What was used before fuel injection?
Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. On petrol engines, fuel injection replaced carburetors from the 1980s onward.
Carbureted vs Fuel Injected. In carbureted engines, the fuel/air mixture meets in the carburetor. The mixture then goes to each cylinder through the air intakes. In the fuel injected engine, the fuel and air do not mix until they reach the cylinder.
- The carburetor has several functions 1) it combines gasoline and air creating a highly combustible mixture, 2) regulates the ratio of fuel, 3) controls engine's speed main function is to mix in correct ensure proper engine.
- Even the retro-styled Honda CB1100, with its air-cooled engine, has a fuel-injection system, not carburetors. But, with pollution laws really starting to have teeth for motorcycles, the manufacturers used the finer control of the air/fuel mixture that's made possible by fuel injection to meet the letter of the law.
- At first, carburetors were replaced with throttle body fuel injection systems (also known as single point or central fuel injection systems) that incorporated electrically controlled fuel-injector valves into the throttle body.
Carburetors on cars operated the same way. To start the car, you had to pull out the choke and let the engine warm up. Modern fuel injection systems don't require this warm-up period. There are some very obscure auto makers, primarily in Africa and Russia, who still build cars with carburetors.
- All production vehicles today use computerized fuel injection systems to feed fuel and air into the combustion chamber of the engine. After that, you have to let the engine warm up. Otherwise, it simply won't run right. Carburetors on cars operated the same way.
- This works much like the spray nozzle of a hose, ensuring that the fuel comes out as a fine mist. The fuel mixes with the air passing through the inlet manifold or port and the fuel/air mixture enters the combustion chamber. Some cars have multi-point fuel injection where each cylinder is fed by its own injector.
- The carburetor is probably the most misunderstood mechanical part on a motorcycle and many small engine machines. All engines require a proper mixture of air and fuel for combustion; the strange device known as the carburetor controls the ratio of the fuel/air mixture entering the engine.
A TBI system is similar to a carburetor in that one or two injectors are located in a central throttle body that supplies fuel to the engine through the intake manifold. Instead of using engine vacuum to siphon fuel through metering circuits as a carburetor does, fuel is sprayed into the manifold through the injectors.
- The fuel pump is an integral element of any car or truck. Given the responsibility of literally pumping a vehicle's fuel from its tank to the engine, a malfunctioning fuel pump will usually lead to total disaster. This guide is designed to explain the five most common signs of a failing fuel pump.
- Mechanical fuel injection is used to indicate the metering functions of the fuel injection system. Carburetor fuel injection is an advancement of the mechanical fuel injection method. The aim of all types of fuel injections systems is to achieve a delivery of the exact air/fuel mix into the combustion engine.
- Fuel injector symptoms for bad, faulty, dirty, clogged, or leaking injectors are :
- Starting issues.
- Poor idle.
- Failed emissions.
- Poor Performance.
- Engine does not reach full RPM.
- Increased fuel consumption.
- Rough engine performance.
- Surging and bucking under various throttle loads.
Updated: 24th September 2018