Advanced exhaust-gas sampler for exhaust sensor

摘要

An exhaust-gas sampler is adapted to couple into an exhaust conduit and to sample a constituent of an engine exhaust flowing therein. The sampler comprises an envelope having upstream and downstream surfaces joined by a curved side surface. The upstream and downstream surfaces are each tangent to a plane substantially normal to a central axis of the exhaust conduit. A series of inlets are formed in the upstream surface, and an outlet is formed in the curved side surface. A sensor responsive to a level of the constituent in the exhaust is coupled in the envelope, at the peripheral region of the conduit.

主权项

1. An exhaust-gas sampler couplable into an exhaust conduit and to sample exhaust flowing therein, comprising:
an envelope having upstream and downstream surfaces, each tangent to a plane normal to an exhaust conduit central axis, joined by a curved side surface with an outlet formed therein, and a series of inlets formed in the upstream surface including a first inlet and a second, larger, inlet arranged a greater distance from the outlet than the first inlet.