MD-ASM-150-AWD (4×4)

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MD-ASM-150-AWD (4×4) Overview

The MD-ASM-150-AWD (4×4) tests both axles of the test vehicle under the same imposed load; while at the same time providing for front-to-rear axle speed synchronization. Front-to-back roller speed synchronization protects AWD center differentials, provides for a means to safely test 2WD vehicles with traction control, and allows for testing to be performed under real-world load conditions. The MD-ASM-150-AWD (4×4) accommodates wheelbases from 86 to 128 inches (218 – 325 cm) without moving parts.

High throughput demands of Centralized Emission Inspection require the use of rugged and durable emission inspection equipment. Designed from inception to withstand punishing use and misuse, Mustang Dynamometer has set the performance standards of equipment manufactured and used worldwide for centralized emissions testing. Our pioneering experience has led us to be the world leader in the design and manufacturing of rugged inspection and maintenance hardware and software for the I/M industry. We have centralized testing lanes installed all over the world in climates from cold to hot and from wet to dry. By the end of 2016 we estimate that our equipment has tested nearly 850 million vehicles. Continuous improvement leads us to innovative solutions based on our knowledge of design, service, maintenance, ergonomics and overall functional capabilities. Mustang I/M Centralized Emission Inspection equipment is designed for our customer’s demands. Compliant with EPA, BAR, and CENAM ASM specifications.

MD-ASM-150-AWD (4×4) Specifications

Certifications: UL listed, BAR certified, El Centro Nacional de Metrología (CENAM) Approved, Manufactured in an ISO Certified Plant

Max Horsepower: 300 hp (224 kW) peak measurement capacity

Loading Device: Air-cooled eddy current power absorber (Model MDK-70) with dual temperature sensors

Motor: 10-hp (7.5 kW) calibration motor

Inertia: 2,000 lbs. (907 kg) base mechanical inertia, nominal

Max Speed: 100 mph (160 km/h)

Rolls/Wheelbase:

Precision machined & dynamically balanced


8.575” (218 mm) diameter balanced rolls


35” (889 mm) face length


30” (762 mm) inner track width


100” (2,540 mm) outer track width


17.1” (434 mm) roll spacing

86” – 128″ (218 – 325 cm) wheelbase range

Rollers are belted for bi-directional testing capability

Load Cell: 500 lb. range, stainless steel, S beam load cell

Speed Sensor: 60 ppr encoder

Roll Lock: Between roll lift with integrated roll lock

Roll Decelerator: Allows vehicle deceleration without use of vehicle brakes. Eddy Current PAU used to decelerate rollers.

Calibrations: Capable of performing warm-ups, inertia verification, parasitic loss determination, and coast-down calibration verification in accordance with EPA, BAR and CENAM specifications

Air Requirements: 100 PSI, dry, regulated, oil free

Power Requirements:

230 VAC, single phase, 50/60 Hz, 30 Amps

230VAC, three phase, 50/60 Hz, 50 Amps

Axle Weight: 6,000 lbs. (2,727 kg) maximum

Shipping Weight: 9,000 lbs. (4,090 kg)

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