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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.