How Direct Fuel Injection Works

To start out with, gas engines were mainly utilized carburetors to help prepare the gas and air mixture. This method had an inaccuracy that has prompted the creating of a direct fuel injection. Direct fuel injection results in a more efficient burn and reduced emissions. In this article I will go into a bit of detail to help you understand how direct fuel injection works, along with it advantages and disadvantages. It is said that a large number of vehicles will be created with this type of engine installed in the future. It is a very worthwhile thing to learn and become knowledgeable with due to this fact.

How Direct Fuel Injection Works:In a lot of the gasoline fueled vehicles, the engines operate on a 4-stroke cycle. A 4-stroke cycle engine’s first step is to open its valves and cylinders are then filled with an air and gasoline mixture. After this step, the valves will close and the pistons will move up and down, which compresses the mixture. Once this has happened, the ignition is triggered, which sends the pistons down towards what is called the power stroke. The last step involves the exhaust valve to open and the piston to travel upward, which forces out the waste exhaust.

Within a carbureted vehicle, the blend of fuel is mixed prior to entering the cylinder during the first stroke. However, with direct injection, the gas is sprayed within the cylinder as the air enters through the intake manifold.

AdvantagesThere are many advantages to a direct injected engine.

#1 Advantage: Involves an improvement in fuel economy and a greater power output. – Each gas burst is measured precisely and timed by a computer onboard. This helps to translate more efficiency and a lot less pollution.

#2 Advantage: Ultra fine droplets are dispersed evenly creating by the system which has a cooling effect upon the engine which causes a power increase across the whole RPM band. – When it is running, the computer varies continually the differences in the air-to-gas ratio to make sure it is giving the best performance.There are three modes:

Full Power. Ultra Lean Burn. Stoichiometric.

Full Power: Within a full power burn, it has a very rich mixture. This helps the vehicle to accelerate quicker and assist knock prevention.Ultra Lean Burn: Within ultra lean burn, the ratio can be as much as 65:1. This provides a reduction in emission in lower stressing situations.Stoichometric: Within stoichometric mode, the engine will run around 14.7:1 mixture. This is the optimum combination that provides 100% burn. This is utilized for a moderate stressing situation.

Disadvantages#1 Disadvantage: Direct injection systems are very costly and difficult to build. This results in a concentration among high-performance vehicles.

#2 Disadvantage: The component durability is a disadvantage. The assembly must be made to withstand a high pressure amount of gas along with the heat and pressure within the cylinder for long periods of time.

#3 Disadvantage: It requires a very accurate assembly in order to make it spray correctly. The tightness of tolerance can make for unreliable assembly, especially if the engine is placed in high-stressing situations or driven for a lot of miles many times.

Pricing seem to remain pretty steep currently, but the performance improvements and efficiency of the fuel is most likely to be adopted by other types of automobile models. Sooner or later, carburetors will be a thing of the past and all will be turning to direct fuel injection.

For more information on direct fuel injection, please log onto http://www.rj-performance.com/. Much more information is available for you here along with excellent customer service to assist you in any way you may require.