QuestionJune 25, 2025

What step in operation occurs after fuel tank vapors are routed to the carbon canister? A) The EVAP system captures gasoline vapors. B) The air-vapor mixture is purged into the engine to be burned. C) When the purge valve is duty cycled, fresh air is drawn to the canister. D) The vapors escape into the atmosphere.

What step in operation occurs after fuel tank vapors are routed to the carbon canister? A) The EVAP system captures gasoline vapors. B) The air-vapor mixture is purged into the engine to be burned. C) When the purge valve is duty cycled, fresh air is drawn to the canister. D) The vapors escape into the atmosphere.
What step in operation occurs after fuel tank vapors are routed to the
carbon canister?
A) The EVAP system captures gasoline vapors.
B) The air-vapor mixture is purged into the engine to be burned.
C) When the purge valve is duty cycled, fresh air is drawn to the canister.
D) The vapors escape into the atmosphere.

Solution
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Answer

B) The air-vapor mixture is purged into the engine to be burned. Explanation 1. Understanding the EVAP System The Evaporative Emission Control (EVAP) system is designed to prevent fuel vapors from escaping into the atmosphere. It captures and stores these vapors in a carbon canister. 2. Routing of Fuel Tank Vapors After fuel tank vapors are routed to the carbon canister, they are stored temporarily until they can be purged. 3. Purging Process The next step involves purging the air-vapor mixture from the carbon canister into the engine to be burned. This occurs when the purge valve opens, allowing the vapors to enter the intake manifold and be combusted in the engine.

Explanation

1. Understanding the EVAP System<br /> The Evaporative Emission Control (EVAP) system is designed to prevent fuel vapors from escaping into the atmosphere. It captures and stores these vapors in a carbon canister.<br /><br />2. Routing of Fuel Tank Vapors<br /> After fuel tank vapors are routed to the carbon canister, they are stored temporarily until they can be purged.<br /><br />3. Purging Process<br /> The next step involves purging the air-vapor mixture from the carbon canister into the engine to be burned. This occurs when the purge valve opens, allowing the vapors to enter the intake manifold and be combusted in the engine.
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