As we all know, for the trucks around us, what a good truck has, besides its dynamic performance, carrying capacity and comfort, there is an important performance that we should focus on, that is safety, and The safety is nothing more than the brake system, and the brake systems are mostly similar. In order to achieve a better braking effect, some engine manufacturers have gradually developed some engine-assisted braking systems. China Truck Network will popularize it for driver friends today. The basic knowledge of the engine-assisted system, and recommended to the driver's friends an FCB (Fixed Chain Braking System), an auxiliary brake system with good braking effect. There are three types of engine-assisted brake systems on the market: exhaust butterfly valve brakes, deflated brakes, and compression-release brakes. The main working principle of the exhaust butterfly valve braking system is that when the vehicle is braked, the butterfly valve will block the exhaust pipe, forming a controlled back pressure in the engine cylinder, increasing the power consumption of the engine exhaust stroke, forcing the engine Reduce the speed, so as to achieve the purpose of reducing the speed in a short time. Because the structure of the exhaust butterfly valve is relatively simple and cost-effective, most trucks on the market use this kind of engine-assisted braking, and the braking effect is relatively low, but it can also meet the braking requirements in areas with good driving conditions. The request. Three auxiliary braking systems for engines There are also many products on the market for deflated engine brakes. When the deflation brake is working, the exhaust valve is opened to a small gap, so that the engine releases the compressed energy through the deflation during the compression stroke, so that almost no energy is returned to the piston during the power stroke. . During the exhaust process, the exhaust stroke relies on the back pressure generated by the exhaust butterfly valve or VGT turbocharger to increase intake and exhaust power. The advantage is greater flexibility, suitable for any engine design, as well as low additional weight, reducing the engine load, but also effectively reduce the wear of tires, wheels and the main brake; but there are also some deficiencies, that is, must be with the row The air butterfly valve is jointly operated and the sealing performance of the exhaust butterfly valve has a great influence on the braking effect. The deflation is that the engine brake has been widely used in engines such as Weichai WEIB and Heavy Gas EVB Xichai CA6DL2. Compression release braking is one of the best braking effects in the three engine-assisted braking systems. The compression release braking system is divided into a hydraulic compression release system and FCB (solid chain compression release system). The FCB braking system is an engine-assisted braking system that FAW Xichai has built to achieve a higher braking level, and is also an engine braking assistance system that China Truck Network will focus on. The hydraulic brake is an integrated engine brake. Based on the principle of hydraulic pressure, it is beneficial to the incompressibility of the oil. The brake exhaust valve is controlled by the brake plunger. The hydraulic pressure controls the braking effect. The FCB is an engine brake integrated in a rocker arm mechanism. The braking principle is the same as the hydraulic brake (interchangeable), but it uses a fixed link structure to drive a brake exhaust valve through a set of lever mechanisms. Braking efficiency and reliability are higher. The brake also has a big advantage that it can work alone and does not need to be combined with the exhaust butterfly valve; and when combined braking, the braking effect is more pronounced. FAW Jiefang Xichai Engine FCB (Solid Chain Compression Release System) It is understood that FCB braking system uses a rigid link mechanism of all metals, compared with the traditional engine brakes, can effectively reduce the vehicle deformation and load under high-speed operating conditions, more secure and reliable. The higher the speed, the higher the braking power, and the application of solid chain compression and release technology makes the engine's braking power greatly exceed that of other mainstream brands. Some studies have shown that compared with the proportion of 40% of the rated power of the deflated brake power engine, the ratio of the rated power of the hydraulic brake power engine is 85%, and the braking power of the FCB system even exceeds the rated power of the engine, accounting for up to 105 % is one of the brake systems with the largest engine auxiliary brake power. Application of FAW Jiefang Diesel Engine FCB auxiliary brake system FAW Jiefang J6 China Truck Network reporter also learned from the mouth of FAW Xichai technicians that the FCB brake system is currently standard on Xichai Aowei 11L engines and is optional on Xichai 6DL series engines. He also told reporters that there is a truck driver who frequently travels back and forth between Linyi and Kunming in Yunnan Province. He uses the J6 truck of the FAW Liberated with the Xichai Aowei engine. Due to the large number of local roads and many downhill roads, driving conditions are very high. Danger, the brake system is very demanding. Before passing through these roads, he was always worried. He was always afraid of being careless, unable to control the brakes and causing accidents. However, since the release of the FCB brake system on its own J6 truck, this concern has been solved. Now after these long downhill sections, there is no need to step on the brakes as often as before. The car runs smoothly and safely every month. Can save more than 1,200 yuan in brake pad money. Perhaps an experienced driver will ask the reporter if it is not effective if the retarder is installed. In fact, the retarder does not equal the brake. The function of the retarder is retarding to ensure the safety of driving; the function of the service brake is deceleration, Brakes, brakes, and brakes are more direct than brakes. We have seen that while the economy is speeding up, road transportation is developing faster and faster. The demand for transportation efficiency is gradually increasing. The average speed of trucks is getting faster and faster. As a result, the number of traffic accidents caused by trucks in China each year is increasing year by year. With the rise, life is precious, and the effect of the braking system is directly related to life safety. Through further understanding of the FCB braking system, the China Truck Network reporter found that the FCB braking system is indeed a very good driving safety guard with performance sticks. clatter. JIANGSU OUCO HEAVY INDUSTRY AND TECHNOLOGY CO., LTD , https://www.marinelifting.com
