Interconnection system of a urea-based reducing agent injector to an after-treatment an exhaust gas device
AssigneeFpt Industrial S.P.A.
InventorsMarco Federico Pidria, Luca Vargiu, Giuseppe Inghilterra, Gemma Damiani, Felice Carlo Nuovo, Andrea Renzullo
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Abstract
System for interconnecting a urea-based reducing agent injector to an exhaust gas post-treatment device including an injector, a flange arranged to couple the injector to an exhaust gas line, a gasket arranged between the injector and the flange, wherein the gasket is a sandwich, formed by two external layers and an intermediate layer formed by insulating material.
Claims18
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.
A gasket for an interconnection of a urea-based reducing agent injector and a flange for a connection to an exhaust gas duct, the gasket comprising:
- metal first and third external layers;
- and
- an intermediate layer disposed between the first and third external layers,
- wherein the gasket, in operating conditions, is configured to be arranged between the injector and the flange, wherein the gasket is a sandwich formed by the metal first and third external layers and the 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, which is configured to be 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 for fixing the injector to the flange.
Dependencies are inferred from the claim text.