Method and system for detecting and handling automatic transmission pressure filter clogging failure
By detecting automatic transmission pressure filter blockage in real time and increasing the main oil pressure, the problem of oil flow pressure loss caused by pressure filter blockage is solved, thereby improving clutch pressure control accuracy and vehicle comfort, while extending the service life of the pressure filter.
CN116336043BActive Publication Date: 2025-11-25CHONGQING CHANGAN AUTOMOBILE CO LTD
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Patent Information
- Application Number
- CN202310414675.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-18
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2043-04-18
AI Technical Summary
Technical Problem
Clogged pressure filters in automatic transmissions can lead to increased fluid pressure loss, affecting clutch and shift control. This can result in engine runaway and clutch burnout, impacting vehicle ride comfort.
Method used
By detecting pressure filter blockage in real time, the transmission main oil pressure is gradually increased to enhance the filter's flow capacity, reduce clutch pressure control difference, and prevent engine runaway and clutch burnout.
Benefits of technology
It improves the precision of clutch pressure and torque control, protects transmission hardware, enhances vehicle driving comfort, and extends the service life of pressure filters.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses an automatic transmission pressure filter blockage fault detection and processing method and system, comprising the following steps: S1: calculating a pressure filter blockage fault flag bit Fail filter ; S2: calculating a pressure filter blockage fault trigger pressure P b ; S3: calculating a main oil pressure lifting offset P off_L based on the pressure filter blockage fault flag bit Fail filter , a clutch target pressure P tgt_cl and the pressure filter blockage fault trigger pressure P b ; S4: calculating a main oil pressure basic value P base_L , and calculating a main oil pressure command pressure P demand_L according to the main oil pressure basic value P base_L and the main oil pressure lifting offset P off_L . The application can detect and process the automatic transmission pressure filter blockage fault in real time, protects the transmission hardware and improves the vehicle driving comfort, and prolongs the service life of the pressure filter.
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