THIS paper represents a method by which the knocking characteristics of automotive engines may be compared in relation to the Research Method and Motor Method engines.
The effects of many engine variables on the ratings of sensitive fuels in passenger-car engines are illustrated. These variables include compression ratio, engine speed, air density, distributor tolerances, and temperature.
Direct comparisons are made of the manner in which 1955 passenger cars utilize fuel antiknock quality. It is indicated that two knock test methods must be used to achieve fuel quality control as fuel quality is recognized by engines operated in passenger cars.