Dual-Clutch Transmission Layout for Compact Six-Gear Shifting

The patent implements nesting by placing multiple gear levels (at least four gear levels) within a compact axial space. The shift units are arranged between two directly adjacent gear planes, with gears nested at different radial positions and axial locations. This allows six shift units to be accommodated in a condensed configuration without excessive axial length, resolving the contradiction between compactness and arrangement complexity.

The patent utilizes three-dimensional space efficiently by arranging gears not only axially but also radially and in different planes. With at least four gear levels and multiple countershafts (first, second, third countershaft), the system distributes gear elements across multiple dimensions. This dimensional distribution allows compact axial packaging while maintaining manageable gear arrangement complexity through spatial organization.

The transmission system is segmented into multiple independent functional components: at least six shift units, at least four gear levels, first and second input shafts, and first, second, and third countershafts. This segmentation allows each component to be optimized independently and assembled in a compact configuration. The modular arrangement minimizes overall installation space while keeping system complexity manageable through clear functional separation.

The gear levels and countershafts serve multiple functions simultaneously. The at least four gear levels provide both gear transmission and structural support for multiple shift units. The first, second, and third countershafts handle multiple gear engagements and power flow paths. This multi-functionality reduces the number of separate components needed, minimizing installation space without proportionally increasing system complexity.