Partix Auto Partix Auto

OEM/ODM Transmission Fluid Cooler Factory & Supplier

Next-Generation Thermal Management Systems for Global Automotive and Heavy-Duty Powertrains

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Shenzhen Partix Auto Co., Ltd.

Founded in 2004, Shenzhen Partix Auto Co., Ltd. sits in Zhucheng, Shandong. This strategic geographic position lies close to Weifang, the renowned kite capital, and falls within the key one-hour logistics circle around Qingdao. Consequently, international transport by sea, road, and air remains fluid, rapid, and highly cost-efficient.

Over the past two decades, Partix Auto has established itself as a national high-tech enterprise and a state-owned holding listed firm. Driven by relentless R&D and a commitment to technical precision, we have earned the title of "National Intellectual Property Demonstration Enterprise." Since 2006, industry authorities have consistently named Partix Auto among the "National Top 100 Automotive Parts Suppliers."

Our engineering expertise spans high-performance transmission fluid coolers, advanced fluid pipelines, structural air suspension systems, and precision-engineered rubber vibration-damping parts. Our products serve as vital components in passenger cars, heavy-duty commercial vehicles, and complex engineering machinery worldwide.

2004
Established Year
Top 100
National Auto Supplier
100%
IATF 16949 Certified

Deep-Dive Whitepaper: Advanced Transmission Fluid Cooling Technologies

Executive Summary: As modern automotive transmissions evolve toward higher speeds, dual-clutch topologies (DCT), continuously variable mechanisms (CVT), and integrated electric drive units (EDU), thermal regulation has transitioned from a supporting function to a critical performance limiter. High-efficiency transmission fluid coolers (TFC) are essential for maintaining oil viscosity, preventing thermal breakdown of frictional materials, and protecting control solenoids.

1. Thermodynamic Mechanics & Heat Exchange Architectures

Modern transmission fluid coolers rely on highly optimized geometries to maximize heat dissipation area while minimizing internal fluid pressure drops. The two primary core architectures used in OEM and tier-1 configurations include:

  • Plate-Fin Heat Exchangers: Consisting of stacked pressed aluminum plates interspersed with high-performance turbulator fins. The internal turbulators disrupt boundary layer fluid flows, inducing local vorticity to enhance convective heat transfer coefficients of highly viscous transmission fluids.
  • Tube-and-Fin Coolers: Traditionally utilized in cost-sensitive applications or heavy-duty secondary auxiliary circuits, these units employ extruded oval tubes with external multi-louvered fins to maximize ambient air interaction.

By leveraging advanced Controlled Atmosphere Brazing (CAB) lines, Partix Auto constructs structural aluminum matrix joints that exhibit absolute zero thermal resistance interfaces, ensuring sustained structural integrity under high pressure and thermal shock profiles.

2. Macro Industry Solutions: Demands Across Diverse Platforms

Thermal management requirements vary greatly across automotive and industrial sectors. Custom OEM development requires tailored solutions for each application:

Electric & Hybrid Drivetrains

Hybrid power systems demand dual-fluid heat exchangers that balance both traction motor stator cooling and high-speed reduction gear lubrication using specialized ultra-low viscosity fluids (e.g., dedicated DHT fluids).

Commercial & Heavy Duty

Commercial trucks and heavy off-highway machinery operate under high continuous torque load cycles. They require heavy-duty plate-fin coolers with integrated bypass valves to prevent cold-start over-pressurization.

High Performance ICE & DCT

Modern multi-speed automatics (8AT/9AT/10AT) and dual-clutch layouts demand high-transient thermal response capabilities, utilizing compact oil-to-coolant (liquid-to-liquid) heat exchangers mounted directly to the transmission casing.

3. Material Science & Durability Engineering

Corrosion resistance and fatigue resistance under high cyclic pressures are key metrics for transmission coolers. Partix Auto utilizes high-grade 3003 and 6063 aluminum alloys clad with custom sacrificial zinc protection layers. Key testing protocols include:

  • Pressure Impulse Cycles: Surviving 150,000+ pressure variation cycles ranging from 0 to 2.5 MPa at a test fluid temperature of 120°C.
  • Thermal Cycling: Validating structural resilience by rapidly cycling internal coolant temperatures between -40°C and +150°C.
  • Salt Spray & Environmental Exposure: Passing ASTM B117 salt spray tests for over 480 hours to ensure long-term resistance to atmospheric moisture and road de-icing agents.

