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 pressure regulator, and more specifically to the pressure regulator for a supply module of a reducing agent.

Background of the invention
[0002] IN Patent Application Number IN02606CHE2011 A describes a pump assembly for dosing a reducing agent in an exhaust channel of an internal combustion engine. The invention proposes a pump assembly for transporting the reducing agent. The pump assembly comprises a housing 12, a pump 14, a valve block 16, an inlet 18 and an outlet 20. The inlet 18 of the pump assembly is connected to a reservoir. The reservoir stores the reducing agent. The outlet of the pump assembly is connected to a dosing unit. The dosing unit is located in the exhaust channel of the engine. A controller 22 controls the valve block 16 depending upon the strokes of the pump 14. The pump 14 has a single port 24 which acts as an inlet as well as an outlet. During a dosing cycle, the controller connects the reservoir to the pump chamber during suction stroke and connects the pump chamber to the dosing unit during delivery stroke, through the valve block. During a purge cycle, the controller connects the dosing unit to the pump chamber during a suction stroke, and connects the pump chamber to the reservoir during delivery stroke, through the valve block.

Brief description of the accompanying drawings
[0003] Figure 1 illustrates a pressure regulator for a supply module of a reducing agent in one embodiment of the invention.
[0004] Figure 2 illustrates the pressure regulator for the supply module of the reducing agent in another embodiment of the invention.
[0005] Figure 3 illustrates the pressure regulator for the supply module of the reducing agent in another embodiment of the invention.

Detailed description of the embodiments
[0006] Figure 1 illustrates a pressure regulator 100 for a supply module of a reducing agent in one embodiment of the invention. The pressure regulator 100 comprises a reducing agent inlet supply path 120 in flow communication with a pump module 130 and adapted to receive a reducing agent from the pump module 130. A reducing agent outlet supply path 140, an upstream end 150 of the reducing agent outlet supply path 140 is in flow communication with the reducing agent inlet supply path 120 and adapted to receive the reducing agent from the reducing agent inlet supply path 120. A downstream end 160 of the reducing agent outlet supply path 140 is in flow communication with a dosing module (not shown) and adapted to deliver the reducing agent to the dosing module. A solenoid valve 170 is in flow communication with the reducing agent inlet supply path 120 and in flow communication with the reducing agent outlet supply path 140, the solenoid valve 170 adapted to regulate a flow of reducing agent from the reducing agent inlet supply path 120 to the reducing agent outlet supply path 140.

[0007] Figure 1 illustrates a pressure regulator 100 for a supply module 110 of a reducing agent in one embodiment of the invention. The pressure regulator 100 for the supply module 110 of the reducing agent comprises a reducing agent inlet supply path 120 that is in flow communication with a pump module 130. More specifically, the pressurized reducing agent that is received from the pump module 130 is allowed to flow through the reducing agent inlet supply path 120 that is in flow communication with the pump module 130.

[0008] The pressure regulator 100 for the supply module 110 of the reducing agent comprises a reducing agent outlet supply path 140. An upstream end 150 of the reducing agent outlet supply path 140 is in flow communication with the reducing agent inlet supply path 120 and is adapted to receive the reducing agent that flows through the reducing agent inlet supply path 120. A downstream end 160 of the reducing agent outlet supply path 140 is in flow communication with a dosing module (not shown) and is adapted to deliver the reducing agent to the dosing module. From the dosing module, the reducing agent may be dosed into an exhaust gas flow path containing exhaust gas that flows from an internal combustion engine. In an exemplary embodiment, a solenoid valve 170 is in flow communication with the reducing agent inlet supply path 120 as well as in flow communication with the reducing agent outlet supply path 140. More specifically, the solenoid valve 170 is adapted to regulate a pressure as well as the volume of reducing agent that flows from the reducing agent inlet supply path 120 to the reducing agent outlet supply path 140 past the solenoid valve 170.

