Question: What Is The Purpose Of A Choke?

What is engine choke control?

A choke control is a fuel and air mixture control system found on many carbureted engines.

When an engine carburetor is “choked”, the fuel to air mixture ratio becomes richer (more fuel & less air) than normal, for easier cold starting and to assist in getting the fuel flowing through the system..

Is the choke open or closed?

The choke is a plate in the carburetor that opens and closes to allow more or less air into the engine. When doing a cold start, the choke should be closed to limit the amount of air going in. This increases the amount of fuel in the cylinder and helps to keep the engine running, while it is trying to warm up.

How long should I leave the choke on?

30 secondsThe choke usually “chokes” the air supply into the engine so it gets more petrol than usual. Hence it’s name. You should start the bike from cold with half or full choke depending on how cold it is. After 30 seconds is usually enough for most bikes.

How does choke work?

By restricting the flow of air into the throat of the carburetor, the choke valve reduces the pressure inside the throat, which causes a proportionally-greater amount of fuel to be pushed from the main jet into the combustion chamber during cold-running operation.

How do you start a car with a choke?

How to Use a Manual Choke on a CarPull the manual choke knob to decrease the air intake and provide a richer fuel-to-air ratio before you start the ignition. … Pull out the choke knob more for a cold engine start, or on a cold day. … Switch on the ignition and start the engine.More items…

What is the point of a choke?

The choke is usually located towards the upper end of the carburetor, and provides this mixture by stopping the carburetors air supply. When it does that, it also creates low air pressure inside the carburetor to get more fuel to flow through the main circuit.

When should you choke your engine?

The choke is only used when starting a cold engine. When doing a cold start, the choke should be closed to limit the amount of air going in. This increases the amount of fuel in the cylinder and helps to keep the engine running, while it is trying to warm up.

Is it bad to run an engine with the choke on?

Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. … Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting.

Why do engines need choke?

Its purpose is to restrict the flow of air , thereby enriching the fuel-air mixture while starting the engine. … Choke valves are important for naturally-aspirated gasoline engines because small droplets of gasoline do not evaporate well within a cold engine.

What choke means?

(Entry 1 of 2) transitive verb. 1 : to check or block normal breathing of by compressing or obstructing the trachea or by poisoning or adulterating available air The unwary guard was choked to death by a prisoner.

What happens if the choke is left on?

Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. … The engine needs its fuel to be vaporised in order to burn it. This is done by the carburettor where the fuel is mixed with clean air coming from the air filter, and sent into the pistons to be ignited.