Concept Generation

Concept

                 The concept of this idea is based on a thermal fluids theory.  The original idea for this problem was to measure the change in the back pressure using DP sensors in front of and behind the filter.  The addition of soot to the filter would restrict the air flow through the filter and lower the back pressure, giving a measurable phenomenon to correspond with the amount of soot in the filter.  Unfortunately, when the engine is at high speeds, soot comes into the filter at a quicker rate and collects at the rear of the filter.  This soot also has a higher density.  This disrupts the DP measurement.  This particular concept focuses on regulating the speed of the soot entering the filter.  By continuously diluting the flow of the diesel exhaust into the filter, you can almost assure all soot will be uniform and this allows for an accurate DP measurement.

Specifications

A Dilution System must be set up in the exhaust system before the filter and be capable of the following things:

· Monitoring the pressure of the exhaust gas entering the probe

· Monitoring the pressure of the exhaust gas exiting the probe

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Concept #2

Idea #2: Continuous Dilution Method

Cummins

Diesel Particulate Filter