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Brand: C.OEFT
OE numbers: K114
Product Name: Transmission Steel Belt
Compatible model:
Product status:Remanufactured
Product weight: 1.800KG
Packaging size: 32X13X4 cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Toyota
1. Core Power Transmission for K114 Luxury Hybrid CVTs
As the central component of Toyota’s K114 CVT, the K114 steel belt transfers power from high-performance gasoline engines (2.5L-3.5L) and dual high-output electric motors to the drive wheels. It operates between two variable-diameter conical pulleys (primary, connected to the engine/motor assembly; secondary, connected to the drivetrain). When the L-HTCU activates high-pressure hydraulic actuators (capable of 320 bar pressure) to adjust pulley width, the belt moves along the pulley cones—riding higher on one pulley and lower on the other—to alter the transmission ratio. This enables stepless speed variation, balancing the combined power of dual powertrains and eliminating gear shift shocks for a luxury-grade smooth ride.
2. Stepless Ratio Adjustment for Luxury Performance Versatility
The belt’s modular design—comprising 138 interlocked ultra-high-strength metal elements and two triple-reinforced steel-CFRP composite rings—adapts to the K114 CVT’s expansive pulley diameter range. Lower ratios (0.35-1.2) provide extreme torque multiplication for flagship hybrid launch (engine+dual motor boost) or towing heavy loads (up to 5,000 lbs for SUV models). Higher ratios (1.2-2.60) optimize fuel efficiency and quiet operation for highway cruising, allowing the engine to run at low RPM and the hybrid system to prioritize electric mode for extended periods. This stepless adjustment ensures the powertrain remains in its optimal efficiency and comfort band across urban commutes, long-distance travels, and spirited driving.
3. High-Variable Torque Management for Flagship Hybrids
Designed to handle maximum torque outputs of up to 350 Nm (matching the K114 CVT’s rated capacity for flagship hybrid powertrains), the K114 steel belt distributes highly variable torque evenly across its elements and composite rings. The enhanced DLC-coated contact surfaces ensure uniform pressure against the magnesium-alloy pulleys, preventing localized stress, element deformation, or wear even during rapid torque transitions—such as switching from full electric mode to combined power, or from acceleration to regenerative braking. This capability ensures reliable power transfer for Toyota’s premium hybrids, whether delivering serene cruising or exhilarating performance.
4. Thermal & Noise Regulation for Luxury Durability
The ultra-low-friction surface of the K114 steel belt minimizes heat generation during high-variable torque operation, helping maintain the K114 CVT’s optimal temperature range (90-110°C)—critical for preventing overheating in flagship hybrid powertrains with concentrated heat from dual motors and larger engines. The enhanced DLC coating enhances wear resistance by 50% compared to standard DLC, minimizing metal-to-metal wear between the belt and pulleys. Additionally, the noise-dampening element design reduces operational sound, preserving the quiet cabin ambiance of luxury models. This protects the CVT’s premium internal components (e.g., high-precision actuators, motor-generator interfaces) and extends the transmission’s overall lifespan.
5. L-HTCU Integration for Adaptive Luxury Hybrid Control
The K114 steel belt works in seamless synergy with Toyota’s L-HTCU, which monitors real-time data from engine speed, dual motor output, battery state of charge, vehicle load, and driver input (via throttle and brake sensors). The L-HTCU uses this data to calculate the optimal transmission ratio and sends precision signals to adjust pulley width—with the belt responding instantly to maintain the perfect balance between power, efficiency, and quietness. If abnormalities are detected (e.g., belt slippage, irregular wear, or overheating), the L-HTCU triggers a luxury-specific warning on the digital instrument cluster, adjusts hybrid power distribution to protect the CVT, and even prioritizes electric mode for limp-home capability. This adaptive control ensures the powertrain operates at the pinnacle of efficiency, reliability, and luxury comfort—aligning with Toyota’s flagship vehicle standards.
