BS EN ISO 5165:2020
$142.49
Petroleum products. Determination of the ignition quality of diesel fuels. Cetane engine method
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 28 |
This document establishes the rating of diesel fuel oil in terms of an arbitrary scale of cetane numbers (CNs) using a standard single cylinder, four-stroke cycle, variable compression ratio, indirect injected diesel engine. The CN provides a measure of the ignition characteristics of diesel fuel oil in compression ignition engines. The CN is determined at constant speed in a pre-combustion chamber-type compression ignition test engine. However, the relationship of test engine performance to full scale, variable speed and variable load engines is not completely understood.
This document is applicable for the entire scale range from 0 CN to 100 CN but typical testing is in the range of 30 CN to 65 CN. An interlaboratory study executed by CEN in 2013 (10 samples in the range 52,4 CN to 73,8 CN)[ 3] confirmed that paraffinic diesel from synthesis or hydrotreatment, containing up to a volume fraction of 7 % fatty acid methyl ester (FAME), can be tested by this test method and that the precision is comparable to conventional fuels.
This test can be used for unconventional fuels such as synthetics or vegetable oils. However, the precision for those fuels has not been established and the relationship to the performance of such materials in full-scale engines is not completely understood.
Samples with fluid properties that interfere with the gravity flow of fuel to the fuel pump or delivery through the injector nozzle are not suitable for rating by this method.
This document specifies operating conditions in SI units but engine measurements are specified in inch-pound units or Fahrenheit because these are the historical units used in the manufacture of the equipment, and thus some references in this document include these and other non-SI units in parenthesis.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | European foreword Endorsement notice |
| 7 | Foreword |
| 8 | 1 Scope 2 Normative references |
| 9 | 3 Terms and definitions |
| 10 | 4 Principle |
| 11 | 5 Reagents and reference materials |
| 12 | 6 Apparatus 6.1 Test engine assembly 6.2 Instrumentation |
| 14 | 6.3 Reference fuels dispensing equipment 6.4 Injector nozzle tester |
| 15 | 6.5 Special maintenance tools 7 Sampling and sample preparation 8 Basic engine and instrument settings and standard operating conditions 8.1 Installation of engine equipment and instrumentation 8.2 Engine speed 8.3 Valve timing |
| 16 | 8.4 Valve lift 8.5 Fuel pump timing 8.6 Fuel pump inlet pressure 8.7 Direction of engine rotation 8.8 Injection timing 8.9 Injector nozzle opening pressure 8.10 Injection flow rate 8.11 Injector coolant passage temperature 8.12 Valve clearances 8.13 Oil pressure 8.14 Oil temperature |
| 17 | 8.15 Cylinder jacket coolant temperature 8.16 Intake air temperature 8.17 Basic ignition delay 8.18 Cylinder jacket coolant level 8.19 Engine-crankcase lubricating oil level 8.20 Crankcase internal pressure 8.21 Exhaust back-pressure 8.22 Exhaust and crankcase breather system resonance 8.23 Piston over-travel 8.24 Belt tension |
| 18 | 8.25 Injector opening or release pressure 8.26 Injector spray pattern 8.27 Indexing handwheel reading 8.27.1 General 8.27.2 Basic setting of variable compression plug 8.27.3 Setting handwheel micrometer drum and scale 8.27.4 Setting handwheel reading |
| 19 | 8.28 Basic compression pressure 8.29 Fuel pump lubricating oil level 8.30 Fuel pump timing gear-box oil level |
| 20 | 8.31 Setting instrumentation reference pickups 8.32 Setting injector pickup gap 9 Engine qualification 9.1 Engine conformity 9.2 Checking performance on check fuels 9.3 Check in the case of nonconformity |
| 21 | 10 Procedure 10.1 General 10.2 Sample introduction 10.3 Fuel flow rate 10.4 Fuel injection timing 10.5 Ignition delay 10.6 Equilibration 10.7 Handwheel reading 10.8 Reference fuel no. 1 |
| 22 | 10.9 Reference fuel no. 2 |
| 23 | 10.10 Number of blends of reference fuels 10.11 Repeat readings 11 Calculation |
| 25 | 12 Expression of results 13 Precision 13.1 General 13.2 Repeatability, r 13.3 Reproducibility, R 13.4 Precision basis |
| 26 | 14 Test report |
| 27 | Bibliography |
