Programmed Fuel Injection, or PGMFI/PGM-FI, is the name given by

Honda is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan. Honda has been the world's largest motorcycle manufacturer since 1959, reaching a producti ...

to a proprietary digital electronic

fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All com ...

system for

internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal co ...

s with port injection. It is available since the early 1980s. This system has been implemented on

motorcycles A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruisin ...

automobiles A car or automobile is a motor vehicle with wheels. Most definitions of ''cars'' say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people instead of goods. The year 1886 is regarded ...

, and

outboard motors An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method o ...

History

With its origins beginning with the CX500 and CX650 turbocharged motorcycles in 1982 and 1983, respectively, Honda's PGM-FI made its way into their automobiles in the early 1980s with the ER engine equipped

City Turbo The first generation Honda City (Honda Jazz in Europe) was a subcompact hatchback aimed mainly at the Japanese domestic market. The somewhat uniquely designed City, referred to by Honda as "Tall Boy" style, was also marketed abroad and was availa ...

. The system gained popularity in the late 1980s in their Accord and Prelude models with A20A, A20A3 & A20A4 engines ( Honda A engine), and its motorcycles later on. In 1998, Honda built its third motorcycle with fuel injection; the VFR800FI.

Operation

The PGM-FI system relies on a

piezoelectric sensor A piezoelectric sensor is a device that uses the piezoelectric effect to measure changes in pressure, acceleration, temperature, strain, or force by converting them to an electrical charge. The prefix ''piezo-'' is Greek for 'press' or 'squeez ...

to indirectly measure the air quantity, and interprets the data using performance maps. Fuel is injected intermittently into the inlet ports. The PGM-FI also has a trailing throttle fuel cutoff and a self-diagnosis system.Olaf von Fersen (ed.): EIN JAHRHUNDERT AUTOMOBILTECHNIK • PERSONENWAGEN, VDI-Verlag, Düsseldorf 1986, . p. 263-264

References

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External links

Honda Article on PGM-FI in motorcycles
Honda engines Motorcycle engines Fuel injection systems