Mechanical Torque Converter

Most Automatics including CVT have a hydrodynamic torque converter to perform launching of the vehicle and to provide immediate torque amplification at strong acceleration demands. Such a torque converter is quite robust for heat dissipation during (heavy) launching situations. However, it does have some drawbacks in terms of efficiency and packaging.
Inspired by the planetary powershift modules within the family of powershift technologies, DTI has configured a new and simple mechanical torque converter. This module comprises a brake-controllable planetary gearset that establishes, a torque-amplification gear ratio whenever activated. This function is similar to a traditional torque converter and can be used to perform vehicle launches as well as kick-down manoeuvres. If activation of the torque converter is not required, a powershift is made towards a normal (wet) clutch that sustains engine torque transfer to the CVT. The mechanical torque converter can be positioned either at the CVT input- or output shaft.