Combustion Model Based Explanation of the Pmax and IMEP Coupling Phenomenon in Diesel Engine Loughborough Univ

Format:

Conference/Event

Author/Creator:

Yang, Yang, author.

Contributor:

Steffen, Thomas

Stobart, Richard

Winward, Edward

Conference Name:

SAE 2014 World Congress & Exhibition (2014-04-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2014

Summary:

A three-pulse fuel injection mode has been studied by implementing two-input-two-output (2I2O) control of both peak combustion pressure (Pmax) and indicated mean effective pressure (IMEP). The engine test results show that at low engine speed, the first main injection duration and the second main injection duration are able to be used to control Pmax and IMEP respectively. This control is exercised within a limited but promising area of the engine map. However, at high engine speed, Pmax and IMEP are strongly coupled together and then can not be separately controlled by the two control variables: the first and the second main injection duration. A simple zero-dimensional (0D) combustion model together with correlation analysis method was used to find out why the coupling strength of Pmax and IMEP increases with engine speed increased.It was found that the closer coupling of Pmax and IMEP at higher engine speeds is due to the following reasons: (i) combustion occupied a larger crank angle; (ii) there was lower maximum heat release rate and (iii) there was a stronger correlation between IMEP and manifold air pressure (MAP) and promoted by the turbocharger

Notes:

Vendor supplied data

Publisher Number:

2014-01-1350

Access Restriction:

Restricted for use by site license