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Brand: C.OEFT
OE numbers: LF8M189E1F
Product Name: Transmission Control Module
Compatible model:
Product status: Remanufactured
Product weight: 0.293KG
Packaging size: 17*17*8.5cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Mazda
1. Multi-Gear Precise Control for Dynamic and Comfortable Shifting
The LF8M189E1F TCU adopts a high-torque adaptive gear coordination algorithm (supporting 8-speed/9-speed high-torque AT, 7-speed high-performance PHEV DCT, and luxury eCVT) to achieve millisecond-level control of shifting actions, balancing extreme dynamic response and luxury-level shifting comfort. It collects real-time signals from 15+ high-precision sensors (vehicle speed, engine torque, motor power, oil pressure, clutch wear, etc.), and through a built-in dual-core high-performance MCU (processing frequency up to 250 MHz), calculates the optimal shifting timing and pressure curve in 6-8 ms.
For 8-speed/9-speed high-torque AT models (e.g., luxury mid-size SUVs with 3.0T engines), when the driver switches to "Sport+" mode and accelerates rapidly (throttle opening > 90%), the TCU activates the "extreme downshift strategy": it skips 2-3 gears (e.g., from 8th gear directly to 5th gear) and increases the solenoid valve pressure by 0.4-0.6 MPa in 8 ms, shortening the shift time to 0.15-0.2 seconds—30% faster than standard mid-to-high-end TCUs. In "Comfort" mode (urban luxury commuting), the TCU extends the shift interval (e.g., shifting from 3rd to 4th gear at 50 km/h instead of 45 km/h) and reduces the pressure gradient to 0.08 MPa/10 ms, resulting in a jerking amplitude of less than 2.0 m/s²—far below the 3.5 m/s² industry average for luxury AT models. For high-performance PHEV DCT models, the TCU coordinates the dual-clutch pre-charging logic: when switching from electric to hybrid mode, it pre-charges the even-gear clutch with 0.3 MPa low-pressure oil 0.2 seconds in advance, achieving "zero-power-interruption" mode switching.
2. Deep Hybrid System Synergy Control
A core functional advantage of the LF8M189E1F TCU is its high-voltage hybrid precise coordination capability, compatible with high-voltage PHEV (300-400V) and luxury HEV systems, focusing on efficient energy distribution between the engine, dual motors, and high-capacity battery. It adopts a "triple-condition" intelligent control logic: based on battery SOC, driving conditions, and user mode selection, it dynamically adjusts the engine start/stop timing, motor output torque ratio, and transmission gear ratio to maximize energy utilization and dynamic performance.
When the battery SOC is high (> 75%, pure electric mode), the TCU cuts off the engine fuel supply, maintains the engine clutch pressure at 0.08 MPa (disengaged), and controls the dual motors to drive the vehicle in parallel—supporting a pure electric range of up to 100 km for luxury PHEV models. When the SOC is medium (40%-75%, hybrid mode), the TCU activates the "engine-motor torque sharing strategy": at low speeds (< 60 km/h), the front motor provides 70%-80% of the torque to reduce engine idling loss; at high speeds (> 120 km/h), the engine takes over the main driving task (outputting 80%-90% of the torque) and the rear motor enters high-efficiency power generation mode. During regenerative braking (e.g., decelerating from 120 km/h to 0), the TCU adjusts the dual motors to reverse torque (up to 250 N·m) and coordinates the clutch pressure to 0.6-0.8 MPa, achieving a braking energy recovery rate of up to 88%—15% higher than ordinary mid-to-high-end hybrid TCUs. For low-temperature cold starts (< -30℃), the TCU controls the engine to run at 1,800 rpm for 1.5 minutes and activates the battery pre-heating function, avoiding battery performance degradation in extreme environments and ensuring normal start-up.
1. Wide Compatibility with Mid-to-High-End and Luxury Models
The LF8M189E1F TCU adopts a highly flexible modular hardware architecture and configurable luxury-level software, supporting multiple high-end transmission types and luxury brands, and has strong adaptability:
Transmission Type Compatibility: Fully compatible with 8-speed/9-speed high-torque AT (e.g., ZF 8HP75, Aisin AWF8F45), 7-speed high-performance PHEV DCT (e.g., Getrag 7DCT400, BorgWarner 7DCT350), and luxury HEV eCVT systems (e.g., Toyota THS III, Lexus Hybrid Drive). It can adapt to different high-voltage transmission control protocols (CAN FD, Ethernet) by replacing the communication module, with no need for hardware modification—reducing the development cycle for luxury vehicle manufacturers by 40%.
Brand and Market Adaptation: In the global market, it is matched with mid-to-high-end models of multiple luxury brands, including BMW 5 Series, Mercedes-Benz E-Class, Audi A6L, Lexus ES Hybrid, and domestic high-end models such as BYD Han EV, NIO ET5. In China, it is a standard component for FAW-Audi A6L PHEV, GAC Toyota Lexus ES Hybrid, and SAIC BMW 530Le. It supports multiple regional emission standards (China VI b, Euro 6d, US EPA Tier 3) and is calibrated according to the driving habits of different regions (e.g., optimizing low-speed shifting logic for congested urban roads in China, and high-speed stability for highway-dominated European roads).
Power System Adaptation: It is compatible with multiple high-performance power sources, including high-displacement fuel engines (2.0T-3.0T), high-voltage PHEV systems (engine + dual motors), and luxury HEV systems (engine + single motor). For different engine torques (300-500 N·m) and motor powers (150-250 kW), it can adjust the clutch pressure control curve and torque distribution ratio through software calibration—avoiding the need for developing multiple TCU variants and reducing inventory pressure for luxury vehicle manufacturers and repair shops.
2. High-Precision Control and Energy-Saving Performance
Ultra-High Control Precision: The LF8M189E1F TCU adopts a dual-core MCU (Infineon AURIX TC497) with a high-performance floating-point operation unit, which can calculate the clutch pressure and gear shifting timing with an error of less than 1%. The built-in high-precision ADC (18-bit resolution) can collect sensor signals with an accuracy of ±0.005 V, ensuring the solenoid valve pressure control accuracy is ±0.02 MPa—higher than the ±0.05 MPa of ordinary mid-to-high-end TCUs. This high precision enables the transmission to achieve "silent seamless shifting" (jerking amplitude < 1.5 m/s²) and reduces clutch friction loss by 20%.
Excellent Energy-Saving Effect: Through optimized control strategies (adaptive shifting, deep hybrid power distribution, high-efficiency regenerative braking), the TCU significantly improves the vehicle’s fuel economy and pure electric range. For 8-speed AT fuel models, it reduces fuel consumption by 10%-15% compared to traditional TCUs (e.g., from 9.0 L/100 km to 7.6 L/100 km). For high-voltage PHEV models, it increases the pure electric range by 10%-15% (e.g., from 85 km to 98 km) and reduces the comprehensive fuel consumption to 0.8-1.2 L/100 km—meeting the requirements of China’s new energy vehicle high-end subsidy policies and luxury users’ energy-saving needs.
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