MEDASMULTI FUNCTION EFFICIENT DYNAMIC ALTITUDE SIMULATION

ACCURATE – DYNAMIC – EFFICIENTAltitude simulation for R&D

The topic of Real Driving Emissions (RDE) is becoming more and more impor tant. Accurate testing is essential to ensure internal combustion engines meet global emission and modern performance standards under various altitudes during real driving conditions. Until now, altitude chambers have been used for this testing, but cost, flexibility, accuracy, and energy consumption have always been a concern. 

A unique tool, the MEDAS altitude simulator, has been designed specifically to address these concerns. This mobile solution meets all of today’s and future market demands. It is extremely dynamic, highly accurate, and offers simulation options for Road-to-Rig and test cell level verification for RDE-related topics. By implementing new statutory requirements into the development process, the process can be drastically shortened, leading to time-savings. MEDAS can be utilized for engine intake and exhaust pressure, as well as temperature conditioning for engine and power train cells. It is also useful for chassis dynamometer applications covering steady state and dynamic engine operation conditions.

HORIBA OFFERS THREE MAIN VERSIONS OF MEDAS MEDAS technical data

Model MEDAS-5012 VO MEDAS-5009 V MEDAS-5012 V

OperationVacuum and Overpressure

Vacuum Vacuum

Altitude simulation height Up to 5,000 m Up to 5,000 m Up to 5,000 m

Overpressure mode More than 2,000 m No No

Mass flow Up to 1,200 kg/h Up to 900 kg/h Up to 1,200 kg/h

Dimensions (H x W x L) 1,600 x 1,150 x 2,816 mm 1,600 x 1,150 x 2,040 mm 1,600 x 1,150 x 2,816 mm

Weight Approx. 1,800 kg Approx. 1,300 kg Approx. 1,800 kg

Power 45 kW 45 kW 45 kW

MEDAS IS AN IDEAL SIMULATION TOOL FOR Global day-to-day correlation over different R&D locations Engine optimization & mapping Reduction of fuel consumption Performance improvement Emission optimization with focus on RDE

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STAY UP-TO-DATE ON SIMULATION Get control of your parameters

Stay up-to-date on RDE, Rig-to-Rig and Road-to-Rig correlation as well as validation / verifi cation / fuel  effi  ciency. MEDAS has been developed using effi  cient energy consumption technology, which is powered via electric motor driven chargers and compressors. They work with ultra-high-speed components to  generate the required intake air and exhaust conditions to the engine in time with highest accuracy. This eliminates the need for huge media storage buff er as has been required in the past. 

Due to this technical approach MEDAS is ahead of traditional equipment and achieves a high level of energy effi  ciency based on its function principle. The tubing of electrical motor with ultra-high-speed charger  components,  waste gate and fl aps is controlled via MEDAS processor which allows alternate vacuum and pressurized operation. 

MEDAS is your aff ordable engine conditioning system that covers real altitude conditions.

CONTROL INTAKE AIR AND EXHAUST PRESSURE

SIMULATE NATURE DRIVEN TEMPERATURE EFFECTS BY VACUUM / PRESSURE CAPABILITY

In the application fi eld of combustion related engine mapping, internal parameters like intake air and exhaust pressure are  signifi cantly impor tant for fuel economy and emission reduction, as well as engine performance.

Eff ective for uphill and downhill simulation, MEDAS is an essential tool for global R&D and day-to-day correlation tasks on diff erent altitude levels in respect of altitude correlating temperatures as well.

TROOM TWATER

-20

-40

8,000 7,000 6,000 5,000 4,000

ALTITUDE (m)

3,000 2,000 1,000 0

∆T

(˚C)

∆T

(˚C)

PRESSURE (bar)

0.36 0.41 0.47 0.54 0.62 0.70 0.79 0.90 1.01

100100

50

∆T = -22 ˚C 5,000 m

2,000 m

Vacuum mode

ISA

Overpressure mode

∆T = -10 ˚C

Temperature control range in dependence of simulated altitude, for vacuum and overpressure operation modes.MEDAS MTM covers the full temperature range (see page 5 and 6).

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FLEXIBLE FOR STEADY STATE AND DYNAMIC APPLICATION

If you are dealing with RDE development targets, MEDAS off ers you simulation of altitude or ambient  conditions under desired temperature, humidity and pressure. Correlation of pressure and mass fl ow at engine intake and exhaust ensures exact conditions at your engine under test.

MEDAS operation range as a function of altitude and mass fl ow. Functional extensions can compensate for non-covered area (see page 5 and 6).

