TCU Torque Control Signal Splitting to Prevent ESP Interference
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Solution Overview
Problem
In vehicles equipped with ESP and TCU, interference between the systems leads to issues like vehicle jitter, rapid speed decrease, and clutch hardware damage due to simultaneous torque reduction requests from the TCU and TCS during certain operating conditions.
Innovation Solution
The method involves splitting signals between the ESP and TCS to allow the TCU to detect the TCS control state, suspending torque reduction requests when the TCS is active, and sending requests only when necessary to avoid interference, using a CAN bus for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the TCU sends torque reduction requests to the ECU during certain operating conditions, then the transmission control is improved, but interference with the TCS causes vehicle jitter, locking, and clutch damage
Solution Approach 1:
The patent segments the torque reduction request signals by splitting them into separate channels: one for TCU requests and another for TCS requests. This allows the TCU to independently manage transmission control while the TCS manages wheel slip control, preventing interference between the two systems while maintaining各自的功能 effectiveness
Solution Approach 2:
The patent introduces an intermediary mechanism where the TCU detects TCS control state through splitted state signals and suspends its own torque reduction requests when TCS is active. This intermediary detection and coordination mechanism prevents harmful interference while allowing both systems to function when needed
2Adaptability or versatility
If the TCU and TCS both send torque reduction requests simultaneously, then individual system control is maintained, but mutual interference causes excessive rapid vehicle-speed decreasing and hardware damage
Solution Approach 1:
The patent implements preliminary action by having the TCU detect TCS control state through splitted state signals before sending torque reduction requests. When TCS is detected to be in control state, the TCU proactively suspends its torque reduction requests, preventing the harmful cumulative effect of simultaneous torque reduction from both systems
3Strength
If the TCU sends torque reduction requests for clutch protection, then clutch hardware protection is improved, but interference with TCS activation causes excessively rapid clutch damage
Solution Approach 1:
The patent implements feedback mechanism where the TCU continuously monitors TCS control state through splitted state signals and adjusts its torque reduction request behavior accordingly. This feedback loop ensures that clutch protection requests from TCU do not conflict with TCS activation, preventing excessively rapid clutch wear or damage
Data Source
AI summary
A method for preventing interference between a transmission control unit (TCU) and an electronic stability program (ESP). The method comprises: a splitting step: split signals of an ESP and a traction control system (TCS), so that the TCU can learn whether the TCS is in a control state; and a detection and control step: the TCU independently detects split signals of the ESP and the TCS, and when detecting that the TCS is in the control state, the TCU suspends the active sending of a torque decrease request of the TCU to the ECU. In this way, mutual interference between a TCU and a TCS is avoided, and problems of vehicle jitter, vehicle locking, excessively rapid vehicle-speed decreasing, and excessively rapid hardware damage of a clutch are resolved.