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Method and apparatus for the high Mach injection of a gaseous fuel into an internal combustion engine
Method and apparatus for the high Mach injection of a gaseous fuel into an internal combustion engine
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机译：用于高马赫数将气态燃料喷射到内燃机中的方法和设备
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摘要
A gaseous fuel injection system for a cylinder of an internal combustion engine assures uniform mixing of the gaseous fuel with an air stream being inducted into the cylinder by injecting the gaseous fuel into the air stream at a relatively high velocity, preferably of between a Mach number of 0.5 and a Mach number of 1.0. High Mach injection can be achieved in a remarkably simple and effective manner by 1) using a single or at most a few injection conduit(s) and discharge orifice(s) for each intake port as opposed to a configuration having multiple discharge orifices at a single point in the air intake system upstream of the intake manifold, 2) by setting the relative effective flow areas of the injector metering orifice C.sub.d A1 and conduit discharge orifice C.sub. d A2 such that C.sub.d A2 is between 2 and 5 times greater than C.sub.d A1, and by 3) setting the gas supply pressure to be more than four times the air intake manifold absolute pressure. The resulting system is not only simpler and less expensive than supply systems having a high number of discharge orifices at a single upstream point, but also provides more uniform mixing and permits pulsating injection so that a stratified fuel charge can be supplied to the cylinders.
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机译：用于内燃机气缸的气态燃料喷射系统通过以相对较高的速度，优选在马赫数之间的速度将气态燃料喷射到空气流中，从而确保气态燃料与被引入气缸中的气流的均匀混合。为0.5，马赫数为1.0。高马赫数的喷射可以通过以下方式以非常简单和有效的方式实现：1）与每个进气口使用单个或至多几个喷射导管和一个或多个排气孔相比，在进气口处具有多个排气孔的配置2）通过设置喷油器节流孔Cd A1和导管排出孔C的相对有效流通面积，在进气歧管上游的进气系统中形成单点。 d A2使得C d A2为C d A1的2至5倍，并通过3）将供气压力设置为进气歧管绝对压力的四倍以上。所形成的系统不仅比在单个上游点处具有大量排出口的供应系统更简单，更便宜，而且提供了更均匀的混合并允许脉冲喷射，从而可以将分层的燃料装料提供给气缸。
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