As a Chinese truck engine production expert, in order to meet the different needs of users and the increasing national emission policy, Weichai has started to develop a series of natural gas engines that are dynamic and reliable from the perspectives of energy conservation, environmental protection, and reduction of user cost. In terms of sex, it has reached the international level.
Natural gas engines are mainly divided into two types: LNG (Liquefied Natural Gas) and CNG (Compressed Natural Gas). Weichai natural gas engines are mainly designed and developed on the basis of the original diesel engines, and their reliability is effectively guaranteed. The US WOOD OH2.0 gas is used. Electronic control system, single-point injection, and lean combustion by closed-loop control. The new diesel fuel supply system replaces the existing diesel fuel system; and the ignition type ignition system is used to increase the ignition control system and More in line with the combustion method of the gas system; in order to prevent knocking, the compression ratio of the gas engine is better than The diesel engine is small. The combustion chamber is also different from the diesel engine. A signal generator is installed to judge the cylinder and measure the engine speed. In addition, the mixer and the throttle are added so that the gas and air are mixed in the mixer; The temperature is high, the supercharger usually uses a water-cooled intermediate shell, and the intake and exhaust valve seats are mainly made of wear-resistant, high-temperature resistant materials, and exhaust pipes with heat-insulating materials.
Weichai engine CNG system 
Weichai LNG engine system
China Truck Network understands that the service life of Weichai natural gas engines can be more than 30% higher than that of similar products and the gas consumption is 10% lower than that of similar products, which can save users a great deal of usage costs and can easily achieve national and national levels. Emission Standards.
Weichai natural gas engines mainly include WP5, WP6, WP7, WP10, WP12, etc. The power coverage range is 160-480 hp. No matter if it is a light truck, medium truck, or heavy truck, it can get the best match. At present, Weichai natural gas engines WP5, WP6, and WP7 are widely used on passenger cars, while WP10 and WP12 are mainly equipped on heavy trucks and heavy-duty special vehicles.
China's First High-Power In-cylinder High-Pressure Direct Injection Combustion Natural Gas Engine WP12
In March 2012, Weichai released China's first high-power, high-pressure, direct-injection, compression-ignition natural gas engine, the WP12, which fills the gap in the application of natural direct-injection engines in China. The WP12 engine maintains the same power and torque as the original diesel engine. Its power is exactly the same as that of the diesel engine, and its power and torque are 20% higher than those of the spark plug ignition gas engine, which can effectively solve the problem of insufficient plateau power of the ignition type gas engine. It can be seen that Weichai has absolute advantages in the field of natural gas engine technology.
Heavy trucks equipped with Weichai natural gas engines
It is reported that natural gas trucks produced by mainstream domestic brands such as Shaanxi Auto, Auman, FAW Liberation Qingdao, and SAIC Iveco Hongyan are all equipped with Weichai natural gas engines. In 2014, Shaanxi Steam Heavy Trucks equipped with Weichai natural gas engines sold more than 10,000 units in 2014 and gained widespread recognition in the market. According to relevant experts' forecasts, in 2015, production and sales of natural gas heavy trucks could reach more than 60,000 units, indicating that the market for natural gas heavy trucks still has broad space for development.
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