ANVIL Series Engine Mount Torque-Meter

OVERVIEW OF MEASUREMENT SYSTEM

Type of Measurement: Output Torsionals to an Automotive Engine

Typical Test: Engine Testing Dynamometer
 

• Resolution accuracy: 0.02 % ( 1 part in 5,000 )
• Fatigue Life:100 Million Cycles
• Temperature Range: -25 ºF to +225 ºF
• Calibration Repeatability: 0.02 %
• Test Environment: Dyno Lab

 

Special Test Conditions: (Torque-Meter bolts to engine in place of a transmission)

Torque Capacity / Torsional Overload / Extraneous Loads / Maximum RPM:
 

	Rated Capacity : 600 ft.-lbs.		Rated Capacity : 1,000 ft.-lbs.
	Working Capacity : 400 ft.-lbs.		Working Capacity : 600 ft.-lbs.
	Peak Torque : 600 ft.-lbs.		Peak Torque : 1,000 ft.-lbs.
	Overload Rating : 2,000 ft.-lbs.		Overload Rating : 4,000 ft.-lbs.
	Maximum RPM : 12,000		Maximum RPM : 6,000

Torque-Meter Features:

• Short Length Unit for Maximizing Torsional Stiffness.
• Heat Treated Housing with an Integral Flange Mount for Mechanical Rigidity and Reduced Fretting Corrosion at the Load Bearing Surfaces
• Optional Excitation Carrier Frequencies of 3kHz, 3.28kHz, 5kHz, 10kHz, 20kHz
• Thermocouple ports for Monitoring of Bearing Temperatures
• Accelerometer Mounting Surfaces for Monitoring Alignment, Balance & Resonance Vibrations

Torque-Meter Description:

     Torque-meter is designed to be integrated into an automotive engine testing dynamometer. Torque-meter measures the output torsionals of the engine being tested. One end of the torque-meter has a shaft, which is fixtured to the loading device, via a double-flex coupling. The other torque-meter end, mounts with a special double flex coupling arrangement, to the crankshaft flange. Torque-meter housing is heat treated for mechanical rigidity and reduced fretting corrosion at the load bearing surfaces. Housing has an integral circular flange that mounts to a bell type housing that will be attached to the engine block.

Torque-meter uses passive strain gage technology on a rotating shaft. Mechanical stress is converted to strain, which is transduced into a voltage signal via strain gages in a full Wheatstone bridge arrangement. Communication between stationary and rotating worlds is performed via a rotary transformer. The rotary transformer requires an AC Excitation Voltage and transmits back an Amplitude Modulated Signal Voltage (mV) @ the Excitation Frequency, which is a measurement of the applied Torque.

Torque-Meter Options:

• Transformer Operating Frequencies of 3kHz, 3.28kHz, 5kHz, 10kHz or 20kHz.
• Bearing Thermocouple Probe Ass'y; Type J , Type K or Type T
• Housing Accelerometers
• Warning Sensors for Monitoring Alignment, Mass-Unbalance & Resonance Vibrations
• Speed Sensor or Angular Encoder
• High Output or High Overload / Torsional Tuning of Center Member

Torque-Meter Specifications:

• Overload Capability : 400 % Typical (note: Overload may be reduced by Flange Capability)
• Nominal Output @ Rated Capacity : 2 mV/V
• Excitation Voltage : 5 to 20 VAC @ ?kHz
• Excitation Loading Impedance : 100 Ohm
• Non-Repeatability : 0.02 % of rated output
• Max. Non-Linearity : 0.05 % of rated output
• Max. Hysteresis : 0.05 % of rated output
• Compensated Temperature Range : +70 to 225 ºF
• Useable Temperature Range : -25 to 225 ºF
• Temperature effect on Output : 0.002 % / ºF of rated output
• Temperature effect on Zero Balance : 0.002 % / ºF of rated output
• Min. Insulation Resistance : 5,000 Mega-Ohm
• Typical Zero Balance : 2 % of rated output