Fuel vapor processing apparatus

A fuel vapor processing apparatus for a supercharged internal combustion engine including a supercharging device disposed in an intake passage of the engine, the fuel vapor processing apparatus comprising:

• a canister configured to adsorb fuel vapor from a fuel tank;
• and
• an ejector configured to generate a negative pressure by supercharged air flowing in the intake passage on a downstream side of the supercharging device, so that fuel vapor in the canister is purged by the negative pressure;
• wherein an ejector housing of the ejector includes a discharge port for the supercharged air;
• wherein the ejector housing is formed integrally with a passage wall of the intake passage such that the supercharged air is discharged from the discharge port into the intake passage on the downstream side of the supercharging device;
• wherein the ejector housing includes an introduction port for the supercharged air;
• and
• wherein the introduction port is disposed within the intake passage.

A fuel vapor processing apparatus for a supercharged internal combustion engine including a supercharging device disposed in an intake passage of the engine, the fuel vapor processing apparatus comprising:

• a canister configured to adsorb fuel vapor from a fuel tank;
• an ejector configured to generate a negative pressure by supercharged air produced by the supercharging device, so that fuel vapor in the canister is purged by the negative pressure;
• and
• a flow control valve disposed in the ejector, wherein;
• the ejector is disposed in a portion of the intake passage on a downstream side of the supercharging device;
• the flow control valve includes a spring biases a valve body of the flow control valve in a valve opening direction with a biasing force;
• and
• the flow control valve is configured to control a flow rate of supercharged air flowing into a nozzle portion of the ejector according to both a supercharging pressure of the supercharged air and the biasing force of the spring.

A fuel vapor processing apparatus for a supercharged internal combustion engine including a supercharging device disposed in an intake passage of the engine, the fuel vapor processing apparatus comprising:

• a canister configured to adsorb fuel vapor from a fuel tank;
• and
• an ejector configured to generate a negative pressure by supercharged air flowing in the intake passage on a downstream side of the supercharging device, so that fuel vapor in the canister is purged by the negative pressure;
• wherein an ejector housing of the ejector is integrated with a passage wall of the intake passage such that the supercharged air is discharged into the intake passage on the downstream side of the supercharging device and that the discharge direction of the supercharged air is parallel to a direction of flow of intake air;
• wherein the ejector housing includes an introduction port for the supercharged air;
• and
• wherein the introduction port is disposed within the intake passage.