DT Dyno

Hydraulic Dynamometer

DT-type hydraulic dynamometers are a core component of HORIBA’s Engine Dynamometer portfolio, offering reliable and precise load control across a wide range of engine testing applications. Available in power ratings from 700 kW up to 4,500 kW, these systems are well-suited for testing high-performance internal combustion engines (ICE) and hydrogen internal combustion engines (H2ICE).

Engineered for durability and efficiency, DT hydraulic dynamometers feature a robust, compact design and utilize high-quality materials to ensure consistent performance with minimal maintenance. Their proven reliability makes them an ideal solution for demanding engine dynamometer test cells and advanced R&D environments.

Flexible Rotation Configurations

HORIBA DT-type hydraulic dynamometers, as part of our Engine Dynamometer solutions, are typically optimized for a single direction of rotation to deliver maximum torque performance across a wide speed range. For applications requiring greater flexibility, configurations supporting two directions of rotation are also available.

While bidirectional systems offer enhanced versatility, their maximum torque is slightly reduced compared to single-direction designs. The number of rotation directions is indicated in the model designation—for example, DT700-1 represents a dynamometer configured for one direction of rotation.

Applications

HORIBA hydraulic Engine Dynamometers are available in a variety of sizes and configurations, enabling accurate testing across a broad range of engine types, including:

Internal combustion engines (ICE) for passenger and commercial vehicles
Hydrogen internal combustion engines (H2ICE)
Aircraft engines and gas turbines
Large engines for rail and other heavy-duty applications

Key Benefits

Robust, long-lasting design for demanding engine dynamometer testing environments
Excellent price-to-performance ratio (Euro/kW) compared to eddy current dynamometers and AC dynamometer systems
High-quality materials for reliable, consistent operation
Simplified maintenance through patented flexure support design
Fast and precise torque control (typical response time ~1 second) when paired with HORIBA control and power systems

Torque/Speed Measuring Systems

Speed Measurement Error:	rpm	±1, not smaller than 0.025% of FSD
Torque Measuring Error:	%	Accuracy class 0.2% of FSD hysteresis error <0.2%, linearity <0.2% temperature drift <0.2% per 10K change of ambient temp.
Speed Control Error*:	rpm	±10
Torque control Error*:	%	±1% of FSD

*Related to the hydraulic dyno, power control unit and HORIBA test stand controller

Colour - Light Grey (RAL 7035)
Transport and Storage Temperature - -50°C to +85°C
Working Temperature - 0°C to 60°C without coolant additives

Dynamometers with one rotor and one direction of rotation

	Power [kW]	Max Speed [rpm]	Rated Torque [Nm]	Rotor Inertia [kgm²]	Weight [kg]
DT700-1	700	7500	3000	0.30	370
DT900-1	900	6500	4000	0.6	500
DT1200-1	1200	5500	7500	1.2	650
DT2100-1	2100	4000	15000	3.9	1300
DT3600-1	3600	3000	35000	18.4	3200
DT4500-1	4500	2700	50000	29.5	3400

Dynamometers with one rotor and two directions of rotation

	Power [kW]	Max Speed [rpm]	Rated Torque [Nm]	Rotor Inertia [kgm²]	Weight [kg]
DT700-2	700	7500	2600	0.3	370
DT900-2	900	6500	4000	0.6	500
DT1200-2	1200	5500	6000	1.2	650
DT2100-2	2100	4000	15000	3.9	1300
DT3600-2	3600	3000	30000	18.4	3200
DT4500-2	4500	2700	40000	29.5	3400