缸内双直喷系统压燃式发动机燃用甲醇和乙醇的性能比较

Performance Comparison Between Diesel-Methanol Injection and Diesel-Ethanol Injection with Dual Injection System in a DI Compression Ignition Engine

在双喷射系统的压燃式发动机中,用一个喷射器喷射乙醇或甲醇作为主要燃料,另一个喷射器喷射作为引燃着火源的柴油,开展了负荷特性下的性能和排放试验。试验结果表明,在相同功率下,燃用乙醇的发动机比燃用甲醇的发动机燃油经济性要好,但其NOx、烟度、THC和CO的排放较高。

Performance, fuel consumption and exhaust emissions under constant speed and variable load conditions were experimentally investigated in a direct injection compression ignition (CI) engine with dual Injection systems, where methanol and/or ethanol being injected as main fuel and diesel being injected as the ignition fuel. The experimental results show that diesel ignited ethanol CI engine has better equivalent fuel consumption, higher NOx and smoke emissions and higher CO and THC emissions than those of diesel ignited methanol CI engine for the same power output condition.