Q
what does an engine choke do
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An engine choke is a device primarily found in internal combustion engines that enhances the engine's startability in cold conditions. By restricting the air supply to the fuel-air mixture, the choke enriches the mixture, making it more combustible. This is crucial for cold starts because fuel vaporizes less efficiently at lower temperatures, necessitating a richer mixture for successful ignition. In carbureted engines, this is often achieved by a manual or automatic mechanism that closes a choke valve. With the advancement in fuel injection technology, the traditional manual choke has been largely replaced by automatic systems that adjust the air-fuel mixture electronically. Using a choke correctly is essential; leaving it engaged too long can lead to over-fueling, increasing emissions and potentially harming the engine.
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