Compression ratio selection and fuel anti-knock performance is closely related to the anti-knock performance is to measure octane fuel, the higher the octane number, the better the anti-knock properties Weifang gas engines, several commonly used fuel by Sim alkoxy value from high to low as follows: diesel, CNG (methane), propane, butane (LPG is a mixture of propane and butane) and gasoline. According to this fuel characteristics, general LPG CNG engine compression ratio than high, but lower than the diesel engine and LPG engine compression ratio is slightly higher than gasoline and can, of course, the gas engine market prices, as LPG is a mixture of propane and butane, different mixing ratio also affect the compression ratio selection. Of the 1950s began to develop low-pressure natural gas vehicle gas engine manufacturers, after the late 1980s, reform and opening up, the pace of development and application of gas-fuel vehicles to accelerate. Large domestic engine plant and automobile plants such as Yuchai, on firewood, Weifang, east and liberation, and other manufacturers have launched their own products on the market, the gas engine application. 1988 China has introduced from Australia, New Zealand, Canada and other countries CNG filling stations full range of amenities, modified car parts and high-pressure cylinders, respectively station in Nanchong, Daqing and other places, opened a new era of development of CNG vehicles. Gas engine manufacturer | gas engines | Weifang Huadong gas engine provided by Weifang Huadong Engine Co., Ltd. Weifang Huadong Engine Co., Ltd. (www.hdchai.com) strong, credible, Shandong Weifang engine industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve Weifang Huadong innovative ideas will lead into the brilliant and you work for a better future!