or variable-displacement pumps and estimate
actual power consumption after the vehicle duty cycle has been
determined.