Differences in regulations and design philosophies have brought about the decelopment of significantly different hardware in the braking system of U.S. and European heavy vehicles. In the service braking system, for example, European heavy vehicles generally have larger front brakes than their U.S. counterparts, and they are usually equipped with load-sensing brake proportioning valves (not used on U.S. vehicles). Emergency brake systems and parking brake systems are also different. This paper discusses those differences that have a significant impact on safety-related performance and present the results of recent tests that were run to compare the braking performance of a U.S. five-axle tractor semitrailer combination to a European vehicle of the same basic size, weight and axle configuration in various simulated accident avoidance maneuvers. (A) For the covering abstract of the conference, see IRRD 837684.
Samenvatting