Millbrook's Variable Temperature Emissions Chamber (VTEC) is a climatic chassis dyno vehicle emissions testing facility designed for light and heavy duty vehicles.
The facility is designed for highly repeatable emissions, fuel economy and energy consumption to enable the development and approval of vehicles fuel/lubricants and components to a wide variety of industry standards. Although primarily designed for emissions testing for both light and heavy duty vehicles, the facility can also undertake test activities which require a controlled environmental condition or drive cycle.
Emission Test Capabilites
Non-Emission Test Capabilities
In the UK, Millbrook offers two facilities ideally suited for a variety of vehicle and emissions tests on light and heavy duty vehicles - a Variable Temperature Emissions Chamber (VTEC) and a Heavy Duty Dynamometer Test Chamber (HDDTC).
The table below offers a detailed comparison of the two chambers and their applications.
|VTEC (Variable Temperature Emissions Chamber)||HDDTC (Heavy Duty Dynamometer Test Chamber)|
|Type||2WD single axle||Double axle fixed separation (1,350mm)|
|Max Power||200kW above 118km/h||495kW above 50km/h|
|Cooling Fan||Twin large speed tracking fans||Fixed speed vehcle cooling fan|
|Drive Cycle Simulation||Yes||Yes|
|Temperature Range||Controlled -30°C to +50°C||No control. External ambient air circulation|
|Temperatue Control||+/-2°C Limitations below -20°C with high heat load||No control|
|Bag CVS||Yes (HC, CO, NOx, CO2)||No|
|Raw Gas Sample||2 Streams (HC, CO, NOx, NO, NO2 CO2)||1 Stream (HC, CO, NOx, CO2) - concentration only|
|Particle Mass||Yes 3 phase||No|
|Particle Number||Yes - Regulated and ELPI||No|
|Fuel Consumption||Regulatory Carbon Balance||High-accuracy and fast-response fuel measurement equipment|
|Other emissions||FTIR - NO, NO2, N2O, Ammonia, Formaldehyde||None|
|Size (L x W x H)||26m x 6m x 5m||19m x 9m x 5m|
|Background Noise Level||N/A||40db linear|
|Lower Cutoff Frequency||N/A||70Hz|
|Approval Testing||Yes - TfL, LEB, LUB, CVRAZ||No|
|Shake Down Testing||Yes||No|
|Fuel Economy Comparison||Yes||Yes|
|Constant High Power Testing - Fuels Work||No||Yes|
|Brake Tests||No||Type IIA endurance brake tests on M3, N3 and ADR (N2 and N3) vehicles in accordance with ECE R13|
|Vehicle Cooling Trials||Limited on Power||Yes at uncontrolled ambient temperature|
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