Low Cost Single Piece EGR Mixing Solution
Publication Date: 2016-Feb-22
The IP.com Prior Art Database
Page 01 of 3
Title: Low Cost Single Piece EGR Mixing Solution
Brief Description of the Drawings: Figure 1 is a perspective view of a fluid mixer apparatus of an EGR system and schematically illustrates the mixing of an engine intake air flow and recirculated exhaust gas airflow. Figure 2 is an end view of the fluid mixer apparatus of Figure 1.
Description: As shown in the attached illustrations and described below, a single piece EGR mixer apparatus that effectively mixes an exhaust gas stream and a fresh air stream without a significant pressure loss, is disclosed.
Most internal combustion engines have some type of emission control device and system. One common type of control system is an exhaust gas recirculation (EGR) system that recirculates a portion of the exhaust gas from an exhaust system to an intake system of the engine.
Mixing exhaust gas with engine intake air generally increases the specific heat capacity of the air/exhaust mixture, thereby lowering the peak combustion temperature. Lowering the combustion temperature limits the generation of NOx, which is prevalent when nitrogen and oxygen are subjected to high temperatures inside an engine. As a result, EGR systems are used to reduce combustion temperatures and NOx emissions, and improve overall engine performance.
An engine having an EGR system has a junction in the air intake system where the EGR gas and the intake air mix to form a mixture. This mixture of exhaust gas and intake air is consumed during engine operation.
Many methods devised in the past were intended to improve mixing of exhaust gas with intake air for engines having an EGR system. These methods typically use flow obstructions that increase turbulence in the intake air, the exhaust gas, or the mixture of intake air and exhaust gas, to improve the homogeneity of ...