Transmission Department
Transmission Department: From Concept to Validation
At the Transmission Department, we provide an integrated suite of technical services that supports the complete lifecycle of gearbox development—from concept initiation to physical validation. Our capabilities are grounded in a system-level engineering perspective, where each analysis or design task contributes to a coherent, manufacturable, and reliable transmission solution.
This model was then mechanically optimized using specialized design software to maintain performance while improving structural integrity and efficiency. As a result, the redesigned component featured a more reliable and efficient design compared to the original.
Our workflows accommodate both open-loop and closed-loop development models. In open-loop scenarios, we focus on delivering foundational design elements such as gear geometry, shaft sizing, and housing layout with minimal iterative feedback. In contrast, our closed-loop engineering approach incorporates continuous validation feedback—through simulation and testing—to progressively refine the design across performance, durability, and manufacturability metrics.
This dual-track capability allows us to tailor our engagement based on customer needs, whether for rapid prototyping or long-term production programs.
We conduct detailed evaluations of gearbox components using a hybrid methodology that blends classical hand calculations with high-fidelity numerical modeling. These studies address:
- Gear-level analysis: contact pattern distribution, stress concentration zones, pitting and scoring potential
- Shaft analysis: torsional and bending stiffness, modal behavior, fatigue life under multi-axial loading
- Housing analysis: deformation under torque-induced loading, cooling flow interaction, mounting behavior
The use of industry-standard tools such as ANSYS, ROMAX, and KissSoft ensures that each evaluation aligns with recognized automotive and industrial standards while supporting iterative design refinement.
The internal mechanisms of gearboxes—such as synchronizers, shift forks, planetary arrangements, and differential modules—are subject to complex motion sequences and constraint interactions. Through comprehensive kinematic modeling and virtual motion studies, we:
- Examine torque path behavior during shifts
- Identify potential conflict zones in linkage operation
- Optimize profiles for smooth operation and durability
These evaluations are particularly vital during early design stages where mechanical conflicts or inefficiencies can propagate into more significant system-level issues if not addressed.
To address the realities of vehicle operation, our engineering team performs dynamic and NVH simulations across a range of real-world scenarios. This includes:
- Gear meshing behavior under variable torque conditions
- Torsional oscillation modeling across the drivetrain
- Shift shock prediction and energy dissipation mapping
- Resonance avoidance strategies in rotating and structural components
We combine Multi-Body Dynamics (MBD) with modal and harmonic analyses to assess the full spectrum of vibration sources—enabling us to implement noise-reduction strategies without compromising structural robustness or weight targets.
Precision in gear shifting is a defining metric for both mechanical quality and driving experience. Our services in this domain cover:
- Engagement timing and synchronizer performance assessment
- Backlash measurement and its effect on NVH and durability
- Gear tooth alignment optimization to minimize shift shock
- Load distribution across gear flanks under misalignment scenarios
These studies not only enhance shift feel but also contribute to long-term transmission reliability by reducing wear and minimizing unintended torque reversals.
Simulation results are verified and extended through a structured physical validation process. We design and conduct experimental programs to evaluate:
- Backlash under thermal and dynamic load cycles
- Tooth contact patterns during sustained torque application
- Efficiency under various lubrication regimes
- Durability through accelerated life-cycle testing
Insights from these tests are used to close the loop with simulation models, refine material and geometry choices, and ultimately, verify compliance with customer and regulatory performance standards.
