SAE 2014 On-Board Diagnostics Symposium - Europe

Technical Session Schedule

Tuesday, March 4

2014 On-Board Diagnostics Symposium - Europe - Day 2
(Session Code: OBDE200)

Room Saal Maritim  ALL DAY

Time Paper No. Title
9:00 a.m. ORAL ONLY
SAE Communications Standards
Paul A. Baltusis, Ford Motor Co.; Robert Gruszczynski, Volkswagen of America
10:00 a.m. ORAL ONLY
Jaguar Land Rover Experiences
The presentation covers some of Jaguar Land Rover’s lessons learnt from certifying to ARB’s OBD II regulation over nearly 20 years. Three topics will be discussed, communication with ARB staff, our introduction of a novel catalyst light-off strategy, which required the ABS control module to become OBD compliant and how JLR collects IUMPR data from small populations of vehicles.
Martin Haggett, Jaguar Land Rover
10:30 a.m.
11:15 a.m. ORAL ONLY
Breakout Sessions
The Organizers of the Symposium will facilitate four breakout sessions on the following topics:

1. Communication Standards, moderated by Paul Baltusis

2. Diesel Aftertreatment, moderated by Hal Zatorski

3. Hybrid / OBD, moderated by Andrew Zettel

4. Diesel Misfire Monitoring, moderated by John Van Gilder
1:00 p.m. ORAL ONLY
Networking Lunch with Exhibits
2:00 p.m. ORAL ONLY
Break Out Session Q&A
Bernard Challen, Shoreham Services
3:00 p.m. ORAL ONLY
BAE Systems Hybrid
Derek Matthews, BAE Systems
3:30 p.m. ORAL ONLY
Kinetic Model Based SCR Management to Minimize Base Control Complexity and Maximize OBD Opportunity
For decades, urea based Selective Catalytic Reaction (SCR) has been a prominent aftertreatment methodology for NOx reduction. Although SCR application was predominant in industrial and research areas, the dominant leap in urea distribution and availability paved the way for SCR systems to be used for on-highway applications. Today, the majority of NOx aftertreatment uses SCR. Engineering advancements in urea delivery, hydrolysis, mixing, NH3 distribution, deposits and NH3 slip control, make it a viable solution for future automotive applications. However, recent OBD implementations on SCR systems have unveiled fundamental challenges. One such fundamental challenge is that the SCR system performance management has no direct feedback to measure and control. The lack of feedback requires interesting and complex control logic to determine that urea being dosed meets known NH3 demand and NH3 storage on the SCR catalyst drives the NOx conversion efficiency; efficiency is measured by means of NOx decrease. However, consideration must be given due to the NOx sensor sensitivity to NH3 when used for feedback. In this context, SCR performance monitoring is certainly a challenging task.

An over-engineered smart diagnostic strategy alone cannot resolve this interference; also supportive intelligent SCR system control is most important to avoid poor in-use diagnostics. Such a synergistic method will be discussed in the presentation where an SCR kinetic model is used within the ECU control logic for SCR management, where the effects of urea dosing can be made and corrected prior to actual dosing. Besides conservative and cautious dosing management, the strategy offers extended information on the current state of SCR which will be harnessed for aggressive efficiency management while minimizing the number of sensors required. This strategy while offering robust support for performance control, greatly benefits OBD through supplying virtual sensing of NH3 storage, NH3 slip rate and intelligent intrusive test possibilities, which can be used for smart and robust diagnostics of SCR system performance. The presentation also discusses how kinetic model based OBD will minimize the number of calibration labels, and thus reduce the overall calibration effort, while proving the concept can be easily adaptable for applications from passenger car to heavy-duty with minimum changes.
Duncan Engeham, FEV GmbH
4:00 p.m. ORAL ONLY
Evaluation Techniques of NOx for OBD II Compliance on Fuel Injection System Monitoring in a Common Rail Vehicle Diesel Engine
As commercial vehicles are constantly getting cleaner, their contribution to air pollution is in large part defined by the in-use emissions degradation. In this respect, malfunctions in emissions-related components may play an important role to the contribution of commercial vehicles in air pollution.

This paper will evaluate the effect of NOx at different diagnostic fault conditions experimentally tested on a common rail automotive 6 cylinder diesel engine in order to evaluate their capabilities to fulfill the Indian OBD II requirements concerning the monitoring of CRS FIE systems.

First, an investigation of sensitivity of NOx emissions to fuel injection quantity, timing, boost, coolant temp, injector and rail pressure variations were carried out at different engine operating points as per steady state cycles to evaluate the OBD thresholds conditions. Afterwards, the different diagnostic algorithms under investigation based on the above were tested under OBD operating conditions in order to detect their fault detection capabilities.
Leelakumar Murugesan, Ashokleyland
4:30 p.m.
5:00 p.m. ORAL ONLY
Granularity of Monitors/PinPointing: How Many Failure Modes Shall an OBD Monitor Be Able To Distinguish?
How many failure modes shall an OBD monitor be able to distinguish? OBD has been a key challenge in the engine control system business for many years. Within these years the OEMs, suppliers, authorities have achieved a shared understanding of the needs as well as the technical feasibilities. Reading the legislation text without this grown experience is not always so easy.
Carsten Bruns, Continental Automotive GmbH
5:30 p.m. ORAL ONLY
NEW CHALLENGE: Motorcycles must be safer and cleaner!
What would happen if motorcycles had similar emissions and OBD legal requirements to passenger cars?

The aim of the presentation is to give an overview of the current and future European On Boad Diagnostic and emission legislation requirements for two- and three wheeled vehicles, based on the new Regulations which are implemented by the European Union with the beginning of 2016. The speech also covers experiences Bosch Engineering GmbH made in this sector and an estimation of upcoming changes in that field.
Klaus Fronius, Bosch Engineering GmbH