An Analysis on Cycle-by-cycle Variation and Trace-knock using a Turbulent Combustion Model Considering a Flame Propagation Mechanism Mitsubishi Motors Corporation

Format:

Book

Conference/Event

Author/Creator:

Kitada, Taizo, author.

Contributor:

Hayashi, Shinji

Kitagawa, Toshiaki

Kuchita, Masato

Nagano, Yukihide

Sakai, Yasuyuki

Shirota, Takayuki

Tanaka, Dai

Conference Name:

2019 JSAE/SAE Powertrains, Fuels and Lubricants (2019-08-26 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2019

Summary:

Gasoline engines have the trace-knock phenomena induced by the fast combustion which happens a few times during 100 cycles. And that constrains the thermal efficiency improvement due to limiting the ignition timing advance. So the authors have been dedicating a trace-knock simulation so that we could obtain any pieces of information associated with trace-knock characteristics. This simulation consists of a turbulent combustion model, a cycle-by-cycle variation model and a chemical calculation subprogram. In the combustion model, a combustion zone is considered in order to obtain proper turbulent combustion speed through wide range of engine speed. From a cycle-by-cycle variation analysis of an actual gasoline engine, some trace-knock features were detected, and they were involved in the cycle-by-cycle variation model. And a reduced elementary reaction model of gasoline PRF (primary reference fuel) was customized to the knocking prediction, and it was used in the chemical calculation. Through the trace-knock simulation, some advantages of the cycle-by-cycle variation model and the chemical reaction calculation became obvious. In this paper, the details of these calculation methods are described, and the advantages of this calculation are discussed

Notes:

Vendor supplied data

Publisher Number:

2019-01-2207

Access Restriction:

Restricted for use by site license