Abnormality detecting device for vehicular hydraulic pressure control circuit
US6907970B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Apr 20, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/906
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an abnormality detecting device and method for a vehicular hydraulic pressure control circuit, which determines an abnormality that has occurred in a hydraulic pressure control circuit including an electromagnetic control valve which generates hydraulic pressure corresponding to a signal supplied from an electronic control unit, and a hydraulic switch which is turned ON when the hydraulic pressure generated by the electromagnetic control valve is equal to or higher than a predetermined value, a power supply of the electronic control unit is kept ON for a predetermined time after an ignition switch is turned from ON to OFF, and an abnormality that has occurred in the hydraulic pressure control circuit is detected within the predetermined time. Thus, it is possible to reliably detect an abnormality that has occurred in the vehicular hydraulic pressure control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.