Overview

摘要

The Fourth Symposium on Engine Coolants demonstrated many advances and changes in the technology of coolants and their testing procedures. A gradual globalization of coolant formulation is occurring in parallel with the world production of specific vehicles that meet the demands of several disparate markets. There are still important differences in the direction of technology in the United States, Europe, Japan, and the rest of the world. There is now a more widespread acceptance that usefully constructed coolants should be used in any location. New engine designs demand coolant fluid discipline. Organic acid basic inhibitor technology is the growth area with continued interest in propylene glycol as a substitute for the more commonly used ethylene glycol. The new work is in extended life coolants. Major vehicle manufacturers are now recommending 10 years or in some instances life of vehicle coolants. These factors will slow the total volume of coolant required somewhat, but the total world vehicle population is increasing at the same time. There is continued interest in the development, management, and quality control of the modem engine for both OEM and after-market, which is the main purpose of ASTM D15 Committee as the standards body responsible for guiding a consensus towards agreed levels of technical competence to serve an increasingly sophisticated vehicle market.