Verfahren und Vorrichtung zum Zuführen von Wasser zu einem Tank einer Abgasanlage mit Abgasnachbehandlung für einen Verbrennungsmotor

Details

Veröffentlichungs-Nr.

EP3372799

Aktenzeichen

EP18160597

Anmeldetag

7. März 2018

Veröffentlichung

23. Oktober 2019

Erteilung

23. Oktober 2019

Rechtsraum

EP

IPC

F01N3/20B01D53/94G01F11/00G01F11/46

Abstract

An exhaust system (1) provided with exhaust gas aftertreatment for a combustion engine (2) comprising an exhaust pipe (3) and a pumping device (11), which is buried inside the tank (10), from which it draws so as to feed a water solution of urea under pressure to an electromagnetic injector (13); the tank (10) is supplied with urea powder and water, which are mixed on the inside so as to obtain a water solution of urea with a variable concentration; and a water supply circuit (28) to supply water to the tank (10), which is provided with a first pipe (29), which draws the water from a basin (30) and is regulated by a first valve (33), which allows water to be introduced into the tank (10), if necessary, or to be drained to the surrounding environment when the water quantity already contained in the tank (10) is sufficient. SCR exhaust gas purification system producing urea solution in one tank by mixing urea powder stored in one area and water stored in a second area together in a third mixing area, the rotating cylinder doses the amount of solid urea to the mix, as well as valves for the water, dependent on the determined concentration of the mixed urea solution. The pump is powered by a current which drives the electrical motor in an insufficient manner as to produce heat.

Anmelder

Firma

Magneti Marelli S.p.A.

Land

🇮🇹 Italien

Fachgebiete