EN 16715:2015
(Main)Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels - Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection
Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels - Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection
WARNING The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This European Standard specifies a test method for the quantitative determination of ignition and combustion delays of middle distillate fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation is given to calculate the derived cetane number (DCN) from the ignition and combustion delays determined from the dynamic pressure curve.
This standard is applicable to middle distillate fuels, fatty acid methyl esters (FAME) and blends of diesel fuels and FAME .The method is also applicable to middle distillate fuels of non-petroleum origin, oil-sands based fuels, blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives and low-sulfur diesel fuel oils. However, users applying this standard especially to unconventional distillate fuels are warned that the relationship between derived cetane number and combustion behaviour in real engines is not yet fully understood.
This standard covers the ignition delay range from 2,47 ms to 4,09 ms and combustion delay from 3,71 ms to 6,74 ms (67 DCN to 39 DCN).
NOTE 1 The combustion analyser can measure shorter or longer ignition and combustion delays, but precision is not known.
NOTE 2 There is no information about how DCNs outside the 67 to 39 range compares to EN ISO 5165.
NOTE 3 For the purpose of this European Standard, the expression (% (V/V)) is used to represent the volume fraction (φ), and (% (m/m)) the mass fraction (ω).
Flüssige Mineralölerzeugnisse - Bestimmung des Zündverzugs und der abgeleiteten Cetanzahl (ACZ) von Kraftstoffen aus Mitteldestillaten - Bestimmung des Zündverzugs und des Verbrennungsverzugs in einer Verbrennungskammer mit konstantem Volumen und direkter Kraftstoffeinspritzung
Diese Europäische Norm legt ein Prüfverfahren zur quantitativen Bestimmung des Zündverzugs und des Verbrennungsverzugs von Kraftstoffen aus Mitteldestillaten, die in Dieselmotoren eingesetzt werden, fest. Dieses Verfahren nutzt eine Verbrennungskammer mit konstantem Volumen mit direkter Kraftstoffeinspritzung in erwärmte und komprimierte synthetische Luft. Durch die Verbrennung des zu prüfenden Produkts wird eine dynamische Druckwelle erzeugt. Eine Gleichung zur Berechnung der abgeleiteten Cetanzahl (ACZ) mit den anhand der dynamischen Druckkurve ermittelten Werten für den Zünd- und den Verbrennungsverzug ist angegeben.
Diese Europäische Norm gilt für Mitteldestillatkraftstoffe, Fettsäuremethylester (FAME) sowie Gemische aus Dieselkraftstoffen und FAME. Das Verfahren ist ebenfalls anwendbar auf Mitteldestillatkraftstoffe nicht mineralölstämmiger Herkunft, auf ölsandbasierte Kraftstoffe, auf Biodieselmaterial enthaltende Kraftstoffmischungen, auf Dieselkraftstoffe, welche Zündverbesserer enthalten und auf schwefelarme Dieselkraftstoffe. Anwender, die diese Norm im Besonderen auf alternative Destillatkraftstoffe anwenden, werden jedoch darauf hingewiesen, dass die Beziehung zwischen der abgeleiteten Cetanzahl und dem Verbrennungsverhalten in realen Motoren noch nicht völlig geklärt ist.
Diese Norm umfasst den Zündverzugsbereich von 2,47 ms bis 4,09 ms und den Verbrennungsverzugsbereich von 3,71 ms bis 6,74 ms (ACZ 67 bis ACZ 39).
ANMERKUNG 1 Das Verbrennungsprüfgerät kann einen kürzeren oder längeren Zündverzug und Verbrennungsverzug messen, die Präzision ist jedoch nicht bekannt.
ANMERKUNG 2 Es liegen keine Angaben zur Vergleichbarkeit von ACZ außerhalb des Bereiches von 67 bis 39 mit EN ISO 5165 vor.
ANMERKUNG 3 Für die Anwendung dieser Europäischen Norm wird der Volumenanteil () mit „% (V/V)“ und der Massenanteil () mit „% (m/m)“ angegeben.
