Q:

What is a purge valve in a car?

A:

Quick Answer

A car's purge valve is a mechanism that directs the vapors emitted by the engine fuel from the fuel tank to the intake manifold. The purge valve also stores the fuel vapors for future combustion, allowing it to be recycled back into the engine combustion process when needed.

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What is a purge valve in a car?
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Full Answer

The purge valve also helps in preventing toxic gases from being released into the atmosphere, since it redirects the gases from the fuel instead of emitting them. It also helps the engine use fuel more efficiently, which then contributes to less fuel consumption. The valve also collects air from outside the car and moves it to the fuel tank, helping the engine burn the fuel more effectively by providing it with more oxygen.

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Related Questions

  • Q:

    What is the function of a canister purge valve?

    A:

    The function of a vehicle's canister purge valve is to control exactly how much fuel vapor gets purged from the charcoal canister where the vapors are temporarily stored after being trapped by the Evaporative Emission Control (EVAP) system. The purpose of this entire system is to keep potentially harmful fuel vapors from leaking into the air.

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  • Q:

    Where are canister purge valves located?

    A:

    Canister purge valves are located between the fuel tank and the engine and are often placed in or on the throttle bay in models of car from the 1990s, 2000s and 2010s. In models from the 1970s and 1980s, the valve is in the engine bay.

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  • Q:

    What is the EVAP purge valve?

    A:

    The vehicle evaporative emission control system purge valve regulates how much fuel vapor the system purges from the charcoal canister that traps and stores the vapor. When the engine is running, sensors trigger the check engine light if the purge valve allows a vapor flow greater or less than normal.

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  • Q:

    Where are typical locations of fuel pumps in cars?

    A:

    The most common location for the fuel pump on modern vehicles is inside the fuel tank or mounted underneath the vehicle on the frame rail somewhere between the fuel tank and the engine. Some modern vehicles com with two fuel pumps, one in each of these locations.

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