公开(公告)号：US07647811B2

公开(公告)日：2010-01-19

申请号：US11614464

申请日：2006-12-21

申请人： Qiang Wei ,  Scott T. Porter ,  Ichiro Asano ,  Montajir M D. Rahman ,  Takeshi Kusaka

发明人： Qiang Wei ,  Scott T. Porter ,  Ichiro Asano ,  Montajir M D. Rahman ,  Takeshi Kusaka

IPC分类号： G01N7/00

CPC分类号： G01N15/065 ,  F01N11/00 ,  F02D41/1466 ,  G01N1/2211 ,  G01N1/2252 ,  G01N2001/2264

摘要： A solid particle counting system for measuring solid particle number concentrations from engine or vehicle exhausts in real-time includes a diluter arrangement, a particle counter, and a flow splitter. The diluter arrangement mixes the dilution gas with flowing sample gases. The flow splitter receives the output flow from the diluter arrangement, provides a portion of this flow to the particle counter, and provides a by-pass flow that is received by a vacuum pump. A second flow route to the particle counter includes a valve arranged such that opening the valve during the starting of the vacuum pump reduces a pressure pulse at the particle counter caused by the starting of the vacuum pump, thereby avoiding work fluid backflow from the particle counter prior to the vacuum pump stabilizing.

摘要翻译： 用于实时测量发动机或车辆排气的固体颗粒数浓度的固体颗粒计数系统包括稀释装置，颗粒计数器和分流器。 稀释装置将稀释气体与流动的样品气体混合。 分流器接收来自稀释器装置的输出流，将该流的一部分提供给颗粒计数器，并提供由真空泵接收的旁路流。 到颗粒计数器的第二流动路径包括一个排列成使得在真空泵起动期间打开阀的阀降低了由真空泵启动引起的颗粒计数器处的压力脉冲，从而避免工作流体从颗粒计数器回流 在真空泵稳定之前。

公开(公告)号：US07665375B2

公开(公告)日：2010-02-23

申请号：US11614450

申请日：2006-12-21

申请人： Qiang Wei ,  Scott T. Porter ,  Ichiro Asano ,  Montajir M D. Rahman ,  Takeshi Kusaka

发明人： Qiang Wei ,  Scott T. Porter ,  Ichiro Asano ,  Montajir M D. Rahman ,  Takeshi Kusaka

IPC分类号： G01N15/00

CPC分类号： G01N15/065 ,  G01N1/2211 ,  G01N1/2252 ,  G01N2001/2264

摘要： A solid particle counting system for measuring solid particle number concentrations from engine or vehicle exhausts in real-time includes a flow splitter having an inlet, a sample outlet, and a by-pass outlet arranged such that a main flow enters the inlet and changes direction to exit the by-pass outlet. A sample flow from the main flow exits the sample outlet. The flow splitter further includes a guiding element arranged such that particles at a sampling location upstream of the main flow direction change are guided to the sample outlet.

摘要翻译： 用于实时测量发动机或车辆排气的固体颗粒数浓度的固体颗粒计数系统包括分流器，其具有入口，样品出口和旁路出口，其布置成使得主流进入入口并改变方向 退出旁路出口。 来自主流的样品流离开样品出口。 分流器还包括引导元件，其被布置成使得在主流动方向改变的上游的采样位置的颗粒被引导到样品出口。

公开(公告)号：US07806968B2

公开(公告)日：2010-10-05

申请号：US11872961

申请日：2007-10-16

申请人： Qiang Wei ,  Montajir M D. Rahman ,  Michael Akard

发明人： Qiang Wei ,  Montajir M D. Rahman ,  Michael Akard

IPC分类号： B03C3/68

CPC分类号： G05D7/0641 ,  B01D2257/708 ,  G01N1/2252 ,  G01N15/065 ,  G01N2001/2223 ,  G01N2001/2255

摘要： A penetration and removal efficiency calibration unit for a volatile particle remover in a solid particle counting system provides an accurate and efficient approach to calibration. The calibration unit includes an aerosol inlet, a flow meter downstream of the aerosol inlet, and a mixer. The flow meter receives the aerosol flow from the aerosol inlet and provides an output flow to the mixer. The mixer receives the output flow from the flow meter and also has a dilution gas inlet. The mixer provides a mixer output flow for reception by the volatile particle remover or particle counter. A first flow controller controls flow into the dilution gas inlet. The calibration unit also includes a bypass inlet. A second flow controller controls flow into the bypass inlet, and a control loop controls the bypass flow such that the aerosol flow tracks a reference value.

摘要翻译： 用于固体颗粒计数系统中的挥发性颗粒去除剂的渗透和去除效率校准单元提供了精确和有效的校准方法。 校准单元包括气溶胶入口，气溶胶入口下游的流量计和混合器。 流量计接收来自气溶胶入口的气溶胶流，并向混合器提供输出流。 混合器接收来自流量计的输出流，并且还具有稀释气体入口。 混合器提供混合器输出流，用于由挥发性颗粒去除剂或颗粒计数器接收。 第一流量控制器控制进入稀释气体入口的流量。 校准单元还包括旁路入口。 第二流量控制器控制进入旁路入口的流量，并且控制回路控制旁路流，使得气溶胶流跟踪参考值。