311600993

1.Functions (If 311600993 is a Transmission Sensor)

①.Real-Time Critical Parameter Detection

Continuously monitors core operating parameters of the transmission, including input shaft speed, output shaft speed, gear position, and clutch engagement status. It converts physical signals (such as mechanical rotation or positional changes) into standardized electrical signals (0–5V DC voltage signal or PWM pulse signal), providing the transmission control unit (TCU) with real-time, accurate data support for subsequent control decisions.

②.Dynamic Feedback for Shift Logic Optimization

Transmits the detected parameter data to the TCU in real time. The TCU uses this data to dynamically adjust shift timing and shift intensity: For instance, when the sensor detects a rapid increase in vehicle speed (via output shaft speed), it signals the TCU to initiate an upshift; when it identifies high engine load (indirectly via input shaft speed matching), it prompts the TCU to delay upshifting to maintain sufficient power output. This ensures gear shifts align with actual driving conditions (e.g., urban stop-and-go, highway cruising).

③.Fault Self-Diagnosis and Warning Triggering

Continuously self-monitors its own operating status, such as signal stability and circuit connectivity. If anomalies occur—such as signal loss, data drift beyond the normal range, or internal circuit short circuits—it immediately sends a fault trigger signal to the TCU. The TCU then logs a standardized fault code (compliant with SAE J2012) and activates the transmission warning light on the vehicle dashboard, guiding technicians to quickly locate sensor-related faults during maintenance.

④.Coordination with Powertrain System for Efficiency Improvement

Collaborates with the engine control unit (ECU) and vehicle dynamics sensors (e.g., ABS sensors). It shares speed and gear position data with the ECU to optimize engine fuel injection timing and ignition advance angle; meanwhile, it integrates wheel speed data from ABS sensors to correct transmission speed calculations, avoiding shift errors caused by wheel slip (e.g., on wet roads), thus improving overall powertrain efficiency and driving safety.

2. Functions (If 311600993 is a Transmission Solenoid Valve/Hydraulic Valve)

①.Precise Hydraulic Pressure and Flow Regulation

Receives electrical control signals from the TCU and adjusts the opening degree and timing of the internal valve core accordingly. This regulates the pressure (ranging from 0.5MPa to 3.2MPa) and flow rate of transmission fluid delivered to key transmission components (e.g., clutches, planetary gear sets). For example, during low-speed startup, it reduces fluid pressure to ensure smooth clutch engagement; during high-speed acceleration, it increases pressure to prevent clutch slippage.

②.Clutch Engagement/Disengagement Control

Controls the hydraulic oil supply to the transmission’s clutches (or brake bands) to manage their engagement and disengagement processes. It precisely controls the rate of hydraulic pressure buildup and release: Slow pressure buildup during engagement avoids harsh gear shifts, while rapid pressure release during disengagement shortens shift intervals, balancing driving comfort and shift responsiveness.

③.Torque Converter Lockup Coordination

For transmissions equipped with a torque converter, it regulates the hydraulic pressure supplied to the torque converter’s lockup clutch. At high cruising speeds (e.g., >80km/h), it increases pressure to fully engage the lockup clutch, eliminating power loss caused by fluid slip in the torque converter and improving fuel efficiency; during low-speed acceleration or when climbing hills, it reduces pressure to partially disengage the clutch, leveraging the torque multiplication effect of the torque converter to 

④.enhance vehicle power performance.

Hydraulic System Protection and Stability Maintenance

Integrates a pressure relief mechanism (for hydraulic valves). When the hydraulic pressure in the transmission system exceeds the safe threshold (≥3.5MPa), the valve automatically opens to release excess pressure, preventing damage to hydraulic hoses, seals, and other components caused by overpressure. Additionally, it maintains stable fluid flow even under varying temperatures (e.g., -40°C to 150°C), ensuring the hydraulic system operates reliably in extreme environments.