×

Exhaust gas particulate measuring system

  • US 7,243,559 B2
  • Filed: 10/24/2003
  • Issued: 07/17/2007
  • Est. Priority Date: 07/10/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A gas sampling system for measuring particulate matter in an exhaust gas stream of an internal combustion engine comprising:

  • a partial flow dilution tunnel connected to the exhaust gas stream of the engine;

    a first mass flow controller operatively connected an inlet of said partial flow dilution tunnel;

    a second mass flow controller connected to an outlet end of said partial flow dilution tunnel;

    a filter interposed said second mass flow controller and the outlet end of said partial flow dilution tunnel; and

    a transient dilution air control arrangement being interposed the first mass flow controller and the inlet of said partial flow dilution tunnel, said transient dilution air control arrangement includes a constant mass flow stream and a variable mass flow stream non-collinearly connected with said constant mass flow stream prior to the inlet of the partial flow dilution tunnel for controlling a dilution air supply to said partial flow dilution tunnel.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×