How to check bandwidth

Long-term operation of the engine leads to a change in orifice nozzle, which is reduced due to the deposition of resinous substances, or increases as a result of the passage of fuel. Once or twice a year, depending on usage, you need to check the throughput capacity of the nozzles.

You will need

• - water
• tube
• - beaker
• - stopwatch

Instruction

1. Rinse the nozzle in unleaded gasoline, and then in acetone. If the nozzle hole are resinous substances, carefully remove them soaked in acetone with a wooden skewer.
2. To check the throughput of the nozzles use a special device, acting on the principle of measuring the amount of water leaking from absolute and relative measurements. Make such a device from a small reservoir with two tubes, located at the very bottom.
3. One tube (drain) clip so that, exceeding the required level, the water after it has been drained from the tank. The other tube (the discharge) should serve to create a liquid column. At the end of rubber tube with a nozzle.
4. Under pressure the tube, place the beaker with graduations of not more than 5 cm3 with a volume of 0.5 l to Prepare a watch with a second hand or a stopwatch.
5. Ensure a continuous flow of water into the tank from the water supply. The amount of liquid ejected through a calibrated orifice of the nozzle in one minute, determine its carrying capacity. To do this, place a beaker under a stream and note the time. After exactly 60 seconds, remove the beaker from under the water.
6. The scale division of the beakers, which stops opposite the meniscus of the water corresponds to the throughput of the nozzle in cm3/ min, ensure that the direction of the spilling of the water jet corresponds to the direction in which it passes through the air or gasoline.
7. To reduce the handling ability of the nozzle to a position between the piercer inserted in the base output and input facets of the calibrated holes on two sides. Abut one of the two is inserted a beard in a hard surface and hit with a hammer on the second. So you upset the body of the nozzle, reducing the hole diameter and decreasing the throughput capacity.