WARNUNG — Die Anwendung dieser Norm kann die Anwendung gefährlicher Stoffe, Arbeitsgänge und Geräte mit sich bringen. Diese Norm gibt nicht vor, alle mit ihrer Anwendung verbundenen Sicherheitsprobleme anzusprechen. Der Anwender dieser Norm ist dafür verantwortlich, vorher ange¬messene Maßnahmen in Hinblick auf den Arbeitsschutz einzuleiten und die Anwendbarkeit einschränkender Vorschriften zu ermitteln
Produits pétroliers liquides — Détermination du délai d'inflammation et de l'indice de cétane dérivé (ICD) des distillats moyens — Détermination du délai d'inflammation et de combustion en utilisant une chambre à volume constant avec injection direct du carburant
La présente Norme européenne prescrit une méthode d'essai pour la détermination quantitative des délais d’inflammation et de combustion des distillats moyens utilisés comme carburants dans les moteurs à allumage par compression. Elle utilise une chambre de combustion à volume constant avec injection directe de carburant dans de l'air synthétique comprimé et chauffé. Une onde de pression dynamique est générée par la combustion du produit soumis à l'essai. Une équation est donnée pour calculer l'indice de cétane dérivé (ICD) à partir des délais d’inflammation et de combustion déterminés à partir de la courbe de pression dynamique.
La présente Norme européenne s'applique aux distillats moyens, aux esters méthyliques d’acides gras (EMAG) et aux mélanges de carburants diesel et d'EMAG. Elle est également applicable aux distillats moyens d'origine non pétrolière, aux carburants produits à partir de sables asphaltiques, aux mélanges de carburants contenant des biodiesel, aux carburants diesel contenant des additifs améliorateurs de cétane et aux carburants diesel à faible teneur en soufre. Cependant, l'attention des utilisateurs de cette norme, en particulier lorsqu’elle est appliquée aux distillats combustibles non conventionnels, est attirée sur le fait que la relation entre l'indice de cétane dérivé et les phénomènes de combustion dans les moteurs n’est pas encore parfaitement comprise.
La présente Norme européenne couvre les délais d'inflammation compris entre 2,47 et 4,09 ms et les délais de combustion compris entre 3,71 et 6,74 ms (ICD compris entre 67 et 39).
NOTE 1 L’analyseur de combustion peut mesurer des délais d’inflammation et de combustion plus longs ou plus courts, mais la fidélité n’est pas connue.
NOTE 2 Il n’y a pas d’informations sur la comparabilité des ICD hors de la gamme comprise entre 67 et 39 avec les valeurs obtenues suivant l’EN ISO 5165.
NOTE 3 Pour les besoins de la présente Norme européenne, les expressions « % (V/V) » et « % (m/m) » représentent respectivement les fractions volumique (φ) et massique (ω).
NOTE Pour les besoins de la présente Norme européenne, les expressions « % (V/V) » et « % (m/m) » représentent respectivement les fractions volumique (φ) et massique (ω).
AVERTISSEMENT — L'utilisation de la présente Norme européenne peut impliquer l'intervention de produits, d'opérations et d'équipements à caractère dangereux. La présente Norme européenne n'est pas censée aborder tous les problèmes de sécurité concernés par son usage. Il est de la responsabilité de l'utilisateur de consulter et d'établir des règles de sécurité et d'hygiène appropriées et de déterminer l'applicabilité des restrictions réglementaires avant utilisation.
Tekoči naftni proizvodi - Ugotavljanje zakasnitve vžiga in izpeljanega cetanskega števila (DCN) v srednje destilatnih gorivih - Določevanje zakasnitve vžiga in sežiga z uporabo komore s konstantno prostornino z direktnim injiciranjem goriva
Ta evropski standard določa preskusno metodo za kvantitativno ugotavljanje zakasnitve vžiga v srednje destilatnih gorivih, namenjenih za uporabo v motorjih s kompresijskim vžigom. Pri tej metodi se uporablja komora s konstantno prostornino z direktnim injiciranjem goriva v segret in stisnjen sintetičen zrak. Med sežigom preskušanega izdelka nastane dinamičen tlačni val. Enačba pretvori zakasnitev vžiga in sežiga, ki se določi na podlagi krivulje dinamičnega tlaka, v izpeljano cetansko število (DCN). Ta metoda se uporablja za dizelska goriva, vključno z gorivi, ki vsebujejo metilne estre maščobnih kislin (FAME). Metoda se uporablja tudi za srednje destilatna goriva nenaftnega izvora, čeprav so uporabniki tega standarda opozorjeni, da povezava med lastnostmi vžiga in zmogljivostjo motorja pri nekonvencionalnih gorivih še ni v celoti pojasnjena. Standard zajema obseg zakasnitve vžiga od 2,8 ms do 6,5 ms in zakasnitve sežiga od 5,5 ms do 120 ms (65 DCN do 30 DCN). Vendar navedena točnost zajema le razpon od 60 do 35 DCN.
