Antiknock rating
Definition
A structural property of a liquid fuel to resist detonation, meaning rapid and explosive auto-ignition within the cylinders of a spark-ignition engine; detonation resistance. It represents an essential technical characteristic evaluated by the octane number, guaranteeing optimal thermal efficiency and the protection of internal mechanical components.
Bilingual Equivalents
- Antiknock rating
- Knock resistance
Grammatical & Source Details
| Inflection Type | Feminine noun, singular only, standard genitive and dative structural forms. |
| Formation | Technical noun of quality derived from the adjective 'antidetonant' using the functional suffix '-ță'. |
| Spelling / Pronunciation | [an.ti.de.to.ˈnan.tsə] |
| Source | Lexicon of Hydrocarbon Chemistry and Internal Combustion Engine Diagnostics |
Contextual Usage Examples
RO: O antidetonanță ridicată este obligatorie pentru benzina folosită la motoarele de curse cu raport de compresie mare.
EN: A high antiknock rating is mandatory for gasoline used in racing engines with a high compression ratio.
RO: Testele de laborator au arătat că acest aditiv organic îmbunătățește considerabil starea de antidetonanță a amestecului.
EN: Laboratory tests showed that this organic additive considerably improves the antiknock state of the mixture.
RO: Cifra octanică este indicatorul standard prin care se măsoară gradul de antidetonanță al unui carburant auto.
EN: The octane number is the standard indicator used to measure the degree of knock resistance of an automotive fuel.
Idioms & Phrases
Grad de antidetonanță / Degree of knock resistance
RO: Nivelul de stabilitate chimică al unui combustibil în condiții extreme de temperatură și presiune în interiorul cilindrului.
EN: The level of chemical stability of a fuel under extreme conditions of temperature and pressure inside the cylinder.
Ameliorarea stării de antidetonanță / Improving antiknock quality
RO: Proces tehnologic de rafinare sau aditivare prin care se previne declanșarea arderilor secundare violente.
EN: A technological process of refining or adding additives through which the triggering of violent secondary combustions is prevented.
Antidetonanță optimă / Optimal knock resistance
RO: Valoare ideală a rezistenței la autoaprindere care permite motorului să dezvolte puterea maximă fără șocuri mecanice.
EN: An ideal value of auto-ignition resistance that allows the engine to develop maximum power without mechanical shocks.
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