[0009] In an exemplary embodiment, the solenoid valve 170 comprises a spring chamber 180 that houses a spring member 190 therein. The first end 183 of the spring member 190 is positioned against an end of the spring chamber 180 such that the spring member 190 compresses against the spring chamber 180 when a compressive force is applied on the spring member 190. A solenoid coil 185 is positioned against an opposite second end 184 of the spring member 190 and applies a compressive force on the spring member 190. In the exemplary embodiment, at least one magnet 191 is positioned proximate to the solenoid coil 185 and is adapted to actuate the solenoid coil 185. More specifically, when electric power is supplied to the at least one magnet 191, the at least one magnet 191 is adapted to be energized. Similarly, when electric power is disengaged from the at least one magnet 191, the at least one magnet 191 is adapted to be deenergized. When the at least one magnet 191 is energized, the at least one magnet 191 is adapted to energize the solenoid coil 185 to compress against the spring member 190, thereby connecting the reducing agent inlet supply path 120 and the reducing agent outlet supply path 140, thereby permitting a flow of reducing agent from the reducing agent inlet supply path 120 to the reducing agent outlet supply path 140 past the solenoid valve 170. Similarly, when the at least one magnet 191 is deenergized, the at least one magnet 191 is adapted to deenergize the solenoid coil 185 to return to its original position, thereby disengaging the reducing agent inlet supply path 120 from the reducing agent outlet supply path 140, thereby disconnecting the flow of reducing agent from the reducing agent inlet supply path 120 to the reducing agent outlet supply path 140 via the solenoid valve 170.

[0010] In an exemplary embodiment, a plunger 111 is secured to the solenoid coil 185 and is adapted to be actuated in response to an actuation of the solenoid coil 185. Therefore, the plunger 111 that is secured to the solenoid coil 185 is actuated when the at least one magnet 191 is energized. Conversely, the plunger 111 that is secured to the solenoid coil 185 and is adapted to be deactuated in response to a deenergizing of the at least one magnet 191. Therefore, the plunger 111 that is secured to the solenoid coil 185 is deactuated when the at least one magnet 191 is deenergized. A diaphragm 157 secured to an end of the plunger 111 and is adapted to close the reducing agent outlet supply path 140. More specifically, the diaphragm 157 is adapted to be actuated when the plunger 111 is actuated and correspondingly deactuated when the plunger 111 is deactuated. Therefore, the diaphragm 157 that is secured to an end of the plunger 111 is actuated when the at least one magnet 191 is energized and conversely deactuated when the at least one magnet 191 is deenergized. Consequently, the diaphragm 157 closes the reducing agent outlet supply path 140 when the diaphragm/plunger 157/111 is actuated and the diaphragm 157 opens the reducing agent outlet supply path 140 when the diaphragm/plunger 157/111 is deactuated.

[0011] In an exemplary embodiment, an electronic control unit 123 is in electronic communication with the at least one magnet 191. The electronic control unit 123 is adapted to activate the at least one magnet 191 to facilitate energizing the solenoid coil 185. Conversely, the electronic control unit 123 is adapted to deactivate the at least one magnet 191 to facilitate deenergizing the solenoid coil 185. When the pressure of the reducing agent in the reducing agent outlet supply path 140 is above a threshold limit that is pre-determined by a user, the pressure sensor transmits an electronic signal to the electronic control unit 123 via a control flow path. Therein, the electronic control unit 123 is adapted to activate the at least one magnet 191 to facilitate energizing the rotary solenoid coil 185 and vice versa.

[0012] Figure 2 illustrates the pressure regulator 200 for the supply module 210 of the reducing agent in another embodiment of the invention. The pressure regulator 200 for the supply module 210 of the reducing agent comprises a reducing agent inlet supply path 220 that is in flow communication with the pump module 230. More specifically, the pressurized reducing agent that is received from the pump module 230 is allowed to flow through the reducing agent inlet supply path 220 that is in flow communication with the pump module 230.

[0013] The pressure regulator 200 for the supply module 210 of the reducing agent comprises a reducing agent outlet supply path 240. An upstream end 250 of the reducing agent outlet supply path 240 is in flow communication with the reducing agent inlet supply path 220 and is adapted to receive the reducing agent that flows through the reducing agent inlet supply path 220. A downstream end 260 of the reducing agent outlet supply path 240 is in flow communication with the dosing module (not shown) and is adapted to deliver the reducing agent to the dosing module. From the dosing module, the reducing agent may be dosed into an exhaust gas flow path containing exhaust gas that flows from the internal combustion engine. In an exemplary embodiment, a rotary solenoid valve 270 is in flow communication with the reducing agent inlet supply path 220 as well as in flow communication with the reducing agent outlet supply path 240. More specifically, the rotary solenoid valve 270 is adapted to regulate a pressure and quantity of reducing agent that flows from the reducing agent inlet supply path 220 to the reducing agent outlet supply path 240 past the rotary solenoid valve 270.

