Light Duty Vehicle Real Driving Emissions

Type approval for LDVs with combustion engines has never been more challenging. In Europe, emissions limits for light passenger and light commercial vehicles are stricter than ever and there is an on-going drive to reduce LDV CO2 emissions plus new/stricter test procedures came into force in 2017. Regarding this last point, type approval requires new car models be subjected to improved laboratory tests - under the EU version of the World Harmonised Light Vehicle Test Procedure (EU-WLTP) – as well on-road Real Driving Emissions (RDE) tests requiring the use of Portable Emissions Measurement Systems (PEMS).

Further regulation changes, and therefore challenges, are on the way. Are you ready?

In Europe, the EU is committed to the protection of air quality and the reduction of greenhouse gas emissions. The EURO emissions standards were introduced (EURO 1) in 1993, though rules covering air pollution from motor vehicles date back to the 1970s.

Amendments and revisions over the years have introduced progressively stricter limits and tougher tests and the current standard, EURO 6 D, allows for few discrepancies between labs results and exhaust gas emissions levels established on the road.

The pollutants measured as part of type approval under EURO 6 D are: carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx), particulate matter (PM) and the number of particles (PN). The limits differ depending on the type of combustion.

Whilst it is not known exactly is what will follow EURO 6 D - be it EURO 7 or an intermediary step (E), it is most likely that:

  • Particles counting (PN) size will reduce to 10nm
  • Gases measured could include ammonia (NH3) and nitrogen dioxide (NO2, as a standalone component in addition to NOx)

 

Help is at hand, for more information on HORIBA's solutions.

Working closely with regulatory authorities, and active on many working groups, HORIBA has a comprehensive understanding of how the legislation is changing for RDE and in the laboratory.

HORIBA have been active in the combustion engine emissions measurement and analysis industry since the 1960s and have grouped together a selection of solutions that can help you capture the data you need to make informed decisions during your R&D work, that will save you time and money through fewer prototypes, for example, and reduce your project risks.

Imagine having the world leader in emissions measurement by your side during these challenging times.

Our Measurement & Analysis Solutions Include:

OBS-ONE

A versatile PEMS for engine monitoring under real world operating conditions. The OBS-ONE measures concentrations of emissions (CO, CO2, THC, NOx, NO2), PN, PM, air-to-fuel ratio, exhaust flow rate, GPS data, environmental conditions (atmospheric temperature, humidity and pressure) and calculates mass emissions.

These include:

  • Accuracy. The OBS-ONE provides accurate data to enable you to make informed decisions
  • Low power consumption. This means the OBS-ONE can be used over extended periods on battery power.
  • Stability. An uninterruptable power supply (UPS) protects against data loss during power source switch-over or power loss.
  • Thoroughness. Comprehensive. test packages include self-diagnosis, quality checks and sensitivity calibrations before testing.
  • Safety. An emergency STOP button cuts of power and gas supply.
  • Familiarity. The OBS-ONE shares much of the same software as the MEXA-ONE, CVS-ONE and other HORIBA test cell equipment.

 

A Rugged Enclosure (RE) is available.

This product is RDE+ Compatible
HORIBA’s RDE+ is an all-encompassing solution that comprises proven, robust and integrated processes and tools to support your design, development, validation and verification activities

EXFM-ONE

EXFM-ONE employs an ultrasonic method for measuring exhaust gas flow rates directly from a vehicle or engine. The unit can be used for various applications such as real time mass measurement of raw exhaust gas.
 
 

These include:

  • Versatility. A large dynamic range allows the EXFM to cover a broad range of engine sizes without making changes to the test cell setup
  • Time-savings. An optional AFR/ Lambda sensor allows additional measurements to take place.
  • Non-intrusive. The EXFM does not use a probe to measure exhaust gas flow rate, so there is nothing to restrict the gas stream. This way there is a maximum of 1kPA back pressure during testing of the engine.

PTFM-1000V2

The Pitot Tube Flow Meter, PTFM-1000V2 is a standalone device for measuring the exhaust gas flow rate of a combustion engine. The system uses the tried-and-tested pitot tube principle with high-frequency transducers that ensures pulsations are not missed.
 

These include:

  • Versatility. The interface can be run standalone with a laptop or integrated to run alongside an analyser system without adding any more steps to the test cycle process.
  • Automation. Flow tube types (Eight are available) are detected automatically plus the unit has automated zero and purge sequences.
  • Engine operation uncompromised. Fuel or air flow measurements are not required.

 

This product is RDE+ Compatible
HORIBA’s RDE+ is an all-encompassing solution that comprises proven, robust and integrated processes and tools to support your design, development, validation and verification activities

PTFM-ONE DT

The standalone Dual Pitot Tube Flow Meter, PTFM-ONE DT is used for the measurement of engine exhaust gas flow rates for engine and chassis dyno tests. It consists of a tailpipe attached with two pitot tubes and an interface, all housed in a single chassis.
 

These include:

  • Automation. The gas flow is automatically directed to which of the two tubes will make best use of the unit’s signal conditioning electronics; i.e. highest possible accuracy at all times.
  • Wide Dynamic Range. This is thanks to the two Pitot tubes.
  • Low Back Pressure. The use of two tubes ensures that exhaust back pressure remains low at the higher flow rates
  • Better resolution. The high-speed sampling of the pressure changes in the tailpipe allow for the visualisation of brief spikes and negative pulses that would otherwise be missed, giving you a better picture of what is really going on in the tailpipe.

 

This product is RDE+ Compatible
HORIBA’s RDE+ is an all-encompassing solution that comprises proven, robust and integrated processes and tools to support your design, development, validation and verification activities

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