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Electronic Fuel injection is a system of fueldelivery for mixture with air in an internal combustion engine.
HISTORY
Frederic joined Forward gas engine in 1889 and do experiments in fuel injection.
2. Fuel injection was in widespread commercial use in diesel engines by mid 1920s. The direct injection was in employed in some notable designs like Benz, BMW.
3. First gasoline injection system was developed by Bosch and introduced in 1955 in Mercedes Benz-300 SL.
4. The first commercial electronic fuel injection (EFI) system was Electrojector, developed by the Bendix Corporation and was to be offered by American Motors (AMC) in 1957 .
. In 1957, Chevrolet introduced a mechanical fuel injection option, made by General Motors‘.
6. Chrysler offered Electrojector on specific high performance 1958 models…the 300D, the D500 Arguably the first series cars equipped with an EFI system, but the early electronic components were not equal to the rigors of underhood service and were too slow.
7. Bosch developed an electronic fuel injection system, called D-Jetronic (D for Druck, the German word for pressure), which was first used on the VW 1600TL in 1967.
Bosch developed an electronic fuel injection system, called D-Jetronic (D for Druck, the German word for pressure), which was first used on the VW 1600TL in 1967.
In 1982, Bosch introduced a sensor that directly measures the air mass flow into the engine, on their L-Jetronic system. Bosch called this LH-Jetronic system.
The LH-Jetronic system was also the first fully digital EFI system.
Super session of Carburetors
Throughout the 1950s and 1960s, various federal, state and local governments conducted studies into the numerous sources of air pollution. These studies ultimately attributed a significant portion of air pollution to the automobile,.
Main Parts of Carburetors
Main circuit
Idle circuit
Accelerator pump
Power enrichment circuit
Choke
Disadvantages of Carburetors
3 types of Toxic emissions from Carburetors
Carbon Monoxide (C0)
Unburnt Hydrocarbons (HC)
Oxides of Nitrogen (NOx)
These result incomplete combustion of fuel with less oxygen in combustion chamber.
Other Types of Fuel Injection
Throttle Body Injection
Continuous Injection
Central Port Injection
Multi point Fuel Injection
Direct Injection
Electronic Fuel Injection
Parts in EFI
Fuel Injectors
Fuel Pump
Fuel Pressure Regulator
Air flow meter
Throttle valve
Air intake chamber
Electronic control unit
Sensors