엔진오일 교환 수리 사례

2026. 6. 30. 작업

난이도 & 준비물

증상

Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

처리 내용

At a base level, carburetors meter the amount of fuel they let into the engine by the amount of air that is moving through them. Vacuum is created by the piston moving in the engine and creating an open space. As the piston moves down, it creates an empty volume which pulls in air through the only opening it can find, which is the passageway through the carburetor. So, for example, a 25 cubic inch cylinder is going to try to pull in 25 cubic inches of air in through the carburetor. However, if the throttle plate is partially or fully closed, it's not going to be able to get that much air in since there's a restriction (much like trying to take a full breath of air through a straw). The more the restriction, the higher the vacuum. Generally, the more throttle you give it, the more the throttle plates open, and the more air it can get in, so the less vacuum there is. Designers quickly realized that the higher the engine vacuum, the less fuel should go into the engine (since more vacuum m