US 12,286,914 B2
Interconnection system of a urea-based reducing agent injector to an after-treatment an exhaust gas device
Marco Federico Pidria, Turin (IT); Luca Vargiu, Turin (IT); Giuseppe Inghilterra, Turin (IT); Gemma Damiani, Turin (IT); Felice Carlo Nuovo, Turin (IT); and Andrea Renzullo, Turin (IT)
Assigned to FPT INDUSTRIAL S.P.A, Turin (IT)
Appl. No. 18/549,601
Filed by FPT INDUSTRIAL S.P.A, Turin (IT)
PCT Filed Mar. 7, 2022, PCT No. PCT/IB2022/051987
§ 371(c)(1), (2) Date Sep. 8, 2023,
PCT Pub. No. WO2022/195397, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 102021000006143 (IT), filed on Mar. 15, 2021.
Prior Publication US 2025/0027438 A1, Jan. 23, 2025
Int. Cl. F01N 13/18 (2010.01); F01N 3/20 (2006.01)
CPC F01N 13/1855 (2013.01) [F01N 3/2066 (2013.01); F01N 13/1872 (2013.01); F01N 2260/20 (2013.01); F01N 2310/02 (2013.01); F01N 2450/24 (2013.01); F01N 2530/26 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1453 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for interconnecting a urea-based reducing agent injector to an exhaust gas after-treatment device, wherein the system comprises;
one injector;
a flange arranged to couple a body of the injector to an exhausted gas duct and having a through opening designed to surround the injector; and
a gasket, in operating conditions, is arranged between the injector and the flange, wherein the gasket is a sandwich formed by metal first and third external layers and an intermediate layer disposed between the first and third external layers, wherein the intermediate layer is composed of a solid heat-insulating material, wherein the third layer, in contact with the flange, is shaped to confine an air volume surrounding the injector, and wherein the solid heat-insulating material extends across the gasket and includes, at a periphery of the gasket, closed through holes through which the injector is fixed to the flange.