Real Driving Emissions and PEMS Testing

At a glance

Millbrook provides accurate and repeatable Real Driving Emissions (RDE) test data for a variety of vehicles and non-road mobile machinery (NRMM) emissions tested on public roads and wide-ranging track facilities.

Jump to PEMS testing equipment

Real Driving Emissions (RDE) test facility at Millbrook with car, truck and van fitted with PEMS equipment
Bus emissions test cycle on a London bus fitted with PEMS test equipment, collecting real driving emissions test data

In the UK, Millbrook uses its Portable Emissions Measurement Systems (PEMS) for product development, certification and accreditation tests for programs such as the HGV accreditation scheme and Clean Vehicle Retrofit Accreditation Scheme (CVRAS).

Bus fitted with PEMS test equipment driving on public road as part of a bus emissions test cycle

Real Driving Emissions (RDE) Testing

To complement laboratory WLTC testing, the latest emissions regulations use RDE testing to assess a vehicle’s performance against emission standards, over a wide variety of boundary conditions, and to help detect the presence of prohibited so-called 'cheat devices'.

Millbrook has developed multiple RDE-compliant, boundary challenging PEMS test routes on public roads and on its safe and secure test tracks, and uses real-time data processing to assess trip validity during test, ensuring maximum efficiency.

The individual RDE test parameters can be applied to Millbrook’s chassis dynamometers in the UK to run highly repeatable RDE simulations across variable ambient temperature range, between -20°C and 50°C.

In-Service Compliance (ISC) PEMS Testing

Using its PEMS hardware and data processing software, Millbrook is able to provide heavy-duty vehicle  ISC testing in accordance with the latest European regulations EU 582/2011 (2019/1939) otherwise known as “Stage E”.

Non-Road Mobile Machinery (NRMM) PEMS Testing

For in-service compliance testing of non-road mobile machinery, Millbrook has developed its own data processing tool. It can perform both regulatory and non-regulatory PEMS tests on non-road mobile machinery and any associated retrofit / after-treatment technology.

Millbrook’s expert team can source the appropriate vehicle for the customer. They perform both on-road and chassis dynamometer tests, quickly and efficiently, generating the data required to identify solutions for product development.

Non-Regulatory Testing

As well as performing RDE tests against the latest vehicle emissions regulations, Millbrook’s PEMS test equipment is used for calibration development and validation, vehicle air quality evaluations, research and product benchmarking using procedures such as the LowCVP HGV and CVRAS accreditation schemes. Millbrook’s technical experts are well versed in developing bespoke procedures to satisfy the unique requirements of customers across a variety of industries.

Private track hire UK at Millbrook's test track

Millbrook offers multiple RDE-compliant PEMS test routes

Car being prepared for an RDE test by PEMS emissions test engineers

Millbrook has a large, purpose-built workshop to support PEMS testing in the UK, situated next door to its chassis dynamometer laboratories

Non-road mobile machinery directive emissions and fuel consumption test procedure

Millbrook performs both regulatory and non-regulatory PEMS tests on non-road mobile machinery and any associated retrofit / after-treatment technology

Vehicle environmental testing in a large climatic chamber at Millbrook Proving Ground

RDE test programmes use a wide range of facilities, including Millbrook’s private test tracks, emissions chassis dynamometers and climatic chambers

PEMS Test Equipment and Facilities

Millbrook currently uses equipment with the following measurement capability:

  • Measuring/Data output frequency: 5Hz / 1Hz
  • CO, CO2, NO, NO2, NOx, HC, CH4 and PN
  • Exhaust flow rates up to 3115kg/hr
  • Vehicle CAN

PEMS test equipment is regularly correlated against laboratory analyzers to ensure compliance with regulatory requirements, accuracy and repeatability of emissions measurements.

It supports testing of public service, heavy-goods and light-commercial vehicles, non-road mobile machinery and passenger cars. Millbrook can replicate individual customer RDE test programs using a wide range of facilities, including its private test tracks, emissions chassis dynamometers and climatic chambers, which allow simulation of cold-start events for the purpose of RDE development.

Millbrook’s RDE test data processing tools have been developed in-house, independently of any particular PEMS manufacturers. This ensures freedom of data input and allows Millbrook to meet unique customer requirements during Research and Development (R&D) test programs.

Millbrook has a large, purpose-built workshop to support PEMS testing, situated next door to its chassis dynamometer laboratories, to offer greater flexibility for preparation of vehicles and execution of RDE test programs.

PEMS Testing Approvals

Millbrook has facility approval from the VCA for RDE testing to RDE "Package 4". The approval covers light duty vehicle testing to EU 2017/1154 (2018/1832) and Millbrook’s RDE data processing software.