Description
Dynamometer system for testing tandem-axle trucks up to 1,000 Hp**. Includes: heavy-duty steel frame and tandem 20″-diameter multi-roll (multiple front/rear wheelbases) assemblies – with machined-in “traction grooves,” pneumatic roller brakes, diamond-tread deck plate, floor anchors, wheel chocks, vehicle tie downs, dual eddy-current absorbers, 220V eddy-current power supply/controllers, electronic S-beam load cells, DYNOmite-Pro data-acquisition computers, DYNO-MAX software, Auto-Load Control, 28-channel data harnesses, temperature thermistor, accessories package, and manual.
| TORQUE TRANSDUCER | |
|
Configuration |
Environmentally sealed S-beam load cell |
|
Maximum displayed torque |
Unlimited ft-lbs [N-m] − real-time and playback |
|
Load-cell range |
Dual 0 to 1,000 pounds [0 to 454 Kg] (other ranges available) |
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Load-cell signal-output gain |
3 millivolts/volt |
|
Load-cell resolution |
Better than 0.02% of full-scale accuracy − typical |
|
Strain gauges |
Linearized full-bridge strain gauges in balanced Wheatstone bridge |
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Advanced linearization (software) |
User-configurable edit table (interpolated deviation map) |
|
System torque resolution |
Better than 0.2% of full-scale accuracy − typical |
|
Calibration features |
Semi-automatic calibration of zero offset |
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Drift stabilization |
Ratiometric supply-voltage and temperature compensation |
| ROLLER FRAME | |
|
Configuration |
Multiple sets of tandem (linked) small-diameter 20″ [50 cm] (nominal) rolls |
|
Mechanical frame construction |
Fully-welded monocoque steel frames, anchoring points, greaseable bearings (pit-plates optional) |
|
Track width (max / min) |
106″ [269 cm] maximum, 38″ [97 cm] minimum (with deck plate in place) |
|
Wheelbase (front to rear) |
106″ – 150″ [269 cm – 381 cm] − multi-roll accommodates range of wheelbases |
|
Wheelbase (tandem axles) |
46″ – 72″ [117 cm – 183 cm] − multi-roll accommodates range of tandem-axle wheel spacing |
|
Absorber coupling |
Overdriven @ 2.0:1 ratio |
|
Installation |
Above ground with integral anchoring points (pit-mounting optional) |
|
Ramps |
Optional dual heavy-duty, lightweight-aluminum, ramps |
|
Pneumatic requirements |
90 PSI [600 kPa] @ 3 CFM [5 meter^3/hr] (for air-brakes and lift-bar options only) |
|
Power requirements, frame only (AWD only) |
115-volts AC @ 60-Hertz [or 230-volts @ 50-Hertz] (specify voltage) for wheelbase adjuster |
| AXLE WEIGHT CAPACITIES | |
|
Maximum dynamic load |
30,000 pounds [13,607 kg] (per axle) |
|
Maximum static load |
30,000 pounds [13,607 kg] (per axle) |
| ROLLS | |
|
Effective inertia range |
Low inertia (to allow absorber simulations) |
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Minimum simulated vehicle mass |
5,100 pounds [2,313 kg] typical (excluding absorption simulation) |
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Minimum balance tolerance |
G2.5 via internal, multi-plane, dynamic spin balancing |
|
Steel-roll construction |
Monocoque with 360-degree welded end plates and 100% machine-finished thru-shafting |
|
Roll-to-tire contact area’s surface finish |
Machined-in “traction grooves” for maximum grip (μ > 1.0) and tire life under high-power testing |
| POWER CAPACITY (TRACTION LIMITED)* | |
|
Industry’s claimed roll-power range* |
3,880 Hp [2,893 KW] |
|
Industry’s claimed engine-power range* |
4,850 Hp [3,617 KW] |
|
Notice |
*Power capacity is unlimited, but subject to roll diameter-induced tire deformation (safety) and traction (efficiency) limits. |
|
Rolling-road’s diameter at tire contact-patch |
~20″ [~50 cm] (see tire manufacturer’s “dyno tire vs. roll-diameter safety guide”) |
|
Tire deformation (due to roll’s diameter) |
2¼” [56 mm] tire indentation (approximate) required for 5″ contact-patch length on typical automotive tire |
|
Maximum displayed power |
Unlimited Hp [Kw] − real-time |
|
Maximum inertial power (traction limited) |
Unlimited Hp [Kw] (but subject to roll diameter’s tire deformation and traction limits) |
|
Maximum tractive force (traction limited) |
Unlimited lbs-force [kN] (but subject to roll diameter’s tire deformation and traction limits) |
|
Typical inertial power range (traction limited) |
18 to 1,480+ Hp (1000 / 2.2″deform*μ*2wd) [14 to 1,100+ KW] limit @ μ = 1.0 |
|
Peak steady-state power |
1,900+ Hp [1,044+ KW] initial − cold absorber rating (also available with higher-rated absorber combinations – see absorber’s load chart) |
|
Typical steady-state power range / time |
25 to 750+ Hp [19 to 559+ KW] extended − warm absorber rating (also available with higher-rated absorber combinations – see absorber’s load chart) |
| ENGINE (AND ABSORBER) TACHOMETERS | |
|
Range |
0 – 32,000+ RPM real-time display (user reconfigurable) |
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Timing reference |
Quartz-crystal calibrated |
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Resolution |
1.0 RPM (typical) |
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Primary RPM signal |
Supports direct connection to most standard vehicle tachometer sources |
