Motor and aviation-type fuels — Determination of knock characteristics — Motor method

This document establishes a standardized procedure for evaluating the knocking characteristics of engine fuels using a specific engine-based test method. It outlines the necessary equipment, fuel preparation steps, and operational protocols required to determine the anti-knock performance of motor and aviation fuels under controlled conditions. The test utilizes a variable compression ratio engine configured to measure fuel quality based on its tendency to detonate. Detailed specifications are provided for the engine construction, operating parameters, and data analysis techniques to ensure consistent and reproducible results across different testing facilities. This approach allows for the comparison of various fuel formulations and aids in the development of higher efficiency engines. The methodology focuses on precise measurement techniques and rigorous control of experimental variables to maintain accuracy. It serves as a reference for laboratories engaged in fuel testing and quality assurance within the aviation and automotive sectors, facilitating the assessment of fuel performance without directly addressing specific organizational affiliations or exact release dates.