Standard
AS 4594.9-1999
[Withdrawn]Internal combustion engines — Performance, Part 9: Engines for road vehicle use — Test code, gross power
Specifies a method for testing internal combustion engines for propulsion of road vehicles. It is applicable to the evaluation of their performance with a view to presenting curves of power and specific fuel consumption at full load as a function of engine speed. This Standard is identical with and has been reproduced from ISO 2534:1998.
Published: 05/08/1999
Pages: 29
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Definitions
4 Accuracy of measuring equipment and instruments
4.1 Torque
4.2 Engine speed (rotational frequency)
4.3 Fuel flow
4.4 Fuel temperature
4.5 Air temperature
4.6 Barometric pressure
4.7 Back pressure in exhaust system
4.8 Depression in inlet system
4.9 Absolute pressure in inlet duct
5 Tests
5.1 Auxiliaries
5.1.1 Auxiliaries to be fitted
5.1.2 Auxiliaries to be removed
5.1.3 Compression-ignition engine starting auxiliaries
5.2 Setting conditions
5.3 Test conditions
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.3.10
5.3.11
5.3.12
5.3.13
5.3.14
5.4 Test procedure
5.5 Data to be recorded
6 Power correction factors
6.1 Definition of factor α for power correction
6.2 Atmospheric conditions
6.2.1 Reference atmospheric conditions
6.2.1.1 Temperature
6.2.1.2 Dry pressure
6.2.2 Test atmospheric conditions
6.2.2.1 Temperature, T
6.2.2.2 Dry pressure, pd
6.3 Determination of power correction factors
6.3.1 Naturally aspirated and pressure-charged spark-ignition engines — Factor αa
6.3.2 Compression-ignition engines — Factor αc
6.3.2.1 Atmospheric factor, fa
6.3.2.2 Engine factor, fm
6.3.2.3 Limitation in use of correction formula
6.3.3 Other types of engine
7 Measurement of and correction for smoke value for compression-ignition engines
7.1 Correction factor for light absorption coefficient of smoke
7.2 Determination of correction factor for light absorption coefficient of smoke
7.3 Limits of application
8 Test report
8.1 Compression-ignition engines — Essential characteristics7)
8.1.1 Description of engine
8.1.2 Cooling system
8.1.3 Temperatures specified by the manufacturer
8.1.4 Pressure charger:with/without10)
8.1.5 Inlet system
8.1.6 Additional smoke control devices (if any, and if not covered by another heading)
8.1.7 Fuel feed system
8.1.8 Valve timing
8.1.9 Exhaust system
8.1.10 Lubrication system
8.1.11 Electrical equipment
8.1.12 Other engine-driven equipment
8.2 Spark-ignition engines — Essential characteristics17)
8.2.1 Description of engine
8.2.2 Cooling system
8.2.3 Temperature specified by the manufacturer
8.2.4 Pressure charger: with/without20)
8.2.5 Inlet system
8.2.6 Additional anti-pollution devices (if any, and if not covered by another heading)
8.2.7 Fuel feed system
8.2.8 Valve timing
8.2.9 Ignition system
8.2.10 Exhaust system
8.2.11 Lubrication system
8.2.12 Electrical equipment
8.2.13 Other auxiliaries fitted to engine
8.3 Test conditions for measuring engine gross power
8.4 Statement of results as function of engine speed29)
9 Verification of engine performance
9.1 Designation
9.2 Notation
9.2.1 Declared gross power and corresponding engine speed (range)
9.2.2 Declared gross torque and corresponding engine speed (range)
9.2.3 Declared specific fuel consumption and corresponding engine speed (range)
9.3 Tolerances
9.3.1 Declared values
9.3.1.1 Power
9.3.1.1.1 Declared single maximum power engine speed, np
9.3.1.1.2 Declared maximum power engine speed range, (np1 − np2)
9.3.1.2 Torque
9.3.1.2.1 Declared single maximum torque engine speed, nT
9.3.1.2.2 Declared maximum torque engine speed range, (nT1 − nT2)
9.3.1.3 Specific fuel consumption
9.3.1.4 Numerical tolerances
Cited references in this standard
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