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Signal compatibility |
User adjustable trigger voltages − pulse type selectable from ½ to 12 PPR |
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Alternate signal sources |
“Clamp-on” inductive (spark plug, injector, or coil) wire pickup (included) |
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Analog tachometer options |
Optional “cigarette lighter” and optical RPM pickups |
|
Digital tachometer options |
Optional OBD-II tachometer interface |
| DYNO SPEEDOMETER | |
|
Range |
0.0 – 255.0 MPH [0.0 – 410.0 km/h] − real-time digital (user reconfigurable) |
|
Timing reference |
Quartz-crystal calibrated |
|
Resolution |
Better than 0.1 roll RPM (typical) |
|
Standard signal source |
Hall-effect pulse type for RPM/MPH pickup (standard) |
|
Signal compatibility |
User adjustable trigger voltages − pulse type selectable from 1 to 360 PPR standard |
| SPEED RANGE (TIRE DEFORMATION LIMITED) | |
|
Rolling-road’s tire contact-patch diameter |
~20″ [~50 cm] (see tire manufacturer’s “dyno tire vs. roll-diameter safety guide“) |
|
Roll RPM vs. vehicle speed factor |
16.87 RPM per MPH [10.48 RPM per km/h] |
|
Digital speed range |
0 – 255 MPH [0 – 410 km/h] real-time display (user reconfigurable) |
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Safe speed range (tire deformation limited) |
7 – 125 MPH (186sr / 2.2″^.5deform) [11 – 201 km/h] (subject to roll diameter’s tire-deformation limits) |
| LOAD CONTROL (ABSORPTION UNITS ONLY) | |
|
Absorber coupling |
Overdriven @ 2.0:1 ratio |
|
Absorber speed / RPM regulation |
Electronic auto-load control (closed-loop PID) − with full road-load simulation |
|
Absorption method |
Dual electric air-cooled eddy-current absorbers with pulse-width-modulated DC controller (triple eddy-current absorbers optional) |
|
Automated braking |
Yes − Smart Braking™ (via DYNO-MAX) |
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Bidirectional capable |
Yes |
|
Front-to-rear axle-speed synchronization |
Yes − Electronic Axle Synchronization™ (via DYNO-MAX) |
|
Power requirements (for absorber) |
30-amps @ 120-volts AC @ 60-Hertz [or 20-amps @ 240-volts @ 50-Hertz optional] (specify) |
| APPROXIMATE DIMENSIONS AND WEIGHT | (DO NOT CAST ANY PITS, ETC. UNTIL SYSTEM IS ON SITE) |
|
Roller assembly |
Dual sets of tandem (linked) quad-roll ~20″ [~50 cm] multi-bearing frames − eddy absorbers |
|
Width |
138″ [351 cm] |
|
Length (less ramps) |
298″ [757 cm] (extended) |
|
Length (with optional ramps) |
442″ [1,123 cm] (extended) |
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Height (at roll/ramp deck) |
24½” [62 cm] |
|
Height (overall) |
26½” [67 cm] |
|
Weight |
18,000 pounds [8,165 kg] (approximate uncrated − less ramps) |
| DYNAMOMETER CONTROL SOFTWARE | |
|
Features |
Too many to list here − review DYNO-MAX specification pages and demo CD download |
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Notable trademarks |
DYNO-MAX, Smart Ratio, Smart Record, Smart Load, Smart Braking, Smart Print, etc. |
|
Software versions |
DYNOmite EEPROM version # 9.977 plus DYNO-MAX version #10.23 (included) |
| CONTROL CONSOLE AND PC OPTIONS | |
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Computer housing |
Optional enclosed (EMI/RFI resistant) rolling PC cabinet |
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Monitor |
Optional “Pro” console with genuine Intel-equipped Dell PC and 17″ LCD display |
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Wireless remote operation |
Pocket DYNO-MAX™ − wireless Windows Mobile™ PDA control software (included in DYNO-MAX “Pro“) |
| DATA COLLECTION OPTIONS | |
|
Air/fuel ratio monitoring |
Optional 9-19 range AFR exhaust-gas module with portable vacuum pump and tailpipe “sniffer” |
|
Dynamometer control software |
Optional DYNO-MAX software packages (see separate specifications page and demo CD) |
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Electronic throttle control |
Optional unit allows PC to throttle road and track driving simulations (dead man or console mount designs) |
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Exhaust-emissions analyzer |
Optional five-gas analyzer (O2, CO, CO2, HC’s, and NOX) via digital DYNO-MAX RS-232 link. |
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OBD-II link |
Optional OBD-II (wired and wireless) interfaces for RPM, MPH, TPI, etc. |
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Temperature monitoring |
Optional oil-temperature “dip stick” thermocouples |
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Weather station module |
Optional weather station provides automatic entry of air temperature, barometric pressure, and relative humidity. |
| OTHER OPTIONS | |
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Above-ground vehicle hoist |
Optional four-post, adjustable track width, lift − with hydraulic power, control module, and safety air locks |
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Self starting |
Optional starter motor and drive kit |
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Ventilation |
Optional 42″ 13,300 CFM (120-volts @ 60-Hertz 1φ) test-bay cooling fan |
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