The Choke
Date: Jan 11th, 2008 2:12:28 am - Subscribe
Mood: nothing
It is not expected that all of us would know each part of the vehicle and what such part does. But it sure does help if we know what certain parts and features are for so that we can use them as they are designed to be used. For example, what is the choke and what does it do? I am going to share with you on this post just what the choke is all about.
The choke is used on engines with carburetors to help in starting a cold engine. Now, the engine needs to burn fuel rich mixture to start it. The choke is sits at the top of the carburetor and it is its job to keep out air rushing into the combustion chamber. Without that extra air, the engine will be burning a very rich mixture.
Apart from blocking off the entry of air into the combustion chamber, the choke also creates a pressure in the manifold which draws more fuel into the chamber. This means that a very rich fuel mixture will be injected into the engine.
After the engine has been injected with a rich mixture, it would of course need air to continue running. To allow air to enter the carburetor, the choke is designed to be slightly offset on one side which will allow air rushing inside to push it aside. But the choke does not fully allow air to rush in instantly. It slowly allows them in with the aid of a temperature sensitive switch. When the engine temperature reaches a certain pre-set constant, the choke will then no longer block the entrance of air into the system.
