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The electronic content in an automobile is ever increasing for last several years due to emissions, safety and performance requirements. The complete development cycle of an electronic controller needs to be compressed to introduce new vehicle models in the market ahead of time. Antilock Braking System (ABS) ECU is one such example which has become a standard feature for most of the vehicles due to safety considerations. A project was undertaken to develop ABS ECU strategy from concept to vehicle trials with Model Based Development (MBD) technique. A methodology is established for scalable, fault tolerant, proven, and quick to implement ECU strategy development. This paper presents the development cycle followed for a unique ABS controller.

Electronics is widely used for improving the vehicle safety due to its characteristics like fast response, multi sensor interface and implementation of complex control strategy. Already a majority of vehicles are fitted with some kind of Electronic Stability Program (ESP) system in many countries to improve safety performance. Yaw stability is one of the major elements under ESP system. A project was undertaken to develop Yaw Stability Control (YSC) strategy. YSC strategy development is very challenging due to several issues like dynamics of event, ability of brake hydraulics and /or Engine torque controller to respond, proving of the strategy under different user scenarios etc. This paper describes the challenges faced and solutions tried out while development. The paper presents the YSC controller strategy, different regulatory requirements, test data and results with and without YSC on a typical SUV vehicle. The controller has been developed using Matlab Simulink environment.