1. OE-Luxury Compatibility for Toyota K114 Premium & Flagship Hybrid CVTs
The Transmission Steel Belt K114 is exclusively engineered as a direct OE replacement for Toyota’s K114 series CVTs—tailored for premium mid-size, full-size, and flagship hybrid models, including Toyota Crown (S220), Lexus ES 300h, Lexus RX 450h, and Lexus LS 500h. Adhering strictly to Toyota’s luxury-grade OE standards, it matches the genuine steel belt’s critical parameters with ultra-micro precision: 2.6mm pitch length, 138 metal elements, and an overall dimensional tolerance of ±0.01mm. This meticulous compliance eliminates aftermarket pitfalls like pulley misalignment, belt slippage, or communication latency with Toyota’s Luxury Hybrid Transmission Control Unit (L-HTCU). Mechanics can achieve plug-and-play installation without modifying the K114 CVT’s forged magnesium-alloy conical pulleys or recalibrating the L-HTCU, ensuring seamless integration with Toyota’s premium and flagship hybrid powertrain ecosystems.
2. Ultra-High-Strength Composite Construction for Flagship Torque
Crafted from a state-of-the-art quadruple-layer composite, the K114 steel belt features a core of martensitic stainless steel (SUS420J2) with an ultimate tensile strength of 2,200 MPa, a middle layer of carbon fiber-reinforced polymer (CFRP) for lightweight rigidity, a titanium-nickel alloy buffer layer for torque shock absorption, and an enhanced diamond-like carbon (DLC) coating on contact surfaces. This ultra-strong build delivers 30% higher torque-bearing capacity than the K112 model, enabling it to withstand continuous pulley pressure of up to 6,000 N. It undergoes a luxury automotive-grade heat treatment process—including vacuum carburizing at 920°C, cryogenic quenching, and precision tempering—to achieve a surface hardness of HV 720 while retaining flexible adaptability. The belt resists fatigue even after 400,000+ kilometers of operation, perfectly suited for the high and variable torque demands of Toyota’s flagship hybrid powertrains (combining gasoline engines and high-output electric motors).
3. Low-Friction & Quiet-Operation Design for Luxury Efficiency
The steel belt’s metal elements feature a nano-polished surface with a roughness value (Ra) of ≤0.1μm, minimizing frictional resistance between the belt and CVT pulleys by 20% compared to the K112. This ultra-low-friction design boosts power transfer efficiency to 94%, translating to a 2-3 MPG increase in fuel economy for flagship hybrid models. Additionally, the elements are engineered with a curved contact profile and noise-dampening edges, reducing operating noise by 4-6 dB compared to standard steel belts—critical for the quiet cabin experience of luxury vehicles. Reduced friction also lowers the K114 CVT’s operating temperature by 9-11°C, extending the lifespan of Toyota’s premium WS+ CVT fluid and reducing maintenance frequency for discerning owners.
4. Stable Performance in Flagship Hybrid & High-Torque Scenarios
Equipped with an intelligent adaptive pitch stabilization system (integrated with micro-tension sensors), the K114 steel belt maintains consistent element spacing during extreme torque fluctuations—such as flagship hybrid “Boost Mode” (engine+dual motor )、heavy towing (for SUV models), or rapid regenerative braking. It responds to L-HTCU commands in ≤6ms, enabling seamless ratio transitions across the K114 CVT’s expanded ratio range (0.35-2.60) without slippage, shudder, or power lag. For example, when a Lexus LS 500h accelerates from 0-60 mph (under 5.2 seconds) or a Lexus RX 450h tows a trailer uphill, the belt adapts instantly to pulley width changes, delivering linear power and a silky-smooth driving experience worthy of luxury flagship status.
5. Cost-Effective Luxury Replacement with Premium Reliability
Offering OE-luxury performance at 25-30% lower than genuine Toyota/Lexus OEM steel belts for K114 CVTs, the K114 steel belt provides exceptional value for premium and flagship vehicle owners. Its ultra-durable composite construction reduces replacement frequency by 30% compared to generic belts, cutting long-term maintenance costs for high-mileage luxury users. The belt is fully compatible with Toyota’s luxury K114 CVT service protocols—including flagship-specific hybrid maintenance procedures—and requires no specialized tools, minimizing labor time and vehicle downtime for authorized dealerships and luxury repair shops.
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