China Industry 4.0: Smart Manufacturing & Supply Chain Resilience

Operating from our state-of-the-art Zhucheng facility, Partix Auto leverages advanced automation to ensure stable batch quality and competitive pricing. Our Smart Factory 4.0 initiative integrates:

Automated Brazing

Precision nitrogen-purged CAB furnaces that maintain optimal temperature uniformity (+/-2°C) for perfect brazing joints.

Robotic Assembly

Advanced assembly systems that position and align cooling plate stacks to ensure precise structural dimensions.

In-Line Testing

100% automated helium leak detection systems that identify micro-porosities before products leave the production line.

MES Traceability

A complete Manufacturing Execution System that tracks raw material batch codes to the finished part shipment.

Located near Qingdao, our facility benefits from excellent transport infrastructure, ensuring fast shipping times and lower freight costs for global logistics operations.

Technical Roadmap & Future Outlook of Transmission Cooling

As the automotive industry transitions to next-generation powertrains, the technology roadmap for transmission fluid coolers focuses on key innovations:

Microchannel Heat Exchanger (MCHE) Integration

By moving from standard plate designs to microchannel flat tubes, we can reduce internal fluid volumes by up to 35% while increasing the heat transfer surface area. This configuration allows for lighter heat exchangers, supporting weight-reduction goals in electric and hybrid vehicles.

Integrated Smart Thermal Manifolds

Future cooling systems will feature built-in smart components, including electronically controlled proportional bypass valves and temperature sensors. These components allow the vehicle's ECU to adjust fluid pathways dynamically, accelerating transmission warmup times and reducing drag losses during cold starts.

Our Global Manufacturing Facilities

Advanced machinery, production lines, and quality control systems at Partix Auto.

Production Facility 1 Production Facility 2 Production Facility 3 Production Facility 4
Testing Equipment 1 Testing Equipment 2 Testing Equipment 3 Testing Equipment 4
Engineering Flowchart Packaging Facility

Global Sourcing & Procurement Engineering Workflows

For international buyers and OEM procurement managers, Partix Auto provides a structured stage-gate development workflow designed to minimize project lead times and ensure regulatory compliance:

Phase 1: Concept & Simulation (1-2 Weeks)
We input your parameters (fluid viscosity curves, pressure drops, maximum heat load, space constraints) into our finite element analysis (FEA) and computational fluid dynamics (CFD) models to create the optimal design.

Phase 2: Prototype Validation (3-4 Weeks)
We build functional rapid prototypes using precision CNC and prototype CAB lines. These units undergo bursts, pressure cycles, and thermal shock testing in our laboratory.

Phase 3: Tooling & PPAP Approval (6-8 Weeks)
We complete multi-cavity stamping tool development and compile the required Production Part Approval Process (PPAP Level 3) documentation, including FMEA, Control Plans, and Dimensional Reports.

Frequently Asked Questions

Get answers to technical and supply chain questions from our engineering team.

What primary aluminum alloys are used in your transmission fluid coolers?
We use high-grade 3003 and 6063 aluminum alloys as our core structural materials. These alloys are combined with high-quality clad brazing sheets (typically containing 4343 or 4045 filler layers) to ensure strong, leak-free joints during controlled atmosphere brazing.
How does Partix Auto ensure leak-free quality for high-volume orders?
We perform 100% helium leak detection on all fluid cooler assemblies, which allows us to find tiny micro-leaks down to 1x10-5 mbar·l/s. We also run automated vision systems to verify critical structural dimensions and mounting alignments on the production line.
Can you provide custom engineering services for niche industrial or racing applications?
Yes, our engineering team offers full ODM and OEM services. We can design custom internal turbulator profiles, mounting brackets, and connector fittings (such as threaded AN fittings, quick-connects, or hose barbs) to meet your performance target.
What certifications does the Partix Auto factory hold?
We are fully certified under IATF 16949 for automotive quality management systems, ISO 9001 for general quality operations, and ISO 14001 for environmental management. All our heat exchangers and cooling components comply with global REACH and RoHS regulations.
What is the typical tooling and lead time for a new product design?
Once design drawings are signed off, prototype tooling and sample production take 3 to 4 weeks. Hard production tooling and final PPAP validation require 6 to 8 weeks, allowing us to start volume production quickly.

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