Abstract
This paper discusses the fact that vehicle and powertrain test methods have long been guided by type approval requirements – with a focus ot the recent/current example of real driving emissions (RDE) and in-service conformity (ISC) test requirements. The implcations current and future – of these testing requirement, which force the use of portable emissions measurement system (PEMS) are discussed. In this context, BOSMAL Automotive Research and Development Institute’s PEMS systems are presented, and the systems’ attributes and versatility are explored. Considerations for testing a very wide range of vehicle, engine and fuel types are mentioned. Non-legislative applications of PEMS systems are briefly explored; finally, it is shown that the emissions laboratory and its chassis dyno remain indispensable when conducting work on light duty exhaust emissions, even in the era of RDE.
Highlights
This paper discusses the fact that vehicle and powertrain test methods have long been guided by type approval requirements – with a focus ot the recent/current example of real driving emissions (RDE) and in-service conformity (ISC) test requirements
A well-defined and universally-known speed trace was followed by the vehicle and diluted exhaust emissions were measured, with a relatively simple calculation process determining the final results in terms of mass-per-distance
While the speed trace of the WLTP attempted to capture the complexity and variability of realworld driving, the speed trace for a given vehicle was the same for every test and defined in advance. The use of such test procedures created strong pressure for manufacturers to produce vehicles, engines and engine calibrations which performed well under test conditions – that is to say, the laboratory conditions known to be the official procedure at the time could be targeted in terms of optimization of exhaust emissions and limiting fuel consumption
Summary
This paper discusses the fact that vehicle and powertrain test methods have long been guided by type approval requirements – with a focus ot the recent/current example of real driving emissions (RDE) and in-service conformity (ISC) test requirements.
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