A purge ejector assembly for an engine having a compressor, comprising: - a first fluid passage defining a fluid connection between an engine manifold port and air inlet channel port; - a nozzle device disposed in said first fluid passage and configured to raise the flow velocity of the air flowing in said first fluid passage; - a first valve disposed in said first fluid passage at a position in-between said engine manifold port and said nozzle device, said first valve being configured to permit fluid to flow through said first valve from said engine manifold port toward said nozzle device, while restricting fluid to flow through said first valve from said nozzle device toward said engine manifold port; - a second fluid passage defining a fluid connection between a purge flow port connectable to a canister purge passage and said engine manifold port; - a second valve disposed in said second fluid passage at a position in-between said engine manifold port and said purge flow port, said second valve being configured to permit fluid to flow through said second valve from said purge flow port toward said engine manifold port, while restricting fluid to flow through said second valve from said engine manifold port toward said purge flow port, thereby enabling evaporated fuel to flow in said second fluid passage from said canister purge passage to said engine manifold port when said assembly is subjected to a negative pressure via said engine manifold port; - a third fluid passage defining a fluid connection between said purge flow port and said air inlet channel port, and extending from a second fluid passage position located between said purge flow port and said second valve to a first fluid passage position located between said nozzle device and said air inlet channel port; - a third valve disposed in said third fluid passage and configured to permit fluid to flow through said third valve from said purge flow port toward said air inlet channel port, while restricting fluid to flow through said third valve from said air inlet channel port toward said purge flow port, thereby enabling evaporated fuel to flow in said third fluid passage from said canister purge passage to said air inlet channel port when said assembly is subjected to a positive pressure via said engine manifold port forming a negative pressure in said third fluid passage wherein the purge ejector assembly is an assembled single unit. - a first fluid passage defining a fluid connection between an engine manifold port and air inlet channel port; - a nozzle device disposed in said first fluid passage and configured to raise the flow velocity of the air flowing in said first fluid passage; - a first valve disposed in said first fluid passage at a position in-between said engine manifold port and said nozzle device, said first valve being configured to permit fluid to flow through said first valve from said engine manifold port toward said nozzle device, while restricting fluid to flow through said first valve from said nozzle device toward said engine manifold port; - a second fluid passage defining a fluid connection between a purge flow port connectable to a canister purge passage and said engine manifold port; - a second valve disposed in said second fluid passage at a position in-between said engine manifold port and said purge flow port, said second valve being configured to permit fluid to flow through said second valve from said purge flow port toward said engine manifold port, while restricting fluid to flow through said second valve from said engine manifold port toward said purge flow port, thereby enabling evaporated fuel to flow in said second fluid passage from said canister purge passage to said engine manifold port when said assembly is subjected to a negative pressure via said engine manifold port; - a third fluid passage defining a fluid connection between said purge flow port and said air inlet channel port, and extending from a second fluid passage position located between said purge flow port and said second valve to a first fluid passage position located between said nozzle device and said air inlet channel port; - a third valve disposed in said third fluid passage and configured to permit fluid to flow through said third valve from said purge flow port toward said air inlet channel port, while restricting fluid to flow through said third valve from said air inlet channel port toward said purge flow port, thereby enabling evaporated fuel to flow in said third fluid passage from said canister purge passage to said air inlet channel port when said assembly is subjected to a positive pressure via said engine manifold port forming a negative pressure in said third fluid passage