How Does the Carbon Canister in a Car Work?
2 Answers
The principle of the carbon canister in a car is based on the recovery and reuse of fuel vapor. Here is some information about the automotive carbon canister: 1. Working Principle: Utilizing the breathing effect in coordination with the carbon canister, when the vehicle is stationary, the fuel in the fuel tank volatilizes due to its own properties. The vapor enters the evaporation zone of the carbon canister through pipelines and is immediately adsorbed by activated carbon, condensing and reverting into liquid fuel. Excess gases are then expelled through the breathing port. When the engine operates at medium to high speeds, the solenoid valve is energized, opening the pipeline. The vacuum in the engine's intake manifold then draws the combustible gases from the carbon canister into the cylinders to participate in combustion. Simultaneously, external air enters the carbon canister through the breathing port, flows through the internal absorption layer, mixes with the fuel to form combustible gas, and enters the engine's intake pipe. During this process, the activated carbon in the canister is gradually restored due to the suction effect of the engine. 2. Function: To reduce the emission of gasoline vapors from the car's fuel tank and carburetor. The canister contains active materials. When the engine is running and the solenoid valve is activated, the engine draws the fuel vapors from the tank and the vapors adsorbed by the active materials into the intake pipe. When the engine is not running or the solenoid valve is not activated, the vapors from the fuel tank enter the activated carbon canister and are absorbed by the active materials.
The carbon canister is an environmental protection expert in the car. Simply put, the gasoline vapor evaporating from the fuel tank cannot be directly released into the air to pollute the environment. The carbon canister is a container filled with activated carbon, which can adsorb and store these vapors. Normally, when the engine is not running, the vapor is absorbed; when the engine is working, the ECU opens a valve to draw these vapors into the engine to be burned together. This not only reduces exhaust emissions but also saves a bit of fuel waste. Without it, you might smell gasoline when parking, which is unpleasant. I recommend checking the carbon canister pipes regularly to ensure they are not clogged, especially after a few years of driving, as dust may accumulate. Overall, this small device makes the car cleaner and more economical.
