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Brand: C.oeft
OE numbers: 0AM927769D
Product Name: Transmission Control Unit TCU TCM
Compatible model: for Volkswagen Audi
Product status: New
Product weight: 1.02KG
Packaging size: 63X41X36 cm
Product packaging: Neutral Package
Car series: Germany
Car type: For Volkswagen Audi
1. Dual-Clutch Precise Coordination for Fast and Smooth Shifting
The 0AM927769D TCU adopts a DSG-specific dual-clutch synergy algorithm, tailored to the dry/wet clutch characteristics of Volkswagen’s 7-speed DSG, to achieve millisecond-level gear pre-selection and clutch engagement control. It collects real-time signals from 14+ dedicated sensors (clutch temperature, clutch travel, input/output shaft speed, oil pressure for wet DSG, etc.), and via a built-in Volkswagen-customized dual-core MCU (processing frequency up to 160 MHz), calculates the optimal clutch pressure and gear switching timing in 7-10 ms.
For dry-type DQ200 models (e.g., Volkswagen Golf 1.4T), when the driver accelerates moderately (throttle opening 40%-60%), the TCU activates the "pre-selection shifting strategy": while the current gear (e.g., 3rd gear) is engaged, it pre-engages the next gear (4th gear) with the auxiliary clutch at 0.15 MPa low pressure. When shifting is triggered, the main clutch releases pressure at a gradient of 0.2 MPa/8 ms, and the auxiliary clutch increases pressure synchronously—shortening the shift time to 0.2-0.25 seconds, 30% faster than traditional AT transmissions. For wet-type DQ380/DQ381 models (e.g., Volkswagen Passat 2.0T), the TCU optimizes oil pressure control for the wet clutch: during "Sport" mode (throttle opening > 80%), it increases the clutch engagement pressure by 0.3 MPa to enhance torque transmission, ensuring no slipping even under 350 N·m peak torque; in "Comfort" mode, it reduces the pressure gradient to 0.08 MPa/10 ms, lowering the jerking amplitude to less than 2.6 m/s²—improving daily driving comfort.
2. Adaptive Clutch Wear Compensation and Durability Management
A core functional advantage of the 0AM927769D TCU is its DSG-targeted clutch wear compensation system, designed to address the common wear issue of dual-clutch transmissions and extend clutch service life. It monitors clutch wear status in real time through three key parameters: clutch slip rate (during engagement), clutch travel deviation (compared to initial state), and clutch temperature (via built-in NTC sensor).
When the clutch wear reaches 15% (detected by increased travel deviation > 0.5 mm), the TCU activates the "wear compensation logic": it adjusts the clutch engagement travel by 0.3-0.5 mm and increases the initial engagement pressure by 0.05-0.1 MPa to maintain the original shifting feel. For dry-type DSG, it optimizes the clutch cooling fan control: when clutch temperature exceeds 110℃ (urban stop-and-go traffic), the TCU increases the fan speed by 30% to reduce heat accumulation—lowering the risk of overheating failure by 40%. For wet-type DSG, it adjusts the oil circulation rate: during high-load driving (engine torque > 280 N·m), the TCU increases the oil pump speed to enhance clutch cooling, keeping the oil temperature below 95℃. Additionally, the TCU records clutch wear data (total engagement times, cumulative slip distance) in the EEPROM, which can be read via Volkswagen’s diagnostic system (VAS 6154) to help maintenance personnel judge whether the clutch needs replacement.
1. Exclusive Compatibility with Volkswagen Group DSG Models
The 0AM927769D TCU is a Volkswagen-customized TCU exclusively designed for the group’s 7-speed DSG transmissions, with strong model adaptability:
Transmission Compatibility: Fully compatible with Volkswagen’s 7-speed dry-type DSG (DQ200, used in 1.4T models such as Golf, Sagitar, Lavida) and 7-speed wet-type DSG (DQ380/DQ381, used in 2.0T models such as Passat, Tiguan L, Arteon). It supports DSG’s hydraulic control system (for wet DSG) and electronic clutch actuator (for dry DSG) without hardware modification—ensuring 100% matching with Volkswagen’s DSG hardware.
Brand and Model Adaptation: It is the original TCU for Volkswagen Group’s mainstream models, including Volkswagen Golf Mk8, Passat B8, Tiguan L, Skoda Octavia, and Audi A3 (equipped with DQ200). In China, it is used in SAIC-Volkswagen Lavida, FAW-Volkswagen Sagitar, and SAIC-Volkswagen Skoda Octavia—supporting China VI b emission standards and optimized for domestic urban traffic conditions (e.g., reducing clutch wear in frequent stop-and-go traffic).
Power System Adaptation: Compatible with Volkswagen’s EA211 series (1.4T, 150 HP) and EA888 series (2.0T low/high power, 190 HP/220 HP) engines. It is pre-calibrated with the engine’s torque curve—for example, when matching the EA888 2.0T high-power engine, it adjusts the clutch pressure to 1.8-2.0 MPa to transmit the maximum 350 N·m torque, avoiding clutch slipping.
2. High-Precision DSG Control and Fuel Economy
Dual-Clutch Control Precision: The 0AM927769D TCU adopts a Volkswagen-customized dual-core MCU (Infineon AURIX TC377) with a dedicated DSG control algorithm, achieving clutch pressure control accuracy of ±0.02 MPa and gear switching timing error of less than 2 ms. For dry-type DSG, it controls the clutch engagement travel with an accuracy of ±0.1 mm—ensuring consistent shifting feel even after long-term use. For wet-type DSG, it optimizes the oil pressure control of the hydraulic valve group, reducing pressure fluctuation by 30% compared to universal TCUs.
Fuel Economy Optimization: Through DSG’s fast shifting and clutch slip control, the TCU improves the vehicle’s fuel economy. For Golf 1.4T (DQ200), it reduces comprehensive fuel consumption to 5.8-6.2 L/100 km—15% lower than traditional 6-speed AT models. For Passat 2.0T low-power (DQ381), it achieves a comprehensive fuel consumption of 6.5-6.8 L/100 km, meeting Volkswagen’s fuel economy standards for mid-size sedans.
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