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

A technology of SCR system and supply device, which is applied in the direction of muffler, exhaust device, exhaust treatment, etc., can solve expensive problems, achieve low cost, easy system control, and realize the effect of system control

Active Publication Date: 2013-12-25
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] Such as 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 bet...

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Abstract

A vehicle SCR system and its reducing agent supplying device are disclosed. The reducing agent supplying device comprises a pump (40), an injecting assembly (70) connected with the pump (40) via a pressure line (60), and a power accumulator (50) disposed in the pressure line (60). The power accumulator (50) comprises a partition member defining upstream and downstream chambers (53, 54), an elastic member (55) biasing the partition member towards the upstream chamber (53), and a valve (63) disposed in the partition member. When the pump (40) is turned on, a reducing agent is fed into the upstream chamber (53) and forces the partition member to move towards the downstream chamber (54), so that the valve (63) is opened and the reducing agent flows into the downstream chamber (54). When the pump (40) is turned off, the partition member is driven by the elastic member (55) to move towards the upstream chamber (53), so that the reducing agent in the pressure line (60) and the injecting assembly (70) is drawn into the downstream chamber (54).

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