What causes fuel injectors to get dirty and clogged?
Fuel injectors introduce fuel into the engine combustion chamber at a controlled rate. All diesel engines have injectors whilst some older petrol engines (pre 1980’s) use the alternative of a carburetor.
Injectors have tiny nozzles that under pressure allow for precise amounts of fuel to added to the air fuel
mix ratio which in turn ensures a safe and efficient combustion. Engines by vary of design have either multiple injectors (one per cylinder) or single point injection where there is one injector for all cylinders.
For fuel efficiency and emissions benefits today’s fuel injector work to extremely tight tolerances producing a finer spray that allows for better mix with the air as it enters the chambers. The production of such precise fuel delivery means these injectors are costly and don’t necessarily fail but due to the carbon deposits issue it is possible for them become restricted and clogged.
Restricted or clogged injectors reduce the flow of fuel and disrupt the spray pattern which is critical for an even combustion. Uneven spray can cause stuttering acceleration and lack of power. The most common cause of of fuel injector issues is carbon build up. When this is combined with high temperatures it leads to excessive fuel inside the injector nozzles burning. It’s a known fact that low quality fuel can worsen such problems.
How to prevent fuel injectors from getting dirty and clogged?
- Deposit control additives
- Antioxidents and stability improver
- Cold flow improver
- Anti-static additives
- Corrosive inhibitors
Premium fuels contain a mixture of additives that unlike standard fuels provide the following benefits:-
- keep injectors and other engine components clean
- improved performance by keeping the engine running efficiently
- keeping emissions down
- vibration and noise reduction
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