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Integral solenoid valve for air-aided SCR system and control method

A technology of SCR system and solenoid valve, which is applied to the electric control of exhaust treatment devices, exhaust treatment, exhaust devices, etc., can solve the problems of large system volume, high price, and complexity, and achieve reasonable pipeline layout and fog Good chemical effect and stable air pressure

Inactive Publication Date: 2015-07-29
SINO TRUK JINAN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional air-assisted SCR systems use separate solenoid valves and pressure reducing valves, and the connection between valves is usually connected by external pipelines. This method makes the system have many joints, and the system is large and complex. Expensive and has many leak points

Method used

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  • Integral solenoid valve for air-aided SCR system and control method
  • Integral solenoid valve for air-aided SCR system and control method
  • Integral solenoid valve for air-aided SCR system and control method

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Embodiment Construction

[0024] see figure 1 , figure 1 The working principle of the integrated solenoid valve is shown. The integrated solenoid valve is composed of an air switch solenoid valve 1, an emptying solenoid valve 2, a fixed value pressure reducing and stabilizing valve 3, and an air filter core 4. There are four interfaces with the external Connections are: compressed air inlet P, compressed air outlet A1, exhaust air outlet A2 and air pressure sensor interface A3.

[0025] figure 2 The three-dimensional effect of the integrated solenoid valve is shown. The air switch solenoid valve pilot assembly V1 and the emptying solenoid valve pilot assembly V2 are installed on the top of the valve body 5, and the lead wire of the air switch solenoid valve pilot assembly V1 is connected to the emptying The lead wires of the solenoid valve pilot assembly V2 are merged into one strand and connected to the upper lead terminal 13 .

[0026] image 3 A cross-sectional view of the air filter core is ...

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Abstract

The invention provides an integral solenoid valve for an air-aided SCR system and a control method. The integral solenoid valve comprises a vehicle-mounted compressed air storing barrel which is connected with a valve body. The integral solenoid valve is characterized in that an air filter element is arranged in the valve body and connected with an air switch solenoid valve; the air switch solenoid valve is connected with a fixed pressure reducing and stabilizing valve; the fixed pressure reducing and stabilizing valve is connected with an emptying solenoid valve; the emptying solenoid valve is connected with an urea injection device through an urea pump loop. According to the scheme, the integral solenoid valve is that the air switch solenoid valve, the emptying solenoid valve and the fixed pressure reducing and stabilizing valve are integrally reasonably arranged and connected in the valve body through pipelines; the pipelines are short, free of pipe joints and free of leakage.

Description

technical field [0001] The invention relates to the field of solenoid valves, in particular to an integrated solenoid valve for an air-assisted SCR system and a control method. Background technique [0002] At present, the air pollution is becoming more and more serious. Among them, the automobile powered by diesel engine is an important pollution source. The main pollution source of diesel engine is nitrogen oxides NOx. In order to reduce the emission of NOx, the main technical route used by the automobile industry is the selective catalytic reduction method ( Selective Catalytic Reduction (SCR) reduces the NOx in the exhaust gas to harmless nitrogen, carbon dioxide and water by spraying urea solution into the exhaust gas. With the development of the automobile industry, the demand for SCR is also increasing. [0003] In order to improve the conversion efficiency of the SCR system, gas-assisted injection is generally used. Traditional air-assisted SCR systems use separate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N9/00
CPCY02A50/20Y02T10/40
Inventor 高发廷
Owner SINO TRUK JINAN POWER
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