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Metering pump nozzle and engine exhaust post-treatment system with same

An exhaust post-processing and engine technology, applied in engine components, machines/engines, exhaust devices, etc., can solve the problems of high pressure leakage and high complexity of control algorithms, avoiding leakage, improving atomization effect, and high reliability. Effect

Active Publication Date: 2016-10-05
TENNECO SUZHOU EMISSION SYST
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] This design has the following problems: first, because the system contains high-pressure pipelines, there will be a risk of high-pressure leakage; second, the pump supply unit needs to have the functions of heating, thawing and backflushing to prevent the urea injection system from collapsing under high-cold conditions. Icing and leakage; third, high-pressure atomization is required at the nozzle, the nozzle needs urea reflux cooling and the control algorithm is highly complex

Method used

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  • Metering pump nozzle and engine exhaust post-treatment system with same
  • Metering pump nozzle and engine exhaust post-treatment system with same

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Embodiment Construction

[0018] Please refer to figure 1 As shown, the present invention discloses an engine exhaust aftertreatment system 100, which includes a urea tank 1, a metering pump nozzle 2 connected to the urea tank 1, and a controller for controlling the engine exhaust aftertreatment system 3. The metering pump nozzle 2 is used to be installed on the exhaust pipe 200 of the engine to spray the urea solution into the exhaust pipe 200 .

[0019] The urea tank 1 includes a liquid level sensor 11 , a temperature sensor 12 and a heating unit 13 . The liquid level sensor 11 , the temperature sensor 12 and the heating unit 13 are all connected to the controller 3 .

[0020] The engine exhaust aftertreatment system 100 only includes the low-pressure pipeline 4 connecting the urea tank 1 and the metering pump nozzle 2, and the engine exhaust aftertreatment system 100 is not provided with the urea pipe 4 connected to the metering pump nozzle 2. High-pressure piping connected to the outlet. Such s...

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Abstract

A metering pump nozzle and an engine exhaust post-treatment system with the same are provided. The metering pump nozzle comprises a pump and a nozzle positioned below the pump, the pump and the nozzle are adjacent and integrated together, the pump is used for pumping urea solution, the nozzle is mounted to an exhaust pipe of an engine to spray the urea solution into the exhaust pipe, the metering pump nozzle also comprises a cooling device positioned around the nozzle and / or the pump and an air atomizer for mixing with the urea solution. A high-pressure pipe connecting the pump and the nozzle is omitted, avoiding the risk that the high-pressure pipe leaks; the cooling device is arranged to reduce temperature, lessening the risk that the nozzle and / or the pump are burned out by high-temperature exhaust; in addition, the air atomizer is arranged to provide improved atomization of the urea solution.

Description

technical field [0001] The invention relates to a metering pump nozzle and an engine exhaust aftertreatment system, belonging to the technical field of engine exhaust aftertreatment. Background technique [0002] The urea injection systems currently on the market (air-assisted and non-air-assisted systems) all use a urea tank assembly, a pump supply unit connected to the urea tank assembly through a low-pressure pipeline, and a nozzle connected to the pump supply unit through a high-pressure pipeline modules and controllers. [0003] This design has the following problems: first, because the system contains high-pressure pipelines, there will be a risk of high-pressure leakage; second, the pump supply unit needs to have the functions of heating, thawing and backflushing to prevent the urea injection system from collapsing under high-cold conditions. Icing and leakage; Third, high-pressure atomization is required at the nozzle, the nozzle needs urea reflux to cool, and the c...

Claims

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Application Information

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IPC IPC(8): F01N3/24B05B9/04
Inventor 樊高峰杜标樊坚强
Owner TENNECO SUZHOU EMISSION SYST
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