US 12,405,189 B2
System and method for unified sampling of particulate matter for reducing the dispersion of results in vehicle emissions tests
Antonio Carlos Scardini Villela, Rio de Janeiro (BR); Tadeu Cavalcante Cordeiro De Melo, Rio de Janeiro (BR); Juliano Pazello Chedid, Curitiba (BR); Dennis Rempel, Curitiba (BR); Luiz Carlos Corrêa, Curitiba (BR); Luiz Carlos Daemme, Curitiba (BR); Pedro Caffaro Vicentini, Rio de Janeiro (BR); and Renato De Arruda Penteado Neto, Curitiba (BR)
Assigned to Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR); and Instituto De Tecnologia Para O Desenvolvimento-LACTEC, Curitiba (BR)
Filed by Petróleo Brasileiro S.A.-Petrobras, Rio de Janeiro (BR); and Instituto De Tecnologia Para O Desenvolvimento-LACTEC, Curitiba (BR)
Filed on Dec. 15, 2022, as Appl. No. 18/081,845.
Claims priority of application No. 10 2021 025280 4 (BR), filed on Dec. 15, 2021.
Prior Publication US 2023/0184634 A1, Jun. 15, 2023
Int. Cl. G01N 1/22 (2006.01); G01N 1/38 (2006.01); G01N 15/06 (2006.01)
CPC G01N 1/2205 (2013.01) [G01N 1/2252 (2013.01); G01N 1/38 (2013.01); G01N 15/0618 (2013.01); G01N 2001/2255 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A sampling system of particulate matter for vehicle emission tests, the system comprising:
a probe configured to sample vehicle emissions carrying particulate matter, the probe directing the sampled particulate matter into a channel of a plurality of channels;
a filter holder positioned within at least one of the plurality of channels, wherein at least one of the plurality of channels does not include a filter holder;
valves arranged and configured to direct the vehicle emissions into a specified channel of the plurality of channels;
a sampling pump configured to flow the vehicle emissions through at least one channel of the plurality of channels; and
a mass flow meter arranged to receive the vehicle emissions from the plurality of channels;
a balloon configured to reduce pulsations in the mass flow meter caused by the sampling pump;
a cylinder configured to reduce pulsations in the mass flow meter caused by the sampling pump; and
a return arranged to direct the flow to a constant volume sampler.