UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Measurements of in-cylinder mixture strength and fuel accumulation in the inlet port of a gasoline-injected engine during very rapid throttle openings

Ladommatos, N; Rose, D; (1998) Measurements of in-cylinder mixture strength and fuel accumulation in the inlet port of a gasoline-injected engine during very rapid throttle openings. P I MECH ENG D-J AUT , 212 (D2) 103 - 118.

Full text not available from this repository.

Abstract

The mixture strength in a cylinder of a port-injected gasoline engine was monitored continuously during very rapid throttle openings. The data on mixture strength were combined with other engine data collected in order to obtain for each successive engine cycle: the air-fuel ratio within the cylinder and the change in the fuel mass accumulating on the inlet port of the cylinder being monitored.The four-cylinder spark-ignition engine used had a displacement of 1.6 litre, four valves per cylinder and multipoint sequential fuel injection controlled by an electronic management system programmed for three-way catalyst operation. All tests were conducted with the engine coolant at the temperature of 90 degrees C and at a constant engine speed of 2000 r/min. The engine transient involved very rapid throttle openings which were completed within about 15 ms. Small and large throttle openings were investigated along with the effect of altering the type and condition of the fuel injectors.The engine response to the fast throttle opening comprised a sharp rise in the air-fuel ratio (maximum gravimetric air-fuel ratio of around 25:1) which lasted for only a single cycle, followed by a drop in the air-fuel ratio (minimum air-fuel ratio of about 10:1) and, subsequently, a gradual rise towards a stoichiometric air-fuel ratio within about 10 engine cycles.

Type: Article
Title: Measurements of in-cylinder mixture strength and fuel accumulation in the inlet port of a gasoline-injected engine during very rapid throttle openings
Keywords: spark ignition engines, mixture preparation, fuel injection, load transients, air-fuel ratio, inlet fuel film, in-cylinder measurements
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/106700
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item