| 摘要 |
<p>An EGR gas and intake air mixing system is proved to improve the mixing rate by optimizing the engine inlet manifold with larger injection area and a half bluff body arrangement is provided at the mixing chamber on the inlet manifold. The half bluff body arrangement is provided at a distance from the engine intake, and a pipe for injecting a portion of exhaust gas into the intake charge air is placed between the engine intake and the half bluff body arrangement, such that the injected exhaust gas mixes with the intake charge air and enters into the engine cylinder for combustion. The half bluff body arrangement provided in the intake manifold creates a low pressure region at the air duct and enables homogenous mixing of the exhaust gas and intake charge air and for uniform distribution of gases into all engine cylinders. The system achieves optimized manifold design and enables better EGR mass fraction to all cylinders at different speed levels of the engine, even during the part load conditions. FIG.5</p> |
