中国重汽商用车整车产品匹配的液力缓速器主要有两种：新STR品牌产品HW系列变速箱上装配德国福伊特VR115液力缓速器和SITRAK品牌产品ZF变速箱上装配的ZF缓速器。目的在于满足人们每天运输大量的货物盘山越岭时，对人和车辆的安全性要求。人们都特别希望以高的平均车速，并安全、经济、准时的把货物送达目的地，而且使制动器磨损最小。

There are two main types of hydraulic retarders that match the vehicle products of the commercial vehicle of China Heavy Truck: the new STR brand product HW series gearbox is equipped with the German Forit VR115 hydraulic retarder and the ZF retarder assembled on the ZF transmission of the SITRAK brand product. The aim is to satisfy the safety requirements of people and vehicles when people transport large quantities of goods every day. People especially hope to deliver the goods to the destination with high average speed and safety, economy and punctuality, and make the brakes wear the least.

液力缓速器以其强劲地制动力矩承担80％到90％的行车制动，不仅保证了行车安全，而且大大减少了制动器的摩损。操作简便、制动柔和、反应灵敏、制动力矩高、重量轻、能恒定控制下长坡的车速。

The hydraulic retarder takes 80% to 90% driving braking with its strong braking torque, which not only ensures the safety of the driving, but also greatly reduces the friction of the brake. It is easy to operate, gentle in braking, sensitive in reaction, high in braking torque, light in weight, and can control the speed of long slope under constant control.

一、缓速器产品介绍

Introduction of retarder products

1.1、德国福伊特VR115液力缓速器

1.1, German Forit VR115 hydraulic retarder

VR115液力缓速器通过升速比为2或2.15齿轮副与变速器并联安装；

The VR115 hydraulic retarder is installed in parallel with the transmission through the lifting ratio of 2 or 2.15.

变速器可同时安装取力器；

The transmission can be installed at the same time.

更小、更紧凑的设计；

Smaller and more compact design;

相同性能、质量更轻；

The same performance and lighter quality;

更优的低速减速性能。

Better low speed deceleration performance.

1.2、德国ZF液力缓速器

1.2. The German ZF hydraulic retarder

与ZF变速器系统兼容；

Compatible with the ZF transmission system;

完美匹配的整套系统；

The perfect match system;

最佳集成到车辆制动管理系统，包括速度控制系统；

It is best integrated into vehicle braking management system, including speed control system;

与其他减速器系统相比，由于轻量化结构而获得更高的有效载荷；

Compared with other decelerator systems, a higher payload is obtained due to lightweight structure.

可与取力器任意组合。

It can be combined with the force collector arbitrarily.

二、操作方式

Two. Operation mode

重汽车辆把缓速器整合到车辆制动系统里，缓速器是通过车辆控制系统或者缓速器控制系统根据运行和操作状况来激活的，液力缓速器非常简易地通过安装在转向柱上的缓速器手柄开关控制。

Heavy vehicles integrate the retarder into the vehicle brake system. The retarder is activated by the vehicle control system or the retarder control system based on operation and operation conditions. The hydraulic retarder is easily controlled by the retarder handle switch installed on the steering column.

2.1德国福伊特VR115液力缓速器

2.1 German Forit VR115 hydraulic retarder

缓速器工作状态显示在车辆的仪表盘上，缓速器工作时，指示灯点亮。多功能开关：0 挡缓速器关 ，1挡激活恒速控制，2挡25%缓速力矩，3挡50%缓速力矩，4挡75%缓速力矩，5挡100%缓速力矩。

The working state of the retarder is displayed on the dashboard of the vehicle. When the retarder works, the indicator light is lighted. Multi function switch: 0 gear retarder shut, 1 gear active constant speed control, 2 gear 25% slow torque moment, 3 gear 50% slow torque moment, 4 gear 75% slow torque moment, 5 block 100% slow torque.