Mixture Preparation in a SI Engine with Port Fuel Injection During Starting and Warm-Up Massachusetts Institute of Technology

Format:

Conference/Event

Author/Creator:

Fox, J. W., author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1992-10-19 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1992

Summary:

The in-cylinder hydrocarbon (HC) mole fraction was measured on a cycle-resolved basis during simulated starting and warm-up of a port-injected single-cylinder SI research engine on a dynamometer. The measurements were made with a fast-response flame ionization detector with a heated sample line. The primary parameters that influence how rapidly a combustible mixture builds up in the cylinder are the inlet pressure and the amount of fuel injected; engine speed and fuel injection schedule have smaller effects. When a significant amount of liquid fuel is present at the intake port in the starting process, the first substantial firing cycle is often preceded by a cycle with abnormally high in-cylinder HC and low compression pressure. An energy balance analysis suggests that a large amount of liquid vaporization occurs within the cylinder in this cycle. Additionally, it was found that prevaporizing the fuel using a specially designed heated injector is effective for rapid starting and reduction of overfueling requirements during warm up

Notes:

Vendor supplied data

Publisher Number:

922170

Access Restriction:

Restricted for use by site license