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. 排氣蝶閥制動。

　　1. Exhaust butterfly valve brake.

　　蝶閥制動的原理和結構也相對簡單。司機使用蝶閥制動后,蝶閥旋轉塊排氣管和形式可控發(fā)動機汽缸的背壓,以增加發(fā)動機的功率消耗排氣沖程發(fā)動機減少的速度和力量,從而達到在短時間內減少速度的目標。排氣蝶閥結構相對簡單，性價比高，制動效果。

　　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. 放氣制動。

　　2. Bleed the brake.

　　市場上也有許多產品用于泄氣的發(fā)動機制動。放氣制動工作時，打開排氣閥，間隙小，使發(fā)動機在壓縮行程時通過放氣釋放壓縮能量。以這種方式，幾乎沒有能量返回到活塞在動力沖程。在排氣過程中，排氣行程依靠排氣蝶閥或VGT渦輪增壓器產生的背壓來增加進排氣功率消耗。根據實施方式的不同，可以分為主動和被動兩種。

　　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.壓縮制動。

　　3. Compression braking.

　　本文詳細闡述了壓縮制動的原理，即改變發(fā)動機排氣閥的閥相。壓縮行程結束時，打開排氣閥，使發(fā)動機壓縮氣缸內空氣所做的功釋放到排氣系統中。膨脹工作時，排氣閥關閉，攪拌器氣缸接近真空，活塞向下運動類似于抽真空過程，產生負功。這種類型的制動器功率，結構更復雜，當然價格也是更貴的。

　　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.