MDLT-ONE

Micro Dilution Tunnel

The MDLT-ONE is designed to sample particulate emissions using the partial flow dilution method. A small portion of the total exhaust is diluted with HEPA* filtered air to create a constant flow rate through particulate filters to collect Particulate Matter (PM). Compliant to the latest regulations, the new MDLT-ONE is very compact and offers faster response by the use of high precision venturi flow meters and a piezo actuated valve.

*HEPA: High Efficiency Particulate Air

Segment: Automotive

Division: Emission Measurement Systems

Manufacturing Company: HORIBA, Ltd.

Small footprint

Heated filter system and flow controllers installed in a single rack. Swivel connection of tunnel section to cabinet allows flexible installation.

Flow weighting (EPA-approved technology)

Allows user to collect PM on a single filter over all three phases of FTP by adjusting sampling flow rate over the filter to weight the filter face velocity over the three phase of the FTP based on weighting targets. This EPA-approved technology increases the measurement accuracy for meeting the upcoming CARB LEV III 1`mg/mile emission limit and reduces filter weighing cycles from three to one, eliminating manual checks and calculations.

Automatic filter changer

Increases testing efficiency, allowing a maximum of 28 tests to be run without manual intervention. This feature can be mounted in the main rack to keep equipment footprint small.

Automatic calibration software enhances accuracy and ease of use

The MDLT-ONE series performs automatic calibration by flowing air in-series through two venturi flow meters and correcting any difference to zero in the software. This can be included in an automated sequence within a test template.

Integrated Operating Platform

HORIBA ONE series systems employ a common use interface, “HORIBA ONE PLATFORM” offering future expandability and ease of integration into test automation systems.

Applications

PM Emission Measurement of All Engines

R&D Support of Engine and After Treatment System

Complies with worldwide emissions regulations

ISO-16183	EU: Euro VI (HDV)	US: 40 CFR Part 1065/1066
Japan: Post new long term	EU: Stage IV / V (NRMM)

System outline
PM sampling method		Partial flow dilution method
Control modes for dilution		Proportional sampling mode (Const. split ratio)/ Fixed dilution ratio mode (Const. dilution ratio)/ Fixed flow rate mode (Manual control)
Control methods for dilution		・Real-time control based on analog input of exhaust flow rate ・Control based on learned pattern of exhaust rate
Required signal for gas sampling		Isolated analog signal (0 to 10 V)
Flow rate of diluted gas		25 to 80 L/min^*1 (under the condition of 20 °C and 101.3 kPa)
Accuracy of dilution ratio		Within ± 5 % (excluding the system with AFIC) When dilution ratio=15 rate at 20 °C and 101.3 kPa: 53 to 80 L/min
PM mass calculation^*2		PM mass (in g/test or g/kWh) can be calculated and saved, based on integrated values of flow rated and dilution ratio.
Configurations
System configuration		・Main unit: Dilution-tunnel unit ・Operation unit: PC, monitor, keyboard and mouse (table is not included)
Utilities		・Purified air: for dilution gas, 400 to 700 kPa, oil free, at least 100 L/min (at 20 °C and 101.3 kPa)
Power supply voltage and frequency		・Main unit: 100/110/120/200/220/230/240 V AC, 50/60 Hz, single phase ・Operation unit: 100/110/120/200/220/230/240 V AC, 50/60 Hz, single phase
Power requirements		Main unit: Max. 3.0 kVA / Operation unit: Max. 0.5 kVA
Dimensions		・Main unit: 570 (W) × 730 (D) × 1700 (H) mm ・Space for operation unit: 900 (W) × 500 (D) mm (table is not included)
Mass		Main unit: Approx. 300 kg (excluding operation unit)
Number of filter lines		Max. 6 lines (5 for sample, 1 for bypass)
Type of filter holder		・φ70 mm type: actual PM sampling area φ60 mm, with back-up filter ・φ47 mm type: actual PM sampling area φ38.8 mm^1, with back-up filter^1
Operating conditions
Sampling Pressure		Between atmospheric pressure and up to 40 kPa Back pressure of exhaust line: Less than 1 kPa
Options
Filter auto-changer^*3		Changer for automatic replacement of PM filter (φ 47 mm), both single-filter method and multi-filter method are available.
Valve switching		Additional air valve before filter (Replacement of sampling filter on bypass mode)
HOST interface^*3		LAN communication using a 10 Base T port Conforms to IEEE802.3 (ISO880 2/3)
Conditioner for dilution air / Compressor

*1, For the filter face velocity in the regulations (less than 100 cm/s), the flow rate for the φ47 mm filter must be 65 standard L/min.
*2, Input the amount of PM collected on filter to calculate PM mass. It is necessary to input engine output (kW) to calculate the PM mass engine output (g/kWh).
*3, Please contact HORIBA, when you order.