Dual-fuel diesel injector study

天然气由于其清洁燃烧的特性和在北美的丰富储量，正迅速成为一种可行的交通替代燃料。Westport Innovations是世界上最大的汽车内燃机天然气技术开发商之一。Westport率先为重型天然气卡车行业设计了高压直喷（HPDI）压缩点火发动机。西港在温哥华有一个正在进行的研究和开发项目。测试设备包括高压室，用于表征后压缩压力下的柴油喷雾。该公司缺乏在高压和高温大气中表征燃油喷射的设备，更重要的是，缺乏在原型压缩后柴油条件下天然气和空气混合物点火的设备。该项目的目的是开发实验室设备，用于研究柴油喷射预混合高压高温天然气和空气的点火。Westport特别感兴趣的是与最低负荷相对应的混合条件，低于最低负荷，要么天然气无法燃烧，要么柴油先导不会点燃。该设备随后将提供给Westport，用于未来的注入器开发和测试。

Natural gas is quickly becoming a viable alternative fuel for transportation because of its clean burningcharacteristics and its abundance in North America. Westport Innovations is one of the world's largestdevelopers of natural gas technologies for vehicle internal combustion engines. Westport pioneered highpressure direct injection (HPDI) compression ignition engine designed for the heavy duty natural gas truckingsector. Westport has an ongoing research and development program at its Vancouver location. Test equipmentincludes high pressure chambers used to characterize diesel fuel spray at post compression pressure. Thecompany lacks equipment to characterize fuel spray in a high pressure and temperature atmosphere, and moreimportantly the ignition of a mixture of natural gas and air at prototypic post compression diesel conditions.The objective of this project is to develop laboratory equipment that can be used to study the ignition of apremixed high pressure and temperature mixture of natural gas and air by diesel injection. Of specific interestto Westport are mixture conditions corresponding to minimum load, below which either the natural gas is toolean to burn or the diesel pilot will not ignite. The equipment will subsequently be available to Westport forfuture injector development and testing.