Laser welded automotive diesel exhaust HC dosing valve
View Patent ↗Dosing structure ( 30 ) supplies diesel fuel to an exhaust passage of a diesel system. The dosing structure includes an electrically operated control valve ( 31 ). An inlet tube ( 45 ) is coupled with an inlet of the control valve. A first welded joint ( 6 ) is between the inlet tube and the control valve. The inlet tube is constructed and arranged to be coupled to a supply of diesel fuel for feeding fuel to the control valve. A dosing valve ( 32 ) is constructed and arranged to receive fuel from the control valve and deliver the fuel to the exhaust passage. An extension tube ( 33 ) is fluidly coupled between the control valve and the dosing valve to space the control valve from the dosing valve. A second welded joint ( 62 ) is between the extension tube and the control valve and a third welded joint ( 64 ) is between the extension tube and the dosing valve.
1. Dosing structure for supplying diesel fuel to an exhaust stream of a diesel system, the dosing structure comprising: an electrically operated control valve, an inlet tube coupled with an inlet of the control valve, a first welded joint between the inlet tube and the control valve, the inlet tube being constructed and arranged to be coupled to a supply of diesel fuel for feeding fuel to the control valve, a fluid pressure operated dosing valve constructed and arranged to receive fuel from the control valve and having structure movable from a closed position to an open position to deliver the fuel to the exhaust stream, an extension tube fluidly coupled between the control valve and the dosing valve to space the control valve from the dosing valve and to permit fuel to be delivered from the control valve, through the extension tube, and to the dosing valve, a second welded joint between the extension tube and the control valve, and a third welded joint between the extension tube and the dosing valve; a bracket associated with the control valve for mounting the control valve, the bracket including a pair of clips, one of the clips being coupled to the inlet tube and another clip being coupled to the control valve near the extension tube.
2. Dosing structure for supplying diesel fuel to an exhaust stream of a diesel system, the dosing structure comprising: an electrically operated control valve, an inlet tube coupled with an inlet of the control valve, a first welded joint between the inlet tube and the control valve, the inlet tube being constructed and arranged to be coupled to a supply of diesel fuel for feeding fuel to the control valve, a fluid pressure operated dosing valve constructed and arranged to receive fuel from the control valve and having structure movable from a closed position to an open position to deliver the fuel to the exhaust stream, an extension tube fluidly coupled between the control valve and the dosing valve to space the control valve from the dosing valve and to permit fuel to be delivered from the control valve, through the extension tube, and to the dosing valve, a second welded joint between the extension tube and the control valve, and a third welded joint between the extension tube and the dosing valve; the dosing valve having a cap that is constructed and arranged to be in threaded engagement with a portion of an exhaust passage that contains the exhaust stream.