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Active roll control system offers better solution in improving the vehicle comfort and handling. There are various ways of active roll control system actuation like electrical, hydraulic and electro-hydraulic combination systems etc. For the current work, dual hydraulic actuator based active roll control mechanism is used. In this paper we have used integrated Model-In-Loop (MIL) based simulation approach to validate the active roll control system. Dual linear hydraulic actuators models and control logic for improving the roll dynamics of the vehicle is built using Matlab/Simulink. The desired car characteristics maneuver and road profiles are modeled in IPG Car maker(a Model in Loop based tool). Simulink model is integrated with Car Maker model for validating the performance in extreme cornering maneuvers, such as double steer step, slalom 18m, fishhook. For these dynamic maneuvers the roll angle vs lateral acceleration is monitored and effectively maintained to the desired values.

The structure of a vehicle is capable of absorbing a significant amount of heat when exposed to hot climate conditions. 50-70% of this heat penetrates through the glazing and raises both the internal cabin air temperature and the interior trim surface temperature. When driving away, the air conditioning system has to be capable of removing this heat in a timely manner, such that the occupant’s time to comfort will be achieved in an acceptable period [1]. When we reduce the amount of heat absorbed, the discomfort in the cabin can be reduced. A 1D/3D based integrated computational methodology is developed to evaluate the impact of vehicle orientation on cabin climate control system performance and human comfort in this paper. Additionally, effects of glazing material and blinds opening/closing are analyzed to access the occupant thermal comfort during initial and final time AC pull down test.

Joystick operated Hydraulic steering system offers numerous advantages in terms of controllability and operator comfort over the conventional steering systems. Consequently, there is also growing need to model these complex dynamic systems for evaluation and enhancement of performance. This paper is focused on modeling, simulation and analyzing the dynamic behavior of a joystick type hydraulic steering system of articulated machinery using commercially available Dynamic system modeling software. The simulation program is developed by modeling each component of joystick Steering system using various libraries exist in the dynamic system modeling tool. The complete vehicle was modeled as lumped mass, which will act on the tires and in turn acts as a load to the steering system. The simulation can be carried out for different type of steering operations of the machine and also for different load cases at different steering angles to predict the system performance characteristics.