Title: Thermodynamic model for homogeneous charge compression ignition combustion with recompression valve events and direct injection: Part II—Combustion model and evaluation against transient experiments

Abstract

This two-part article presents a combustion model for boosted and moderately stratified homogeneous charge compression ignition combustion for use in thermodynamic engine cycle simulations. The model consists of two parts: one an ignition model for the prediction of auto-ignition onset and the other an empirical combustion rate model. This article focuses on the development of the combustion model which is algebraic in form and is based on the key physical variables affecting the combustion process. The model is fit with experimental data collected from 290 discrete automotive homogeneous charge compression ignition operating conditions with moderate stratification resulting from both the direct injection and negative valve overlap valve events. Both the ignition model from part 1 and the combustion model from this article are implemented in GT-Power and validated against experimental homogeneous charge compression ignition data under steady-state and transient conditions. The ignition and combustion model are then exercised to identify the dominant variables affecting the homogeneous charge compression ignition and combustion processes. Sensitivity analysis reveals that ignition timing is primarily a function of the charge temperature, and that combustion duration is largely a function of ignition timing.

Authors:

Shingne, Prasad S. ^[1]; Sterniak, Jeff ^[2]; Assanis, Dennis N. ^[3]; Borgnakke, Claus ^[4]; Martz, Jason B. ^[4]

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+ Show Author Affiliations

1. Walter E. Lay Automotive Laboratory, University of Michigan, Ann Arbor, MI, USA, Ford Research and Innovation Center, Dearborn, MI, USA
2. Gasoline Systems Division, Robert Bosch LLC, Farmington Hills, MI, USA
3. Stony Brook University, Stony Brook, NY, USA
4. Walter E. Lay Automotive Laboratory, University of Michigan, Ann Arbor, MI, USA

Publication Date:

Fri Aug 26 00:00:00 EDT 2016

Sponsoring Org.:

USDOE

OSTI Identifier:

1437691

Grant/Contract Number:  

EE0003533

Resource Type:

Published Article

Journal Name:

International Journal of Engine Research

Additional Journal Information:

Journal Name: International Journal of Engine Research Journal Volume: 18 Journal Issue: 7; Journal ID: ISSN 1468-0874

Publisher:

SAGE Publications

Country of Publication:

United Kingdom

Language:

English