Description:Complete Specification

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] This invention relates to a dosing module, and more specifically to a multi-point dosing system for dosing AdBlue into an exhaust gas flow stream.

Background of the invention
[0002] CN 114354963 A describes a plating solution analysis system and a dosing device, which comprises a small-capacity automatic controllable precision injector, a large-capacity automatic controllable precision injector, a first automatic controllable multi-way valve, a second automatic controllable multi-way valve and a multi-port switching valve, and the small-capacity automatic controllable precision injector and the large-capacity automatic controllable precision injector can pass through the multi-port switching valve. And one of the public channel of the first automatic controllable multi-way valve and the public channel of the second automatic controllable multi-way valve is selected to be connected. The dosing device can fully utilize the configuration of the large injector and the small injector, so that the large injector and the small injector are responsible for filling liquid medicine with corresponding volumes, the dosing efficiency is higher, and the automatic analysis time is shortened. Moreover, the dosing device can fully utilize the number of channels of the first automatic controllable multi-way valve and the second automatic controllable multi-way valve, so that more samples can be automatically tested at one time.

Brief description of the accompanying drawing
[0003] Figure 1 illustrates a drawing depicting a multi-point dosing system for dosing AdBlue into an exhaust gas flow stream that flows from an engine.

Detailed description of the embodiments
[0004] Figure 1 illustrates a drawing depicting a multi-point dosing system 100 for dosing a reducing agent into an exhaust gas flow stream that flows from an engine. The multi-point dosing system 100 comprises a first reducing agent injector 110 coupled to a reducing agent dosing module, and at least one second reducing agent injector 120 coupled to a reducing agent dosing module. The at least one second reducing agent injector 120 is positioned at a pre-determined user defined angle with reference to the first reducing agent injector 110 to optimize a spray angle of reducing agent to an exhaust gas flow path that is in flow communication with the reducing agent dosing module.

[0005] Figure 1 illustrates a drawing depicting a multi-point dosing system 100 for dosing a reducing agent into an exhaust gas flow stream that flows from an engine. The multi-point dosing system 100 comprises a first reducing agent injector 110 that is coupled to the reducing agent dosing module. The first reducing agent injector 110 is adapted to inject pressurized reducing agent to an exhaust gas flow stream. More specifically, the first reducing agent injector 110 comprises a plurality of spray holes that are defined at an end of the nozzle of the first reducing agent injector 110. When a reducing agent is released from the supply module that is secured to the dosing module, the reducing agent from the supply module flows through the plurality of spray holes that are defined in the dosing module into the exhaust gas flow stream that is released from the engine. The reducing agent therein facilitates converting the oxides of carbon and nitrogen into carbon di-oxide, nitrogen di-oxide and water respectively. In an exemplary embodiment, the multi-point dosing system comprises a second reducing agent injector 120 that is coupled to the reducing agent dosing module. The second reducing agent injector 120 is adapted to inject pressurized reducing agent to an exhaust gas flow stream. More specifically, the second reducing agent injector 120 is positioned at a pre-determined user defined angle with reference to the first reducing agent injector 110 to optimize a spray angle of the reducing agent to the exhaust gas flow stream that is in flow communication with the reducing agent dosing module. Therefore, when the second reducing agent injector 120 is positioned at a pre-determined user defined angle with reference to the first reducing agent injector 110, the spray of reducing agent from the first reducing agent injector 110 and from the second reducing agent injector 120 occurs in sequence at the optimized user defined angle, and wherein the first reducing agent injector 110 and the second reducing agent injector 120 each deliver an equal quantity of reducing agent to the exhaust gas flow stream that flows from the outlet of the engine. More specifically, the second reducing agent injector 120 comprises a plurality of spray holes that are defined at an end of the nozzle of the second reducing agent injector 120. When a reducing agent is released from the supply module that is secured to the dosing module, the reducing agent from the supply module flows through the plurality of spray holes that are defined in the second reducing agent injector 120 that is positioned at the user defined angle with reference to the first reducing agent injector 110. Therefore, the spray of reducing agent through the first reducing agent injector 110 and through the second reducing agent injector 120 may be optimized to ensure that the reducing agent is delivered at optimum spray angles within the exhaust gas flow stream to ensure that the reducing agent is mixed optimally with the exhaust gas flowing through the exhaust gas flow path. In an exemplary embodiment, more than two reducing agent injectors may be deployed to optimally spray reducing agent into the exhaust gas flow stream.

