TY - JOUR
T1 - Study of knock control in small gasoline engines by multi-dimensional simulation
AU - Nakama, Kenjiro
AU - Kusaka, Jin
AU - Daisho, Yasuhiro
N1 - Publisher Copyright:
Copyright © 2006 SAE International and Copyright © 2006 SAE Japan.
PY - 2006/11/13
Y1 - 2006/11/13
N2 - To suppress knock in small gasoline engines, the coolant flow of a single-cylinder engine was improved by using two methods: a multi-dimensional knock prediction method combining a Flamelet model with a simple chemical kinetics model, and a method for predicting combustion chamber wall temperature based on a thermal fluid calculation that coupled the engine coolant and the engine structure (engine head, cylinder block, and head gasket). Through these calculations as well as the measurement of wall temperatures and the analysis of combustion by experiments, the effects of wall temperature distribution and consequent unburnt gas temperature distribution on knock onset timing and location were examined. Furthermore, a study was made to develop a method for cooling the head side, which was more effective to suppress knock: the head gasket shape was modified to change the coolant flow and thereby improve the distribution of wall temperatures on the head side.
AB - To suppress knock in small gasoline engines, the coolant flow of a single-cylinder engine was improved by using two methods: a multi-dimensional knock prediction method combining a Flamelet model with a simple chemical kinetics model, and a method for predicting combustion chamber wall temperature based on a thermal fluid calculation that coupled the engine coolant and the engine structure (engine head, cylinder block, and head gasket). Through these calculations as well as the measurement of wall temperatures and the analysis of combustion by experiments, the effects of wall temperature distribution and consequent unburnt gas temperature distribution on knock onset timing and location were examined. Furthermore, a study was made to develop a method for cooling the head side, which was more effective to suppress knock: the head gasket shape was modified to change the coolant flow and thereby improve the distribution of wall temperatures on the head side.
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U2 - 10.4271/2006-32-0034
DO - 10.4271/2006-32-0034
M3 - Conference article
AN - SCOPUS:85072352892
SN - 0148-7191
JO - SAE Technical Papers
JF - SAE Technical Papers
T2 - SAE 2006 Small Engine Technology Conference and Exhibition, SETC 2006
Y2 - 13 November 2006 through 16 November 2006
ER -