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Brand: C.OEFT
OE numbers: 0BH
Product Name: Transmission Control Unit
Compatible model:DQ500
Product status: New
Product weight: 0.5176KG
Packaging size: 63*41*36cm
Product packaging: Neutral Packaging
Car Series: Germany
Car Type: for Volkswagen and Audi
1. Ultra-High Torque Dual-Clutch Control
As the core of DQ500 transmission control, the 0BH TCU adopts a reinforced dual-clutch pressure closed-loop control algorithm to achieve precise control of clutches capable of bearing up to 600 N·m torque. It collects real-time data from 18 key sensors (2 additional clutch temperature sensors and 2 load pressure sensors compared to 0DE927711B) and processes signals through a triple-core MCU (Infineon AURIX TC397, operating frequency up to 300 MHz)—50% higher processing speed than the dual-core chip of 0DE927711B.
High-Torque Engagement Strategy: When transmitting peak torque (e.g., 500 N·m for Audi RS Q3), the TCU increases the clutch engagement pressure to 3.0-3.2 MPa (vs. 2.2 MPa for 0DE927711B) and extends the pressure build-up time to 15 ms, reducing clutch slip rate to below 0.8% (half of the 0DE series);
Rapid Shift under High Load: In sport mode, the TCU activates the "pre-charge + pressure jump" strategy—pre-charging the next gear clutch with 0.4 MPa pressure (double that of 0DE927711B) and completing pressure boost of 1.2 MPa within 10 ms, shortening shift time to 0.20-0.28 seconds. For example, the Audi RS Q3 accelerates from 0 to 100 km/h in 4.5 seconds, with no power interruption during 1-4 gear shifts;
Enhanced Heat Management: The TCU links three cooling systems (oil cooling, water cooling, air cooling) and adjusts the oil pump speed in 5 levels. When clutch temperature exceeds 140℃ (common in commercial vehicle long uphill scenarios), it activates the water-oil heat exchanger and increases oil pump speed to 4,000 rpm (37.5% higher than 0DE927711B), reducing clutch temperature by 5℃ per minute.
2. Multi-Scenario Adaptive Shift Logic
The 0BH TCU is equipped with a professional-grade driving scenario recognition system that classifies driving conditions into 5 types ("urban commute", "high-speed cruising", "off-road climbing", "heavy load transportation", "sport racing") by analyzing 1,200+ sets of real-time data (including suspension load, terrain gradient, and fuel injection quantity) stored in high-capacity EEPROM (write cycle of 500,000 times).
Off-Road Mode (detected by 4Motion off-road switch): The TCU locks the shift point at 2,500-3,000 rpm, disables 6th and 7th gears, and increases clutch engagement pressure by 0.5 MPa to prevent slip on muddy or rocky roads. For example, the Volkswagen Amarok maintains 3rd gear when climbing a 25° slope with a full load of 1.5 tons;
Heavy Load Mode (detected by suspension pressure sensor): When the load exceeds 80% of the rated capacity (e.g., MAN TGE with 3 tons of cargo), the TCU delays upshifting by 10 km/h (e.g., shifting from 3rd to 4th gear at 65 km/h instead of 55 km/h) and reduces shift frequency by 40% to avoid clutch fatigue;
Sport Racing Mode: The TCU disables upshifting when the accelerator is fully depressed, maintains the engine at peak torque range (4,500-6,000 rpm), and shortens the downshift response time to 0.12 seconds. For example, the Audi TT RS completes 3-2-1 sequential downshifts within 0.3 seconds when braking into a corner.
1. Industry-Leading Torque Bearing Capacity
The TCU’s hardware and software are fully optimized for high torque:
Transmission Compatibility: Exclusive adaptation to DQ500 transmission with maximum torque of 600 N·m (1.4 times that of DQ381), supporting engines with power up to 450 HP (e.g., Audi RS 3’s 2.5T engine);
Pressure Control Range: Clutch engagement pressure range of 0.1-3.5 MPa (vs. 0.1-2.2 MPa for 0DE927711B), meeting the torque transmission needs of both passenger and commercial vehicles;
Torque Reserve Design: Reserve 20% of torque margin—even when the engine outputs transient torque exceeding the rated value (e.g., 550 N·m for 500 N·m rated transmission), the TCU can still maintain stable control.
2. Commercial-Grade Durability
The TCU’s hardware is designed to withstand harsh working environments:
Rugged Housing: Adopts die-cast aluminum alloy housing (instead of plastic for 0DE series) with IP6K9K protection level, resisting impact (50 G acceleration) and corrosion (salt spray test for 1,000 hours);
Extreme Environment Adaptation: Operating temperature range of -45℃ to 150℃ (wider than the -40℃ to 140℃ of 0DE927711B), adapting to cold regions (e.g., Siberia) and high-temperature deserts (e.g., Sahara);
Long-Term Reliability: Undergoes 12,000-hour high-temperature durability testing (twice that of 0DE series) and 30,000-cycle clutch engagement testing, with MTBF exceeding 2 million hours (33% higher than 0DE927711B).
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