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Main concepts


The engine test bench is the equipment used to measure all the parameters of the operation of an engine, including the power and torque curves; such data can be collected and subsequently analyzed, through special probes and acquisition systems.

The motor is installed and linked directly to the axis of the eddy current brake dynamometer.


Unlike mechanical brakes, which are based on friction and kinetic energy, eddy current brakes are based on electromagnetism, in order to stop objects from moving. Eddy currents are created when a conductor passes through a magnetic field, which creates opposing forces that spin inside the conductor.

They operate wear-free, maintenance-free, contact-free and have an almost unlimited service life, under normal conditions.

The dynamometer (engine dyno or chassis dyno) can also be equipped (as in our case) with an asynchronous electric motor; this asynchronous motor, working in parallel with the brake, is required in reproducing the operating conditions on the road, including driving cycles, typical of homologation and pre-homologation processes.

The measurement of the forces involved is provided by special load cells or professional torque meters.

torque meter engine dyno


The roller test bench (often called ‘dyno or chassis dynamometer’) for cars or motorcycles, mainly allows detecting (without removing the engine from the vehicle) the torque and power curves. Although with different characteristics and precision, the two instruments offer data that we intend to be comparable, especially in developing prototypes.

Where the engine bench is necessary for processes such as pre-approval and homologation, the roller bench is an excellent tool where there is a need for a diagnostic, performance development (ECU management) or homologation processes (driving cycles)


In order to achieve time-savings during vehicle development, companies are increasingly looking to run the same tests on the engine test bed, as on the chassis dynamometer.

The aim is to correlate results in order to highlight differences (and their influencing factors) as well as to verify the engine test bed results, and to achieve the benefit of reusing and compare existing tests.

In each of these test environments, various testing tasks are carried out. For instance, an engine testbed is used during the development phase to verify the engine durability and thermodynamics. Also, it’s used to set up the base calibration of the ECU and predict the engine emission behavior, using vehicle simulation.

For example, emission tests are carried out on an engine testbed and repeated on the vehicle testbed for certification; drivability assessment and powertrain calibration optimization are carried out on engine, driveline and vehicle testbeds and verified later in the vehicle on the road; climatic testing takes place on the engine testbed and again later on the vehicle testbed; durability testing and driving cycles takes place on the transmission testbed and again later on the vehicle testbed (or in the road)

The OEMs are coming under ever-increasing pressure to reduce the time to market of new vehicles while saving on development costs. This translates into a need for an efficient and shorter product development process.

A common test automation and data platform is required. We provide a complete platform which offer the whole range of exported archives, in order to meet customers standards and habits.

Contact us for more information

dyno rolling road

REengineering Engine Testing:

  • 20 years of experience in engine testing, in Automotive and Motorsport 
  • In-depth knowledge in the fields of precision mechanics and power electronics
  • Partnerships with big players in the automotive business are continuously allowing us to develop a full range of services from prototype to homologation process

Get in touch with REengineering engine testing