[0014] In an exemplary embodiment, the rotary solenoid valve 270 comprises a chamber 280. In the exemplary embodiment, at least one magnet 291 is positioned proximate to the rotary solenoid coil 285 and is adapted to energize the rotary solenoid coil 285. More specifically, when electric power is supplied to the at least one magnet 291, the at least one magnet 291 is adapted to be energized. Similarly, when electric power is disengaged from the at least one magnet 291, the at least one magnet 291 is adapted to be deenergized. When the at least one magnet 291 is energized, the at least one magnet 291 is adapted to energize the rotary solenoid coil 285 to connect the reducing agent inlet supply path 220 and the reducing agent outlet supply path 240, thereby permitting a flow of reducing agent from the reducing agent inlet supply path 220 to the reducing agent outlet supply path 240 past the rotary solenoid valve 270. Similarly, when the at least one magnet 291 is deenergized, the at least one magnet 291 is adapted to deenergize the rotary solenoid coil 285 to disengage the reducing agent inlet supply path 220 from the reducing agent outlet supply path 240, thereby disconnecting the flow of reducing agent from the reducing agent inlet supply path 220 to the reducing agent outlet supply path 240 and past the rotary solenoid valve 270.

[0015] In an exemplary embodiment, a lead screw 211 is secured to the rotary solenoid coil 285 and is adapted to be extended in response to an actuation of the rotary solenoid coil 285 by the magnet 291. Therefore, the lead screw 211 that is secured to the rotary solenoid coil 285 is extended when the at least one magnet 291 is energized. More specifically, when the at least one magnet 291 is energized, the lead screw 211 that is secured to the rotary solenoid coil 285 is rotated, thereby causing the lead screw 211 to extend. Conversely, the lead screw 211 that is secured to the rotary solenoid coil 285 is adapted to be retracted by rotation in response to a deenergizing of the rotary solenoid coil 285 by the magnet 291. Therefore, the lead screw 211 that is secured to the rotary solenoid coil 285 is rotated and hence retracted when the at least one magnet 291 is deenergized. A diaphragm 257 is secured to an end of the lead screw 211 and is adapted to close the reducing agent outlet supply path 240. More specifically, the diaphragm 257 is adapted to be actuated when the lead screw 211 is extended, and deactuated when the lead screw 211 is retracted by rotation. Therefore, the diaphragm 257 that is secured to an end of the lead screw 211 is actuated when the at least one magnet 291 is energized and conversely deactuated when the at least one magnet 291 is deenergized. Consequently, the diaphragm 257 disconnects the reducing agent outlet supply path 240 from the reducing agent inlet supply path 220 when the diaphragm 257/lead screw 211 is activated/extended and the diaphragm 257 connects the reducing agent outlet supply path 240 to the reducing agent inlet supply path 220 when the diaphragm 257/lead screw 211 is deactivated/retracted.

[0016] In an exemplary embodiment, the electronic control unit 223 is in electronic communication with the at least one magnet 291. The electronic control unit 223 is adapted to activate the at least one magnet 291 to facilitate energizing the rotary solenoid coil 285. Conversely, the electronic control unit 223 is adapted to deactivate the at least one magnet 291 to facilitate deenergizing the rotary solenoid coil 285. In an exemplary embodiment, a pressure sensor (not shown) is in flow communication with the reducing agent outlet supply path 240. When the pressure of the reducing agent in the reducing agent outlet supply path 240 is above a threshold limit that is pre-determined by a user, the pressure sensor transmits an electronic signal to the electronic control unit 223 via a control flow path. Therein, the electronic control unit 223 is adapted to activate the at least one magnet 291 to facilitate energizing the rotary solenoid coil 285 and vice versa.

[0017] Figure 3 illustrates the pressure regulator 300 for the supply module 310 of the reducing agent in another embodiment of the invention. The pressure regulator 300 for the supply module 310 of the reducing agent comprises a reducing agent inlet supply path 320 that is in flow communication with the pump module 330. More specifically, the pressurized reducing agent that is received from the pump module 330 is allowed to flow through the reducing agent inlet supply path 320 that is in flow communication with the pump module 330.

