The mixer is a series of engineering vehicles. We all know that the working environment and driving conditions of the mixer are not very good, so it is necessary to have very strict braking requirements for the mixer. Here's how to brake the hybrid.

　　1. 排气蝶阀制动。

　　1. Exhaust butterfly valve brake.

　　蝶阀制动的原理和结构也相对简单。司机使用蝶阀制动后,蝶阀旋转块排气管和形式可控发动机汽缸的背压,以增加发动机的功率消耗排气冲程发动机减少的速度和力量,从而达到在短时间内减少速度的目标。排气蝶阀结构相对简单，性价比高，制动效果。

　　The principle and structure of butterfly valve brake are relatively simple. After the driver uses the butterfly valve to brake, the exhaust pipe of the butterfly valve rotating block and the form can control the back pressure of the engine cylinder, so as to increase the power consumption of the engine and reduce the speed and force of the engine during the exhaust stroke, so as to achieve the goal of reducing the speed in a short time. The structure of exhaust butterfly valve is relatively simple, with high cost performance and the lowest braking effect.

　　2. 放气制动。

　　2. Bleed the brake.

　　市场上也有许多产品用于泄气的发动机制动。放气制动工作时，打开排气阀，间隙小，使发动机在压缩行程时通过放气释放压缩能量。以这种方式，几乎没有能量返回到活塞在动力冲程。在排气过程中，排气行程依靠排气蝶阀或VGT涡轮增压器产生的背压来增加进排气功率消耗。根据实施方式的不同，可以分为主动和被动两种。

　　There are also many products on the market that are used for the brake of a deflated engine. When the bleed brake works, open the exhaust valve with small clearance, so that the engine can release the compressed energy through the bleed during the compression stroke. In this way, almost no energy is returned to the piston during the power stroke. In the exhaust process, the exhaust stroke depends on the back pressure generated by the exhaust butterfly valve or VGT turbocharger to increase the intake and exhaust power consumption. According to different ways of implementation, it can be divided into active and passive.

　　3.压缩制动。

　　3. Compression braking.

　　本文详细阐述了压缩制动的原理，即改变发动机排气阀的阀相。压缩行程结束时，打开排气阀，使发动机压缩气缸内空气所做的功释放到排气系统中。膨胀工作时，排气阀关闭，搅拌器气缸接近真空，活塞向下运动类似于抽真空过程，产生负功。这种类型的制动器功率，结构更复杂，当然也是更贵的。

　　In this paper, the principle of compression brake is described in detail, that is to change the valve phase of engine exhaust valve. At the end of the compression stroke, open the exhaust valve to release the work done by the air in the compressed cylinder of the engine into the exhaust system. During the expansion operation, the exhaust valve is closed, the agitator cylinder is close to the vacuum, and the downward movement of the piston is similar to the vacuum pumping process, resulting in negative work. This type of brake has the biggest power, the most complicated structure and the most expensive price.