General Information
- Status
- Published
- Publication Date
- 04-Aug-2015
- Withdrawal Date
- 28-Feb-2016
- Technical Committee
- CEN/TC 19 - Petroleum products, lubricants and related products
- Drafting Committee
- CEN/TC 19/WG 35 - Ignition quality testing and correlation
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 23-Apr-2021
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 06-May-2024
Overview
EN 16715:2015 is a CEN European Standard that specifies a laboratory test method to determine ignition delay (ID), combustion delay (CD) and the derived cetane number (DCN) of middle distillate fuels. The method uses a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air and records the dynamic pressure wave produced during combustion. The standard covers conventional diesel fuels, FAME (fatty acid methyl esters), blends of diesel and biodiesel, non‑petroleum middle distillates and other unconventional distillates, while noting limitations in how DCN relates to real engine behaviour for some fuel types.
Key topics and requirements
- Test principle: Inject a test portion into a constant volume combustion chamber; measure dynamic pressure to determine ID and CD from the injector electronic signal and the pressure trace.
- Measurement definitions:
- Ignition delay (ID) - time from injector signal rise to start of combustion.
- Combustion delay (CD) - time from injector signal rise to the pressure‑curve midpoint.
- Test sequence: 5 preliminary injection cycles followed by 15 analysed cycles; outliers are removed using Peirce’s Criterion and remaining results are averaged.
- Calibration & verification: Uses a calibration reference fluid (40:60 mass mix of hexadecane and 2,2,4,4,6,8,8‑heptamethylnonane). Assigned ARV values for peroxide‑free material: ID = 2.96 ms, CD = 4.90 ms.
- Applicable range & precision: ID range 2.47 ms to 4.09 ms and CD range 3.71 ms to 6.74 ms (corresponding approx. to DCN 67 to 39). The standard notes that the combustion analyser may measure outside this range but precision is unknown and there is limited information on comparison with EN ISO 5165 for DCNs outside 39–67.
- Safety: WARNING - the standard involves hazardous materials and equipment. Users must establish appropriate safety and regulatory practices.
Applications and who uses it
- Engine manufacturers - fuel matching, combustion research, and design validation for compression‑ignition engines.
- Petroleum refiners and fuel marketers - quality control, product development and specification compliance.
- Test laboratories and research institutes - routine DCN/ID/CD measurement, validation of alternative fuels (FAME, bio‑derived distillates), and correlation studies with engine performance.
- Regulatory and standards bodies - interchangeability and fuel quality assessment programs.
Related standards
- EN ISO 5165 - conventional large‑scale cetane number engine test (used for correlation).
- EN ISO 3170 / 3171 - sampling standards referenced for fuel sampling.
- IP 537 - related to purity determination of DCN reference materials.
Keywords: EN 16715:2015, derived cetane number, DCN, ignition delay, combustion delay, constant volume combustion chamber, FAME, middle distillate fuels, diesel, cetane number, combustion analyser.
Frequently Asked Questions
EN 16715:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels - Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection". This standard covers: WARNING The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This European Standard specifies a test method for the quantitative determination of ignition and combustion delays of middle distillate fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation is given to calculate the derived cetane number (DCN) from the ignition and combustion delays determined from the dynamic pressure curve. This standard is applicable to middle distillate fuels, fatty acid methyl esters (FAME) and blends of diesel fuels and FAME .The method is also applicable to middle distillate fuels of non-petroleum origin, oil-sands based fuels, blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives and low-sulfur diesel fuel oils. However, users applying this standard especially to unconventional distillate fuels are warned that the relationship between derived cetane number and combustion behaviour in real engines is not yet fully understood. This standard covers the ignition delay range from 2,47 ms to 4,09 ms and combustion delay from 3,71 ms to 6,74 ms (67 DCN to 39 DCN). NOTE 1 The combustion analyser can measure shorter or longer ignition and combustion delays, but precision is not known. NOTE 2 There is no information about how DCNs outside the 67 to 39 range compares to EN ISO 5165. NOTE 3 For the purpose of this European Standard, the expression (% (V/V)) is used to represent the volume fraction (φ), and (% (m/m)) the mass fraction (ω).
