The author briefly introduces the history of hydraulic retarder,stressing on its basic structure,working principles and control modes.The author also presents a primary analysis on braking effect.

• 简单介绍缓速器的发展历史,重点叙述液力缓速器的基本结构、工作原理和控制方式,并对液力缓速器的制动效果做了初步的分析。