사이트 내 전체검색

PRDOUCT

Speclalzed OIL-LESS Plston Pumps

Fuel Dosing Unit for DPF
PRODUCT   >   Fuel Dosing Unit for DPF

◆ DPF ( Diesel Particulate Filter )


  Diesel engines produce a variety of particles during combustion. Wall-flow diesel particulate filters, also known as DPF (Diesel Particulate Filter), usually remove 85% or up to 100% of these particles(soot). And filters are designed to burn off the accumulated particulate either passively through the use of a catalyst or by active means such as a fuel burner which heats the filter to soot combustion temperatures. This burn off process is known as filter regeneration.

  Regeneration is the process of removing the accumulated soot from the filter. This is done either passively or actively introducing very high heat into the exhaust system. On-board active filter management can use a variety of strategies:

  •  Engine management to increase exhaust temperature through late fuel injection or injection during the exhaust stroke 
  •  Use of a fuel borne catalyst to reduce soot burn-out temperature
  •  A catalytic oxidizer to increase the exhaust temperature, with after injection (HC-Doser)
  •  Resistive heating coils to increase the exhaust temperature
  •  Microwave energy to increase the particulate temperature
  •  A fuel burner after the turbo charger to increase the exhaust temperature

 

  Fuel burner strategy is mainly used. especially in retrofit market. And Most of on-board active systems also use extra fuel, whether through burning to heat the DPF. The additional fuel can be supplied by a dosing unit which has a metering pump and/or air compressor.


On-board fuel burner regeneration system (typical) 

  


 The controller monitors one or more sensors that measure back pressure and/or temperature, and based on pre-programmed set points the controller makes decisions on when to activate the regeneration cycle.

  During regeneration cycle, the dosing unit inject the fuel into burner to heat DOC and DPF upon controller’s signal. The amount of injected fuel must match the amount of heat demand corresponding to temperature of DOC and/or DPF at given driving conditions.


◆ Fuel Dosing Unit

The main functions of the fuel dosing module include:

  -  Dosing of the precise amount of fuel necessary to heat DPF, and

  -  Supplying the air to spray and burn air/fuel mixture in the burner

 Dosing unit consists of a solenoid fuel pump, oil-less air compressor and air pressure sensor. It can supply a mixture of fuel/air to burner and delivers the air pressure to the controller. 


◆ Specification 


 Model

 12V

24V 

 Operating voltage

 10 ~ 15 V

 19 ~ 29 V

 Air flow rate @ 1ba

over  6.5 L/min

over 7 L/min

 Fuel injection rate

 20~250 g/min

 Air Pressure sensor

 0~0.785MPa (0.5~4.5Vdc

 Electric Connector

 KET MG654349

 Weight

 4 kg

 Dimension

 273 x 197 x 94

 Fuel inlet/Return

 Standard Ø7.89 (SAE J2044)

 Fuel Outlet

 Rc1/8 thread



 


 1

Case

Material: ADC12 

 2

 Cover

Material: SCP1 

 3

 Oil-less Air Compressor

BLDC MOtor 

 4

 Fuel Pump

Solenoid Piston Pump 

 5

 Air Pressure Sensor

 

 6

 Electric Connector

 

 7

 Fuel In/Return Quick Connection Adapter

 

 8

 Fuel Outlet Fitting

 



◆ Dimension

 



  • 게시물이 없습니다.
Copyright(c) 2017 G&M Tech Inc. All rights reserved.
(주)지엔엠텍