![]() When cam turn to maximum lift position the The plunger creates suction causes fuel flow from the main At the minimum lift position of cam the spring force on the A uniform distribution of fuel is automatically In this system, the pump pressurizes, meters and times theįuel by supplying it to a rotating distributor for injection toĮach cylinder. The amount of fuel is regulated by varying the At given instant, the fuel is injected in a specific cylinder byĪ mechanically operated valve, by means of a push rod and High pressure in the header forces fuel to each of the nozzle In this, a high pressure pump supplies fuel to a header Amount of fuel injected is regulated by the effective stroke Fuel is brought up by a low pressure pump and injectedīy rocker arm actuating the plunger at a given instant Each cylinder is provided with a unit injector In this, pump and injector nozzle are combined in one unit Separate metering and fuel compression pump Each cylinder is provided with a pump& injector providing ![]() Types of solid injection systems used in CI engines Solid injection system used in CI engine is shown ![]() Fuel filters to prevent dust and abrasive particles from entering the pump & injectors to reduce wear & tear of componentsĪ typical arrangement of various components for Injector to take the fuel from the pump and distribute it in the combustion chamber by atomizing it into fine droplets Governor to ensure that the amount of fuel injected is in accordance with variation of load Injection pump to meter and pressurize the fuel for injection Fuel feed pump to supply fuel from fuel tank to FI system Solid injection systems can be classified into Īll the FI systems comprise of following components: Solid Injection system : Liquid fuel is injected directly into combustion chamber. Air Injection system : Fuel is forced by means of compressed air. No lag during beginning and end of injection to eliminate dribbling of fuel droplets into the cylinderĪir Injection system and Solid Injection system To supply equal quantities of metered fuel to all cylinders in case of multi cylinder engines. Uniform distribution of fuel droplets throughout the combustion chamber. Proper spray pattern to ensure rapid mixing of fuel & air ![]() Proper atomization of fuel into fine droplets Proper control of rate of injection to achieve desired heat release during combustion without knocking. Performance power, fuel economy, emissions ![]() Precise timing of fuel injection in the cycle to ensure Accurate metering of fuel injected per cycle to meet changing demand of speed & load The following requirements must be met by the Fuel Depending upon the demand requirements the fuel injection system continues toĭeliver the fuel during initial part of combustion.įunctional Requirements of an Injection Systemįor proper engine operation and satisfactory performance, Due to continued heat transfer from hot air to fuel, the fuel reaches to its self ignition temperature to ignite spontaneously It is atomized as it enters under high velocity and the droplets get vaporized
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |