Programmed fuel injection
Encyclopedia
Programmed Fuel Injection, or PGMFI/PGM-FI, is an electronic fuel injection
system initially developed by Honda
more than 20 years ago. This system has been applied to Honda motorcycles, Formula One
racing cars, and automobiles.
). The 1986 Honda Civics were the first Civics to feature PGM-FI. In 1998, Honda built the first motorcycle with PGM-FI, the VFR800FI. Honda had this system copyrighted from 1987-1997.
has sensors which measure the temperatures of the engine, coolant, oil, and outside air as well as pressure sensors to monitor oil and barometric pressure. Based on these readings and the location of the throttle, the ECU calculates how much oxygen and fuel should be mixed for optimal and efficient performance.
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
system initially developed by Honda
Honda
is a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...
more than 20 years ago. This system has been applied to Honda motorcycles, Formula One
Formula One
Formula One, also known as Formula 1 or F1 and referred to officially as the FIA Formula One World Championship, is the highest class of single seater auto racing sanctioned by the Fédération Internationale de l'Automobile . The "formula" designation in the name refers to a set of rules with which...
racing cars, and automobiles.
History
Since the advent of electronic fuel injection (EFI), Honda has used this method to their full advantage. Honda offered some of the first low priced vehicles in North America to employ programmed fuel injection. Originally developed for racing cars, PGM-FI made its way into Honda automobiles in the late 1980s in their Accord and Prelude models which featured the Honda A20A, A20A3 & A20A4 engines (Honda A engineHonda A engine
-History:The Honda A-series engines succeeded the earlier EZ, ES, BS and ET engines in the Honda Accord and Prelude. There were several variations, ranging from the 1.6 liter A16A to the 2.0 liter A20A. All A-series engines have iron blocks with single overhead camshaft aluminum heads...
). The 1986 Honda Civics were the first Civics to feature PGM-FI. In 1998, Honda built the first motorcycle with PGM-FI, the VFR800FI. Honda had this system copyrighted from 1987-1997.
Operation
PGM-FI works by injecting the right amount of fuel per cylinder based on specific engine data. The Engine Control Unit (ECU)Engine Control Unit
An engine control unit is a type of electronic control unit that determines the amount of fuel, ignition timing and other parameters an internal combustion engine needs to keep running...
has sensors which measure the temperatures of the engine, coolant, oil, and outside air as well as pressure sensors to monitor oil and barometric pressure. Based on these readings and the location of the throttle, the ECU calculates how much oxygen and fuel should be mixed for optimal and efficient performance.