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This paper deals with the Real Time Simulator concerned with entire physical values applied to the automatic climate control for the vehicle, the automatic climate controller and the temperature variation of cabin inside. The control performance is under the characteristics of HVAC system, cabin structure, thermal loads from cabin outside and control algorithm. However, one of the biggest problem with automatic climate control is that it requires a heavy cost and much time for the experimental verification. Moreover, CFD cannot afford to analyze all these values perfectly. For this reason, we solved this problem through the simplified mathematical model and the equations which are evaluated from experimental background. The main objective of this study is to develop a simulator which can replace actual vehicle test on automatic climate control thoroughly.

This paper is consists of two parts, which describe the development procedure of climate control algorithm for a passenger car. The first part deals with the control algorithm design, and the second part introduces control performance test. Control algorithm is evaluated through thermal balance equation of vehicle compartment. The procedure of this evaluation is verified by showing test result. In vehicle test, the remote controller, a real-time experimental system for climate control, is used. The software of remote controller is programmed by Visual C++ operating on WIN95 and the hardware is similar to a real electronic control unit of HVAC. Remote controller predicts control efficiency of HVAC system. The goal of this paper is to get the standard model of development procedure. It would contribute cost reduction and rapid development of climate control algorithm for a passenger car.

This model is developed based on the concept of Hiroyasu's multizone combustion model. It takes nozzle injection (spray) parameters, induction swirl, air and fuel composition into consideration. The models of zone velocity, air entrainment rate, fuel droplet evaporation rate, mixture combustion rate are upgraded according to the latest papers. Various parameters, such as cylinder pressure, heat release rate, NOx and soot emissions, etc. are simulated. The simulated zone velocity and spray tip penetration are compared with those computed by Hiroyasu. The simulation results show good agreement with the experimental data.