This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Vehicle Cold Start Mode Fuel Economy Simulation Model Making Methodology
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The air pollution and global warming has become a major problem to the society. To counter this worldwide emission norms have become more stringent in recent times and shall continue to get further stringent in the next decade. From OEMs perspective with increased complexity, it has become a necessity to use simulation methods along with model based systems approach to deal with system level complexities and reduce model development time and cost to deal with the various regulatory requirements and customer needs. The simulation models must have good correlation with the actual test results and at the same time should be less complex, fast, and integrable with other vehicle function modelling. As the vehicle fuel economy is declared in cold start condition, the fuel economy simulation model of vehicle in cold start condition is required.
The present paper describes a methodology to simulate the cold start fuel economy. The simulation methodology includes the engine heat balance equation, heat conduction through cylinder walls and heat convected by air. Based on the heat transferred and heat absorbed by the coolant, oil, block, the real time temperatures of engine oil, engine coolant and cylinder block are predicted. After the prediction of temperatures the engine friction as a function of oil and block temperature is predicted. The Idle speed is predicted as a function of coolant temperature and catalyst heating. The fuel consumption from hot start steady state condition will be corrected based the above (idle speed, engine friction) prediction. This methodology is used to simulate the cold start fuel economy.
|Technical Paper||Effect of Coolant Water and Intake Air Temperatures on Thermal Efficiency of Gasoline Engines|
|Technical Paper||Analysis of Common Rail Pressure Build-Up and Assistant-Establishment of Engine Phase Position in Starting Process|
CitationSingh, B., Mehra, P., and Gautam, A., "Vehicle Cold Start Mode Fuel Economy Simulation Model Making Methodology," SAE Technical Paper 2019-01-0898, 2019, https://doi.org/10.4271/2019-01-0898.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Unnamed Dataset 2|
|Unnamed Dataset 3|
|Unnamed Dataset 4|
|Unnamed Dataset 5|
|Unnamed Dataset 6|
|Unnamed Dataset 7|
|Unnamed Dataset 8|
- Trapy , J.D. and Damiral , P. An Investigation of Lubricating System Warm-Up for the Improvement of Cold Start Efficiency and Emissions of SI Automotive Engines SAE Technical Paper 902089 1990 10.4271/902089
- Roberts , A. , Brooks , R. , and Shipway , P.
- Dhand , A. , Cimen , T. , and Cho , B.