150500274

1. Simplified Dry Clutch Electro-Hydraulic Control System

Based on the open-loop + closed-loop hybrid control algorithm of the previous-generation DQ200 control module, this unit optimizes the clutch engagement smoothness and reduces hardware complexity. It integrates a low-pressure fixed-displacement gear pump (maximum pressure 12 MPa, 40% lower than 24041957) and 8 precision solenoid valves (6 fewer than 24041957, omitting hybrid-specific valves). It collects real-time signals from 14 key sensors (excluding hybrid-related sensors, mainly covering clutch position, oil pressure, and engine speed).

 The data processing relies on a dual-core Infineon AURIX TC234 MCU (operating frequency up to 160 MHz, 47% lower than 24041957) to meet basic control needs while reducing costs.

Basic Torque Clutch Engagement: For entry-level models such as Volkswagen Golf 8 1.4T, the control unit controls the clutch engagement pressure gradient to 0.2 MPa/10 ms. When accelerating from a standstill, it adjusts the pressure of clutch K1 from 0 to 8 MPa in 120 ms, ensuring that the 250 N·m peak torque of the 1.4T engine is smoothly transmitted without obvious jitter. The pressure fluctuation range is controlled within ±0.15 MPa, which is wider than 24041957 but sufficient for daily use;

Dry Clutch Temperature Management: Aiming at the heat dissipation characteristics of dry clutches, the control unit adds a "slip rate dynamic adjustment" function. It adjusts the clutch slip rate (controlled between 1%-2%) according to the ambient temperature and driving frequency. When the clutch temperature exceeds 110℃ (e.g., frequent start-stop in urban traffic jams), it reduces the slip rate by 0.5% and extends the gearshift interval by 100 ms to avoid overheating—simpler than the dual fan cooling system of 24041957 but more targeted for dry clutches;

Front-Wheel Drive System Coordination: For front-wheel drive models, the control unit establishes a basic communication channel with the ESC system, with a communication delay of less than 150 ms (higher than 24041957 but meeting daily needs). When driving on slippery roads, it reduces the clutch engagement speed by 30% when the front wheel slip rate exceeds 15%, avoiding torque shock during start-up.

2. Daily-Oriented Gearshift Execution Mechanism

Leveraging the "pre-selection + gradual pressure build-up" gear design of the third-generation DQ200 transmission, the 150500274 control unit optimizes gearshift smoothness for urban commuting scenarios, abandoning the rapid shift function of high-performance models.

Daily Commute Shift Response: In Normal mode (the only driving mode for most models), the control unit completes 1-2 gear shifts in 0.35 seconds and skip shifts (e.g., 5-2) in 0.6 seconds. Taking the Volkswagen Golf 8 1.4T as an example, when accelerating at half throttle, it completes 1-4 gear shifts continuously with slight power interruption, and the 0-100 km/h acceleration time is about 8.6 seconds—meeting daily commuting needs but significantly slower than 24041957's 0.18-second shift speed;