In recent years, Yuchai Group's electronically controlled engine market has been ranked first in the industry. Yuchai’s engine, which is ahead of its peers with its first-mover advantage, has been highly praised by people in the industry. In the field of passenger vehicles, Yuchai’s heavy-duty electronically controlled engines have always been the first choice for passenger car product upgrades. Yuchai’s three heavy-duty electronically controlled engines have served the most challenging national “two sessions†reception work many times. Electronically controlled engines are also listed as special models for Beijing Olympics reception vehicles; in the field of heavy trucks, Yuchai's heavy-duty electronically controlled engines also attract a group of users who love electronically controlled heavy trucks with their outstanding performance.
The new generation of YC6MK, YC6M, YC6L, and YC6A heavy duty electronically controlled engines have integrated advanced technologies such as four-valve and in-cylinder braking. The application of four-valve technology has significantly increased the intake and exhaust flow area of ​​Yuchai's heavy-duty engines, improved the engine's intake and exhaust efficiency, and reduced the intake and exhaust noises, while the application of injector technology The fuel atomization is more uniform and combustion is more complete, so as to achieve the purpose of energy saving and emission reduction of the engine. The application of in-cylinder brake technology is conducive to improving the brake efficiency of the whole vehicle and ensuring safer driving; at the same time, the service cycle of brake pads and brake hubs is prolonged, the operational efficiency of vehicles is improved, and the maintenance cost of the brake system is reduced.
Calibration technology is the core of the development of electronically controlled engine products. The perfect electronic control system integration technology is also a significant feature of Yuchai's electronic control technology. The electronic control systems applied by Yuchai mainly include electronically controlled common rail systems, electronically controlled monomer pump systems, electronically controlled in-line pump systems, and electronically controlled gas systems. The simultaneous application of a variety of electronic control technologies has resulted in higher technological content. Electronically controlled engine. Yuchai's electronically controlled engine is more detailed, more comprehensive, safer, more mature, and more user-friendly. The electronically controlled fuel system can achieve high-pressure injection over the entire engine speed range. Pre-injection and main injection can be completed in the cycle. Three-stage fuel injection, such as post-injection, or even multi-phase injection; the ECU computer can flexibly and accurately control the amount of oil and injection time, which can reduce diesel engine particles and nitrogen oxides, while ensuring excellent power performance and fuel economy. .
Yuchai developed a heavy-duty gas electronically-controlled engine at the same time. Currently, there are more than 1,000 Yuchai gas-electrically controlled engines. On June 14, 2008, Yuchai's gas engine customer exchange meeting was held on the theme of “environmental protection, energy conservation and new energyâ€. Held in Sanya City, Hainan Province, a YC6M four-valve gas electronically controlled engine on the stand told people that Yuchai’s heavy-duty gas-electrically controlled engines have been developed in tandem. According to Wu Qiwei, deputy general manager of Yuchai Co., Ltd., said: YC6M four-valve gas electronically controlled engine has 290 horsepower, 310 horsepower, 340 horsepower three power segment models, because this model uses advanced four-valve technology and electricity Control technology, the engine has a clear advantage, emissions meet the three national standards, the current model has been exported in small quantities, the domestic two heavy truck companies will soon put a heavy truck equipped with this engine. Under the background of rising oil prices and frequent oil shortages, electronically controlled gas engines also have broad prospects for development.
View related topics: Yuchai won the "China Brand Annual Award NO.1" (internal combustion engine) title in 2007
Hydraulic Engineering Percussion Drilling Rig
Percussion drilling is a manual drilling technique in which a heavy cutting or hammering bit attached to a rope or cable is lowered in the open hole or inside a temporary casing. The technique is often also referred to as 'Cable tool'. Usually a tripod is used to support the tools. By moving the rope or cable up and down, the cutting or hammering bit loosens the soil or consolidated rock in the borehole, which is then extracted later by using a bailer. Just as with hand augering, a temporary casing of steel or plastic may be used to prevent the hole from collapsing. When the permanent well screen and casing are installed, this temporary casing has to be removed.
The percussion borehole drilling rig's technical advantages:
- Unlike any other drilling method, percussion can remove boulders and break harder formations, effectively and quickly through most types of earth.
- Percussion drilling can in principle deal with most ground conditions.
- Can drill hundreds of feet (one well hand-drilled in China in 1923 was over 4000 feet deep).
- Can drill further into the water table than dug wells, even drilling past one water table to reach another.
Hydraulic Engineering Percussion Rig,Big Cable Percussion Drilling Rig,Large Diameter Construction Percussion Rig
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