WARNING The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This European Standard specifies a test method for the quantitative determination of ignition and combustion delays of middle distillate fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation is given to calculate the derived cetane number (DCN) from the ignition and combustion delays determined from the dynamic pressure curve. This standard is applicable to middle distillate fuels, fatty acid methyl esters (FAME) and blends of diesel fuels and FAME .The method is also applicable to middle distillate fuels of non-petroleum origin, oil-sands based fuels, blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives and low-sulfur diesel fuel oils. However, users applying this standard especially to unconventional distillate fuels are warned that the relationship between derived cetane number and combustion behaviour in real engines is not yet fully understood. This standard covers the ignition delay range from 2,47 ms to 4,09 ms and combustion delay from 3,71 ms to 6,74 ms (67 DCN to 39 DCN). NOTE 1 The combustion analyser can measure shorter or longer ignition and combustion delays, but precision is not known. NOTE 2 There is no information about how DCNs outside the 67 to 39 range compares to EN ISO 5165. NOTE 3 For the purpose of this European Standard, the expression (% (V/V)) is used to represent the volume fraction (φ), and (% (m/m)) the mass fraction (ω).
EN 16715:2015 is classified under the following ICS (International Classification for Standards) categories: 75.160.20 - Liquid fuels. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 16715:2015 has the following relationships with other standards: It is inter standard links to prEN 16715. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 16715:2015 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssige Mineralölerzeugnisse - Bestimmung des Zündverzugs und der abgeleiteten Cetanzahl (ACZ) von Kraftstoffen aus Mitteldestillaten - Bestimmung des Zündverzugs und des Verbrennungsverzugs in einer Verbrennungskammer mit konstantem Volumen und direkter KraftstoffeinspritzungProduits pétroliers liquides - Détermination due délai d'inflammation et de l'indice de cétane dérivé (ICD) des distillatsmoyens - Détermination due délai d'inflammation et de combustion par utiliser in une une chambre à volume constant avec injection direct de gazoleLiquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels - Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection75.160.20Liquid fuelsICS:Ta slovenski standard je istoveten z:EN 16715:2015SIST EN 16715:2015en,de01-oktober-2015SIST EN 16715:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16715
August 2015 ICS 75.160.20 English Version
Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels - Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection
Produits pétroliers liquides - Détermination du délai d'inflammation et de l'indice de cétane dérivé (ICD) des distillats moyens - Détermination du délai d'inflammation et de combustion en utilisant une chambre à volume constant avec injection directe de gazole
Flüssige Mineralölerzeugnisse - Bestimmung des Zündverzugs und der abgeleiteten Cetanzahl (ACZ) von Kraftstoffen aus Mitteldestillaten - Bestimmung des Zündverzugs und des Verbrennungsverzugs in einer Verbrennungskammer mit konstantem Volumen und direkter Kraftstoffeinspritzung This European Standard was approved by CEN on 20 June 2015.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16715:2015 ESIST EN 16715:2015
Operational details in support to the standard test procedure . 19 B.1 General . 19 B.2 Cleaning procedure to prepare fuel system for calibration . 19 B.3 Automatic calibration procedure . 19 B.4 Test sequence . 20 B.5 Unit shutdown . 22 Bibliography . 23