[0018] The pressure regulator 300 for the supply module 310 of the reducing agent comprises a reducing agent outlet supply path 340. An upstream end 350 of the reducing agent outlet supply path 340 is in flow communication with the reducing agent inlet supply path 320 and is adapted to receive the reducing agent that flows through the reducing agent inlet supply path 320. A downstream end 360 of the reducing agent outlet supply path 340 is in flow communication with the dosing module and is adapted to deliver the reducing agent to the dosing module. From the dosing module, the reducing agent may be dosed into an exhaust gas flow path containing exhaust gas that flows from the internal combustion engine. In an exemplary embodiment, a servo-motor actuated valve 370 is in flow communication with the reducing agent inlet supply path 320 as well as in flow communication with the reducing agent outlet supply path 340. More specifically, the servo-motor actuated valve 370 is adapted to regulate a pressure and quantity of reducing agent that flows from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340 and flows past the servo-motor actuated valve 370.

[0019] In an exemplary embodiment, the servo-motor actuated valve 370 is in flow communication with the reducing agent inlet supply path 320 and in flow communication with the reducing agent outlet supply path 340. The servo-motor actuated valve 370 is adapted to regulate a pressure and quantity of reducing agent that flows from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340. When power is supplied by the electronic control unit 323 to the servo-motor 385, the servo-motor 385 is adapted to be actuated to disconnect the reducing agent inlet supply path 320 and the reducing agent outlet supply path 340, thereby not permitting a flow of reducing agent from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340 by flowing past the servo-motor actuated valve 370. Similarly, when power is disengaged by the electronic control unit 323 to the servo-motor 385, the servo-motor 385 is adapted to be deactuated to connect the reducing agent inlet supply path 320 and the reducing agent outlet supply path 340, thereby connecting the flow of reducing agent from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340.

[0020] In an exemplary embodiment, a lead screw 311 is secured to the servo-motor 385 and is adapted to be extended in response to an actuation of the servo-motor 385. More specifically, when the electronic control unit 323 transmits an electronic signal to the servo-motor 385, the lead screw 311 that is secured to the servo-motor 385 rotates thereby causing the lead screw 311 to be extended. Conversely, the lead screw 311 that is secured to the servo-motor 385 is adapted to be retracted in response to a deactuation of the servo-motor 385. Therefore, the lead screw 311 that is secured to the servo-motor 385 is retracted when the electronic control unit 323 transmits an electronic signal to the servo-motor 385. A diaphragm 357 is secured to an end of the lead screw 311 and is adapted to close the reducing agent outlet supply path 340. More specifically, the diaphragm 357 is adapted to be actuated when the lead screw 311 is extended, and deactuated when the lead screw 311 is retracted. Therefore, the diaphragm 357 that is secured to an end of the lead screw 311 is actuated when power is supplied to the servo-motor 385, and conversely deactuated when power is disengaged from the servo-motor 385. Consequently, the diaphragm 357 closes the reducing agent outlet supply path 340 when the diaphragm 357/lead screw 311 is actuated/extended and the diaphragm 357 opens the reducing agent outlet supply path 340 when the diaphragm/lead screw is deactuated/retracted and vice versa.

[0021] In an exemplary embodiment, the electronic control unit 323 is in electronic communication with the servo-motor 385. The electronic control unit 323 is adapted to activate the servo-motor 385 to facilitate actuating the diaphragm 357. Conversely, the electronic control unit 323 is adapted to deactivate the servo-motor 385 to facilitate deactuating the diaphragm 357.

[0022] In an exemplary embodiment, a pressure sensor (not shown) is in flow communication with the reducing agent outlet supply path 340. When the pressure of the reducing agent in the reducing agent outlet supply path 340 is above a threshold limit that is pre-determined by a user, the pressure sensor transmits an electronic signal to the electronic control unit 323 via a control flow path. Therein, the electronic control unit 323 actuates the servo-motor 385 via the control flow path. The actuation of the servo-motor 385 causes an actuation of the lead screw 311. Therein, the lead screw 311 that is secured to the servo-motor 385 is extended towards the outlet supply path 340. The extension of the lead screw 311 causes the diaphragm 357 that is secured to the lead screw 311 to extend, thereby closing the reducing agent outlet supply path 340, and disconnecting the reducing agent outlet supply path 340 with the reducing agent inlet supply path 320. The closing of the reducing agent outlet supply path 340 causes reducing agent to not flow from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340, resulting in a decrease in pressure of the reducing agent flowing through the reducing agent outlet supply path 340. When the pressure of the reducing agent flowing through the reducing agent outlet supply path 340 is below the threshold limit that is pre-determined by a user, the pressure sensor transmits an electronic signal to the electronic control unit 323. Therein, the electronic control unit 323 deactivates the servo-motor via the control flow path. The deactuation of the servo-motor 385 causes a deactuation of the lead screw 311. The deactuation of the lead screw 311 causes the diaphragm 357 to retract back to its original position from its extended position. The retraction of the lead screw 311 causes the diaphragm 357 that is secured to the lead screw 311 to retract, thereby opening the reducing agent outlet supply path 340. The opening of the reducing agent outlet supply path 340 causes reducing agent to flow from the reducing agent inlet supply path 320 to the reducing agent outlet supply path 340 due to the engagement between the reducing agent inlet supply path 320 and the reducing agent outlet supply path 340. The engagement between the reducing agent inlet supply path 320 and the reducing agent outlet supply path 340 results in an increase in pressure of the reducing agent flowing through the reducing agent outlet supply path 340 and increases the flow of reducing agent through the reducing agent outlet supply path 340.

[0023] 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 pressure regulator (100) for a supply module (110) of a reducing agent, said pressure regulator (100) comprising:
a reducing agent inlet supply path (120) in flow communication with a pump module (130) and adapted to receive a reducing agent from said pump module (130);
a reducing agent outlet supply path (140), an upstream end (150) of the reducing agent outlet supply path (140) in flow communication with the reducing agent inlet supply path (120) and adapted to receive the reducing agent from the reducing agent inlet supply path (120), a downstream end (160) of the reducing agent outlet supply path (140) in flow communication with a dosing module and adapted to deliver the reducing agent to said dosing module; and
a solenoid valve (170) in flow communication with the reducing agent inlet supply path (120) and in flow communication with the reducing agent outlet supply path (140), said solenoid valve (170) adapted to regulate a flow of reducing agent from the reducing agent inlet supply path (120) to the reducing agent outlet supply path (140).

2. The pressure regulator (100) for a supply module (110) of a reducing agent in accordance with Claim 1, wherein said solenoid valve (170) comprises:
a spring chamber (180) that houses a spring member (190), wherein a first end (183) of said spring member (190) is positioned against an end of said spring chamber (180);
a solenoid coil (185) positioned against an opposite second end (184) of said spring member (190);
at least one magnet (191) positioned proximate to said solenoid coil (185), said at least one magnet (191) adapted to be energized/deenergized to actuate/deactuate said solenoid coil (185), thereby controlling a flow of reducing agent from the reducing agent inlet supply path (120) to the reducing agent outlet supply path (140);
a plunger (111) secured to said solenoid coil (185) and adapted to be actuated/deactuated when said at least one magnet (191) is energized/deenergized;
a diaphragm (157) secured to an end of said plunger (111), said diaphragm (157) adapted to be actuated/deactuated when said at least one magnet (191) is energized/deenergized, such that said diaphragm (157) closes the reducing agent outlet supply path (140) when said diaphragm (157) is actuated and said diaphragm (157) opens the reducing agent outlet supply path (140) when said diaphragm (157) is deactuated.

3. The pressure regulator (100) for a supply module (110) of a reducing agent in accordance with Claim 2, further comprising an electronic control unit (123) in electronic communication with said at least one magnet (191), said electronic control unit (123) adapted to activate said at least one magnet (191) to facilitate energizing said solenoid coil (185), said electronic control unit (123) adapted to deactivate said at least one magnet (191) to facilitate deenergizing said solenoid coil (185).

4. The pressure regulator (100) for a supply module (110) of a reducing agent in accordance with Claim 1, wherein said solenoid valve (170) comprises:
a chamber (215) that comprises a rotary solenoid (285) positioned within said chamber (215) and adapted to be rotated to energize said rotary solenoid coil (285);
at least one magnet (291) positioned proximate to said rotary solenoid (285), said at least one magnet (291) adapted to be energized/deenergized to actuate/deactuate said rotary solenoid (285), thereby controlling a flow of reducing agent from the reducing agent inlet supply path (220) to the reducing agent outlet supply path (240);
a lead screw (211) secured to said rotary solenoid (285) and adapted to be extended/retracted when said at least one magnet (291) is energized/deenergized; and
a diaphragm (257) secured to an end of said lead screw (211), said diaphragm (257) adapted to be extended/retracted when said at least one magnet (291) is energized/deenergized, such that said diaphragm (257) closes the reducing agent outlet supply path (240) when said diaphragm (257) is actuated and said diaphragm (257) opens the reducing agent outlet supply path (240) when said diaphragm (257) is deactuated.

5. The pressure regulator (100) for a supply module (110) of a reducing agent in accordance with Claim 4, further comprising an electronic control unit (223) in electronic communication with said at least one magnet (291), said electronic control unit (223) adapted to activate said at least one magnet (291) to facilitate energizing said rotary solenoid coil (285), said electronic control unit (223) adapted to deactivate said at least one magnet (291) to facilitate deenergizing said rotary solenoid coil (285).

6. The pressure regulator (100) for a supply module (110) of a reducing agent in accordance with Claim 5, further comprising a pressure sensor in flow communication with a downstream end (260) of said reducing agent outlet supply path (240) and in flow communication with said electronic control unit (223), said electronic control unit (223) adapted to activate said at least one magnet (291) in response to a pressure signal received from said pressure sensor, said electronic control unit (223) adapted to deactivate said at least one magnet (291) in response to a deactivation of the pressure signal received from said pressure sensor.

7. A pressure regulator (300) for a supply module (310) of a reducing agent, said pressure regulator (300) comprising:
a reducing agent inlet supply path (320) in flow communication with a pump module (330) and adapted to receive a reducing agent from said pump module (330);
a reducing agent outlet supply path (340), an upstream end (350) of the reducing agent outlet supply path (340) in flow communication with the reducing agent inlet supply path (320) and adapted to receive the reducing agent from the reducing agent inlet supply path (320), a downstream end (360) of the reducing agent outlet supply path (340) in flow communication with a dosing module and adapted to deliver the reducing agent to said dosing module; and
a servo-motor actuated valve (370) in flow communication with the reducing agent inlet supply path (320) and in flow communication with the reducing agent outlet supply path (340), said servo-motor actuated valve (370) adapted to regulate a flow of reducing agent from the reducing agent inlet supply path (320) to the reducing agent outlet supply path (340).

8. The pressure regulator (300) for a supply module (310) of a reducing agent in accordance with Claim 7, wherein said servo-motor actuated valve (370) comprises:
a chamber (380) that comprises a servo-motor (385) positioned within the chamber (380) and adapted to be activated to actuate said servo-motor (385);
an electronic control unit (323) in electronic communication with said servo-motor (385), said electronic control unit (323) adapted to activate/deactivate said servo-motor (385), thereby controlling a flow of reducing agent from the reducing agent inlet supply path (320) to the reducing agent outlet supply path (340); and
a lead screw (311) secured to said servo-motor (385) and adapted to be extended/retracted when said servo-motor (385) is activated/deactivated; and
a diaphragm (357) secured to an end of said lead screw (311), said diaphragm (357) adapted to be extended/retracted when said servo-motor (385) is actuated/deactuated, such that said diaphragm (357) closes the reducing agent outlet supply path (340) when said diaphragm (357) is actuated and said diaphragm (357) opens the reducing agent outlet supply path (340) when said diaphragm (357) is deactuated.

9. The pressure regulator (300) for a supply module (310) of a reducing agent in accordance with Claim 8, further comprising the electronic control unit (323) in electronic communication with said servo-motor (385), said electronic control unit (323) adapted to activate said servo-motor (385) to facilitate actuating said servo-motor (385), said electronic control unit (323) adapted to deactivate said servo-motor (385) to facilitate deactuating said servo-motor (385).
10. The pressure regulator (300) for a supply module (310) of a reducing agent in accordance with Claim 9, further comprising a pressure sensor in flow communication with a downstream end (360) of said reducing agent outlet supply path (340) and in flow communication with said electronic control unit (323), said electronic control unit (323) adapted to activate said at least one magnet (391) in response to a pressure signal received from said pressure sensor, said electronic control unit (323) adapted to deactivate said at least one magnet (391) in response to a deactivation of the pressure signal received from said pressure sensor.