Computer Simulation Results

Click on any of the two images below to view them in fullscreen!

Animated opeation IMFS-limited

Animated operation IMFS-full

I. Fuel consumption and CO2 emissions simulations done by the independent TNO Automotive ( ).

Vehicle and simulation driving patterns

First of all, a well known 5 tons truck of the Family of Medium tactical Vehicles (FMTV) of Armor holdings, weighting 15119 kg (33300 lbs) including the permitted load and either IMFS, or Permo-Drive system (which is actually equivalent to the BoschRexroth HRB and to Eaton HLA) with a 7.2 liter diesel engine was used as base for the simulations.

The impact of the IMFS and the Permo-Drive systems was calculated over the following conditions:

The Transit Coach Operating Duty Cycle. It was originally designed to measure heavy-duty vehicle’s fuel economy (SAE J1376). This cycle, also referred to as Business-Arterial-Commuter (BAC) to reflect its composite character, includes a sequence of the following segments performed on a chassis dynamometer: Central Business District segment, Arterial segment, and Commuter segment;
Steady state speeds on-road 70 km/h (43.5 mph);


The table below sums up TNO findings.


As it can be seen, at BAC cycle, IMFS is per 168% (!!!) more efficient in regard to fuel consumption and CO2 cutting than Permo Driveâ RDS (i.e. also than the BoschRexroth’s HRB and to Eaton’s HLA). As far the constant speed drive, according to TNO’s findings IMFS provides for 4% fuel and CO2 savings, while the known conventional Hydraulic Hybrids (Permo Drive’s RDS, BoschRexroth’s HRB and Eaton’s HLA) do not provide for any savings!

II. Fuel consumption and CO2 emissions simulations done by proprietary ACI Engineering tools

ACI Engineering has developed computer simulation programs related to some popular type approval test cycles, such as NEDC, US FTP-75, BAC, etc. If interested in specific figures of improvements concerning specific vehicle, we are ready to run our simulators, and to provide you with the expected results.