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The paper considers a kinematic scheme for a shaft gearbox. This scheme allows implementing a gear selection algorithm providing a flexible strategy for shift control, uncharacteristic for traditional preselective direct-shift gearboxes (DSG). Adjacent modes are prepared for use by shifting gears. Shifts can be performed with skipping gears. The control is automatic, and it is also possible to manually select the gear. Other transmission components (mechanical or hydrodynamic) can be series-connected to this gearbox. The scheme allows to implement 9 forward gear modes and up to 3 reverse gear modes in a roller gearbox. The control elements of the gearbox are individual oil friction disk clutches. The friction clutches are primarily electrohydraulic-actuated, with the option for pulse-width pressure modulation. The main aspects of the novel gearbox designed are briefly described. We have given the characteristics for the family of kinematic schemes to which the gearbox belongs, proposing the expressions that allow to relate the number of shafts, controls and possible operating modes of the gearbox. The main advantages and disadvantages of the schemes are given and briefly analyzed.

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Transmissions of Construction and Transport Vehicles with Preselective Gearbox

  • 会议论文

  • 发表日期：

    2026年

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  • R. Yu. Dobretsov,
  • A. A. Krasilnikov,
  • N. N. Demidov,
  • A. G. Semyonov

摘要

The paper considers a kinematic scheme for a shaft gearbox. This scheme allows implementing a gear selection algorithm providing a flexible strategy for shift control, uncharacteristic for traditional preselective direct-shift gearboxes (DSG). Adjacent modes are prepared for use by shifting gears. Shifts can be performed with skipping gears. The control is automatic, and it is also possible to manually select the gear. Other transmission components (mechanical or hydrodynamic) can be series-connected to this gearbox. The scheme allows to implement 9 forward gear modes and up to 3 reverse gear modes in a roller gearbox. The control elements of the gearbox are individual oil friction disk clutches. The friction clutches are primarily electrohydraulic-actuated, with the option for pulse-width pressure modulation. The main aspects of the novel gearbox designed are briefly described. We have given the characteristics for the family of kinematic schemes to which the gearbox belongs, proposing the expressions that allow to relate the number of shafts, controls and possible operating modes of the gearbox. The main advantages and disadvantages of the schemes are given and briefly analyzed.