SAE Update - March 2022 - 29

Corning Inc.
ENGINEERING EVENTS
INLET
CHANNEL
POROUS
WALL
OUTLET
CHANNEL
CAPTURED SOOT
PARTICLES
ENGINE-OUT
EXHAUST
CLEAN TAILPIPE
EXHAUST
Corning DuraTrap GC filters (OPPOSITE PAGE) and a channel-scale schematic of how filters work (ABOVE).
regulations that enforce the use of
" gasoline particulate filters, " or GPFs, on
modern light-duty cars and trucks, resulting
in deep reductions of tailpipe emissions.
The U.S., traditionally the world leader in
setting tailpipe standards, is unfortunately
lagging on this topic. Current mass-based
standards do not enforce GPFs. This has
resulted in similar vehicle models being
sold in Europe and China with filters and in
the U.S. without filters. Upcoming
regulations will hopefully resolve this
situation.
GPFs are very similar to diesel filters in
their fundamental operating principle, but
with material and porosity design changes
implemented to account for the application
differences.
As seen in the figure on page 28, the
filter is a honeycomb structure with
UPDATE
channels plugged in a checkerboard
pattern at alternate ends. These plugged
channels force the gas to flow across the
porous walls, which collect soot and ash.
These " wall-flow " filters are mostly made
of cordierite, as this material offers
excellent thermal shock resistance and
quick heat-up. They are added either in the
" close-coupled " or " underfloor " position,
which refers to the distance from the
engine, and can either be deployed in the
bare state or catalyzed with a three-way
catalyst coating to enable gas conversion
in addition to high filtration.
Accordingly, Corning has introduced two
families of GPFs: DuraTrap GC filters with
~55% porosity and 200/8 cell design for
uncatalyzed applications, and DuraTrap GC
HP filters with a high porosity of ~65% and
a 300/8 cell design for catalyzed
March 2022
29

SAE Update - March 2022

Table of Contents for the Digital Edition of SAE Update - March 2022

SAE Update - March 2022 - Cov1
SAE Update - March 2022 - Cov2
SAE Update - March 2022 - 1
SAE Update - March 2022 - 2
SAE Update - March 2022 - 3
SAE Update - March 2022 - 4
SAE Update - March 2022 - 5
SAE Update - March 2022 - 6
SAE Update - March 2022 - 7
SAE Update - March 2022 - 8
SAE Update - March 2022 - 9
SAE Update - March 2022 - 10
SAE Update - March 2022 - 11
SAE Update - March 2022 - 12
SAE Update - March 2022 - 13
SAE Update - March 2022 - 14
SAE Update - March 2022 - 15
SAE Update - March 2022 - 16
SAE Update - March 2022 - 17
SAE Update - March 2022 - 18
SAE Update - March 2022 - 19
SAE Update - March 2022 - 20
SAE Update - March 2022 - 21
SAE Update - March 2022 - 22
SAE Update - March 2022 - 23
SAE Update - March 2022 - 24
SAE Update - March 2022 - 25
SAE Update - March 2022 - 26
SAE Update - March 2022 - 27
SAE Update - March 2022 - 28
SAE Update - March 2022 - 29
SAE Update - March 2022 - 30
SAE Update - March 2022 - 31
SAE Update - March 2022 - 32
SAE Update - March 2022 - 33
SAE Update - March 2022 - 34
SAE Update - March 2022 - 35
SAE Update - March 2022 - 36
SAE Update - March 2022 - 37
SAE Update - March 2022 - 38
https://www.nxtbook.com/smg/sae/24UPD12
https://www.nxtbook.com/smg/sae/24UPD11
https://www.nxtbook.com/smg/sae/24UPD10
https://www.nxtbook.com/smg/sae/24UPD09
https://www.nxtbook.com/smg/sae/24UPD08
https://www.nxtbook.com/smg/sae/24UPD07
https://www.nxtbook.com/smg/sae/24UPD06
https://www.nxtbook.com/smg/sae/24UPD05
https://www.nxtbook.com/smg/sae/24UPD04
https://www.nxtbook.com/smg/sae/24UPD03
https://www.nxtbook.com/smg/sae/24UPD02
https://www.nxtbook.com/smg/sae/24UPD01
https://www.nxtbook.com/smg/sae/23UPD12
https://www.nxtbook.com/smg/sae/23UPD11
https://www.nxtbook.com/smg/sae/23UPD10
https://www.nxtbook.com/smg/sae/23UPD09
https://www.nxtbook.com/smg/sae/23UPD08
https://www.nxtbook.com/smg/sae/23UPD07
https://www.nxtbook.com/smg/sae/23UPD06
https://www.nxtbook.com/smg/sae/23UPD05
https://www.nxtbook.com/smg/sae/23UPD04
https://www.nxtbook.com/smg/sae/23UPD03
https://www.nxtbook.com/smg/sae/23UPD02
https://www.nxtbook.com/smg/sae/23UPD01
https://www.nxtbook.com/smg/sae/22UPD12
https://www.nxtbook.com/smg/sae/22UPD11
https://www.nxtbook.com/smg/sae/22UPD10
https://www.nxtbook.com/smg/sae/22UPD09
https://www.nxtbook.com/smg/sae/22UPD08
https://www.nxtbook.com/smg/sae/22UPD07
https://www.nxtbook.com/smg/sae/22UPD06
https://www.nxtbook.com/smg/sae/22UPD05
https://www.nxtbook.com/smg/sae/22UPD04
https://www.nxtbook.com/smg/sae/22UPD03
https://www.nxtbook.com/smg/sae/22UPD02
https://www.nxtbook.com/smg/sae/22UPD01
https://www.nxtbook.com/smg/sae/21UPD12
https://www.nxtbook.com/smg/sae/21UPD11
https://www.nxtbook.com/smg/sae/21UPD10
https://www.nxtbook.com/smg/sae/21UPD09
https://www.nxtbook.com/smg/sae/21UPD08
https://www.nxtbook.com/smg/sae/21UPD07
https://www.nxtbook.com/smg/sae/21UPD06
https://www.nxtbook.com/smg/sae/21UPD05
https://www.nxtbook.com/smg/sae/21UPD04
https://www.nxtbook.com/smg/sae/21UPD03
https://www.nxtbook.com/smg/sae/21UPD02
https://www.nxtbookmedia.com