EASY TO OPERATEYou can operate MEDAS via standard interface automation or by using the interactive touch screen to select on-demand values and simulation monitoring as a standalone unit as well.

1,500

2,000

1,000

500

0

8,000 7,000 6,000 5,000 4,000

ALTITUDE (m)

3,000 2,000 1,000 0

MAS

S FL

OW (

kg/h

)

PRESSURE (bar)

0.36 0.41 0.47 0.54 0.62 0.70 0.79 0.90 1.01

520 KG /H (5009 V)

720 KG /H (5012 VO)

900 KG /H (5009 V)

1,200 KG /H (5012 VO)non-covered area for MEDAS-5012

non-covered area for MEDAS-5009

MEDAS-5012 VO in overpressure modeMEDAS-5012 VO in vacuum modeMEDAS-5009 V in vacuum mode

5,000 m

2,000 m

4

New legislation requires automotive manufacturers to test their vehicles at defi ned and varying altitudes to refl ect actual driving conditions. Two additional options are available to ensure compliance with the new standards: the MEDAS Temperature Module (MTM) and the MEDAS Humidity Module (MHM). These additional modules allow tests to be carried out in a temperature range of -15 to 40 °C at altitudes up to 5,000 meters above sea level and respective humidity from 10 to 80 % as a standard.

The functional extensions enable simulations within a wider range of ambient pressure, temperature and humidity at the engine intake and exhaust, which means that various tests (such as performance, emission or durability testing) can be carried out on an engine operating in any ambient condition and in any test cell.

MEDAS FUNCTIONAL EXTENSIONS Simulating Realistic Altitude Profi les

Model Mass fl ow (kg / h)

Pressure Temperature HumidityVacuum Overpressure Cooling Heating Drying Humidifying

MEDAS-5009 V 900 Limited

MEDAS-5012 V 1,200 Limited

MEDAS-5012 V0 1,200 Limited Limited

MEDAS + MTM 900 / 1,200 Limited

MEDAS + MTM + MHM 900 / 1,200

FEATURES Ability to perform any RDE test on the chassis dynamometer Measurements up to 5,000 m Global correlation of measurement results Simulated temperature range of -15 to 40 °C Simulated humidity range of 10 to 80 %

Compact MEDAS cabinet for fl exible test cell integration

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MEDAS TEMPERATURE MODULE

The MEDAS Temperature Module (MTM) is a complementary option for the MEDAS altitude simulator. The MTM  extends the temperature range available for altitude testing. This makes it possible to simulate any temperature between -15 and 40 °C, at altitudes ranging from sea level to 5,000 m above sea level independently of the location and also under dynamic operation.

MEDAS HUMIDITY MODULE

THE MEDAS Humidity Module (MHM) is an extension module for humidity control that operates in connection with MEDAS and the MTM. The MHM allows engine intake humidity to be controlled within the range of 10 to 80 % at any given altitude and temperature.

Easy set-up of MEDAS with MTM and MHM

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BENEFITSA wide simulation range and extreme flexibility

SIMULATE POSITIVE & NEGATIVE PRESSURE One system for positive & negative pressure Steady state and dynamic testing Simulates a run from sea-level up to

5,000 meters in few seconds Simulate exact conditions on engine

intake and exhaust

HIGH ACCURACY AND PERFORMANCE Capable to follow dynamic transient

cycle and corresponding engine dynamics Accuracy: better than +/- 10 meters Real driving behavior due to high-speed

process components High repeatability

MOBILE SYSTEM MEDAS is designed for flexible usage Can be shared among test cells expandable

by additional components for humidity and temperature conditioning

Highly flexible interfacing via standards

EFFICIENT Best efficiency due to ultra-high-speed operation High energy efficiency Simple adaptation and standard HMI enables

easy operation

RELIABLE Spare parts are globally available Easy maintenance Simple engine integrity

BENEFITS OF TEMPERATURE AND HUMIDITY MODULES Dynamic and steady state simulation of different

altitude, temperature and humidity profiles Easy integration into existing MEDAS and any test cell Improved measurement accuracy and repeatability

allow for global day-to-day correlation in different test centers and under different environmental conditions around the world

Increased efficiency due to free cooling power obtained in the gas expansion over the VGT

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THE HORIBAGLOBAL NETWORK

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(1) HORIBA continues contributing to the preservation of the global environment through analysis and measuring technology. (2) The contents of this brochure are subject to change without prior notice, and without any subsequent liability to this company. It is strictly forbidden to copy the content of this brochure in part or in full. All brand names, product names and service names in this brochure are trademarks or registered trademarks of their respective companies. (3) HORIBA Automotive Test Systems MEDAS 2018-05 WWW.HORIBA.COM

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