Our products are only available under a global license arrangement. Please contact our SALES team if you would like to discuss license options on any of our product range.

Hydro Mechanical Transmission (HMT)

Truck and Car Transmission Drives

Making a gearbox incorporate the HMT technology opens up significant advantages as the gearbox can be designed to offer a non – burnout clutch, variable gear ratios, hydraulic regeneration at any road speed, auxiliary drives for compressors, alternators etc.

This gearbox will rival any manual, automated manual and fully automatic gearbox. The system will allow engine speeds to remain relatively constant, which allows the engine management system the best chance of offering fuel efficiency. Hydraulic power regeneration through the transmission will offer higher efficiency than most systems because we can operate the pump/motor at speeds better suited to high performance operation. Some tail shaft regeneration systems have no gear ratios and cannot be hot shifted, limiting them to relatively low speeds.

Cost Efficiencies and Energy Regeneration

Potentially an automated HMT with hydraulic regeneration would be a fraction of the cost of existing systems. Bus and coach fleets are substantial and hydraulic regeneration is being developed by many companies, but none can offer the functionality, value for money and power density this system offers. The energy should be re-used at the highest fuel demand points which are the moments of inertia and high acceleration.

The HMT coupling section can also be designed to supply fluid power to other sources such as the front wheels of buses and heavy vehicles. By supplying some tractive effort to the steer wheels, when required in snow, ice mud etc., increases mobility and safety. This option will be attractive to municipal transport and defence equipment.

For an Information Pack including operational DVD on the Hydro Mechanical Transmission (HMT) Drive, please contact the Mathers Hydraulics SALES team.


FPMC 2014 September 10-12 - University of Bath 01/05/2014 pdf

An Efficient Fan Drive System Based on a Novel Hydraulic Transmission.

Mathers Hydro-Mechanical Transmission - Striking The Right Balance 01/05/2014 pdf

An article by Jack Burke in the Diesel Progress magazine, on the Balance

The Sweet Spot for Hydraulic Drivetrains: Midsized Turbines 28/04/2014 pdf

An article by Paul Dvorak, in the WindPower Engineering & Develo

Mathers Hydro-Mechanical Transmission (HMT)
Awarded 2 year Research Grant by CCEFP
26/03/2014 pdf

Centre for Compact and Efficient Fluid Power (,  a NSF ba

The Secret to Leak-Free Hydraulic Connections 01/06/2013 pdf

Leaking flare joints can be eliminated by installing a conical washer be

Event Hosted by Engineers Australia 03/11/2011 pdf

Event Hosted by Engineers Australia  Norm Mathers - Guest speak

Improved Safety and Efficiency of Trucks 11/09/2011 pdf

Discussion on improving cooling efficiency and ambient capability of hea

Seals Provide Leak-Free Solution For Fittings 09/08/2011 pdf

The Flaretite Seal is a metal stamping, designed with multiple, concentr

Flaretite Seals Solve Nuclear Problem 15/09/2009 pdf

The Maintenance Manager of a large Nuclear Power Generating Plant said t

Mathers FSV- Fuel Saving Pump 01/06/2008 pdf

Discussion on improving cooling efficiency and ambient capability of hea

The Mathers FSV in Efficient Cooling of Heavy Trucks 16/05/2008 pdf

Article on the benefits of using the Mathers Fuel Saving Pump in the eff

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Investment Opportunity

All investor enquiries should contact, in the first instance.

Due to its potential growth and requirements for future capital, opportunities are available for sophisticated investors who wish to become involved at the introductory stage of this revolutionary new patented technology.

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Distribution Opportunities

All OEM and manufacturer enquiries should contact, in the first instance.

For OEMs and manufacturers interested in trial programs, please register your details below. Please note that Mathers Hydraulics Technologies has entered into trial programs in waste collection, power steering and tipper/dump operations with both pump and fan drives and is interested in additional partners for 2013 and beyond.

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Research licences

Research licences for transmissions using the Mathers’ hydrostatic torque converter and torque amplifier are available for research institutes and major transport  and machinery companies.

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