knocking combustion
111Regular grade gasoline — A grade of unleaded gasoline with a lower octane rating (approximately 82) than other grades. Octane boosters are added to gasoline to control engine pre ignition or knocking by slowing combustion rates. U.S. Dept. of Energy, Energy… …
112tap — vb Tap, knock, rap, thump, thud can mean, as verbs, to strike or hit audibly or, as nouns, the sound or effect produced by such striking or hitting. Tap implies a light blow usually repeated (as to attract attention to one s presence, needs, or… …
113carbon knock — When there is a build up of carbon in the combustion chamber, uncontrolled ignition will take place causing a knocking noise …
114knock-rating — knockˈ rating noun The measurement of freedom from knocking of a fuel in an internal combustion engine, as compared with a standard fuel • • • Main Entry: ↑knock …