Key Digital signals Analogue signals L1: upper level sensor T1: coolant temperature L2: lower level sensor T2: inner wall temperature TF: thermal fuse P1: fuel pressure M1: hydraulic pump P2: chamber dynamic pressure N1: injector P3: chamber static pressure V1: flush valve P4: nitrogen pressure V2: air inlet valve FR1: coolant flow rate V3: exhaust valve
Vx: nitrogen circuit valves
Analyser lines Analyser parts (no signal registration) AI: Air inlet CC: Combustion chamber CI: Coolant input F1, F2, F3: Filter CO: Coolant output M2: Multiplier EX: Air exhaust RD: Rupture disk NI: Nitrogen input S1: Safety valve SI: Sample inlet SV: Sample vessel
WB: Sample waste drain
H1: Clam shell heater Figure 1 — Schematic overview of combustion analyser SIST EN 16715:2015
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기사 제목: EN 16715: 2015 - 액체 석유 제품 - 중간 증류 연료의 발화 지연 및 파생 산화 효소 번호(DCN) 결정 - 직접 연료 주입을 통한 일정 용량 연소실을 이용한 발화 지연 및 연소 지연의 결정. 기사 내용: 경고 이 표준의 사용에는 위험한 물질, 작업 및 장비가 포함될 수 있습니다. 이 표준은 사용에 필요한 적절한 안전 및 보건 관행을 수립하고 규제 제한의 적용 가능성을 판단하기 위해 사용자의 책임입니다. 이 유럽 표준은 압축 점화 엔진에서 사용하기 위한 중간 증류 연료의 발화 및 연소 지연을 정량적으로 결정하기 위한 시험 방법을 명시합니다. 이 방법은 일정 용량 연소실에 직접 연료를 주입하고 가열된 압축 합성 공기에 연료를 노출시킵니다. 시험 대상물 제품의 연소로부터 동적 압력 파동이 생성됩니다. 압력 곡선으로부터 결정된 발화 지연 및 연소 지연을 사용하여 파생 산화 효소 번호 (DCN)을 계산하기 위한 방정식이 제공됩니다. 이 표준은 중간 증류 연료, 지방산 메틸 에스터 (FAME) 및 디젤 연료와 FAME의 혼합물에 적용될 수 있습니다. 이 방법은 비석유계 중간 증류 연료, 오일 샌드 기반 연료, 바이오 디젤 물질 함유 연료의 혼합물, 산화 효소 번호 개선제 첨가 연료, 저황 디젤 연료에도 적용될 수 있습니다. 그러나 이 표준을 특히 기존의 중간 증류 연료와는 다른 연료에 적용하는 사용자들은 파생 산화 효소 번호와 실제 엔진에서의 연소 행동과의 관계가 아직 완전히 이해되지 않았음을 주의해야 합니다. 이 표준은 발화 지연 범위가 2.47ms에서 4.09ms이며, 연소 지연은 3.71ms에서 6.74ms (DCN 67에서 39까지)입니다. 참고 1:연소 분석기는 더 짧은 또는 더 긴 발화 지연과 연소 지연을 측정할 수 있지만, 정밀도는 알려져 있지 않습니다. 참고 2: DCN 67에서 39 범위 이외의 DCN에 대한 EN ISO 5165와의 비교 정보는 없습니다. 참고 3:이 유럽 표준을 위해 (% (V / V)) 표현이 체적 분량 (φ)을 나타내기 위해 사용되며, (% (m / m))은 질량 분량 (ω)을 나타냅니다.
記事のタイトル：EN 16715：2015 - 液体石油製品 - 中間蒸留フューエルの点火遅延と派生セタン数（DCN）の測定 - 直接燃料噴射を伴う定圧燃焼室を用いた点火遅延と燃焼遅延の測定。 記事の内容：警告 この規格の使用には、危険な物質、操作、および機器が関与する場合があります。この規格は、使用者が適切な安全および衛生規則を確立し、使用前に規制上の制限の適用可能性を判断する責任があります。 このヨーロッパ規格は、圧縮着火エンジンで使用するための中間蒸留フューエルの点火および燃焼遅延を定量的に測定するための試験方法を指定しています。この方法は、加熱された圧縮した合成空気に直接燃料を噴射する定圧燃焼室を使用します。試験対象の製品の燃焼により、動的な圧力波が生成されます。圧力曲線から求められる点火遅延および燃焼遅延を使用して派生セタン数（DCN）を計算するための式が示されています。 この規格は、中間蒸留フューエル、脂肪酸メチルエステル（FAME）、ディーゼル燃料とFAMEのブレンドに適用可能です。この方法は、非石油由来の中間蒸留フューエル、オイルサンドベースの燃料、バイオディーゼル材料を含む燃料のブレンド、セタン数改良剤添加ディーゼル燃料油、低硫黄ディーゼル燃料油にも適用可能です。ただし、特に非伝統的な蒸留フューエルにこの規格を適用する場合、派生セタン数と実エンジンでの燃焼挙動の関係がまだ完全に理解されていないことに注意する必要があります。 この規格は、点火遅延範囲が2.47ミリ秒から4.09ミリ秒、燃焼遅延が3.71ミリ秒から6.74ミリ秒（DCN 67から39）をカバーしています。 注1：燃焼アナライザーは、より短いまたは長い点火遅延および燃焼遅延を測定できますが、精度は不明です。 注2：DCN 67から39の範囲外のDCNとEN ISO 5165との比較情報はありません。 注3：このヨーロッパ規格では、（％（V / V））は体積分率（φ）を表すために使用され、（％（m / m））は質量分率（ω）を表します。
EN 16715:2015 is a European Standard that provides a test method for determining the ignition and combustion delays of middle distillate fuels used in compression ignition engines. The method involves using a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is generated from the combustion process, and the derived cetane number (DCN) can be calculated using an equation based on the ignition and combustion delays determined from the pressure curve. This standard is applicable to various types of middle distillate fuels, including biodiesel blends and low-sulfur diesel fuel oils. However, it is important to note that the relationship between DCN and combustion behavior in real engines is not fully understood for unconventional fuels. The standard covers a range of ignition and combustion delays and provides notes regarding precision and the comparison to other similar standards.
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