Programmed fuel injection

Programmed Fuel Injection, or PGMFI/PGM-FI, is the name given by Honda to a proprietary digital electronic fuel injection system for internal combustion engines with port injection. It is available since the early 1980s. This system has been implemented on motorcycles, automobiles, and outboard motors.

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 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 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.[1]

gollark: As I said, it's not doing *much* to other people but it is doing something, which is why your threshold for that should probably be... above zero?
gollark: If you refuse to use more private ones, that forces privacy-liking people who want to communicate with you onto worse ones.
gollark: Like I said, a big example is with messaging apps and social networks.
gollark: Maybe it should be.
gollark: It *does do things*, you can hardly say it doesn't. They might not be significant things, but they're there.

References
  1. Olaf von Fersen (ed.): EIN JAHRHUNDERT AUTOMOBILTECHNIK • PERSONENWAGEN, VDI-Verlag, Düsseldorf 1986, ISBN 978-3-642-95773-4. p. 263-264
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