CA2212308A1 - A solenoid valve control device - Google Patents
A solenoid valve control deviceInfo
- Publication number
- CA2212308A1 CA2212308A1 CA 2212308 CA2212308A CA2212308A1 CA 2212308 A1 CA2212308 A1 CA 2212308A1 CA 2212308 CA2212308 CA 2212308 CA 2212308 A CA2212308 A CA 2212308A CA 2212308 A1 CA2212308 A1 CA 2212308A1
- Authority
- CA
- Canada
- Prior art keywords
- output pressure
- solenoid valve
- pressure
- command
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Magnetically Actuated Valves (AREA)
- Feedback Control In General (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Three-position solenoid valve which outputs an output pressure and can adopt exhaust, overlapping and supply positions. The output pressure is detected by an output pressure sensor and is fed back to a fuzzy control unit.
Based on the difference between the output pressure and the command pressure corresponding to the pressure command signal from the brake control unit, such fuzzy control unit calculates a command current value for controlling the three-position solenoid valve by fuzzy reasoning. The command current value can adopt an essentially continuous value, and consequently the three-position solenoid valve can adopt a gentle exhaust state or a gentle supply state. In this way, sudden changes in the output pressure can be suppressed and the output pressure can be made to converge rapidly on the command pressure and eliminate overshoot and undershoot.
Based on the difference between the output pressure and the command pressure corresponding to the pressure command signal from the brake control unit, such fuzzy control unit calculates a command current value for controlling the three-position solenoid valve by fuzzy reasoning. The command current value can adopt an essentially continuous value, and consequently the three-position solenoid valve can adopt a gentle exhaust state or a gentle supply state. In this way, sudden changes in the output pressure can be suppressed and the output pressure can be made to converge rapidly on the command pressure and eliminate overshoot and undershoot.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/801,851 US5775367A (en) | 1996-02-22 | 1997-02-21 | Solenoid valve control device |
US801,851 | 1997-02-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2212308A1 true CA2212308A1 (en) | 1998-08-21 |
CA2212308C CA2212308C (en) | 2001-01-16 |
Family
ID=25182188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2212308 Expired - Fee Related CA2212308C (en) | 1997-02-21 | 1997-08-01 | A solenoid valve control device |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2212308C (en) |
-
1997
- 1997-08-01 CA CA 2212308 patent/CA2212308C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2212308C (en) | 2001-01-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |