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Vehicle SCR (Selective Catalytic Reduction) system and reducing agent supply device thereof

A technology of SCR system and supply device, applied in muffler device, exhaust device, exhaust gas treatment and other directions, can solve the problem of high cost, and achieve the effect of low cost, easy assembly and easy transformation

Active Publication Date: 2012-04-04
BOSCH AUTOMOTIVE DIESEL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, for option 1 above, many control elements are required; for option 2 above, auxiliary compressed air from the vehicle and corresponding supply sources are required
Therefore, both of the above options are more expensive

Method used

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  • Vehicle SCR (Selective Catalytic Reduction) system and reducing agent supply device thereof
  • Vehicle SCR (Selective Catalytic Reduction) system and reducing agent supply device thereof
  • Vehicle SCR (Selective Catalytic Reduction) system and reducing agent supply device thereof

Examples

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Embodiment Construction

[0061] Preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0062] figure 2 Shown is a reducing agent supply device according to an embodiment of the present invention, which is used for injecting reducing agent at a certain pressure and a metered flow rate to an SCR module in an engine exhaust SCR system. The reducing agent can be commonly used urea solution, such as AdBlue.

[0063] The reducing agent supply device of the present invention may be configured in the form of a reducing agent supply module.

[0064] like figure 2 As shown, the reducing agent supply device mainly includes: a tank 10 storing the reducing agent; a pump 40 connected to the tank 10 through a suction line 20, which is a flow control pump in this example; The filter 30 between the tank 10 and the pump 40 is used to filter the reducing agent from the tank 10, and the suction line 20 is thus divided into an upstream suction line 20a betwee...

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Abstract

The invention discloses a vehicle SCR (Selective Catalytic Reduction) system and a reducing agent supply device thereof. The reducing agent supply device comprises a reducing agent tank, a pump, a nozzle device and an energy storage device, wherein the pump is connected with the tank; the nozzle device is connected with the pump through a pressure pipeline; the energy storage device is connected between the pump and the nozzle device in the pressure pipeline; the energy storage device comprises a partition plate, an elastic member and a valve; through the partition plate, an internal accommodating cavity of a shell is isolated into an upstream side accommodating cavity and a downstream side accommodating cavity; the partition plate can integrally or locally move; the elastic member is used for pushing the partition plate towards the upstream side accommodating cavity; the valve is arranged in the partition plate and allows that a reducing agent in the upstream side accommodating cavity flows into the downstream side accommodating cavity; after the pump is started, the reducing agent is supplied into the upstream side accommodating cavity, the partition plate is forced to move towards the interior of the downstream side accommodating cavity against the pushing force of the elastic member, and the valve is opened to supply the reducing agent to the nozzle device; and after the pump is closed, the partition plate is pushed towards the upstream side accommodating cavity by the elastic member, so that the reducing agent in the pressure pipeline and the nozzle device is sucked into the downstream side accommodating cavity.

Description

technical field [0001] The invention relates to an SCR system for a vehicle, especially a diesel engine vehicle, and a reducing agent supply device thereof. The reducing agent supply device has the function of returning the reducing agent after operation. Background technique [0002] Vehicle engine exhaust contains PM, NOx, HC, CO and other harmful components. In recent years, with the enhancement of environmental awareness, more and more stringent emission standards have been implemented. [0003] In order to reduce the harmful components in the exhaust, on the one hand, the engine can be continuously upgraded and improved to reduce the harmful gas emission of the engine itself. On the other hand, which is also a more efficient aspect, is to choose the appropriate aftertreatment technology to reduce the amount of harmful gases emitted by the engine. [0004] In an existing engine exhaust aftertreatment system, such as figure 1 As shown, it includes OXI module 2 , DPF mo...

Claims

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Application Information

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IPC IPC(8): F01N3/20B01D53/94B01D53/56
CPCF01N3/2066Y02T10/24F01N2610/1473F01N2610/14F01N2610/02Y02A50/20Y02T10/12
Inventor 沈志彬
Owner BOSCH AUTOMOTIVE DIESEL SYST
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