China Electronic Fuel Injection (EFI) Technique Report, 2015
Abstract: A number of heavy-duty diesel engine suppliers have created their own electronic fuel injection systems. This technique was employed on the hot bulb engine and was adapted and improved by Bosch and Clessie Cummins for use on diesel engines ( Rudolf Diesel ‘s original method employed a cumbersome ‘air-blast’ technique making use of highly compressed air citation required ). Fuel injection was in widespread industrial use in diesel engines by the mid-1920s. The fuel injector injects liquid fuel into the intake air (the location of the fuel injector varies between systems).
The open loop fuel injection systems had currently enhanced cylinder-to-cylinder fuel distribution and engine operation more than a wide temperature range, but did not present further scope to enough control fuel/air mixtures, in order to additional decrease exhaust emissions. Single-point injection (SPI) makes use of a single injector at the throttle physique (the same place as was employed by carburetors).
The procedure of determining the necessary amount of fuel, and its delivery into the engine, are recognized as fuel metering. In addition, fuel injection conversion require to transform manage system tactic, hence the require for higher costs. The first automotive direct injection system applied to run on gasoline was developed by Bosch , and was introduced by Goliath for their Goliath GP700 automobile, and Gutbrod in 1952.
This was basically a higher-pressure diesel direct-injection pump with an intake throttle valve. Swirl injectors are utilized in liquid rocket, gas turbine, and diesel engines to strengthen atomization and mixing efficiency. The first subgroup covers Multi Port Fuel Injection and the following parts: throttle physique, throttle position sensor, basic idle speed, fuel pressure, fuel pump, engine manage relay, fuel pump relay, intake air temperature sensor, oxygen sensor, injector, engine ecu, throttle physique assy.
The second group covers fuel line supply from …
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The following guide mostly discusses multi-port electronic fuel injection systems due to the fact it is the dominate technique applied in most performance and racing applications. Earlier systems, relying on easier injectors, frequently injected into a sub-chamber shaped to swirl the compressed air and strengthen combustion this was recognized as indirect injection However, this was much less efficient than the now frequent direct injection in which initiation of combustion takes location in a depression (often toroidal ) in the crown of the piston.
Likewise, the air intake filter that was featured in older vehicles has been replaced by far more effective filters that are in a new place. The fuel have to be delivered to the injectors at the appropriate pressure so the quantity injected can be accurately metered, so the fuel method is designed to recover fuel from the tank and increase and regulate this stress by signifies of a sophisticated mechanical pump. Injection pressure is restricted to a maximum of one hundred bar, (or one hundred times regular air pressure at sea level) and a single injector per cylinder must be positioned in the inlet tract.
Alat Peraga ini dapat menunjukkan struktur dan prinsip kerja Engine Management Program Kijang EFI, sehingga dapat membantu siswa dalam memahami masalah sistem Engine Management Program Kijang EFI. From vapid 350s to killer major-blocks, Edelbrock can handle them all with its many EFI program offerings. When ACCEL replaced its venerable Gen VI DFI program with the new Gen VII, critics balked that its computer software was too cumbersome to navigate. Some of the additional well known aftermarket systems are ACCEL’s DFI technique, Electromotive’s TEC system, or a Motec program. From there, some programmers enable additional alteration of the fuel and ignition curves. An EFI technique consists of a fuel pump, fuel injectors, sensors and an Engine Control Unit (ECU).