CNG Engine And Vehicle Performance Development Research

In the global scope, in order to compressed natural gas (CNG) gas automobile fuel has a history of over70years. The earliest compressed natural gas (CNG) station is an Italian built in1931, followed by many countries in the world began in the fuel gas automobile technology to explore. China began developing car burning gas is a marker of1988in Sichuan Nanchong established the first gas station. As of November last year, China has built more than730stations, modification of car nearly300000vehicles.At present, the gas is still the mainstream of world automobile alternate fuel, alternative fuel vehicles in China for about90%. The United States is the goal, the bus has7%cars use natural gas,50%of the taxi and bus as special natural gas vehicles; German natural gas vehicle quantity will reach100000to400000vehicles, stations will be from the current180to at least300seat. Alternative fuel is reduced and eventually eliminated due to oil supply brought about by pressure as well as the economic development have a negative effect on the. The near future, China will still be the main use of compressed natural gas, liquefied petroleum gas, ethanol gasoline for automobile alternate fuel. Substitute fuel for automobile can expand the application, depending on the Chinese alternative fuel resources, distribution, availability, alternative fuel production and application technology development and the environmental pollution is reduced; alternative fuel production scale, investment, production cost, price decided its and petroleum fuel competitiveness; automobile production structure and design improvement we must adapt and fuel. With gas instead of fuel oil will be China and the world automobile development inevitable trend. In consideration of China’s energy security is the main oil gas development status, including cars, all kinds of alternative fuel vehicles, is the brook no delay.In tianjin faw xiali co., LTD. This paper provides the CA4GA11.3L engine by adopting the combination of experiment and theoretical analysis on the way. Use theory to guide the test, and solve the problems in the process of the test. Theoretical analysis mainly includes the analysis of existing research results, the analysis of the natural gas supply system, design calculation and test results of compression ratio and external characteristic analysis, the engine combustion process analysis, the establishment of a gas engine dedicated test platform, the analysis is suitable for natural gas engine combustion system, through the adjustment and optimization of ignition advance Angle, excess air coefficient and the jet moment of CNG engine performance, fuel economy and emission performance, improves the overall performance of CNG engine. CNG single fuel engine electronic control development, the analysis of electric control system and the result of ECUhardware, calibration and external characteristic experiment was carried out. CNG dedicated the development of catalysts and catalytic conversion method and the study process analysis, analysis of test results is performed. On the vehicle dynamic performance at the same time, has carried on the experimental analysis and emissions, improve the natural gas engine performance and fuel economy.