Sensor architecture allows real-time auto emissions monitoring, Pt. 2

April 24, 2012 // By Ravindra Arora, Manmohan Rana, Sunil Deep Maheshwari, Freescale Semiconductor
As opposed to current periodic emission-control system testing—sensors, MCUs, and memory come together in an updated approach to real-time exhaust monitoring for improved pollution control.

Part 1 of this two-part series outlined the problem of auto emissions and the periodic "monitoring" of pollutants and vehicle systems for controlling them, via an annual inspection—as well as the proposed real-time monitoring system architecture.

Communication block
There might be many kinds of communication requirements, depending upon the final solution for the real-time emissions monitoring system. First is the interface between the information display MCU and the power train MCU. If one does not have single-chip support for display devices, as mentioned in Part 1, then one would also require a communication support between that display MCU and MCU under discussion.

The real-time solution also proposes to have a dynamic communication between the vehicle and any government pollution control and monitoring agency. To support this dynamic communication, one would also need to have a wireless communication support between the final solution and the central servers of an agency. This can be achieved using GPRS/CDMA/GSM mode of communication and therefore, support for this communication would also be required, either using the same chip by doing some architectural enhancements or using a separate chip interacting with the exhaust-monitoring MCU. All these requirements have to be kept in mind while designing the final product/solution to cater to the complete requirements.

To access the whole article which discusses in detail the aspects of sensing emissions, future challenges and scalability, click here

Courtesy of Automotive DesignLine


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