Boost purge ejector tee arrangement
View Patent ↗A boost purge ejector tee arrangement for a fuel vapor emissions system can include a boost purge ejector tee having a body that can define a first inlet port, a second inlet port and an outlet port. The first inlet port and the outlet port can be fluidly coupled along a first flow path. The body can define a second flow path from the second inlet port that can intersect the first flow path upstream of the outlet port. A nozzle can be positioned in the first flow path such that an outlet of the nozzle can be proximate the intersection of the second flow path with the first flow path. The boost purge ejector tee can be integrated into an air box that can be associated with an engine such that the outlet port exits into an inside of the air box.
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 having:
a body defining a first inlet port, a second inlet port and an outlet port, the first inlet port and the outlet port being fluidly coupled along a first flow path, the body defining a second flow path from the second inlet port that intersects the first flow path upstream of the outlet port; and
a nozzle positioned in the first flow path such that an outlet of the nozzle is proximate the intersection of the second flow path with the first flow path;
wherein the boost purge ejector tee is integrated into an air box associated with the engine such that the outlet port exits into an inside of the air box.
2. The boost purge ejector tee arrangement of claim 1 , wherein the outlet port is positioned inside the air box and the first and second inlet ports extend external to the air box.
3. The boost purge ejector tee arrangement of claim 2 , wherein the body further defines a mounting flange, the mounting flange adapted to engage the air box to connect the boost purge ejector tee thereto, the first and second inlet ports extending from a first side of the mounting flange and the outlet port extending from a second opposite side of the mounting flange.
4. The boost purge ejector tee arrangement of claim 3 , wherein the body further defines a connecting portion on the second side of the mounting flange that forms at least a portion of the second flow path from the second inlet port to the intersection with the first flow path.
5. The boost purge ejector tee arrangement of claim 1 , wherein the first inlet port includes a greater diameter than the second inlet port.
6. The boost purge ejector tee arrangement of claim 1 , wherein the first inlet port and the outlet port are substantially coaxial.
7. The boost purge ejector tee arrangement of claim 1 , wherein the first inlet port includes a greater diameter than the outlet port.
8. The boost purge ejector tee arrangement of claim 2 , wherein the first inlet port is in fluid communication with a first air flow line adapted to receive boost pressure from the forced induction system during a boost mode; and
wherein the second inlet port is in fluid 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.
9. The boost purge ejector tee arrangement of claim 8 , wherein the nozzle comprises a venturi nozzle; and
wherein in a boost mode, the boost pressure flows through the first inlet port and the venturi nozzle, thereby creating a vacuum to draw purge from the purge canister into the first flow path and into the air box via the outlet port.
10. The boost purge ejector tee arrangement of claim 9 , wherein the vacuum draws purge from the purge canister through the purge valve and into a fluid line in fluid communication with the purge valve and directly coupled to the second inlet port.
11. The boost purge ejector tee arrangement of claim 10 , wherein the first inlet port is in direct fluid communication with the first air flow line, and wherein the second inlet port is in direct fluid communication with the purge valve.
12. The boost purge ejector tee arrangement of claim 11 , wherein the boost purge ejector tee is directly connected to the air box.
13. The boost purge ejector tee arrangement of claim 12 , wherein the body defines only two inlet ports, which are positioned external to the air box, and only one outlet port, which exits into the inside of the air box.
14. The boost purge ejector tee arrangement of claim 1 , wherein the forced induction system includes a turbocharger.
15. A boost purge ejector tee arrangement for a fuel vapor emissions system coupled to an intake manifold of an internal combustion engine with a forced induction system and of the type including a purge canister and a purge valve, comprising:
a boost purge ejector tee integrated into an air box associated with the engine, the boost purge ejector tee having:
a body defining a first inlet port, a second inlet port and an outlet port, the first inlet port and the outlet port being fluidly coupled along a first flow path, the body defining a second flow path from the second inlet port that intersects the first flow path upstream of the outlet port, the outlet port exiting into an inside of the air box and the first and second inlet ports positioned external to the air box; and
a venturi nozzle positioned in the first flow path such that an outlet of the venturi nozzle is proximate the intersection of the second flow path with the first flow path;
wherein the first inlet port is directly coupled to an outlet of the forced induction system and the second inlet port is in direct fluid communication with the purge valve; and
wherein during a boost operational mode, the first inlet port is adapted to receive boost air flow, which flows through the venturi nozzle thereby creating a vacuum and drawing purge through the second inlet port.
16. The boost purge ejector tee arrangement of claim 15 , wherein the body further defines a mounting flange, the mounting flange adapted to engage the air box to connect the boost purge ejector tee thereto, the first and second outlet ports extending from a first side of the mounting flange external to the air box and the outlet port extending from a second opposite side of the mounting flange inside the air box.
17. The boost purge ejector tee arrangement of claim 16 , wherein the body defines only two inlet ports, which are positioned external to the air box, and only one outlet port, which exits into the inside of the air box.
18. The boost purge ejector tee arrangement of claim 15 , wherein the vacuum draws purge from the purge canister through the purge valve and into a fluid line in direct fluid communication with the purge valve and directly coupled to the second inlet port.
19. The boost purge ejector tee arrangement of claim 15 , wherein the second inlet port is in direct fluid communication with the first flow path and the outlet port.