Laser welded automotive diesel exhaust HC dosing valve
First Claim
1. Dosing structure for supplying diesel fuel to an exhaust passage 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 dosing valve constructed and arranged to receive fuel from the control valve and deliver the fuel to the exhaust passage,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, anda third welded joint between the extension tube and the dosing valve.
6 Assignments
0 Petitions
Accused Products
Abstract
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.
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Citations
18 Claims
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1. Dosing structure for supplying diesel fuel to an exhaust passage of a diesel system, the dosing structure comprising:
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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 dosing valve constructed and arranged to receive fuel from the control valve and deliver the fuel to the exhaust passage, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of providing a diesel dosing structure for supplying diesel fuel to an exhaust passage of a diesel system to reduce particulates in the exhaust passage, the method including the steps of:
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providing a dosing valve coupled to an exhaust passage of a diesel system and constructed and arranged to inject fuel into the exhaust passage, providing an electrically operated control valve associated with the dosing valve to supply diesel fuel to the dosing valve, welding a first end of an extension tube to the control valve and welding a second end of the extension tube to the dosing valve to space the control valve from the dosing valve such that heat generated in the exhaust passage is less at the control valve than at the dosing valve, welding an inlet tube to an inlet of the control valve, and providing a source of diesel fuel to the inlet tube and thus to the control valve so that the control valve can control an amount of diesel fuel through the extension tube to the dosing valve for injection into the exhaust passage. - View Dependent Claims (16, 17, 18)
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Specification