1 2014-08-26

Encapsulation of engine bay for active thermal control and lower noise emissions

Blago MinovskiSupervisor: Prof. Lennart LöfdahlDepartment of Applied MechanicsDivision of Vehicle Engineering and Autonomous Systems

Start: 09. 2013End: 09.2016Fordonsstrategisk Forskning och Innovation6842 kkr

Blago Minovski2 2014-10-09

Higher requirements for energy-efficient and quiet vehicles.

Demands for shorter lead times implicate the design process in a way that noise levels, coolant and cooling air flows, etc. must be decided already at concept stage.

Background

Blago Minovski3 2014-10-09

Engine encapsulation retains heat in the powertrain

Increases probability of high initial oil temperature at next engine start

Reduces air-bourne noise

Optimized engine cooling and vehicle thermal management by implementation of active means of temperature and flow control in the engine bay.

Concept

Blago Minovski4 2014-10-09

Aim

To develop a method and a software toolbox for evaluation of engine encapsulation effectiveness

– Cooling system temperatures for continuous drive cycles

– Hot spots (caused by radiation)

– Prediction of noise emissions

Blago Minovski5 2014-10-09

Current Status

Developed and validated a detailed 1-D model of the cooling system coupled with engine model that predicts important cooling system parameters with continuous signal input.

Blago Minovski6 2014-10-09

Current work

Implementation of three-dimentional tools to increase the accuracy of simulation and prediction

Blago Minovski7 2014-10-09

Future work

Extend the 1-D model to simulate the engine oil temperature variation after shutdown

Thermal models of encapsulation structures

Propose an engine encapsulation concept with active control and analyze it with the developed tool

Work out radiation and acoustic models and correlate simulation results to test results for the selected concept

Blago Minovski8 2014-10-09

Publications

"Study of Software Integration for Transient Simulation of Future Cooling System for Heavy Truck Application," SAE Technical Paper 2014-01-0653, 2014, doi:10.4271/2014-01-0653.

“An improved method for transient simulations of cooling systems with non-uniform thermal and flow boundaries” SAE Technical Paper