Pulse pump

A technology of pulse pump and pump body, applied in the direction of pumps, pump components, fuel injection pumps, etc., can solve the problems of nitrogen oxides not being reduced, waste, secondary pollution, etc.

Active Publication Date: 2017-02-22
ZHEJIANG FAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the SCR system is sprayed, too little injection of NOX reducing agent (that is, urea aqueous solution) will cause some nitrogen oxides to not be reduced, and excessive injection of reducing agent will lead to waste on the one hand and secondary pollution on the other hand

Method used

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Examples

Experimental program
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Embodiment Construction

[0037] Such as figure 1As shown, it is one of the schematic diagrams of the embodiment of the pulse pump provided by the present invention. The pulse pump 1 includes the pump body 1a and the plunger pump 1b therein, the rear pump end 8 with the liquid inlet channel 8a and the return spring 7 . The plunger pump 1 b includes a sleeve 2 , a plunger 3 , an input valve 4 and an output valve 5 . The sleeve 2 and the plunger 3 form a pressure-feeding space 6, and the input valve 4 and the output valve 5 are respectively connected to the pressure-feeding space 6. The sleeve 2 includes a sleeve inner hole 2a, and the sleeve inner hole 2a closely fits with the outer surface of the plunger 3 and can slide freely. The plunger 3 is fixed on the pump body 1a, and the sleeve 2 can reciprocate along the plunger 3, causing the volume of the pressure-feeding space 6 to change alternately. The sleeve 2 is arranged with an axially through straight groove 2c to reduce the reciprocating motion r...

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Abstract

A pulse pump includes a pump body and a plunger pump; the plunger pump includes a sleeve, a plunger, an input valve, and an output valve; the sleeve and the plunger form a compression and delivery space; the input valve and the output valve are connected to the compression and delivery space; relative motion of the sleeve and the plunger results in input and output of liquid in the compression and delivery space; the input valve includes an input valve body, an input valve seat, and a front limiting member; the input valve body is positioned between the input valve seat and the front limiting member; the front limiting member and the valve seat keep a certain minimum distance such that the input valve body has a motion stroke existing between the input valve seat and the front limiting member.

Description

technical field [0001] The invention belongs to the technical field of liquid metering, especially the liquid injection metering technology related to engines, and specifically relates to engine fuel injection devices, engine tail gas purification NOx selective catalytic reduction (SCR) systems, and diesel engine exhaust particulate matter filter collectors (DPF ) fuel injection regeneration system and its control method. Background technique [0002] In the engine field, specific technologies related to liquid injection metering include but are not limited to: Engine electronic fuel injection system: including gasoline direct injection (GDI) and port injection (PFI), diesel high-pressure common rail system, engine exhaust purification Nitric oxide selective catalytic reduction (SCR) urea water injection system, diesel exhaust particulate filter (DPF) regeneration injection system. These internal combustion engine-powered vehicles require better combustion control and the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B13/00F04B53/10F02M59/02
Inventor 郗大光徐露明乐起奖
Owner ZHEJIANG FAI ELECTRONICS
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