Integral purge ejector tee arrangement in a turbocompressor

Patent metadata

Field	Value
Publication number	US-9664154-B2
Application number	US-201514742008-A
Country	US
Kind code	B2
Filing date	Jun 17, 2015
Priority date	Jun 19, 2014
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A boost purge ejector tee arrangement is integrated into a turbocompressor associated with an engine and includes first and second passages, an inlet port and a nozzle. The first passage is formed into a housing of the turbocompressor and includes an outlet in communication with a turbocompressor inlet. The second passage is formed into the housing and includes a boost air inlet in communication with an internal outlet area of the turbocompressor and intersecting the first passage. The inlet port is associated with the housing and intersects the first passage. The nozzle is positioned in the first passage such that an outlet of the nozzle is proximate the intersection of the inlet port and first passage. During a boost mode of operation, the second passage is adapted to receive boost air flow, which flows through the nozzle thereby creating a vacuum and drawing purge through the inlet port.

First claim

What is claimed is:

1. A boost purge ejector tee arrangement for a fuel vapor emissions system coupled to an intake manifold of an engine with a forced induction system, comprising:
a boost purge ejector tee integrated into a turbocompressor associated with the engine, the boost purge ejector tee including:
a first passage formed into a housing of the turbocompressor and including an outlet in communication with an inlet of the turbocompressor;
a second passage formed into the housing, the second passage including a boost air inlet in communication with an internal outlet area of the turbocompressor and intersecting the first passage, the first and second passages of the housing defining a first flow path from the internal outlet area to the turbocompressor inlet;
an inlet port associated with the housing and intersecting the first passage, the housing defining a second flow path from the inlet port to the outlet, the second flow path intersecting the first flow path upstream of the outlet; and
a nozzle positioned in the first flow path such that an outlet of the nozzle is proximate the intersection of the first flow path with the second flow path;

wherein during a boost operation mode, the second passage is adapted to receive boost air flow, which flows through the nozzle along the first flow path thereby creating a vacuum and drawing purge through the inlet port.

2. The boost purge ejector tee arrangement of claim 1 , wherein the first passage and outlet associated therewith, the second passage and inlet associated therewith and at least a portion of the inlet port are inside the turbocompressor such that boost air enters the second passage inside the turbocompressor and a combination of purge and boost air exits the integrated boost purge ejector tee inside of the turbocompressor through the outlet of the first passage.

3. The boost purge ejector tee arrangement of claim 1 , wherein the inlet port is adapted to be in communication with a purge valve of the fuel vapor emissions system, which is in fluid communication with a purge canister of the fuel vapor emissions system.

4. The boost purge ejector tee arrangement of claim 3 , wherein the nozzle comprises a venturi nozzle; and
wherein in the boost operation mode, the boost air flows through the first passage and the venturi nozzle along the first flow path, thereby creating a vacuum to draw the purge from the purge canister through the inlet port into the first flow path and into the turbocompressor inlet via the first passage outlet.

5. The boost purge ejector tee arrangement of claim 4 , wherein the inlet port is in direct fluid communication with the purge valve.

6. The boost purge ejector tee arrangement of claim 1 , further comprising a third passage integrally formed into the housing and intersecting the first passage, the third passage receiving the inlet port.

7. The boost purge ejector tee arrangement of claim 1 , wherein the boost air inlet of the second passage is in direct fluid communication with a volute area of the turbocompressor.

8. The boost purge ejector tee arrangement of claim 1 , further comprising an insert member positioned in the first passage at an end of the first passage opposite the outlet, the insert member including the nozzle and configured to seal off the first passage from an exterior of the turbocompressor.

9. The boost purge ejector tee arrangement of claim 8 , wherein the insert member further comprises a flow inlet in communication with the nozzle, the flow inlet being in alignment with the second passage and the outlet of the nozzle, which is positioned proximate to and upstream of the intersection of the inlet port and the first passage.

10. The boost purge ejector tee arrangement of claim 9 , wherein the flow inlet comprises a radial flow passage, and wherein the insert member is positioned at least partially in the second passage such that the radial flow passage is positioned in and in alignment with the second passage and the nozzle is in alignment with and positioned at least partially in the first passage.

11. The boost purge ejector tee arrangement of claim 9 , wherein the nozzle comprises a venturi nozzle.

12. The boost purge ejector tee arrangement of claim 9 , wherein the second passage intersects the first passage upstream of the intersection of the inlet port with the first passage, which is upstream of the outlet of the first passage.

13. A turbocompressor associated with a fuel vapor emissions system that is coupled to an intake manifold of an engine, the turbocompressor comprising:
a boost purge ejector tee arrangement integrated into the turbocompressor, the boost purge ejector tee arrangement including:
a first passage formed into a housing of the turbocompressor and including an outlet in communication with an inlet of the turbocompressor;
a second passage formed into the housing, the second passage including a boost air inlet in communication with an internal outlet area of the turbocompressor and intersecting the first passage, the first and second passages of the housing defining a first flow path from the internal outlet area to the turbocompressor inlet;
an inlet port associated with the housing and intersecting the first passage, the housing defining a second flow path from the inlet port to the outlet, the second flow path intersecting the first flow path upstream of the outlet; and
a nozzle positioned in the first flow path such that an outlet of the nozzle is proximate the intersection of the first flow path with the second flow path;

wherein during a boost operation mode, the second passage is adapted to receive boost air flow, which flows through the nozzle along the first flow path thereby creating a vacuum and drawing purge through the inlet port.

14. The turbocompressor of claim 13 , wherein the first passage and outlet associated therewith, the second passage and inlet associated therewith and at least a portion of the inlet port are inside the turbocompressor such that boost air enters the second passage inside the turbocompressor and a combination of purge and boost air exits the integrated boost purge ejector tee inside of the turbocompressor through the outlet of the first passage.

15. The turbocompressor of claim 13 , wherein:
the inlet port is adapted to be in communication with a purge valve of the fuel vapor emissions system, which is in fluid communication with a purge canister of the fuel vapor emissions system;
the nozzle comprises a venturi nozzle; and
in the boost operation mode, the boost air flows through the first passage and the venturi nozzle along the first flow path, thereby creating a vacuum to draw the purge from the purge canister through the inlet port into the first flow path and into the turbocompressor inlet via the first passage outlet.

16. The turbocompressor of claim 13 , further comprising an insert member positioned in the first passage at an end of the first passage opposite the outlet, the insert member including the nozzle and configured to seal off the first passage from an exterior of the turbocompressor, the insert member also including a flow inlet in communication with the nozzle, the flow inlet being in alignment with the second passage and an outlet of the nozzle, which is positioned proximate to and upstream of the intersection of the inlet port and the first passage.

17. The turbocompressor of claim 16 , wherein:
the flow inlet comprises a radial flow passage;
the insert member is positioned at least partially in the second passage such that the radial flow passage is positioned in and in alignmen

Assignees

• Bucknell John R
• Bayer Ethan E
• Schmidt Michael P
• Fca Us Llc

Inventors

• Bucknell John R
• Bayer Ethan E
• Schmidt Michael P

Classifications

• F02M35/10157

  Supercharged engines · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic

• F02M25/089

  Layout of the fuel vapour installation · CPC title

• F02B33/40

  of non-positive-displacement type · CPC title

• F02M35/10229 Primary

  the intake system acting as a vacuum or overpressure source for auxiliary devices, e.g. brake systems; Vacuum chambers (air storage chamber F02B21/00) · CPC title