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UNGÜLTIG ASTM D4858-13 15.6.2013 Ansicht

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ASTM D4858-13

Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines (Withdrawn 2022)

Automatische name übersetzung:

Standard Test Methode zur Bestimmung der Neigung von Schmiermittel zu Vorzündzeit in Zweitakt-Benzinmotoren fördern

NORM herausgegeben am 15.6.2013

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Informationen über die Norm:

Bezeichnung normen: ASTM D4858-13
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 15.6.2013
SKU: NS-28916
Zahl der Seiten: 9
Gewicht ca.: 27 g (0.06 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM

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Lubricants, industrial oils and related products

Die Annotation des Normtextes ASTM D4858-13 :

Keywords:
air-cooled, lubricant, preignition, two-cycle gasoline engine, ICS Number Code 75.100 (Lubricants, industrial oils and related products)

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Significance and Use

5.1 Two-stroke-cycle gasoline engines are generally more prone to preignition than are four-stroke-cycle engines due to the absence of the internal cooling that takes place during the induction stroke of the four-stroke-cycle engines. Preignition can lead to major piston damage, either directly due to localized overheating or as the result of preignition-induced detonation. Some lubricant additives that are widely used in four-stroke-cycle gasoline engine oils are known to increase the probability of preignition in gasoline two-stroke-cycle engines. This procedure is used to determine the tendency of an oil to induce preignition in both water-cooled and air-cooled two-stroke-cycle gasoline engines.

1. Scope

1.1 This test method² evaluates the performance of lubricants intended for use in two-stroke-cycle spark-ignition gasoline engines that are prone to preignition.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, 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.

2. Referenced Documents

D2885-21	Standard Test Method for Determination of Octane Number of Spark-Ignition Engine Fuels by On-Line Direct Comparison Technique
D2896-21	Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration
D664-18e2	Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration (Includes all amendments and changes 1/4/2019).
D2700-23b	Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel (Includes all amendments and changes 1/17/2024).
D2699-23b	Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel (Includes all amendments and changes 1/17/2024).
D2270-10(2016)	Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 °C and 100 °C
D910-24	Standard Specification for Leaded Aviation Gasolines
D874-23	Standard Test Method for Sulfated Ash from Lubricating Oils and Additives
D445-23	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D439-89	Specification for Automotive Gasoline (Withdrawn 1990)
B152/B152M-19	Standard Specification for Copper Sheet, Strip, Plate, and Rolled Bar
D4857-12	Standard Test Method for Determination of the Ability of Lubricants to Minimize Ring Sticking and Piston Deposits in Two-Stroke-Cycle Gasoline Engines Other Than Outboards (Withdrawn 2021)
D4863-13	Standard Test Method for Determination of Lubricity of Two-Stroke-Cycle Gasoline Engine Lubricants (Withdrawn 2022)
E230-03	Standard Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples
ANSI MC 96.1	American National Standard for Temperature Measurement Thermocouples Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

ASTM D4858-13

Automatische name übersetzung:

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Die Annotation des Normtextes ASTM D4858-13 :

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