[0006] In an exemplary embodiment, the first reducing agent injector 110 and the at least one second reducing agent injector 120 are in flow communication with an inlet of the reducing agent dosing module. Therefore, the first reducing agent injector 110 and the at least one second reducing agent injector 120 each receive pressurized fuel from the inlet of the reducing agent dosing module that is in flow communication with the outlet of the supply module. The reducing agent that is received in the first reducing agent injector 110 and the at least one second reducing agent injector 120 are each sprayed via spray holes of the first reducing agent injector 110 and via spray holes of the second reducing agent injector 120 into the exhaust gas flow stream, thereby reducing the oxides of carbon and nitrogen of the exhaust gas that flows through the exhaust gas flow stream.

[0007] In an exemplary embodiment, an electronic control unit 130 is in electronic communication with the first reducing agent injector 110 and with the at least one second reducing agent injector 120. More specifically, the electronic control unit 130 is adapted to activate the first reducing agent injector 110 and the at least one second reducing agent injector 120 in sequence to facilitate injecting reducing agent from the first reducing agent injector 110 and from the at least one second reducing agent injector 120 in sequence to the exhaust gas flow stream that flows through the exhaust gas flow path. The electronic control unit 130 transmits a first electronic signal to the first reducing agent injector 110 and a second electronic signal to the second reducing agent injector 120 to inject an equal quantity of reducing agent from the first reducing agent injector 110 and from the second reducing agent injector 120 respectively to an exhaust gas flow stream that flows through the exhaust gas flow path.

[0008] A working of the multi-point dosing system 100 for dosing a reducing agent into an exhaust gas flow stream that flows from an engine via the exhaust gas flow path is described as an example. When the reducing agent from the outlet of the supply module flows through the dosing module, the reducing agent is channeled from the outlet of the supply module to the first reducing agent injector 110. In addition, the reducing agent is channeled to the second reducing agent injector 120 that is positioned at a pre-determined user defined angle with reference to the first reducing agent injector 110. Therefore, the flow of reducing agent through the first reducing agent injector 110 and through at least one second reducing agent injector 120 is optimized in such as way that the reducing agent may be sprayed through the first reducing agent injector 110 as well as through the second reducing agent injector 120 optimally to facilitate injecting the reducing agent through the exhaust gas flow stream. In addition, the spray angle of reducing agent to the exhaust gas flow path that is in flow communication with the reducing agent dosing module is also optimized to ensure that the exhaust gas flow path is optimally dosed via different angles of the dosing module so that the exhaust gas may be effectively reduced.

[0009] It must be understood that the embodiments explained above are only illustrative and do not limit the scope of the disclosure. Many modifications in the embodiments with regard to dimensions of various components are envisaged and form a part of this invention. The scope of the invention is only limited by the scope of the claims.

, Claims:CLAIMS

We Claim

1. A multi-point dosing system (100) for dosing a reducing agent into an exhaust gas flow stream that flows from an engine, the multi-point dosing system (100) comprising:
a first reducing agent injector (110) coupled to a reducing agent dosing module; and
at least one second reducing agent injector (120) coupled to a reducing agent dosing module, wherein the at least one second reducing agent injector (120) is positioned at a pre-determined user defined angle with reference to the first reducing agent injector (110) to optimize a spray angle of reducing agent to an exhaust gas flow path that is in flow communication with the reducing agent dosing module.

2. The multi-point dosing system (100) for dosing the reducing agent into the exhaust gas flow stream that flows from the engine in accordance with Claim 1, wherein the first reducing agent injector (110) and the at least one second reducing agent injector (120) are in flow communication with an inlet of the reducing agent dosing module.

3. The multi-point dosing system (100) for dosing the reducing agent into the exhaust gas flow stream that flows from the engine in accordance with Claim 1, further comprising an electronic control unit (130) that is in electronic communication with the first reducing agent injector (110) and with the at least one second reducing agent injector (120), wherein the electronic control unit (130) is adapted to activate the first reducing agent injector (110) and the at least one second reducing agent injector (120) in sequence to facilitate injecting reducing agent from the first reducing agent injector (110) and from the at least one second reducing agent injector (120) in sequence to the exhaust gas flow path.

4. The multi-point dosing system (100) for dosing the reducing agent into the exhaust gas flow stream that flows from the engine in accordance with Claim 3, wherein the electronic control unit (130) that is in electronic communication with the first reducing agent injector (110) and with the at least one second reducing agent injector (120) transmits a first electronic signal to the first reducing agent injector (110) and a second electronic signal to the second reducing agent injector (120) to inject an equal quantity of reducing agent from the first reducing agent injector (110) and from the second reducing agent injector (120) to an exhaust gas flow stream.